Senior Backend Engineer (L5-L6) - 100% remote

🏢 Summary: Senior Backend Software Engineer role focused on designing and delivering highly scalable, distributed backend systems in a cross-functional, AI-native environment. The position involves full software development lifecycle ownership, architectural decision-making, and mentoring while building performant services from scratch. Engineers work with modern cloud and DevOps tooling in a fully remote, agile setup. 🗂️ Requirements: Minimum 5 years backend development experience, 1–2 years experience in senior-level role, Experience building large-scale distributed web applications, Proficiency in one of: Java, Python, Scala, Go, Elixir, C++, Experience designing and developing RESTful APIs, Experience with SQL or NoSQL database modeling, Strong knowledge of data structures and algorithms, Experience with microservices architecture, Experience with cloud platforms, Experience with Docker and Kubernetes, Experience leveraging AI tools for code generation and debugging, Ability to design highly scalable and highly available systems 📃 Skills: Ruby, RoR, Java, Python, Scala, Go, Elixir, C++, REST, SQL, NoSQL, MongoDB, Redis, Microservices, GCP, Docker, Kubernetes, Terraform, Ansible, Elasticsearch, Grafana, Kibana, GitHub, MachineLearning, AI 🏢 Description: As a Senior Backend Software Engineer , you will be a critical part of our growing company, working on a cross-functional team to implement best practices in technology, architecture, and process. You'll have the chance to work in an open and collaborative environment, receive and give hands-on mentorship and have opportunities to grow and accelerate your career. You love both learning and teaching. In this role, you will be interfacing with design, front-end, analytics, as well as teams outside of Engineering. You enjoy working cross functionally to solve hard problems and make an impact. At Apollo, you strive for quality, and are obsessed with improving quality, automation, and squashing any bugs that sneak through. You have a drive to constantly investigate performance improvements and innovative ideas. This is how we organize our work We’re language agnostic, you don’t need any previous Ruby experience for the backend positions. Any of those programming languages - Java, Python, Scala, Go, Elixir, C++ will be great as you'll learn Ruby during the onboarding Responsibilities Design and implement highly scalable backend endpoints Gather product requirements and write design docs to satisfy product needs Drive/Lead full lifecycle of software development: product requirements, architecture, solution design, development, quality assurance, and maintenance Mentor others on best practices and effectively share knowledge Ability to effectively communicate development progress to the product lead, engineering manager, and other stakeholders Be comfortable introducing new technologies and new ideas as required Work effectively as part of a large global team Attend and engage in scrum ceremony meetings, team parties, and manager 1:1s Provide feedback to co-workers in written and verbal form and respond to technical and behavioral feedback from managers and peers Proactively acts without being told what to do. Able to identify areas of improvement and driving best practices to deliver high quality, performant, and scalable solutions Develops services that are highly available and scalable with proper monitoring and alerting in place Able to up-level the team by sharing knowledge and best practices with the engineering team Able to deal with ambiguity Ownership of projects from start to finish. Just because the project has been deployed doesn’t mean it’s done Organized and able to effectively plan and breakdown large projects into smaller tasks that are easier to estimate and deliver Lets others speak and seek to understand their viewpoints A creative and innovative problem solver & previous experience working in an agile, startup environment Confident in owning your role, and bringing creative ideas to the hands of our users Your skillset Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies Minimum 5 years of industry experience in backend development, at least 1-2 years in senior positions, developing large-scale applications Experience developing distributed web applications Your code is comprehensible, well-structured, highly performant Experience with database modeling (SQL or NoSQL both OK) Experience with using and designing RESTful services Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies Strong knowledge of computer science fundamentals, including data structures, algorithms, and object-oriented design Communication Skills Problem Solving, Proactivity Team Player Listening Skills Creativity and Innovation Organization and Planning Dealing with Ambiguity Ownership of projects from start to finish Distributed Web Development Optional BS or MS degree in Computer Science Computer Engineering or similar GCP Kubernetes Docker Mongo Redis Ruby on Rails Microservices Machine Learning This is how we work in house you can change the project you have influence on the choice of tools and technologies you have influence on the technological solutions applied you have influence on the product you develop the code "from scratch" you focus on product development agile Our tech stack: Ruby/RoR, React.js, Typescript, Redux, MongoDB, Elasticsearch, Ansible, Terraform, Grafana, Kibana, Docker, Kubernetes, GCP, GitHub Actions. Development opportunities we offer development budget industry-specific e-learning platforms intracompany training technical knowledge exchange within the company What we offer Base salary + 10% yearly bonus + equity Contract of employment (Polish UoP) + AKUP 50% tax deductible costs with 70% creativity factor for the Eng roles 100% remote work (we don’t have offices and we don’t plan to have them) - no hybrid, no forcing people to get back to the offices Allianz Medical Package and Warta Life Insurance covered by Apollo 1200 USD educational budget 300 USD Work From Home Stipend 4 additional PTO days for Engineering (Rest Days) 100% remote work and flexible working hours AI Learning Budget We are AI Native Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here. What You’ll Love About Apollo Besides the great compensation package and culture that thrives in openness and excellence, we invest tremendous effort into developing our remote employees’ careers. The team embraces that we have a sole purpose: to help customers maximize their full revenue potential on the Apollo platform. This mindset opens us up to a lot of creative approaches to making customers successful at scale. You’ll be a significant part of a lean, remote team, empowered to really own your role as a proactive educator. We’re very collaborative at Apollo, so you’ll be able to lean on your teammates, even in adjacent departments, to help you achieve lofty goals. You’ll be supported and encouraged to experiment and take educated risks that lead to big wins. And, you’ll have a whole team remotely by your side to help you do it!

🏢 Summary: Senior Backend Software Engineer role focused on designing and delivering highly scalable, distributed backend systems in a cross-functional, AI-driven environment. The position involves leading full software development lifecycle, building RESTful services, improving performance and quality, and contributing to architectural decisions. Engineers work with modern cloud-native technologies and have strong influence over tools, solutions, and product development in a fully remote setup. 🗂️ Requirements: Minimum 5 years backend development experience, 1–2 years experience in senior-level role, Experience building large-scale distributed web applications, Experience designing and implementing RESTful services, Experience with SQL or NoSQL database modeling, Strong knowledge of data structures and algorithms, Experience with microservices architecture, Experience with cloud platforms, Experience with containerization and orchestration, Proven use of AI tools for code generation and debugging, Ability to design highly scalable and highly available systems, Experience working in Agile environment 📃 Skills: Java, Python, Scala, Go, Elixir, C++, Ruby, SQL, NoSQL, MongoDB, Redis, GCP, Kubernetes, Docker, Microservices, REST, AI, MachineLearning, Terraform, Ansible, Elasticsearch, Grafana, Kibana, GitHubActions 🏢 Description: As a Senior Backend Software Engineer , you will be a critical part of our growing company, working on a cross-functional team to implement best practices in technology, architecture, and process. You'll have the chance to work in an open and collaborative environment, receive and give hands-on mentorship and have opportunities to grow and accelerate your career. You love both learning and teaching. In this role, you will be interfacing with design, front-end, analytics, as well as teams outside of Engineering. You enjoy working cross functionally to solve hard problems and make an impact. At Apollo, you strive for quality, and are obsessed with improving quality, automation, and squashing any bugs that sneak through. You have a drive to constantly investigate performance improvements and innovative ideas. This is how we organize our work We’re language agnostic, you don’t need any previous Ruby experience for the backend positions. Any of those programming languages - Java, Python, Scala, Go, Elixir, C++ will be great as you'll learn Ruby during the onboarding Responsibilities Design and implement highly scalable backend endpoints Gather product requirements and write design docs to satisfy product needs Drive/Lead full lifecycle of software development: product requirements, architecture, solution design, development, quality assurance, and maintenance Mentor others on best practices and effectively share knowledge Ability to effectively communicate development progress to the product lead, engineering manager, and other stakeholders Be comfortable introducing new technologies and new ideas as required Work effectively as part of a large global team Attend and engage in scrum ceremony meetings, team parties, and manager 1:1s Provide feedback to co-workers in written and verbal form and respond to technical and behavioral feedback from managers and peers Proactively acts without being told what to do. Able to identify areas of improvement and driving best practices to deliver high quality, performant, and scalable solutions Develops services that are highly available and scalable with proper monitoring and alerting in place Able to up-level the team by sharing knowledge and best practices with the engineering team Able to deal with ambiguity Ownership of projects from start to finish. Just because the project has been deployed doesn’t mean it’s done Organized and able to effectively plan and breakdown large projects into smaller tasks that are easier to estimate and deliver Lets others speak and seek to understand their viewpoints A creative and innovative problem solver & previous experience working in an agile, startup environment Confident in owning your role, and bringing creative ideas to the hands of our users Your skillset Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies Minimum 5 years of industry experience in backend development, at least 1-2 years in senior positions, developing large-scale applications Experience developing distributed web applications Your code is comprehensible, well-structured, highly performant Experience with database modeling (SQL or NoSQL both OK) Experience with using and designing RESTful services Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies Strong knowledge of computer science fundamentals, including data structures, algorithms, and object-oriented design Communication Skills Problem Solving, Proactivity Team Player Listening Skills Creativity and Innovation Organization and Planning Dealing with Ambiguity Ownership of projects from start to finish Distributed Web Development Optional BS or MS degree in Computer Science Computer Engineering or similar GCP Kubernetes Docker Mongo Redis Ruby on Rails Microservices Machine Learning This is how we work in house you can change the project you have influence on the choice of tools and technologies you have influence on the technological solutions applied you have influence on the product you develop the code "from scratch" you focus on product development agile Our tech stack: Ruby/RoR, React.js, Typescript, Redux, MongoDB, Elasticsearch, Ansible, Terraform, Grafana, Kibana, Docker, Kubernetes, GCP, GitHub Actions. Development opportunities we offer development budget industry-specific e-learning platforms intracompany training technical knowledge exchange within the company What we offer Base salary + 10% yearly bonus + equity Contract of employment (Polish UoP) + AKUP 50% tax deductible costs with 70% creativity factor for the Eng roles 100% remote work (we don’t have offices and we don’t plan to have them) - no hybrid, no forcing people to get back to the offices Allianz Medical Package and Warta Life Insurance covered by Apollo 1200 USD educational budget 300 USD Work From Home Stipend 4 additional PTO days for Engineering (Rest Days) 100% remote work and flexible working hours AI Learning Budget We are AI Native Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here. What You’ll Love About Apollo Besides the great compensation package and culture that thrives in openness and excellence, we invest tremendous effort into developing our remote employees’ careers. The team embraces that we have a sole purpose: to help customers maximize their full revenue potential on the Apollo platform. This mindset opens us up to a lot of creative approaches to making customers successful at scale. You’ll be a significant part of a lean, remote team, empowered to really own your role as a proactive educator. We’re very collaborative at Apollo, so you’ll be able to lean on your teammates, even in adjacent departments, to help you achieve lofty goals. You’ll be supported and encouraged to experiment and take educated risks that lead to big wins. And, you’ll have a whole team remotely by your side to help you do it!

🏢 Summary: Senior AI Software Engineer – Backend role focused on designing, building, and scaling production-grade AI backend services, including LLM integrations, RAG pipelines, and distributed cloud-native systems. The position emphasizes reliable, observable, and secure AI solutions deployed in AWS using modern backend and infrastructure practices. You will work in an Agile environment delivering scalable APIs, microservices, and AI-driven workflows for enterprise use cases. 🗂️ Requirements: Bachelor’s degree in Computer Science, Software Engineering, Data Engineering, or related field, 6+ years backend or software engineering experience, Hands-on experience delivering AI-enabled or data-intensive backend solutions, Proficiency in at least one backend language: Python, Java, Go, Kotlin, C#, or TypeScript, Strong experience building REST APIs, microservices, and distributed systems, Experience with Python backend frameworks such as FastAPI and async programming, Experience integrating LLMs or cloud AI services with orchestration layers, Knowledge of RAG, vector search, and semantic retrieval concepts, Experience with SQL and NoSQL databases, Experience with AWS cloud services and cloud-native architectures, Experience with Terraform or infrastructure-as-code tools, Experience with Git and Agile/Scrum methodologies, Knowledge of testing, monitoring, logging, and AI evaluation practices 📃 Skills: Python, Java, Go, Kotlin, C#, TypeScript, FastAPI, REST, Microservices, LLM, RAG, Vector, SQL, NoSQL, AWS, Terraform, Git, Scrum, Kubernetes, Docker, CI/CD, Async, Serverless, Containers 🏢 Description: YOUR CONTRIBUTION Our culture is agile and collaborative, and we genuinely believe our people are some of the best with which you’ll ever work. We are looking for a skilled and passionate Senior AI Software Engineer – Backend to join our Centre of Excellence and the SWE team to design, build and scale production-grade AI services, intelligent workflows, and backend platforms that create measurable business value. YOUR “DAY-TO-DAY”: Design, develop and operate production-grade AI backend services, APIs, and event-driven components with strong focus on scalability, reliability, latency, and cost efficiency. Build and integrate capabilities based on LLMs and other AI services, including prompt orchestration, structured outputs, tool calling, and workflow automation. Develop retrieval and knowledge integration patterns such as RAG, vector search, and metadata-driven content pipelines for enterprise use cases. Participate and support Agile methods and frameworks by taking part in planning events, daily stand-ups, code reviews, and technical discussions. Collaborate closely with product, platform, frontend, DevOps, security, and data stakeholders as a valued member of a self-managing, cross-functional SWE team. Implement robust observability, evaluation and guardrails for AI solutions, including logging, tracing, monitoring, feedback loops and incident troubleshooting. Manage and optimize scalable distributed systems on the Cloud, using secure-by-design and infrastructure-as-code practices. Develop automated tests and evaluation suites to validate backend logic, model behavior, regression scenarios, and non-functional requirements. Translate product and business needs into reliable technical designs, reusable services, and maintainable integration patterns. Continuously improve architecture, developer experience, and engineering standards by contributing to best practices, reviews, and technical mentorship within the Backend community. BACKGROUND AND QUALIFICATIONS: Bachelor's Degree or higher in Computer Science, Software Engineering, Data Engineering, or related field, with appropriate professional experience. Proven work experience as a Backend Engineer or Software Engineer for 6+ years, with hands-on delivery of AI-enabled or data-intensive backend solutions. Strong experience with Agile delivery frameworks such as Scrum and modern source code management practices using Git. Knowledge of AI engineering patterns such as agentic workflows, semantic caching, prompt/version management, and human-in-the-loop controls. Strong proficiency in one or more backend languages such as Python, Java, Go, Kotlin, C#, or TypeScript, with production experience building APIs and services. Solid experience designing and operating backend services, microservices, and distributed systems, including RESTful APIs, asynchronous processing, and messaging patterns. Hands-on experience with Python-based AI/backend frameworks and service development patterns, such as FastAPI, async programming, data validation, and structured outputs. Experience integrating foundation model or cloud AI services and building reliable orchestration layers for prompts, tools, and model interactions. Good knowledge of data access patterns and storage technologies, including SQL and NoSQL databases, caching, and vector databases or semantic retrieval concepts. Experience with AWS cloud services and cloud-native engineering practices, including serverless, containers, observability, and infrastructure automation. Experience with Terraform or other infrastructure-as-code tooling. Knowledge of AI solution quality practices, including testing strategies, evaluation, monitoring, security, privacy, and responsible-use guardrails. Knowledgeable about software architecture, design patterns, logging, monitoring, and performance optimization. Excellent analytical and time management skills, strong teamwork mindset, and a pragmatic problem-solving attitude. Passionate about software engineering, continuous learning, and the practical adoption of emerging AI technologies. ADDITIONAL EXPERIENCE PREFERRED OR HELPFUL: Experience with cloud AI platforms and managed model services, preferably in AWS environments. Experience with Kubernetes, Docker containers, and CI/CD pipelines for deploying and operating AI-enabled services. Experience with product and collaboration tools such as Jira and Confluence. Summary: Senior AI Software Engineer – Backend Role in a nutshell: A senior backend engineer focused on building and scaling production-grade AI services — think LLM integrations, RAG pipelines, agentic workflows, and cloud infrastructure — within a collaborative, cross-functional team. Experience needed: 6+ years in backend/software engineering, with hands-on AI or data-intensive delivery. Must-have tech: Python (FastAPI, async), REST APIs, microservices, Terraform, AWS, SQL/NoSQL/vector databases, Git, Agile/Scrum. Nice to have: Kubernetes, Docker, CI/CD, Terraform, Jira/Confluence. Key soft skills: Strong communicator, team player, pragmatic problem-solver, passionate about AI and continuous learning. Degree: Computer Science, Software Engineering, or related field. The right candidate is someone who bridges solid backend engineering fundamentals with practical AI delivery experience — not just a data scientist or ML researcher, but an engineer who ships reliable, observable AI products in production.

🏢 Summary: Senior Software Engineer role focused on developing scalable backend services and AI-powered features using Scala and Python in an international team. The position includes designing production-grade systems, API integrations, architectural decision-making, and supporting CI/CD processes in a fully remote B2B setup. 🗂️ Requirements: 7+ years of professional software development experience, Production experience with Scala, Strong Python knowledge, Experience building production-grade backend services, Knowledge of software engineering best practices, Experience with automated testing, Experience with version control systems, Experience with code review, Experience with CI/CD, Ability to design scalable and maintainable architecture, Ability to solve complex technical problems independently, Experience working in international teams, Advanced Polish language skills, English level B2 📃 Skills: Scala, Python, AI, API, CI/CD, LLM, Elasticsearch, AWS, Azure, GCP, PHP 🏢 Description: Poszukujemy doświadczonego Senior Software Engineera do międzynarodowego zespołu rozwijającego nowoczesne rozwiązania backendowe oraz funkcjonalności wykorzystujące technologie AI. Scala jest jedną z kluczowych technologii wykorzystywanych w projekcie, a istotna część codziennego developmentu realizowana jest również w Pythonie. Praca obejmuje rozwój skalowalnych usług backendowych, tworzenie nowych funkcjonalności oraz integracje z rozwiązaniami AI i zewnętrznymi usługami poprzez API. Szukamy osoby z dużym doświadczeniem w tworzeniu systemów produkcyjnych, która swobodnie porusza się w Scali i Pythonie, potrafi samodzielnie rozwiązywać złożone problemy techniczne oraz aktywnie uczestniczyć w podejmowaniu decyzji architektonicznych. Zakres obowiązków - Tworzenie, utrzymanie i rozwijanie usług backendowych w Scali i Pythonie. - Projektowanie skalowalnych i łatwych w utrzymaniu rozwiązań. - Rozwój nowych funkcjonalności produktowych, w tym rozwiązań wykorzystujących AI. - Integracja systemów z zewnętrznymi usługami poprzez API. - Tworzenie czystego, testowalnego kodu produkcyjnego. - Udział w podejmowaniu decyzji architektonicznych oraz code review. - Dbanie o jakość, skalowalność, wydajność i bezpieczeństwo rozwijanych rozwiązań. - Wsparcie i rozwój procesów CI/CD. - Analiza oraz rozwiązywanie problemów występujących w środowisku produkcyjnym. - Współpraca w ramach międzynarodowego zespołu. Wymagania - Minimum 7 lat doświadczenia w profesjonalnym software development. - Bardzo dobre doświadczenie produkcyjne w Scali. - Dobra znajomość Pythona i doświadczenie w tworzeniu backendu klasy produkcyjnej. - Doświadczenie w projektowaniu i rozwijaniu usług backendowych. - Bardzo dobra znajomość dobrych praktyk software engineering. - Doświadczenie z testami automatycznymi, kontrolą wersji, code review oraz CI/CD. - Umiejętność projektowania skalowalnej i łatwej w utrzymaniu architektury. - Samodzielność w analizowaniu i rozwiązywaniu złożonych problemów technicznych. - Umiejętność efektywnej komunikacji i współpracy w międzynarodowym zespole. - Znajomość języka polskiego na poziomie zaawansowanym. - Znajomość języka angielskiego na poziomie B2. Mile widziane - Komercyjne doświadczenie z LLM lub generatywną AI. - Doświadczenie w integracji usług i modeli AI z systemami produkcyjnymi. - Integracje z zewnętrznymi platformami poprzez API. - Znajomość Elasticsearch. - Doświadczenie z rozwiązaniami chmurowymi (AWS, Azure lub GCP). - Znajomość PHP. - Doświadczenie w rozwoju skalowalnych systemów. - Wiedza z zakresu monitoringu, wydajności i optymalizacji kosztów infrastruktury. Oferujemy - kontrakt B2B - stawka: daj znać, jaki poziom Cię interesuje - praca zdalna - start projektu asap Proces rekrutacyjny - Screening - Rozmowa techniczna - Decyzja

🏢 Summary: Senior Backend Software Engineer role focused on building and maintaining backend services for mobile applications in a large-scale pet e-commerce platform. The position involves developing microservices, cloud-native solutions, CI/CD pipelines, and collaborating in Agile teams using modern DevOps practices. Candidates will work across the full software development lifecycle with technologies such as Python, AWS, Docker, Kubernetes, and Spring. 🗂️ Requirements: 6+ years of professional Python experience, Experience with Java, Experience with Spring, Strong understanding of complex software architectures, Experience with unit testing and TDD, Experience with DevOps tools and practices, Experience with CI/CD pipelines, Experience with AWS, Experience with Kubernetes, Ability to work across full software development lifecycle, Ability to mentor junior developers, Excellent communication skills, English proficiency 📃 Skills: Python, Java, Spring, AWS, Docker, Kubernetes, Terraform, Jenkins, InfluxDB, Grafana, ELK, S3, SNS, SQS, RDS, DynamoDB, Git, Scrum, TDD, CI/CD, Microservices 🏢 Description: Company Description With over 25 years’ experience, plus the same enormous passion and ambition we had on day-one, we’re trailblazers in the pet e-commerce industry. Our solutions make over 12 million customers genuinely happier – and that’s something we really care about. We work together to continually adapt; embracing change and the challenges it brings so that we can keep doing better. Join us and discover a place where your potential meets your passion for pets. That’s the power of plus. Job Description We are looking for a Senior Backend Software Engineer to join our Mobile Apps Team, bring new features to life, and support the evolution of our services and products. You will work closely with the product owner, area architect, and your team members to clarify business needs and technical requirements and define how to best support them. In close collaboration with other teams, your team will introduce new features and improvements to the mobile apps to provide an even better experience for more than 11 millions of our customers! As our Senior Backend Software Engineer: You will work with your Team and Product Owner in a challenging Agile environment, collaborating closely with other teams. You will participate in the team's technical/architectural discussions and decisions. You will develop and continuously deliver applications for one of Europe's most successful pet e-commerce platforms. You will participate in the complete software development life cycle from discovery through coding, testing, deployment, and maintenance. You will learn and grow your skills daily, striving for mastery using state-of-the-art technologies and practices such as AWS, Microservices, Docker, and more. At the Mobile Apps , our primary responsibility is the iOS and Android apps, including the services that power them. This includes all aspects of the customer journey, from onboarding, personalised home feed, wishlist, search and catalog to cart and checkout. As a rapidly growing channel, the Mobile Apps are crucial to the company's success. Here are several aspects of our team and work environment that contribute to a positive and fulfilling experience: We work in self-organised teams following Scrum methodology, respecting and valuing everyone´s opinion. We learn from each other and share knowledge through pair programming, code reviews, and many training opportunities. We deliver value by developing new features, maintaining existing products, and improving all the infrastructure we need, so we would also like to have a colleague who is cross-functional . We are committed to delivering high-quality products and believe that continuous delivery, clean code, and a DevOps mindset are key to achieving this goal. Our team values a friendly and collaborative environment , and we greatly encourage open communication and teamwork . We believe in a team approach and do not assign blame; instead, we work together to build and maintain the system. We embrace diversity, having colleagues from over 50 countries. This means our working language is English . These are some of the technologies/frameworks/practices we use: Python Java 11+, Spring framework CI/CD with Jenkins pipeline InfluxDB, Grafana, ELK stack Docker, Kubernetes Amazon Web Services and cloud deployments (S3, SNS, SQS, RDS, DynamoDB, etc.), using tools such as Terraform or AWS CLI Git, Scrum, Pair Programming, Peer Reviewing Your responsibilities Participate in solution investigation, estimations, planning, and alignment with other teams. Design, implement, deliver, and support backend solutions (restful web services) using micro-services architecture. Work closely with other teams to integrate their solutions into the mobile apps. Promote and implement test automation (e.g., unit tests, integration tests, e2e tests and performance tests) Build and maintain CI/CD pipelines for continuous integration, development, and deployment. Deploy applications on the cloud using technologies such as Docker, Kubernetes, AWS and Terraform. Work closely with the team in an agile and collaborative environment. This will involve code reviews, pair programming, knowledge sharing, and incident coordination. Maintain existing applications and reduce technical debt. Qualifications Must have: 6+ years of professional experience with Python; experience with Java and the Spring Framework is a plus. Strong understanding of complex architecture landscapes, with the ability to independently investigate and implement new features. Ownership mindset with a strong focus on delivering high-quality solutions; experience with unit testing and Test-Driven Development (TDD). Experience with DevOps tools and practices, including container orchestration, CI pipelines, monitoring and alerting, AWS, and Kubernetes. Interest in contributing across the full software development lifecycle (frontend, backend, testing, and DevOps). Ability to mentor junior colleagues and help structure and clarify requirements. Empathetic team player with the ability to build effective working relationships. Excellent verbal and written communication skills. Nice to have: Experience working within Agile practices and knowledge of Agile values & principles. Experience working with Microservices. Experience in the e-commerce domain. Experience with AI-assisted development and modern SDLC tooling: Tools like GitHub Copilot / Copilot Chat Applying AI for code generation, refactoring, test automation, and documentation Using AI to accelerate debugging, prototyping, and architectural decisions Additional Information Headquartered in Munich, with offices across Madrid, Krakow, Wroclaw, London and Vienna, we collaborate because we genuinely love working together - so you’ll be at the heart of an incredible, multinational team. We trust each other to get the job done, which means you’ll benefit from hybrid working, spending 60% of your time in the office and 40% at home. There’s an option to work for 20 days abroad in approved countries too. Add to that development opportunities that help you to shape your own career path, excellent training and support, wellbeing offers, subsidised transport or bike leasing, plus 20% discount across all our products, and you’ll begin to get a sense of what sets us apart. Find out more about the specific benefits at your local office in our blog posts . At zooplus, we believe in equal opportunity and support everyone to fulfil their potential. We recognise the power of listening and learning from each other and embrace diversity and inclusion of all. #LI-Hybrid

🏢 Summary: Senior Software Engineer role focused on designing and delivering new features and PoCs end-to-end on a large-scale SaaS and data platform. The position emphasizes backend development in Python, extending a mature system, and leveraging AI/LLM tools to accelerate development and improve engineering workflows. Fully remote with high ownership and impact on product direction. 🗂️ Requirements: 7+ years of Software Engineering experience, Strong experience with Python, Experience with Django, Experience building large-scale production systems, Experience designing and maintaining REST APIs, Strong understanding of distributed systems, Strong understanding of backend architecture, Daily practical use of AI tools and LLMs in development workflows, Experience with cloud environments, Ability to independently design and deliver end-to-end solutions, Professional English proficiency 📃 Skills: Python, Django, REST, API, SaaS, LLM, AI, Cloud, DistributedSystems, Backend 🏢 Description: Does building awesome, innovative products that add up to something meaningful sound like a dream come true? Come join us and make that vision a reality! About We are looking for a product-driven Senior Software Engineer who thrives in fast-paced environments and enjoys turning ideas into practical, user-focused solutions. In this role, you will independently design and deliver new features and PoC end-to-end on top of an existing large-scale SaaS and data platform. Rather than working in a purely greenfield environment, you will extend and evolve a mature platform with new capabilities, focusing on speed, usability, and real customer value. A key part of this role is the daily use of AI and LLM-based tools to accelerate development workflows, prototyping, research, testing, and delivery. We are looking for someone who not only uses AI tools effectively but also understands how to integrate AI reasoning and automation into modern software engineering practices. Responsibilities Independently design, prototype, and deliver new features and PoCs end-to-end Translate product ideas into scalable and user-focused backend solutions Validate technical feasibility and make pragmatic architectural decisions Use AI tools, coding copilots, and LLM-based workflows to accelerate development, experimentation, and delivery Build and maintain scalable backend services and REST APIs using Python (preferably Django) Collaborate closely with Product, Design, and Engineering teams to shape and refine new features Contribute to engineering quality through code reviews, technical guidance, and knowledge sharing Continuously explore and introduce practical AI-driven workflows that improve engineering productivity and delivery speed Our offer Competitive salary on B2B contract Fully remote position Real impact and independence at work Individual career path Work-life balance A non-corporate atmosphere where innovation, personal growth, and teamwork thrive 100+ smart, curious & ambitious engineers What you bring 7+ years of experience as a Software Engineer Strong experience with Python and preferably Django Experience building and maintaining large-scale production systems and REST APIs Strong understanding of distributed systems and modern backend architecture Demonstrated daily use of AI tools and LLMs in real engineering workflows (e.g. code generation, prototyping, refactoring, testing, documentation, automation) Experience integrating with complex platforms and cloud environments Ability to independently deliver solutions with minimal supervision Strong product mindset and focus on solving real user problems Excellent communication and collaboration skills across Product, Design, and Engineering teams Curiosity, ownership, and passion for learning and experimenting with new technologies Professional level of English Nice to Have Experience mentoring or coaching engineers Experience working with data products and related scalability challenges Experience promoting AI-driven engineering practices and helping teams adopt modern AI workflows Benefits International Projects Small Teams Flat Structure Friendly Atmosphere Flexible Hours Individual Career Path We want your TALENT! Don’t hesitate and APPLY! We are happy to tell you more details about this position in a phone call. Our recruitment process is very fast and straightforward to ensure a great experience from the first interview to joining your dream team!

🏢 Summary: Senior Backend Python Engineer role focused on building scalable AI-powered enterprise software and owning backend services from architecture to production. The position involves backend development, distributed systems, cloud infrastructure, and technical leadership in a hybrid B2B environment. Candidates will collaborate across teams to deliver secure, high-performance applications using modern engineering and AI-assisted workflows. 🗂️ Requirements: 6+ years building production-grade backend systems, Strong Python experience, Experience with distributed systems, Knowledge of concurrency and asynchronous processing, Experience designing REST APIs, Experience with scalable architectures, Hands-on cloud platform experience, Database design and performance optimization knowledge, Experience building secure enterprise applications, Ability to own projects from design to deployment, Cross-functional collaboration skills, Strong troubleshooting and problem-solving skills, Excellent English communication skills, Experience with AI tooling and automation workflows 📃 Skills: Python, REST, AWS, GCP, Azure, SQL, TypeScript, LLM, AI, Monitoring, Logging, Observability, Automation 🏢 Description: Senior Backend Engineer (Python) 📍 Warsaw, Poland (Hybrid) ☑️ Full-time 🕦 B2B Contract 💰 $8.000 - $12.000/month We are hiring a Senior Backend Python Engineer for an innovative technology company building AI-powered enterprise software used by organizations worldwide. This role is ideal for an experienced backend engineer who enjoys designing scalable production systems, solving complex technical challenges, and taking ownership of critical backend services from architecture through production. You'll work closely with product, frontend, and platform engineers to build reliable, secure, and high-performance applications while leveraging modern AI-assisted engineering practices . As a Senior Backend Python Engineer you will provide backend development, system design, cloud infrastructure, and technical leadership in a fast-paced engineering environment where ownership and continuous improvement are highly valued. Requirements 6+ years of experience building and maintaining production-grade backend systems Strong hands-on experience with Python and modern backend development practices Strong understanding of distributed systems, concurrency, asynchronous processing, and scalable architectures Experience designing and developing REST APIs and backend services Hands-on experience with cloud platforms such as AWS, GCP, or Azure Strong knowledge of database design, performance optimization, and high-throughput applications Experience building secure, reliable enterprise applications with a security-first mindset Ability to own projects from technical design through deployment and production support Experience working closely with cross-functional engineering and product teams Strong troubleshooting, problem-solving, and communication skills Excellent written and verbal English communication skills Improve engineering leverage with AI tooling , automation, and internal workflows rather than using AI as a gimmick Nice to Have Experience building AI-powered applications, agentic systems, LLM integrations, or orchestration frameworks Experience with TypeScript or full-stack development Experience mentoring engineers or contributing to technical leadership Experience with observability, monitoring, logging, and performance optimization Experience working in fast-growing product or startup environments Responsibilities Design, develop, and maintain scalable backend services, APIs, and asynchronous processing systems Translate business requirements into robust technical solutions and scalable system designs Own services throughout their lifecycle, including deployment, monitoring, reliability, and continuous improvement Design efficient data models and optimize database performance for production workloads Collaborate with product, frontend, and platform teams to deliver end-to-end features Improve engineering productivity through automation and AI-assisted development workflows Participate in architecture discussions, code reviews, and technical decision-making Implement monitoring, logging, and observability solutions to ensure production reliability Continuously improve system scalability, performance, security, and maintainability Contribute to engineering best practices and knowledge sharing across the team

🏢 Summary: Senior Backend Engineer responsible for designing, building, and maintaining production-grade backend systems that power AI-driven business automation. The role covers full ownership from system design to deployment, focusing on scalable, reliable distributed systems and cloud infrastructure. This is a Warsaw-based, office role with strong emphasis on technical leadership and AI-supported development workflows. 🗂️ Requirements: Senior-level experience in backend engineering on production systems, Strong Python programming skills, Experience with distributed systems concepts, Experience with cloud platforms (AWS, Azure, or similar), Knowledge of SQL and NoSQL databases, Ability to design, implement, and deliver systems to production, Strong written and spoken communication skills, Regular use of AI tools in development workflows 📃 Skills: Python, AWS, Azure, SQL, NoSQL, DistributedSystems, Concurrency, AsynchronousProcessing, APIs, Cloud, GitHubCopilot, OpenAI, Claude, TypeScript 🏢 Description: About Us Many companies want to use AI agents, but these agents often struggle with real business tasks. We solve this problem by building a platform that helps AI understand business rules, workflows, and processes. This allows AI to make better decisions and provide accurate, reliable, and compliant results. Well-known companies from different industries use our technology to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that used to take hours in just seconds. We also work with leading technology partners and have been recognized for our innovative approach. Our goal is to help people everywhere get better answers through AI. Job Description We are looking for a Senior Backend Engineer who can take ownership of important systems instead of only completing assigned tasks. You will solve complex problems, design backend solutions, build them, and make sure they run well in production. We want someone with strong technical skills, good communication, and the ability to create simple, reliable, and easy-to-maintain systems. This is a product engineering role with responsibility from system design to production. The position is based in Warsaw and requires office work. Responsibilities Design and develop backend services, APIs, data processing, and background tasks for production systems. Turn unclear business needs into clear technical plans and practical solutions. Maintain services after release by improving reliability, monitoring, performance, and fixing issues. Make good decisions about system architecture, data models, interfaces, and future scaling. Write technical documentation, architecture notes, and diagrams when they help the team. Work closely with product managers, frontend engineers, and platform engineers to deliver complete solutions. Improve development processes using AI tools, automation, and internal workflows. Support the team through code reviews, design reviews, and practical technical leadership. Requirements Strong experience as a senior backend engineer working on production systems. Excellent Python skills and the ability to write clean and maintainable code. Good understanding of distributed systems, including concurrency, failure handling, data consistency, asynchronous processing, and service design. Experience with cloud platforms such as AWS, Azure, or similar services. Knowledge of SQL, NoSQL databases, schema design, and performance optimization. Ability to take a project from an idea through design and implementation to production. Strong written and spoken communication skills with the ability to explain technical topics clearly. Regular use of AI tools in everyday development and interest in improving AI-based workflows. Nice to Have Experience with LLM-based applications, search systems, AI infrastructure, or large data pipelines. Knowledge of TypeScript or the ability to contribute to frontend development when needed. Experience guiding other engineers and influencing technical decisions without being a formal manager. What We Offer B2B contract and company stock options. MacBook Pro for work. Modern technology stack and opportunities to contribute to open-source projects. Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP servers. Our Culture and Values Our leadership team has strong experience in AI and knowledge management. We have secured more than $60 million in funding and achieved three years of continuous 3x growth. Our work is based on these values: Quality – We aim for excellent work and high coding standards. Momentum – We take initiative and keep projects moving forward. Accountability – We take responsibility and give honest, respectful feedback. Hard Work – We believe great results come from teamwork and consistent effort. Learning Agility – We stay curious, learn from mistakes, and improve every day. Adapt and Thrive – We accept change and see challenges as opportunities. Win Together – We succeed as one team through honesty, openness, and support for our shared mission.

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend systems for a modern accounting platform. The position involves designing distributed services, building high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to develop agentic systems and scalable data pipelines. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing, building, and operating production backend systems at scale, Strong expertise in API design, Strong expertise in data modelling, Deep understanding of distributed systems trade-offs, Hands-on experience with AWS or GCP in production, Practical experience with CI/CD in high-frequency deployment environments, Experience implementing testing and deployment strategies, Strong knowledge of observability practices, Experience participating in on-call rotations 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems 🏢 Description: ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Senior Backend Engineer role focused on building and scaling backend systems for an AI-driven product that transforms complex government data into actionable insights. The position involves designing data ingestion, processing pipelines, and distributed infrastructure from scratch, with full ownership from architecture to production. You will work closely with a small senior team to deliver scalable, production-ready systems. 🗂️ Requirements: 6+ years of Backend Engineering experience, Experience in JVM ecosystem, Experience in product companies (B2B SaaS preferred), Experience designing and owning backend systems in production, Strong knowledge of system design and scalability, Experience building asynchronous or distributed systems, Ability to make and justify technical decisions, Fluency in English, Valid work authorization in Europe or LATAM 📃 Skills: Kotlin, Java, JVM, SQL, GCP, Messaging, Queues, DistributedSystems, SystemDesign, DataPipelines, LLMs, AI 🏢 Description: About the role We’re looking for a Senior Backend Engineer to join our early team and help build our product from zero to one. You’ll work on a product that helps companies navigate complex government data, from contracts and grants to market signals and turn it into actionable insights using AI. On the backend side, this means working on data ingestion, processing, and the infrastructure that powers search and AI-driven workflows at scale. You’ll collaborate closely with a small, senior team and have real ownership, from shaping solutions to shipping them to production and improving them over time. You might be a fit if you: Must have: 6+ years of experience as a Backend Engineer, preferably in the JVM ecosystem (we use Kotlin on the backend) Experience working in product companies (B2B SaaS preferred) with direct impact on shipped features Experience working in small companies or startups would be a strong advantage Experience designing and owning backend systems in production (from initial design to deployment and ongoing improvements) Strong understanding of system design, including scalability, failure handling, and trade-offs Experience building asynchronous or distributed systems (e.g. messaging, queues, event-driven systems) Ability to make and justify technical decisions, not just implement given solutions Fluency in written and spoken English Nice to have: Experience with large-scale data processing, scraping, or data pipelines Experience working with LLMs / AI-related systems Experience with GCP or similar cloud environments How We Work Build Bridges to Help Customers Win - We pride ourselves on being obsessively customer-centric. Shooting Star Speed - We move with extreme speed. We value momentum, decisiveness, and the ability to accelerate when it matters. Fun Is a Feature - Fun is a Feature means we intentionally design Starbridge to be an energizing place to do hard work. Joy, humor, and camaraderie make great teams faster, sharper, and more resilient. In the Arena - We believe the best ideas come from living close to the work, feeling the friction, hearing the nuance, and experiencing the details firsthand. Benefits include: Competitive salary + early-stage equity Unlimited PTO Regular off-sites (NYC + global locations) Interview Process We move fast — really fast. Getting back to someone today beats tomorrow, and our interview process reflects that mindset. Please keep us posted on your timeline so we can move quickly and speed things up where needed. After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 30-minute interview during which a member of our team will make sure you're a good fit for the role. You will have the opportunity ask questions and learn more about the role as well. We'll then send you a programming challenge that consists of two parts: LeetCode and SQL. Beyond that step, you will enter the main process, which consists of three interviews: System design exercise hands-on. Live coding in Java/Kotlin. Product thinking and past work. All interviews will be conducted via Google Meet. Eligibility to Work in Europe or LATAM: Candidates must hold valid authorization to work in the country where they will be based. At this time, we are unable to offer visa sponsorship or assist with work permit applications.