Backend Engineer (PHP; 100% remote)

🏢 Summary: Full-time remote Revenue Operations Engineer role focused on building and maintaining a Next.js-based marketing website and integrating SaaS, CRM, and billing systems across the revenue stack. The position combines web engineering with automation and GTM tooling, ensuring secure, scalable, and performant customer lifecycle integrations. The engineer will own website performance, security, and data flows from lead capture to billing. 🗂️ Requirements: 3+ years of software engineering experience with web applications or SaaS integrations, Strong proficiency in JavaScript, React, and Next.js, Solid knowledge of HTML, CSS, accessibility, and responsive design, Experience integrating SaaS tools using workflow orchestrators (e.g. N8N), Hands-on experience with CRM and subscription billing platforms, APIs and webhooks, Experience building and deploying serverless or cloud functions, Understanding of authentication, authorization, and secrets management, Experience working with REST/JSON APIs and asynchronous data flows, Familiarity with component libraries or design systems 📃 Skills: JavaScript, React, Next.js, HTML, CSS, N8N, CRM, APIs, Webhooks, REST, JSON, Serverless, GoogleCloud, CloudRun, Authentication, Authorization, Storybook 🏢 Description: 💰 Salary: €4000 - €5,500 per month, depending on experience 🕦 Full-time ☑️ EOR 🌴 Remote We are looking for a Revenue Operations Engineer to join a fast-growing open-source cybersecurity company's engineering team. The role sits at the crossroads of web engineering and go-to-market tooling, owning both the public-facing website and the integrations that power the revenue and customer lifecycle stack. Requirements 3+ years of hands-on software engineering experience with web applications and/or SaaS integrations Strong proficiency in JavaScript, React, and Next.js Solid command of HTML and CSS, semantics, accessibility, and responsive design Proven experience connecting SaaS tools through workflow orchestrators (e.g. N8N or equivalent) Hands-on experience with CRM platforms, subscription billing tools, and their APIs and webhook systems Comfortable building and deploying serverless or cloud functions (e.g. Google Cloud Functions, Cloud Run, or similar) Strong grasp of web security fundamentals — authentication, authorization, and secrets management Experience working with REST/JSON APIs and asynchronous data flows Familiarity with component libraries or design systems (e.g. Storybook) Key Responsibilities Build and maintain a marketing and documentation website built on Next.js, translating design specs into production-ready React components Ensure all public-facing pages meet high standards for performance, accessibility, SEO, and security Design and implement integrations and automations connecting the website to the company's GTM and billing stack Maintain clean, consistent data flows across the full customer lifecycle, from lead capture through billing and support Build internal tooling and automations that reduce manual work for marketing, sales, and customer success teams Apply security and privacy best practices across all web and integration work, least privilege, proper secrets handling, consent-aware data collection Collaborate with non-technical stakeholders to scope, prioritize, and deliver automation and tooling projects Document architectures, integration flows, and edge cases so the broader team can build on your work Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Senior Backend Developer role focused on designing and delivering scalable server-side applications and APIs using Python and Django for early-stage B2B SaaS products. The position involves architectural ownership, system reliability, and performance optimization in a fully remote, full-time setup. The developer will drive backend best practices, testing, and CI/CD processes. 🗂️ Requirements: 5+ years of backend development experience, Extensive experience with Python, Extensive experience with Django, Proficiency in data modelling, Experience with relational databases, Experience with non-relational databases, Ability to write complex SQL queries, Experience with API design, Experience with system integrations, Experience with distributed systems (synchronous and asynchronous), Hands-on experience with Docker, Hands-on experience with Redis, Experience with message brokers, Experience with cron jobs, Experience writing unit tests (e.g. Pytest), Strong understanding of code quality and testing best practices, Good command of English for technical communication 📃 Skills: Python, Django, SQL, Docker, Redis, Pytest, APIs, Databases, PostgreSQL, MongoDB, CI/CD, MessageBroker, Cron, Git 🏢 Description: Senior Backend Developer (Python/Django; 100% remote) 💰 Salary: 23,400-25,500 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Backend Developer for a partner client with a compelling mission: they act as a product and technology partner for early-stage B2B SaaS founders, helping them navigate the crucial journey from launch to their first million in revenue. They essentially become the dedicated tech backbone for these startups. Requirements: 5+ years of professional backend development experience. Extensive, proven experience with Python and the Django framework. Proficient in data modelling, relational and non-relational databases, and complex SQL queries. Strong experience with API design, integrations, and distributed systems (synchronous & asynchronous communication). Hands-on experience with Docker, Redis, message brokers, and cron jobs. Expertise in writing unit tests (e.g., Pytest) and a commitment to code quality and testing best practices. Great understanding of English with strong communication and collaboration skills. Nice to have: Previous experience in Greentech or Ecotech is a significant plus. Experience as an unofficial tech lead or mentoring junior developers. Knowledge of additional testing methodologies (integration, end-to-end). Responsibilities: Lead the design and development of complex server-side applications, APIs, and databases, taking ownership of architectural decisions. Architect, write, and deliver high-quality, scalable, and efficient code using Python and Django. Collaborate closely with cross-functional teams, including front-end developers and the tech lead, to align backend development with project goals. Architect and implement advanced user authentication, authorisation, and security mechanisms. Conduct performance analysis and optimisation, identifying bottlenecks and implementing solutions. Drive the implementation of automated testing and CI/CD processes to ensure code reliability. Establish and enforce coding standards, conduct thorough code reviews, and document backend architecture and APIs. Take responsibility for system reliability, scalability, and security, ensuring best practices. Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Remote Senior Security DevOps Engineer role in a fintech company building a high-traffic digital trading and investment platform. The position focuses on securing cloud infrastructure, Kubernetes environments, and CI/CD pipelines while implementing strong IAM, network security, and Security as Code practices. This is a full-time B2B contract role with a competitive monthly salary. 🗂️ Requirements: 8+ years of experience in DevOps, Cloud Security, or Site Reliability Engineering, Experience with high-traffic or regulated environments, Strong knowledge of cloud identity systems and authentication protocols, Advanced knowledge of Kubernetes security and cluster hardening, Hands-on experience with Infrastructure as Code tools, Strong understanding of Linux security mechanisms, Knowledge of networking fundamentals (TCP/IP, DNS, TLS), Experience implementing security automation in CI/CD pipelines 📃 Skills: Kubernetes, Terraform, Ansible, Linux, TCP/IP, DNS, TLS, CI/CD, IAM, RBAC, ABAC, MFA, SSO, OIDC, SAML, PKI, SOC2, ISO27001 🏢 Description: Senior Security DevOps Engineer (100% remote) 💰 Salary: 7000-8000 USD/Month 💻 100% remote 🕦 Full-time ☑️ B2B We’re looking for a Senior Security DevOps Engineer to join a fast-growing fintech company that builds a digital trading and investment platform. Requirements: 8+ years of experience in DevOps, Cloud Security, Site Reliability Engineering, or similar roles. Experience working with high-traffic systems or regulated environments, such as financial platforms or other compliance-driven industries. Strong understanding of cloud identity systems and modern authentication protocols. Advanced knowledge of Kubernetes security, container orchestration, and cluster hardening. Hands-on experience with Infrastructure as Code tools such as Terraform or Ansible. Solid understanding of Linux security mechanisms and networking fundamentals, including TCP/IP, DNS, and TLS. Experience implementing security automation within CI/CD pipelines. Nice to Have: Experience supporting security or financial compliance frameworks (e.g., SOC 2, ISO 27001, or similar). Background in cryptography concepts, including encryption standards or PKI management. Experience with resilience or security testing approaches, such as controlled failure or attack simulations. Key Responsibilities: Design and maintain secure identity and access management (IAM) strategies across cloud infrastructure, Kubernetes clusters, and internal platforms using RBAC and ABAC models. Implement privileged access management solutions to enable secure, temporary access to production environments while eliminating long-lived credentials. Enforce strong authentication and identity policies, including MFA, SSO integrations, and modern identity standards such as OIDC and SAML. Secure containerized environments by implementing Kubernetes security best practices, including network policies, workload isolation, and secure container lifecycle management. Develop and maintain network security architecture, including segmentation strategies, firewall configurations, and protection mechanisms for high-throughput APIs. Manage the lifecycle of secrets and sensitive credentials, ensuring secure storage, rotation, and access control across environments. Integrate security scanning and testing tools into CI/CD pipelines to detect vulnerabilities during development and deployment stages. Integrate security monitoring with observability tools to detect anomalies, threats, or unauthorized access attempts in real time. Promote Security as Code practices by automating security policies, checks, and infrastructure configurations. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Backend Engineer role focused on building and maintaining scalable, resilient web-based platforms for global clients. The position involves working in small teams to deliver robust backend systems aligned with client requirements. The role includes developing modern APIs and supporting infrastructure using a contemporary technology stack. 🗂️ Requirements: 2+ years commercial experience in web-based application development, Experience with Ruby, Python, or JavaScript, Experience with SQL databases, Experience with AWS, Docker, or Kubernetes, Strong OOP skills, Experience with Git, Experience with unit testing, Experience with debugging and profiling, Experience with CI/CD, Experience in building modern APIs, Understanding of end-to-end software development cycle 📃 Skills: Ruby, Python, JavaScript, SQL, AWS, Docker, Kubernetes, OOP, Git, CI, CD, APIs, Testing, Debugging, Profiling, Vue.js, React.js, Node.js 🏢 Description: At Upside , we’re not just shipping features - we’re partnering with ambitious companies across the globe to solve complex, meaningful problems through technology. We work in small, focused teams, combining engineering, product thinking, and design, to deliver outcomes, not just output. Open-source is a strategic part of our work. We build and maintain a number of open-source projects that support our clients and internal R&D. Our latest release is Enthusiast , an AI Agent framework tailored for e-commerce use cases. Role Overview: As a Backend Engineer, you will be integral to the process of building and maintaining platforms that meet the needs of our global clients. Your work will significantly support the infrastructure of the solutions directed towards clients. You'll be part of a development team, sized between 3 to 9 members, dedicated to crafting scalable and resilient backend systems. This role involves collaborating closely with both the development team and our clients, ensuring that our backend solutions are perfectly aligned with client requirements and expectations. Job requirements → Relevant commercial experience in building web-based application (>2 years). → Experience in at least one of Upside’s core technology stack: Ruby, Python, JavaScript or the willingness to learn based on your current skills.→ Deep understanding of end-to-end software development cycle. → Great command of written and spoken English. Relevant technology skills: →  Experience with SQL databases. →  Experience with orchestration tools (e.g. AWS/Docker/Kubernetes ). →  Solid OOP skills. →  Experience with Git, unit testing, debugging, and profiling. →  Experience with Continuous Integration and Continuous Delivery. →  Experience in creating modern APIs. →  Knowledge of frontend frameworks and tools (e.g. Vue.js, React.js ) is nice to have. →  Knowledge of Node.js, JavaScript is nice to have. If you didn't find all the information you were looking for, have a look at our handbook - it covers a variety of different matters that could be important at this stage. If there's anything else we did not mention that you're interested in - share your thoughts with us careers@upsidelab.io Salary : Regular Engineer: 10 000 - 13 600 PLN net + VAT Regular+ Engineer: 14 800 - 19 300 PLN net + VAT Location: Office in Kraków, hybrid, fully remotely.

🏢 Summary: Full-time Senior Back-End Engineer (Node.js) role focused on designing and maintaining scalable, high-performance server-side applications and APIs for modern, data-driven platforms. The position involves building RESTful services, integrating with third-party systems, ensuring code quality through testing, and optimizing system reliability and performance. Hybrid work model in Warsaw with B2B or CoE contract options. 🗂️ Requirements: Strong experience with Node.js, Strong experience with Express.js, Experience building and integrating APIs (GraphQL or REST), Knowledge of OAuth, JWT, and session-based authentication, Experience with MySQL, Experience with PostgreSQL, Experience writing unit tests with Chai and Mocha, Experience using Git and version control systems 📃 Skills: Node.js, Express.js, GraphQL, REST, OAuth, JWT, MySQL, PostgreSQL, Chai, Mocha, Git 🏢 Description: Senior Back-End Engineer (Node.js) 💰 Salary: 18,700-20,900 PLN/Month 💻 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) 🕦 Full-time ☑️ B2B or CoE We’re looking for a Senior Back-End Engineer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors. Requirements: Strong experience in building server-side applications using Node.js and Express.js. Hands-on experience with API development and integration, particularly with GraphQL or RESTful services. Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based). Strong experience with databases such as MySQL and  PostgreSQL. Experience writing unit tests with tools such as Chai and Mocha. Strong experience using Git and version control systems. Proficiency in English (both written and spoken). Nice To have: Bachelor’s degree in Computer Science or a related field. Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes. Experience with microservices architecture. Experience setting up CI for static analysis and test execution. Experience developing RAG applications and storing data in vector embeddings. Key Responsibilities: Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js. Guide and supervise the development of key code components to ensure long-term reliability and scalability. Integrate with front-end components and third-party services. Actively review the codebase, recommending and implementing refinements where needed. Write unit and integration tests and optimize performance to ensure high-quality code. Collaborate closely with cross-functional teams to define and implement technical solutions. Improve system performance, reliability, and long-term maintainability through optimization and best practices. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: Backend Software Engineer role focused on building and improving security-sensitive backend services and APIs for a global password and credential management product. The position involves designing robust business logic, access control systems, and integrations while ensuring high standards of security, reliability, and maintainability. Engineers contribute across the full development lifecycle in a collaborative, open-source-driven environment. 🗂️ Requirements: Production experience building backend applications with PHP, Strong knowledge of a modern PHP framework (CakePHP, Symfony or Laravel), Solid backend engineering fundamentals, Ability to design simple, robust solutions for complex problems, Experience with testing and maintaining high code quality, Ability to work on business logic, access control and security-sensitive systems, Collaborative working style with clear communication skills, Interest in security and privacy-focused software development 📃 Skills: PHP, CakePHP, Symfony, Laravel, SQL, PHPUnit, OpenAPI, Git, Docker, Linux, macOS, LDAP, OAuth, JWT, SCIM, WebAuthn, ActiveDirectory, JavaScript, Bash, Python, Go, Rust 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Backend team and help build the systems behind its password and credential management products across Community, Enterprise and Cloud editions. This is a backend engineering role in a security-sensitive product environment. The API sits at the centre of how our client handles business logic, access rights, integrations, data integrity and long-term product reliability. The role is well-suited to an engineer who enjoys solving complex product problems, building sustainable systems, and balancing security, simplicity and maintainability. You would contribute across the full development lifecycle: understanding the problem, shaping the technical approach, implementing features, improving the codebase over time, and helping maintain a high standard of quality. This role will suit someone who likes ownership, thinks clearly about impact and trade-offs, and is motivated by building trustworthy software in an open-source environment. RESPONSIBILITIES: Build and improve backend services and API workflows across product suite Translate functional and product requirements into clear, reliable technical solutions Work on business logic, access control, integrations and security-sensitive application flows Help maintain and improve code quality, test coverage, performance and backward compatibility Contribute to technical design discussions and identify opportunities to simplify or strengthen the system over time Collaborate with product, support, security and engineering peers to refine and deliver solutions Contribute to documentation and knowledge sharing across the team CORE REQUIREMENTS: Experience building backend applications in production with PHP Strong backend engineering fundamentals with a modern framework such as CakePHP, Symfony or Laravel Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just executing tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE: Experience working on security-sensitive applications or authentication / access-control problems Exposure to cryptography-related systems or secure integrations Experience with OpenAPI or well-structured public-facing APIs Experience maintaining long-lived software products Experience with directory integrations or identity systems such as LDAP, Active Directory, OAuth, JWT, SCIM or WebAuthn Experience contributing to open-source projects Familiarity with another language such as JavaScript, Bash, Python, Go or Rust Tools and technologies you’ll work with: You may work across technologies such as PHP, CakePHP, SQL, PHPUnit, OpenAPI, Git and Docker, in Linux and macOS-based development environments. We do not expect candidates to bring experience with every tool listed here. How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You communicate clearly and raise risks early You work well in an environment where feedback is frequent and constructive

🏢 Summary: Backend Software Engineer role focused on building and maintaining secure backend services and APIs for password and credential management products across Community, Enterprise, and Cloud editions. The position involves designing reliable business logic, access control mechanisms, and integrations in a security-sensitive environment. Engineers contribute across the full development lifecycle with strong emphasis on quality, maintainability, and security. 🗂️ Requirements: Commercial experience building backend applications in PHP, Experience with modern PHP frameworks (CakePHP, Symfony or Laravel), Strong backend engineering fundamentals, Ability to design robust solutions for complex problems, Experience writing tests and maintaining code quality, Understanding of security-sensitive systems or access control, Experience working with APIs and backend integrations, Proficiency with SQL and relational databases, Experience using Git for version control, Ability to work in Linux or macOS development environments 📃 Skills: PHP, CakePHP, Symfony, Laravel, SQL, PHPUnit, OpenAPI, Git, Docker, Linux, macOS, LDAP, OAuth, JWT, SCIM, WebAuthn, ActiveDirectory, JavaScript, Bash, Python, Go, Rust 🏢 Description: THE CLIENT Our client is a fast-growing cybersecurity product company rethinking how teams manage and share sensitive access. Their platform is trusted by 40,000+ organisations across 50+ countries - and growing fast. This is an engineering-led business: modern architecture, real technical challenges, and a strong focus on open source, privacy, and security. They’re building a fully remote, collaborative team and looking for engineers who take ownership and enjoy solving meaningful problems. If you want to work on a product with real impact at global scale - this is worth a conversation. THE ROLE: Our client is looking for a software engineer to join its Backend team and help build the systems behind its password and credential management products across Community, Enterprise and Cloud editions. This is a backend engineering role in a security-sensitive product environment. The API sits at the centre of how our client handles business logic, access rights, integrations, data integrity and long-term product reliability. The role is well-suited to an engineer who enjoys solving complex product problems, building sustainable systems, and balancing security, simplicity and maintainability. You would contribute across the full development lifecycle: understanding the problem, shaping the technical approach, implementing features, improving the codebase over time, and helping maintain a high standard of quality. This role will suit someone who likes ownership, thinks clearly about impact and trade-offs, and is motivated by building trustworthy software in an open-source environment. RESPONSIBILITIES: Build and improve backend services and API workflows across product suite Translate functional and product requirements into clear, reliable technical solutions Work on business logic, access control, integrations and security-sensitive application flows Help maintain and improve code quality, test coverage, performance and backward compatibility Contribute to technical design discussions and identify opportunities to simplify or strengthen the system over time Collaborate with product, support, security and engineering peers to refine and deliver solutions Contribute to documentation and knowledge sharing across the team CORE REQUIREMENTS: Experience building backend applications in production with PHP Strong backend engineering fundamentals with a modern framework such as CakePHP, Symfony or Laravel Ability to break down complex problems and design simple, robust solutions Good testing habits and attention to quality Comfort working across product, engineering and implementation questions - not just executing tickets Strong collaboration skills, openness to feedback, and a low-ego working style Interest in security, privacy, or building trustworthy software systems NICE TO HAVE: Experience working on security-sensitive applications or authentication / access-control problems Exposure to cryptography-related systems or secure integrations Experience with OpenAPI or well-structured public-facing APIs Experience maintaining long-lived software products Experience with directory integrations or identity systems such as LDAP, Active Directory, OAuth, JWT, SCIM or WebAuthn Experience contributing to open-source projects Familiarity with another language such as JavaScript, Bash, Python, Go or Rust Tools and technologies you’ll work with: You may work across technologies such as PHP, CakePHP, SQL, PHPUnit, OpenAPI, Git and Docker, in Linux and macOS-based development environments. We do not expect candidates to bring experience with every tool listed here. How you work You take ownership of problems, not just tasks You value simplicity and avoid over-engineering You communicate clearly and raise risks early You work well in an environment where feedback is frequent and constructive

🏢 Summary: Backend Developer role in a global digital asset trading firm, working remotely on live production trading systems and infrastructure. The position focuses on backend services, exchange integrations, real-time market data processing, and reliability improvements within a small, highly technical team. It offers direct impact on trading operations and close collaboration with trading infrastructure in a crypto-focused environment. 🗂️ Requirements: Degree in Computer Science, Electrical Engineering, Software Engineering or related field, Hands-on experience with Python, C++ or another backend/systems language, Understanding of APIs, integrations and production systems, Experience with Linux and debugging, Strong problem-solving skills, Interest in trading systems, financial markets or crypto infrastructure, Very good English proficiency 📃 Skills: Python, C++, REST, WebSocket, Linux, Docker, SQL, PostgreSQL, Redis, Kafka, ClickHouse, APIs, Networking, Concurrency, Algorithms 🏢 Description: Location: 100% remote from Poland Contract: B2B Budget: 10,700–21,400 PLN net + VAT / month Seniority: Junior+ / Mid Industry: digital assets / trading systems We are supporting a global digital asset trading firm in hiring a Backend Developer to join a small, highly technical engineering team working on live production trading systems. You will be working close to trading infrastructure, exchange connectivity, real-time data, reliability, and internal tools used in a production trading environment. The company operates internationally and is now expanding its presence in Poland. What you will work on Depending on your experience and strengths, you may be involved in: building and improving backend services supporting trading operations, integrating with external APIs and crypto exchanges, working with REST / WebSocket APIs, processing real-time market data, improving reliability of production systems, debugging issues in live trading infrastructure, building internal tools and automation for trading operations, collaborating closely with a small technical team. What we are looking for We are looking for someone with strong backend or systems engineering foundations who enjoys solving technical problems and wants to work closer to trading infrastructure. You may be a good fit if you have: a degree in Computer Science, Electrical Engineering, Software Engineering or a closely related technical field , hands-on experience with Python good understanding of APIs, integrations and production systems, experience with Linux and debugging technical issues, strong problem-solving skills and ability to explain your thinking clearly, interest in trading systems, financial markets, crypto infrastructure or real-time systems, very good English - the recruitment process and daily cooperation are in English . Nice to have Any of the following would be a strong plus: experience with trading systems, market data, order books or exchange connectivity, experience with crypto, blockchain, DeFi, market-making, arbitrage or digital assets, experience with WebSocket APIs and real-time data flows, experience with low-latency, high-throughput or performance-sensitive systems, knowledge of algorithms, data structures, concurrency, networking or distributed systems, experience with Docker, SQL, PostgreSQL, Redis, Kafka, ClickHouse or similar technologies. Why this role may be interesting 100% remote setup, B2B cooperation, direct impact on live production trading systems, small technical team with strong ownership, opportunity to work close to crypto trading infrastructure, practical engineering work, not only feature delivery, environment where problem-solving, technical clarity and ownership matter. Sounds interesting? Apply and share your CV. We will contact selected candidates with more details about the company, role and next steps.

🏢 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: Full-time remote Senior DevOps Engineer role in a fintech company building a digital trading and investment platform. The position focuses on designing, deploying, and operating highly available cloud infrastructure on Oracle Cloud, automating infrastructure with IaC, and managing CI/CD, containers, monitoring, and security. The engineer will also support production systems, harden environments, and optimize platform reliability and performance. 🗂️ Requirements: 7+ years in DevOps or Cloud Engineering roles, Hands-on experience with Oracle Cloud Infrastructure services, Experience in high-availability production environments, Infrastructure as Code experience with Terraform, Container orchestration experience with Docker and Kubernetes, CI/CD pipeline implementation using GitHub and Jenkins, Secrets management using HashiCorp Vault, Monitoring and logging stack implementation, Experience with SQL and NoSQL databases, Experience with message brokers, Strong Linux administration skills, Networking knowledge including Nginx and WAF, Scripting in Bash and Python, OS hardening and vulnerability patching for Linux and Windows 📃 Skills: OracleCloud, Terraform, Docker, Kubernetes, Helm, GitHub, Jenkins, Vault, Prometheus, Grafana, ELK, Kibana, NewRelic, Datadog, MySQL, PostgreSQL, CockroachDB, MongoDB, Kafka, Redis, Linux, Nginx, Ansible, Git, Bash, Python, Cloudflare, WAF, ActiveDirectory 🏢 Description: 💰 Salary: 7000-8000 USD/Month 💻 100% remote 🕦 Full-time ☑️ B2B We’re looking for a Senior DevOps Engineer to join a fast-growing fintech company that builds a digital trading and investment platform. Requirements: 7+ years of experience in DevOps, Cloud Engineering, or a closely related infrastructure role. Experience working in high-availability, production-grade environments, ideally within fintech, banking, trading, or other regulated industries. Strong hands-on experience with Oracle Cloud Infrastructure, including services such as IDCS, VCN, Compute Instances, OCR, OKE, OSS, DRG, Buckets, DB system, S2S VPN, Load Balancers, Email Delivery, and vulnerability scanning. Hands-on experience with Infrastructure as Code using Terraform and container orchestration with Docker, Docker Compose, Kubernetes, Helm, and Ingress Controllers. Solid experience with CI/CD tooling, including GitHub, Jenkins, and HashiCorp Vault. Experience automating logging, alerting, and monitoring using stacks such as Alert Manager, Prometheus, Grafana, ELK, Kibana, New Relic, and Datadog. Hands-on experience with databases and message brokers, including SQL, MySQL, CockroachDB, MongoDB, Kafka, Redis, and PostgreSQL. Strong Linux and networking knowledge, including Nginx, Ansible, Git, SAML SSO implementation, Bash scripting, Python, Active Directory, WAF, patch management, and Cloudflare. Experience with OS hardening and vulnerability patching for both Linux and Windows servers. Programming and scripting skills in Bash and Python. Nice to Have: Hands-on experience with API6 API Gateway implementation and configuration. Experience with code analytics tooling such as SonarQube. Familiarity with security and vulnerability tools such as Trendmicro Deep Security and Endpoint Security. Exposure to SOC, DLP, and MDM tooling and processes. Exposure to trading system environments. Experience mentoring junior engineers and contributing to operational documentation. Key Responsibilities: Design, deploy, and operate scalable cloud infrastructure on Oracle Cloud, covering compute, networking, storage, databases, and identity services. Own and evolve Infrastructure as Code using Terraform, and manage container orchestration across Docker, Kubernetes, Helm, and Ingress Controllers. Build and maintain CI/CD pipelines across GitHub and Jenkins, and manage secrets via HashiCorp Vault. Implement and automate logging, alerting, and monitoring across Alert Manager, Prometheus, Grafana, ELK, Kibana, New Relic, and Datadog, with health checks integrated into deployments. Configure and maintain databases and message brokers, including MySQL, PostgreSQL, CockroachDB, MongoDB, Kafka, and Redis. Implement and configure the API6 API Gateway, manage WAF rules, and harden network-layer services including Nginx and Cloudflare. Perform OS hardening and vulnerability patching across Linux and Windows servers, and operate endpoint security tooling such as Trendmicro Deep Security. Lead root cause analysis and post-mortems, document operational processes, and contribute to runbooks and performance metrics tracking. Mentor junior engineers, collaborate with development teams on software requirements and test interpretation, and consult with management on operational impact and risk of platform decisions.