Senior Backend Developer (Python/Django; 100% remote)

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

🏢 Summary: Full-time, 100% remote Senior Frontend Developer role focused on building and scaling complex, responsive web applications powered by AI-driven platforms. The position involves architecting high-quality front-end solutions, integrating with back-end services, and ensuring performance, scalability, and cross-browser compatibility. The role also includes driving best practices, code quality, and modern front-end standards within the team. 🗂️ Requirements: Strong knowledge of HTML5, CSS3, JavaScript (ES6), Strong understanding of DOM, Experience with React.js, Experience with Material UI, Experience with Responsive Design and cross-browser compatibility, Familiarity with SASS or LESS, Understanding of BEM methodology, Knowledge of CSS-in-JS, Knowledge of browser storage (cookies, localStorage, sessionStorage), Proficiency with npm or yarn, Experience with Jest or equivalent testing frameworks, Understanding of SEO best practices, Familiarity with TypeScript, Knowledge of SSR and service workers, Experience with Webpack, Vite, or Rollup, Understanding of browser extensions integration 📃 Skills: HTML5, CSS3, JavaScript, ES6, DOM, React, MaterialUI, SASS, LESS, BEM, CSS-in-JS, cookies, localStorage, sessionStorage, npm, yarn, Jest, TypeScript, SSR, Webpack, Vite, Rollup, SEO, ServiceWorkers 🏢 Description: Senior Frontend Developer (100% remote) 💰 Salary: 20,000-23,000 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Frontend Developer for a partner client that helps businesses use artificial intelligence to run more efficiently and grow faster. The company builds and provides digital platforms and consulting services that enable organizations to manage operations, analyze data, and improve performance. Their solutions combine AI, automation, and deep business expertise to help clients simplify workflows, gain insights, and deliver greater value. Requirements: HTML5 , CSS3 , JavaScript (ES6) Strong understanding of the Document Object Model (DOM) Skilled in Responsive Design and cross-browser compatibility Experience with React.js and Material UI Familiarity with CSS preprocessors such as SASS or LESS Understanding of BEM methodology and CSS-in-JS approaches Knowledge of browser storage mechanisms (cookies, localStorage, sessionStorage) Proficient in using package managers (npm/yarn) Experience in unit testing using Jest or equivalent frameworks Understanding of SEO best practices Familiarity with TypeScript for type-safe, large-scale applications Knowledge of server-side rendering (SSR) and service workers Experience with code bundling and modern module bundlers (e.g., Webpack, Vite, Rollup) Understanding of browser extensions and their integration with web applications Responsibilities: Develop and maintain  complex, responsive user interfaces for large-scale web applications. Architect and integrate front-end components with back-end APIs and services , ensuring security, scalability, and performance. Drive the implementation of pixel-perfect UI/UX designs across browsers and devices. Provide technical mentorship to junior developers and guide the team in adopting modern best practices. Conduct code reviews , enforce standards, and maintain a clean, modular codebase. Evaluate and recommend new frameworks, tools, and libraries to enhance productivity. Manage project timelines, estimate development efforts, and collaborate effectively with cross-functional teams. Maintain comprehensive front-end documentation , design patterns, and style guides. Stay updated with industry trends , emerging technologies, and front-end innovations to continuously improve team capabilities. Participate in architectural discussions , ensuring long-term scalability and maintainability of the front-end ecosystem. 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 Fullstack Python Engineer role focused on building and maintaining scalable SaaS platforms for influencer marketing using large-scale datasets and AI-driven solutions. The position involves full-stack development across frontend and backend systems in a lean engineering team. 🗂️ Requirements: 5+ years of experience developing large-scale systems and web applications, Proficiency with HTML, CSS, JavaScript, React, and Node.js, Strong expertise in Python and Django, Experience with PostgreSQL or MySQL, Knowledge of Functional Programming and Object-Oriented Programming, Experience with Git and GitHub, Experience working in Agile/Kanban environments, Strong written and verbal communication skills, Ability to work remotely with overlap to US Pacific Time 📃 Skills: Python, Django, React, Node.js, HTML, CSS, JavaScript, PostgreSQL, MySQL, Git, GitHub, Agile, Kanban, ElasticSearch, ETL 🏢 Description: Position: Senior Fullstack Python Engineer Working model: 100% Remote Salary: USD 6,200 – 7,400 /  month Type of contract: B2B Our Client is a successful SaaS creator marketing solution provider. The Company has been connecting and supporting Influencers and Fortune 500 brands in building their content marketing strategies for over a decade. They are looking for a Senior Python developer to join their lean, 6 people team to work on their set of solutions, using high volume of data (over 300B data points, nearly 2 M creators, 750M elements of content and counting), AI and tackling technical challenges on a daily basis. Responsibilities Collaborate with product, developers, and stakeholders to create visually stunning and responsive user interfaces. Design, build, and maintain Open Influences Platforms across the entire technology stack. Contribute to the design and development of backend architectures that address high workloads. Write clean, efficient, and maintainable code using modern web development languages and practices. Develop and maintain reusable code libraries and frameworks. Requirements A minimum of 5 years of experience in designing and developing large-scale systems and web-based applications. Proficiency in front-end technologies, HTML, CSS, and JS frameworks like React and Node.js Mastery of Python, Django, and RDBMS such as Postgres or MySQL. Knowledge of Functional Programming and Object-Oriented Programming paradigms. Experience with version control systems, specifically Git and GitHub. Experience with Agile (Kanban) development processes. Excellent written and verbal communication skills. Ability to work remotely with at least a 4-hour overlap with 9 am – 6 pm US Pacific Time (during the trial period full US Pacific Time coverage). Bonus points for Experience with performance tuning, identifying, and resolving bottlenecks. Familiarity with the ETL process and handling of larger data sets. Familiarity with ElasticSearch Comfortable with full-stack development, emphasizing front-end efforts to modernize platforms. Experience or keen interest in innovative product development. Strong understanding of and experience with big data solutions.

🏢 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: Full-time remote engineering role focused on developing and scaling a SaaS platform that delivers digital identity records for physical products via QR codes. The position involves building and extending a Django-based backend, creating React/TypeScript front-end features, and designing data pipelines integrating external product systems. The engineer will also contribute to cloud infrastructure reliability and architectural decisions as the platform grows. 🗂️ Requirements: 5+ years of hands-on software engineering experience, Advanced Python and Django expertise, Strong TypeScript and React proficiency, Experience with REST APIs and webhooks, Experience processing JSON, XML, CSV data formats, Experience with Google Cloud Platform or AWS or Azure, Experience using AI-assisted development tools (e.g., Claude, GitHub Copilot), Advanced English proficiency 📃 Skills: Python, Django, TypeScript, React, Tailwind, REST, Webhooks, JSON, XML, CSV, GCP, AWS, Azure, Claude, Copilot 🏢 Description: 💰 Salary: 19 100 - 23 400 PLN per month 🌎 100% remote 🕦 Full-time position, long-term ☑️ B2B Contract The company operates a SaaS platform that lets brands create and administer digital identity records for their physical goods. Shoppers reach these records by scanning QR codes on items such as apparel or footwear, landing in branded interfaces that surface sustainability data, maintenance guidance, after-sales support, and secondary market options. The product ingests existing product data from brand clients and makes it consumable at scale. Requirements: At least 5+ years of hands-on engineering experience, combined with solid product thinking Advanced Python capability, since Django carries most of the platform's business logic Confident working knowledge of TypeScript, React, and Tailwind CSS Practical background integrating REST endpoints and webhooks, plus experience parsing inconsistent production data in formats such as JSON, XML, and CSV Direct exposure to Google Cloud Platform, or transferable depth in AWS or Azure Daily use of AI-assisted development tools such as Claude or GitHub Copilot as part of standard workflow Advanced spoken and written English Nice to Have: Prior work with enterprise resource planning or product information management systems, for instance SAP, Akeneo, or inRiver Exposure to GS1 specifications or other supply chain data interchange formats Key Responsibilities: Extend and refine the Django-based Python backend through new API endpoint development, data model changes, background job processing, and performance tuning Build and maintain the APIs that power the Passport Builder product Deliver user-facing functionality written in TypeScript and React within the Passport Builder and the administrative tools used by brand teams Take responsibility for uptime and monitoring on GCP infrastructure, spotting anomalies ahead of customer-reported incidents Contribute to technical direction and shape architectural choices as the platform expands across additional clients, larger product catalogs, and new geographic regions Architect and implement data pipelines that move ERP, PLM, and PIM records from client systems into the platform during new brand onboarding 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: Full-time Senior Full Stack Developer role focused on building scalable, data-driven platforms for financial and enterprise sectors using Node.js and React. The position involves designing microservices, developing RESTful APIs, and creating responsive front-end applications in a hybrid work model (Warsaw). 🗂️ Requirements: 5+ years experience as Senior Full Stack Developer, Strong expertise in Node.js, Strong expertise in React, Experience with Express.js, Experience building RESTful or GraphQL APIs, Knowledge of OAuth and JWT authentication, Proficiency in Redux, HTML5, CSS3, ES6+, Experience with Vite, Webpack or Babel, Experience with MySQL or PostgreSQL, Experience with AWS, Azure or GCP, Experience with Docker and Kubernetes, Proficiency with Git 📃 Skills: Node.js, React, Express.js, GraphQL, REST, OAuth, JWT, Redux, HTML5, CSS3, JavaScript, ES6, Vite, Webpack, Babel, MySQL, PostgreSQL, AWS, Azure, GCP, Docker, Kubernetes, Git, SQL, MongoDB, CI/CD 🏢 Description: Senior Full Stack Developer (Node.js + React) 💰 Salary: 23,000-24,800 PLN/Month 💻 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) 🕦 Full-time ☑️ B2B or CoE We’re looking for a Senior Full-Stack Developer 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: 5+ years of experience as a Senior Full Stack Developer with significant expertise in Node.js and React. 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). Front-end proficiency in React.js, Redux, HTML5, CSS3, and modern JavaScript (ES6+). Familiarity with front-end build tools such as Vite, Webpack, and Babel. Strong experience with databases such as MySQL and  PostgreSQL. Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes. Strong experience using Git and version control systems. Proficiency in English (both written and spoken). Key Responsibilities: Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js. Develop and maintain interactive, responsive user interfaces using React.js, Redux, and modern JavaScript (ES6+). Lead the design and implementation of scalable architectures and microservices. Work closely with database engineers to design efficient schemas and manage data interactions using SQL databases or MongoDB. Ensure reliable deployments and smooth release of updates using CI/CD pipelines and Docker. 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 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: Remote B2B opportunity for a Junior Python Developer to work on trading systems, market data flows, backend services, and exchange integrations in a digital assets environment. The role focuses on Python backend development in a production setting with exposure to real-time trading infrastructure and international collaboration. 🗂️ Requirements: 1–2 years commercial Python experience, Python backend development experience, Experience with APIs and integrations, Knowledge of REST APIs, Experience with SQL, Experience with PostgreSQL or another relational database, Familiarity with Linux, Familiarity with Git, Debugging skills, Technical degree in Computer Science, Software Engineering, Mathematics, Physics, Electrical Engineering or related field, Very good English 📃 Skills: Python, FastAPI, Django, Flask, Celery, asyncio, REST, WebSocket, SQL, PostgreSQL, Linux, Git 🏢 Description: Junior Python Developer | Trading Systems Location: 100% remote from Poland Contract: B2B Budget: 10,700–21,400 PLN net + VAT / month Industry: Digital assets / trading systems We are supporting a global digital asset trading firm in hiring a Junior Python Developer to join a small, highly technical engineering team. This is a Python-first role for someone who already has commercial experience with Python and wants to develop further in a production environment close to trading infrastructure, real-time data and exchange integrations. You will work on systems supporting trading operations, market data flows, internal tools and backend services used in a live environment. What you will work on developing and improving Python backend services, building integrations with external APIs and crypto exchanges, working with REST and WebSocket APIs, processing and validating market data, developing internal tools and automation for trading operations, debugging production issues and improving system reliability, working with databases, logs and service integrations, collaborating with an international engineering team in English. What we are looking for We are looking for someone who wants to build their career in Python backend development and is comfortable using Python as their main programming language. You may be a good fit if you have: around 1–2 years of commercial Python experience , hands-on experience with Python backend development, APIs, integrations or production tools, familiarity with FastAPI, Django, Flask, Celery, asyncio or similar technologies, understanding of REST APIs, external integrations and basic database concepts, experience with SQL and PostgreSQL or another relational database, familiarity with Linux, Git and debugging, strong problem-solving skills, completed technical degree in Computer Science, Software Engineering, Mathematics, Physics, Electrical Engineering or a related field, very good English - the recruitment process and daily work are conducted in English. Why this role may be interesting 100% remote work from Poland, B2B cooperation, opportunity to work on real production systems rather than only standard web applications, exposure to market data, exchange integrations and trading infrastructure, small engineering team with direct technical ownership, strong learning environment and collaboration with experienced international engineers, opportunity to grow in Python, backend development and digital asset trading. Interested? Apply with your CV and we will contact selected candidates with more information!

🏢 Summary: Full-time Team Lead Software Engineer role focused on leading a full-stack team building high-performance web applications using React and Node.js. The position combines hands-on development with architectural ownership, mentoring, and delivery of scalable, AI-powered enterprise platforms. Work involves designing microservices, APIs, and cloud-based containerized deployments in a hybrid setup from Warsaw. 🗂️ Requirements: 7+ years full-stack experience with React.js and Node.js in production, 2+ years in Team Lead or senior engineering leadership role, Strong knowledge of React ecosystem (Redux, Hooks, component architecture, performance optimization), Proficiency in HTML5, CSS3, JavaScript ES6+, Experience with build tools (Webpack, Vite, or Babel), Experience with Express.js and RESTful API design, Knowledge of OAuth, JWT, session-based authentication, Experience with PostgreSQL or MySQL, Experience with MongoDB or other NoSQL databases, Hands-on experience with Docker, Familiarity with AWS or other major cloud platform, Experience with Git and Agile/Scrum methodologies 📃 Skills: React, Redux, JavaScript, HTML5, CSS3, Node.js, Express, REST, GraphQL, OAuth, JWT, PostgreSQL, MySQL, MongoDB, Docker, Kubernetes, AWS, Git, Webpack, Vite, Babel, Agile, Scrum 🏢 Description: 💰 Salary: 29,500–33,200 PLN/month 🌎 Hybrid from Warsaw, Poland 🕦 Full-time position, long-term ☑️ Contract of Employment We are looking for a Team Lead Software Engineer to join our client, a technology company that builds AI-powered platforms and consulting solutions for enterprise operations, with a strong focus on the private capital sector. The company has over ten years of experience working with high-growth and PE-backed businesses, combining deep domain expertise with advanced technology to drive measurable results. In this role, the focus will be on leading a team of developers across front-end and back-end development, owning architectural decisions, and contributing directly to the codebase. You will mentor engineers and drive the delivery of high-performance web applications using React and Node.js. Requirements 7+ years of full-stack development experience with React.js and Node.js in production environments 2+ years in a team lead, tech lead, or senior engineering leadership role Strong command of the React ecosystem: Redux, React Hooks, component architecture, and performance optimization Solid HTML5, CSS3, and modern JavaScript (ES6+); experience with build tooling such as Webpack, Vite, or Babel Proficiency with Express.js and API design (RESTful; GraphQL is a plus) Working knowledge of auth patterns: OAuth, JWT, session-based authentication Hands-on experience with PostgreSQL or MySQL; familiarity with MongoDB or similar NoSQL databases Docker experience required; Kubernetes is a plus Familiarity with at least one major cloud platform (AWS preferred) Comfortable with Git workflows and Agile/Scrum delivery Responsibilities Lead and mentor a team of software engineers; run code reviews, set engineering standards, and hold the bar on quality Architect and build full-stack features using React.js (with Redux and Hooks) on the front end and Node.js / Express.js on the back end Design scalable microservices and RESTful (or GraphQL) APIs aligned with product requirements Own the testing strategy: define coverage expectations, enforce unit and integration testing, and integrate quality gates into CI/CD pipelines Manage containerized deployments via Docker; collaborate on infrastructure with cloud platforms (AWS, Azure, or GCP) Partner directly with Product and Design to translate requirements into production-grade, accessible interfaces Model and maintain SQL and NoSQL data schemas; own data interaction patterns across services Monitor production systems, triage incidents, and drive root-cause resolution Keep technical documentation accurate and up to date 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. We employ people with experience in international corporations as well as the ones from the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Full-time hybrid contract for an experienced Python Fullstack Developer working on AI-driven automation and data transformation solutions in the financial sector. The role involves building scalable full-stack applications, REST APIs, microservices, and LLM-based solutions using Python, Flask, and React in an Agile international team. 🗂️ Requirements: Strong commercial experience with Python, Experience with Flask or similar Python frameworks, Knowledge of REST API development, Experience with Large Language Models, Experience with Docker, Knowledge of JavaScript, Experience with React, Understanding of PostgreSQL, SQL and SQLAlchemy, Experience writing automated tests with pytest, Experience with CI/CD pipelines, Knowledge of Git, English level B2/C1 📃 Skills: Python, Flask, REST, LLM, Docker, JavaScript, React, PostgreSQL, SQL, SQLAlchemy, pytest, CI/CD, Git, TypeScript, Redux, Zustand, AWS, Kubernetes, SharePoint, JFrog, CSS, SCSS 🏢 Description: Expert Python Fullstack Developer 📍 Location: Warsaw 🏢 Work model: Hybrid (3 days per week in the office) 📅 Project duration: July 2026 – December 2026 💰 B2B rate: up to 142 PLN/h ⏰ Full-time (40h/week) About the project We are looking for an experienced Python Fullstack Developer to join an international team delivering innovative solutions for the financial sector. The project focuses on data transformation, AI-driven automation, and intelligent data enrichment , leveraging modern technologies including Large Language Models (LLMs) to improve operational efficiency and regulatory compliance. You will work closely with Product Owners, Architects, Analysts and other developers to transform business requirements into scalable, secure and high-quality software solutions. Your responsibilities Design, develop and maintain modern full-stack applications. Build backend services using Python and Flask . Develop and maintain REST APIs and data integration services. Implement AI-powered solutions using LLMs for automation and data enrichment. Develop frontend components using React and JavaScript. Build microservices and deployment pipelines. Integrate with databases, external APIs and enterprise platforms. Ensure data quality, reconciliation and regulatory compliance. Write automated tests and participate in code reviews. Collaborate with cross-functional, international teams in an Agile environment. We are looking for someone who has Strong commercial experience with Python development. Hands-on experience with Flask (or similar Python frameworks). Solid knowledge of REST API development. Experience working with Large Language Models (LLMs) . Experience with Docker . Good knowledge of JavaScript . Experience with React . Good understanding of PostgreSQL , SQL and SQLAlchemy . Experience writing automated tests (preferably using pytest ). Experience with CI/CD pipelines . Good knowledge of Git . Good command of English (B2/C1) . Nice to have AI development tools and frameworks. TypeScript. Redux or Zustand. AWS Cloud. Kubernetes. SharePoint API. JFrog Artifactory. Web Components. CSS / SCSS. What we offer B2B rate of up to 142 PLN/hour . Opportunity to work on innovative AI and data-driven solutions within the banking sector. International and collaborative Agile environment. Exposure to modern technologies including LLMs , cloud solutions and microservices. Challenging project with real business impact. Long-term cooperation with experienced engineering team