Senior Software Engineer Java, Kotlin (All Genders)

🏢 Summary: Senior Software Engineer role focused on designing, developing, and maintaining scalable e-commerce applications using Kotlin/Java and Spring. The position involves owning architecture, performance, and code quality while contributing hands-on to backend development. Hybrid work model in Warsaw with a strong emphasis on technical leadership and modern engineering practices. 🗂️ Requirements: 5+ years of professional software development experience, Strong proficiency in Kotlin or Java, Experience with Spring framework, Experience building and maintaining production systems, Ability to design scalable and high-performance architectures, Practical knowledge of Agile and DevOps principles, Experience contributing to code reviews and technical documentation 📃 Skills: Kotlin, Java, Spring, AWS, Agile, DevOps, REST, Microservices, Git, SQL 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. As a Senior Software Engineer , you will be a key member of a cross-functional team, responsible for designing, developing, and maintaining scalable e-commerce applications. You will leverage your expertise in Kotlin to deliver high-quality, efficient, and reliable solutions. Additionally, you will share your knowledge with team members and contribute to the technical standards of the projects. Key takeaways: Stack: Kotlin/Java, Spring, nice to have: AWS Salary: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location: ul. Grzybowska, Warsaw Recruitment process : A call with MOTIFE Recruiter Panel interviews with the team (coding, architecture and cross-collaboration interviews) Responsibilities: Technical Ownership Own the architecture, scalability, and performance of e-commerce applications as a senior technical expert. Design and develop clean, maintainable, and high-performance systems following best practices. Contribute directly to the codebase and actively participate in technical discussions, proposing robust solutions. Cross-Functional Collaboration Work closely with Product, Design, UX, and Program Management to deliver roadmap objectives. Help identify dependencies and remove technical blockers across engineering and partner teams. Culture & Continuous Improvement Promote engineering efficiency through automation, reuse, and modern design patterns. Support defining and analysing technical KPIs that contribute to continuous improvement. Champion code quality through code reviews, technical documentation, and knowledge-sharing activities. Requirements: Technical Expertise 5+ years of professional software development experience with production systems. Strong proficiency in Java or Kotlin and modern backend development ecosystems. Solid understanding of agile, lean, and DevOps principles and their practical application. Collaboration & Communication Strong interpersonal skills with empathy for engineers, customers, and stakeholders. Excellent communication skills, with fluent English, enabling clarity and alignment across teams. Passion for technology, elegant code, and innovative problem-solving. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro

🏢 Summary: Senior Software Engineer role focused on designing, developing, and maintaining scalable e-commerce applications using Kotlin/Java and Spring in a hybrid model in Warsaw. The position involves technical ownership of architecture and performance, close cross-functional collaboration, and driving engineering best practices. Offer includes competitive salary on an employment contract and comprehensive benefits. 🗂️ Requirements: 5+ years of professional software development experience with production systems, Proficiency in Java or Kotlin, Experience with modern backend development ecosystems, Understanding of agile, lean, and DevOps principles, Ability to design scalable and high-performance architectures, Fluent English 📃 Skills: Kotlin, Java, Spring, AWS, DevOps, Agile 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. As a Senior Software Engineer , you will be a key member of a cross-functional team, responsible for designing, developing, and maintaining scalable e-commerce applications. You will leverage your expertise in Kotlin to deliver high-quality, efficient, and reliable solutions. Additionally, you will share your knowledge with team members and contribute to the technical standards of the projects. Key takeaways: Stack: Kotlin/Java, Spring, nice to have: AWS Salary: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location: ul. Grzybowska, Warsaw Recruitment process : A call with MOTIFE Recruiter Panel interviews with the team (coding, architecture and cross-collaboration interviews) Responsibilities: Technical Ownership Own the architecture, scalability, and performance of e-commerce applications as a senior technical expert. Design and develop clean, maintainable, and high-performance systems following best practices. Contribute directly to the codebase and actively participate in technical discussions, proposing robust solutions. Cross-Functional Collaboration Work closely with Product, Design, UX, and Program Management to deliver roadmap objectives. Help identify dependencies and remove technical blockers across engineering and partner teams. Culture & Continuous Improvement Promote engineering efficiency through automation, reuse, and modern design patterns. Support defining and analysing technical KPIs that contribute to continuous improvement. Champion code quality through code reviews, technical documentation, and knowledge-sharing activities. Requirements: Technical Expertise 5+ years of professional software development experience with production systems. Strong proficiency in Java or Kotlin and modern backend development ecosystems. Solid understanding of agile, lean, and DevOps principles and their practical application. Collaboration & Communication Strong interpersonal skills with empathy for engineers, customers, and stakeholders. Excellent communication skills, with fluent English, enabling clarity and alignment across teams. Passion for technology, elegant code, and innovative problem-solving. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro

🏢 Summary: Senior Software Engineer role focused on designing, developing, and maintaining scalable e-commerce applications using Kotlin/Java and Spring. The position involves technical ownership of architecture, performance, and code quality within a cross-functional team. The engineer contributes directly to the codebase and drives best practices, automation, and continuous improvement. 🗂️ Requirements: 5+ years of professional software development experience with production systems, Strong proficiency in Kotlin or Java, Experience with Spring framework, Experience designing scalable and high-performance backend systems, Practical knowledge of Agile, Lean, and DevOps principles, Experience working on e-commerce applications, Fluent English 📃 Skills: Kotlin, Java, Spring, AWS, DevOps, Agile, Architecture, E-commerce 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. As a Senior Software Engineer , you will be a key member of a cross-functional team, responsible for designing, developing, and maintaining scalable e-commerce applications. You will leverage your expertise in Kotlin to deliver high-quality, efficient, and reliable solutions. Additionally, you will share your knowledge with team members and contribute to the technical standards of the projects. Key takeaways: Stack: Kotlin/Java, Spring, nice to have: AWS Salary: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location: ul. Grzybowska, Warsaw Recruitment process : A call with MOTIFE Recruiter Panel interviews with the team (coding, architecture and cross-collaboration interviews) Responsibilities: Technical Ownership Own the architecture, scalability, and performance of e-commerce applications as a senior technical expert. Design and develop clean, maintainable, and high-performance systems following best practices. Contribute directly to the codebase and actively participate in technical discussions, proposing robust solutions. Cross-Functional Collaboration Work closely with Product, Design, UX, and Program Management to deliver roadmap objectives. Help identify dependencies and remove technical blockers across engineering and partner teams. Culture & Continuous Improvement Promote engineering efficiency through automation, reuse, and modern design patterns. Support defining and analysing technical KPIs that contribute to continuous improvement. Champion code quality through code reviews, technical documentation, and knowledge-sharing activities. Requirements: Technical Expertise 5+ years of professional software development experience with production systems. Strong proficiency in Java or Kotlin and modern backend development ecosystems. Solid understanding of agile, lean, and DevOps principles and their practical application. Collaboration & Communication Strong interpersonal skills with empathy for engineers, customers, and stakeholders. Excellent communication skills, with fluent English, enabling clarity and alignment across teams. Passion for technology, elegant code, and innovative problem-solving. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro

🏢 Summary: Senior Backend Engineer role focused on designing and delivering a greenfield Loyalty Platform using Java and Spring, working across the full software development lifecycle in a hybrid model. The position involves shaping backend architecture, building scalable distributed services, and ensuring production readiness in AWS environments. 🗂️ Requirements: Extensive experience in backend development with Java, Commercial experience with Kotlin, Strong knowledge of Spring framework, Experience designing scalable and maintainable distributed systems, Hands-on experience with AWS environments, Experience with automated testing and continuous integration, Ability to work in Agile cross-functional teams, Fluent English (written and spoken) 📃 Skills: Java, Kotlin, Spring, AWS, CI, Testing, Microservices, DistributedSystems, REST, Git 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Java/Kotlin) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be working across the full software development lifecycle and contributing to the design and delivery of a greenfield Loyalty Platform built using Java and the Spring ecosystem. In this role, you will help shape the core backend services that power our loyalty capabilities, working closely with product managers, engineers, and other stakeholders to turn ideas into scalable, high-quality solutions. You will be involved from early design and architectural decisions through to implementation and production readiness. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Build and evolve backend components that form the core of a new Loyalty Platform, using Java and Spring. Lead the delivery of backend solutions, contributing from early technical discovery through implementation and live operation. Work closely with product and engineering partners to shape requirements and turn them into robust, scalable services. Influence platform architecture and technical standards as the system is being designed and grown from the ground up. Maintain a strong focus on code quality, reliability, and performance through testing, reviews, and continuous refinement. Support modern delivery practices, including continuous integration, automated deployments, and iterative releases. Ensure services are resilient and operable in production, with appropriate logging, monitoring, and support processes in place. Act as a senior technical contributor within the team, sharing knowledge, supporting less experienced engineers, and raising the overall engineering bar. What you'll bring Extensive hands-on experience delivering backend solutions in Java, with exposure to Kotlin in commercial or production settings. Strong practical knowledge of the Spring framework, with the ability to apply common design patterns to solve complex engineering problems. Experience designing backend systems with scalability and maintainability in mind, including service-based and distributed architectures. Practical experience working in AWS environments, covering application deployment, configuration, and day-to-day operation. Familiarity with modern software delivery approaches, such as automated testing, continuous integration, and incremental releases. Confidence contributing to technical discussions and shaping implementation approaches, particularly in early-stage or greenfield projects. A pragmatic engineering mindset, balancing clean design with delivery, performance, and operational considerations. Strong collaboration skills and experience working within Agile, cross-disciplinary teams. Excellent command of English (written and spoken) Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Design and develop high-performance, cloud-native backend systems powering large-scale search and recommendation services. Work in an autonomous team owning microservices end-to-end in a distributed, real-time marketplace environment. Solve complex challenges in data streaming, search optimization, and machine learning at massive scale. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience with backend development, Understanding of distributed systems, Experience with microservices architecture, Ability to design high-performance systems, English B2 level or higher, Participation in code reviews, Ownership of services from design to deployment 📃 Skills: Java, Kotlin, Spring, Kafka, Kubernetes, Vespa, Lucene, Solr, Docker, Consul, GitHub, GitHubActions, Microservices, DistributedSystems, MachineLearning, LLM, LoRA, PEFT, LangChain, AutoGen, CrewAI 🏢 Description: Senior Software Engineer (Java / Kotlin) Location: Poznań, PL, 61-569 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee About the job Massive Scale : Design, build, and optimize systems that handle thousands of requests per second. This is high-availability, high-performance engineering in practice. Modern Tech Stack : Work with a world-class, cloud-native environment. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. On the back side, there is Vespa and a highly optimized and heavily customized Lucene/Solr installation. We're not shy when it comes to ML too :) True Ownership & Autonomy : We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment; and improvements are dictated by results of our own experiments. Complex Challenges : From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace. And a constantly modernizing approach to search solutions will give you the opportunity to work with advanced embedding and ranking models and pipelines. In our domain we focus on delivering search results for multiple Allegro services, from search result pages, to recommendations, to offers comparisons in various placements. We maintain a critical entry point for users’ search experience through a huge catalog of products and offers, striving for relevancy first. To deliver, we are designing, implementing and operating an extensive system combining modern microservice architecture with high performance backends and vast data sources. We care about data quality and availability and strive for near real-time accuracy, to best guide users to products and offers in a highly dynamic marketplace. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 18 400 - 25 450 Annual bonus based on your annual performance and company results. Long term discretionary incentive plan based on Allegro.eu shares (restricted stock units). Our team is based in Poznań. We are looking for people who: Code in Kotlin or Java ; Expect work that requires creative approach to search experience challenges, to be proud of enjoying its results together with all Allegro users; Want to create solid code, eagerly accept comments and share knowledge during code reviews; Can look for effective solutions to the requirements set by users; Want to constantly develop and update their knowledge; Know English at at least B2 level. Nice to have: You are open to diverse technologies and workflows, including dev-operational tools on one hand, and working with data on the other. Basic experience with LLM tuning (LoRA, PEFT), training and evaluation pipelines for models and/or basic frameworks for building AI Agents (LangChain, AutoGen, CrewAI) would be great! What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Engineering role focused on building secure, scalable payment solutions in a microservices environment using Java and cloud technologies. The position involves full stack development, architecture contribution, and collaboration across product and engineering teams to improve performance, reliability, and developer experience. 🗂️ Requirements: Experience building modern software applications at scale, Knowledge of Java, Experience with Spring-based development, Familiarity with cloud platforms, Understanding of CI/CD pipelines, Experience with distributed systems, Ability to write clean and maintainable code, Collaborative mindset, Ownership of features from concept to production 📃 Skills: Java, Spring, AWS, Docker, Kubernetes, Terraform, PostgreSQL, Oracle, Jenkins, Prometheus, Grafana, ELK, 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 Join our Payments Team and help shape secure, scalable payment experiences used by millions of customers every day. This is a high-impact engineering role at the centre of the customer journey, where performance, reliability, and user experience truly matter. We’re looking for an experienced engineer who enjoys solving complex problems, collaborating across teams, and building modern applications at scale. While this is a full stack role, we welcome candidates with either stronger backend or frontend experience who are excited to work across the stack. What You’ll Do Build and evolve scalable payment solutions within a microservices environment Take ownership of features from idea to production Contribute to architecture and technical decision-making Partner closely with product, engineering, and platform teams Improve performance, reliability, and developer experience Write clean, maintainable, and well-tested code How We Work Agile, collaborative teams with high ownership “You build it, you run it” mindset Code reviews, and knowledge sharing Continuous improvement in both technology and ways of working Tech Stack: Java 17+, Spring Boot,, AWS, Docker, Kubernetes, Terraform, PostgreSQL, Oracle, Jenkins, Prometheus, Grafana, ELK Qualifications What You Bring Experience building modern software applications at scale Good knowledge of Java and Spring-based development Familiarity with cloud platforms, CI/CD, and distributed systems Passion for clean architecture and quality engineering practices Collaborative mindset with a sense of ownership and curiosity Nice to Have Experience in payments or e-commerce environments Exposure to observability and monitoring tools Interest in AI-assisted development tools such as GitHub Copilot Don’t meet every requirement? We’d still love to hear from you. We value potential, mindset, and engineering fundamentals as much as direct experience. 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 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: Full-time Senior Java Engineer role in a hybrid model (3 days/week in Kraków) focused on designing and delivering microservices-based solutions in a large-scale retail environment. The position involves leading technical strategy, implementing high-quality Java 21 and Spring Boot solutions in Azure cloud, and collaborating across teams in an Agile setup with on-call rotation. 🗂️ Requirements: 6+ years of experience in JVM ecosystem, Strong knowledge of Java and Spring Boot, Experience with microservices architecture, Experience with Azure and Kubernetes (AKS), Experience with PostgreSQL, Experience with CI/CD pipelines, Knowledge of Terraform, Experience with event-driven architecture, Fluent English, Availability to work hybrid (3 days/week in Kraków office), Willingness to participate in on-call rotation 📃 Skills: Java, Spring, Azure, AKS, Kubernetes, Terraform, Microservices, DDD, EventSourcing, PostgreSQL, GitHub, GitHubActions, ArgoCD, Splunk, Spock, JIRA, Zendesk, Miro 🏢 Description: Svitla Systems Inc. is looking for a Senior Java Engineer for a full-time position (40 hours per week) in Poland (Kraków and its immediate surroundings). Our client is one of the world's largest food retailers, operating thousands of stores across the United Kingdom, Ireland, and Europe. The hybrid mode of work includes 3 days/week at the Krakow office (this is essential as the role involves working with other team members). On-Call duties (rotating shifts). Tech Stack: Languages: Java 21; Frameworks: Spring Boot; Cloud: Azure (AKS/Kubernetes), Terraform; Architecture: Microservices, DDD, Event Sourcing; DB: PostgreSQL; CI/CD: GitHub Actions + ArgoCD; Monitoring & alerting: Splunk; Testing: Spock; VCS: GitHub; Others include Zendesk, JIRA, and Miro. Requirements: 6+ years of experience as a Software Engineer within the JVM ecosystem. Strong understanding of language & framework, and a good working knowledge of the abstraction layer underneath The ability to showcase exemplary behaviour in your work – your design, delivery, code, processes all sets examples for your team. Fluent communication skills in English. Responsibilities: Work in an Agile environment. Take a business problem and develop a technical strategy within the team, along with a high-level design, and lead the implementation. Work under minimal directions or guidance and collaborate with SDEs across teams working on the same or similar business problems. Influence your team’s technical and business strategy by suggesting novel approaches. Proactively mentor the rest of the team and help with hiring. Communicate your ideas and get feedback from different stakeholders. Drive convergence to achieve the proper outcomes. Ensure that design or architectural deficiencies are addressed, and routinely simplify the integration of your peer teams' software with your team’s software. Consistently lead the delivery of valuable features. Continually propose and drive process improvements. Help elaborate on requirements where necessary. We offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in the workspace, either remote or in our welcoming office. Comprehensive medical insurance after one month. MultiSport card with access to 2500 sports facilities all over Poland Bonuses for recommendations of new employees. Bonuses for article writing, public talks, and other activities. 15 vacation days, 10 national holidays, 10 sick leaves, and family days off. Personalized learning program tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Welcome and anniversary presents, gifts for children, and more. Regular corporate events and meetups. Awesome team, friendly and supportive community!

🏢 Summary: Senior Software Engineer role focused on designing and optimizing high-availability, high-performance microservices in a cloud-native environment at massive scale. The position involves full ownership of backend services, working with Java/Kotlin, Big Data workflows, and distributed systems powering a real-time marketplace. You will build, deploy, and maintain scalable systems handling thousands of requests per minute. 🗂️ Requirements: Proficiency in Java or Kotlin, Willingness to work with Kotlin in production, Experience with microservices architecture, Experience with cloud environments, Knowledge of distributed systems, Experience with Big Data workflows, Ability to work with Airflow and BigQuery, Understanding of scalable and resilient system design, Ability to take end-to-end ownership of services, English level B2 or higher 📃 Skills: Java, Kotlin, Spring, MongoDB, Microservices, GCP, React, Airflow, BigQuery, Kubernetes, Docker, Consul, GitHub, GitHubActions 🏢 Description: Senior Software Engineer Location: Kraków, PL, 31-503 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee About the job Massive Scale : Design, build, and optimize systems that handle thousands of requests per minute. This is high-availability, high-performance engineering in practice. Modern Tech Stack : Work with a world-class, cloud-native environment (GCP). Our core technologies include Java, Kotlin, Spring, MongoDB, microservices, React, Airflow (BigData). True Ownership & Autonomy : We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment. Complex Challenges : From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace. About us We are the team behind Allegro Prices - one of our most important pricing programs. As part of the Competitive Price unit, we build its logic and grow its reach to keep our prices competitive. Our main goal is to ensure great deals on the products that shoppers actually look for. We do this at scale using full automation and data from many different sources Important things for you Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 9:30 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 18 400 - 25 450 Annual bonus based on your annual performance and company results. Our team is based in Kraków and Warsaw. We are looking for people who: Code in Kotlin or Java and are excited to master Kotlin in a production environment. Are open to diverse technologies , including Frontend. You don’t need to be a React master, but you’re ready to mentor Frontend engineers on architectural patterns and help build a truly cross-functional team. Want to grow into Big Data , learning how to handle large-scale datasets and build workflows with Airflow and BigQuery . Want to be proud of the code they create ; they value high-quality code reviews and engage in substantive discussions on software engineering best practices; Feel comfortable interacting with stakeholders and taking full end-to-end ownership of initiatives - from initial requirements gathering through implementation to post-deployment monitoring; Have a solid foundation in microservices architecture and feel at home working in cloud environments , understanding how to build scalable and resilient systems; Know English at at least B2 level. What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Software/DevOps Engineer role focused on developing and maintaining internal developer tools and infrastructure that power the software delivery lifecycle. The position combines Java/Kotlin microservices development with large-scale Linux system administration, CI/CD optimization, and infrastructure automation. You will improve and scale platform solutions used by hundreds of engineers across the organization. 🗂️ Requirements: Proficiency in Java and/or Kotlin, Strong Linux system administration skills, Experience with CI/CD pipelines and GitHub, Experience with automation and Infrastructure as Code, Knowledge of containerization and orchestration concepts, Ability to manage systems at scale, English proficiency at B2+ level 📃 Skills: Java, Kotlin, Linux, GitHub, CI/CD, Ansible, IaC, Kubernetes, Docker, Consul, MongoDB 🏢 Description: Software Engineer 2 (Java / Kotlin) - Platform Team Location: Poznań, PL, 61-569 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee Important things for you Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 200 - 20 200 Annual bonus based on your annual performance and company results. Our team is based in Poznań. About the job Allegro’s development teams boast more than 1700 IT experts solving problems at a unique scale and complexity. However, if you join us, you’ll be joining a specific team that operates like a small, agile startup within our large organization. Our team is strongly Developer Experience (DevEx) driven, focusing on the core tools and components  that powers Allegro's software delivery lifecycle. We maintain the very heartbeat of our development process: from managing a massive selfhosted runners cluster and administrating Github enterprise to building tools that define how we build and release code. We are looking for a Software/DevOps Engineer who enjoys the intersection of software engineering and infrastructure, ensuring that our SDLC is fast, reliable, and scalable. We are a versatile team with diverse competencies, handling everything from our own Java/Kotlin microservices (backed by MongoDB ) to maintaining a central library that serves as the essential bridge between developers and our infrastructure. We are passionate about our internal users - the dozens of engineers who rely on our tools every day - and we work closely with them to ensure that CI/CD processes , from the first line of code  to final deployment, are a seamless experience. You’ll be joining a group where you can have a direct, daily impact on how hundreds of releases are handled across the company. We are looking for people who: Code in Java and / or Kotlin Are proficient in Linux and feel at home managing systems that operate at a massive scale Expect work that has a deeper meaning (not only tasks "management has commissioned") and want to enjoy its results Want to be proud of the code they create. They eagerly accept comments and share knowledge during code reviews Believe that "manual" is a bug – you automate everything (ex. using Ansible) and follow the Infrastructure as Code (IaC) philosophy Can look for effective solutions that solve business and technical challenges Can navigate GitHub and know how to build efficient, developer-friendly environments for  CI/CD pipelines Want to expand their skills into containerization and orchestration to help us build even more portable and resilient systems Want to constantly develop and update their knowledge, not only regarding software, but also in other domains like Big Data depending on clients needs Know English at B2+ level What’s in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!