Freelance Senior Full Stack Developer

🏢 Summary: Fixed-term, project-based collaboration for a Full Stack Developer to build and maintain modern, scalable web applications for international clients using a TypeScript-based stack. The role involves close cooperation with an in-house team to deliver high-quality solutions within defined timelines. It focuses on full-stack development across frontend and backend using modern JavaScript frameworks and cloud technologies. 🗂️ Requirements: Minimum 3 years of commercial software development experience, Commercial experience with TypeScript, Commercial experience with React, Commercial experience with Next.js, Commercial experience with Node.js, English proficiency at B2+ level, Fluent Polish (C1 or native), Technical university degree in IT or related field 📃 Skills: TypeScript, React, Next.js, Node.js, Nest.js, ReactNative, PostgreSQL, AWS, Docker, JavaScript 🏢 Description: Project-Based | Fixed-Term Collaboration At TeaCode , we’re expanding our network of trusted freelance developers for upcoming fixed-term, project-based collaborations . If you’re a Full Stack Developer looking for meaningful short-term projects, we’d love to hear from you! You’ll be joining us for a specific project, working alongside our in-house team to deliver modern, scalable digital solutions for international clients. This is a great opportunity if you enjoy focused, time-boxed assignments and want to collaborate with a like-minded, fast-moving team. Our core tech stack : TypeScript Next.js React React Native Nest.js Node.js PostgreSQL AWS Docker Key responsibilities: Develop and maintain full-stack web applications using TypeScript and modern frameworks (React, Next, Node, Nest) Write clean, efficient, and well-documented code, following industry best practices Collaborate with designers, developers to implement new features and improve existing functionalities Deliver high-quality code within project timelines and communicate clearly with project stakeholders and external clients Identify and fix bugs, optimize application performance, and ensure high reliability and scalability Requirements: Min. 3 years of commercial experience in software development Have an extensive knowledge as well as commercial experience in Typescript, React, Next.js, and Node.js Knowledge of English at min. B2+ level and fluent Polish (C1 or native) Technical university degree within IT field Self motivation, willingness to learn new things and positive attitude to change Good communication and teamwork skills are a must Experience in React Native would be an asset What we offer: A collaborative and supportive work environment Engaging projects that challenge your creativity and technical expertise Macbooks Pro equipment to work on Coworking office space in a vibrant location of Warsaw Recruitment process: HR screening (15-30 minutes) Technical interview: live coding session (1 hour) Decision About us: We are a software house based in Warsaw with over 50 people on board We work in one programming language → JavaScript/TypeScript We have clients from all over the world We are really flexible in working hours The atmosphere within the team is our great value

🏢 Summary: Project-based freelance role for a Mobile Developer focused on building and maintaining React Native applications for international clients in a fully remote setup. The position involves collaborating with cross-functional teams on scalable mobile solutions using a modern JavaScript/TypeScript ecosystem. Developers join fixed-term projects and work closely with in-house teams in an Agile environment. 🗂️ Requirements: 3+ years commercial experience with React Native mobile development, Experience with TypeScript, Experience with JavaScript, Experience publishing apps to Google Play, Experience publishing apps to Apple App Store, Experience with Xcode, Experience with Android Studio, Knowledge of RESTful APIs, Understanding of mobile app architecture, Experience working in Agile methodologies, English level B2+, Strong communication skills, Ability to work independently, Located in Europe 📃 Skills: React, ReactNative, TypeScript, JavaScript, Next.js, Nest.js, Node.js, PostgreSQL, Supabase, Xcode, AndroidStudio, REST, Agile 🏢 Description: Pay rate: 60 - 120 zł/h (depending on experience) Type of agreement: B2B contract Type of work: 100% remote Project-Based | Fixed-Term Collaboration At TeaCode, we’re expanding our network of trusted freelance developers for upcoming fixed-term, project-based collaborations. If you’re a Mobile Developer working with React Native on a daily basis looking for meaningful project-based engagement, we’d love to hear from you! You’ll be joining us for a specific project, working alongside our in-house team to deliver modern, scalable digital solutions for international clients. This is a great opportunity if you enjoy focused, time-boxed assignments and want to collaborate with a like-minded, fast-moving team. Our core tech stack: TypeScript Next.js React React Native Nest.js Node.js PostgreSQL Supabase Responsibilities Develop and maintain high-quality mobile applications using React Native. Collaborate with cross-functional teams to define, design, and ship new features. Ensure the performance, quality, and responsiveness of applications. Identify and resolve bugs and performance bottlenecks. Requirements: 3 years of commercial experience in mobile app development using React Native and TypeScript/JavaScript Experience in releasing/publishing mobile apps on Google Play and Apple App Store Experience in working with Xcode and Android Studio Strong knowledge of JavaScript and TypeScript. Familiarity with RESTful APIs and mobile app architecture. Experience working in Agile methodologies English at min. B2+ level Good communication skills are a must Ability to work independently and manage freelance project timelines effectively. Located in Europe How we work We work as a team , with strong support from senior developers and tech leads As a Mid Developer, you’re expected to: take responsibility for your tasks and features ask questions and seek feedback when needed actively participate in discussions and refinements You’ll work directly with clients , so good communication really matters We care about building good products , not just completing tasks More about how we work with freelancers 👉 https://www.teacode.io/collaboration What we offer Flexible freelance engagement allowing autonomy over work schedule. Work with clients from all over the world Flexible working hours and 100% remote setup Development in AI tools and modern development workflows About us 50+ people on board Warsaw-based software house with a strong product mindset Friendly, supportive atmosphere - no corporate nonsense Recruitment process HR Interview (30 min): A conversation with our Head of HR to understand your experience, motivation, and expectations. Technical Interview (60 min): A meeting with one of our Developers where you’ll talk about: solving technical problems code quality and best practices how you approach tasks and challenges how you use AI tools in your daily work Decision: Usually within one week after the interview. Once you're in, you become part of our verified freelance pool – the TeaCode Collaborators. From there, we’ll match you with suitable projects based on current needs and timelines. Depends on the specific project: final Interview (30 min) When the project matching your skills and pay rate expectations appears, we will contact you. A conversation with our Delivery Manager of the project: Project fit detailed offer connected with engaging you in this specific project (rate, timeline, %FTE) confirming your availability

🏢 Summary: Full-time Backend Developer role focused on building and maintaining scalable Node.js and TypeScript applications for US clients across various industries, including MVP-stage products. The position involves designing backend architecture, working with SQL/NoSQL databases, and collaborating in Scrum teams in a flexible, remote-first environment. The offer includes long-term cooperation and participation in diverse, technically challenging projects. 🗂️ Requirements: 2+ years commercial experience in Node.js, Experience with Node.js frameworks (Express.js, NestJS or similar), Strong proficiency in TypeScript, Experience with SQL databases, Experience with NoSQL databases, Knowledge of SOLID and KISS principles, Knowledge of design and architecture patterns, Experience with Docker, Experience with GitHub Actions, Basic experience with AWS services, Ability to use ORM or query builders (e.g. Prisma, Knex), English level B2, Polish level C1 📃 Skills: Node.js, TypeScript, JavaScript, Express, NestJS, Fastify, SQL, NoSQL, Prisma, Knex, Docker, AWS, GitHub, GitHubActions, React 🏢 Description: We are looking for skillful Backend Developers to join one of our teams working with US clients - referrals from the high-end American IT market. Our tech stack is built around React, Node.js and TypeScript. We are working with well-established companies and sometimes startups in their early stages (MVPs), which makes the job full of diversity and exciting challenges while crafting cutting-edge solutions. Enjoy the flexibility of working within the Polish time zone and collaborate with clients from diverse industries such as FinTech, SportsTech, MedTech, and many others. Required skills: 2+ years of commercial experience in Node.js, SQL and NoSQL DBs, knowledge of JS frameworks (e.g Express.js, NestJS), experience in TypeScript, SOLID and KISS, knowledge about design and architecture patterns, know how and why Docker and GitHub Actions works, basic usage of AWS services, English B2, Polish C1 Offer: B2B/UZL, paid days off, 100% remote (or hybrid/onsite - as you prefer), Polish time zone, flexible hours, full-time position, long-term contract, Scrum Teams Perks and Benefits: Budgets for self-development, integrations, healthcare & sport activities, Mentoring Program, Individual Career Path, Paid Time Off, Paid Health Break & more Tools you'll use: Apple MacBook Pro, Slack, GSuite, GitHub, Jira, Coda, FigJam Your future tasks and duties: Writing readable and easy-to-maintain JS/TS code with OOP flavor Writing documentation for delivered code Code review of other developers in the team Direct involvement with the design and modification of basic DB structures Propose improvements and share proactive ideas/solutions with the team to enhance the team's work processes Share insights with the team to diagnose issues and focus on solutions Actively participate in project discussions Listen to the client's needs and, after consulting the team, suggest solutions Support less experienced team members About you - Tech skills & Experience: 2+ years of commercial experience in Node.js Good experience with at least one Node.js backend framework (e.g. Express.js, NestJS, Fastify, etc) - you know most of its basic APIs/features, worked on at least 1-2 projects involving such technologies Strong proficiency in TypeScript. You have practical experience with static typing, advanced types, and configuring TS compilers, treating it as your primary language to build robust and type-safe backend applications Potentially worked with NoSQL databases and/or in-memory databases and utilized them as a data store Worked with SQL databases (integration-wise and as a basic design skill) with ORM or query builder tool (ie. Prisma, Knex) Knows the basics of building AI applications (RAG, Agents, etc.) Use AI effectively in their work About you - Soft Skills: English level B2 to cooperate with American clients Polish level C1 to communicate easily within the team Open-minded to new challenges (e.g. different frameworks) Understand the significance of MVP and prioritize the pursuit of excellence and high-quality outcomes, even amid tight project timelines. Communicate with the team to efficiently translate business complexities (user stories/tasks) into solutions (results/estimations) Staying on top with trends/news, sharing them, teaching others and aiming for the best quality solutions Strong problem-solving abilities to diagnose issues, suggest solutions, and make decisions based on project requirements Nice to have: Worked in Agile/Scrum on a daily basis consisting of people with similar skills and monitoring code quality on a daily basis Basic experience with AWS - used some services in specific cases Basic experience with Docker - know how to prepare and debug the environment and connect things up to work locally Worked in the very beginning of the product development/creation stage Understand the significance of MVP and aim to deliver top-notch results, even amid tight project timelines Recruitment process: CV Review Phone call with our Recruiter (15min) Soft-skills interview with our Recruiter (1h) Technical interview with our Specialists (2h) Decision and feedback 🥳 Meaningful projects, top-notch experts and value-driven workplace Sound good? Apply now!

🏢 Summary: Full Stack Developer role focused on building scalable, cloud-native APIs and data pipelines in AWS using TypeScript and serverless architecture. The position involves developing and maintaining backend services, infrastructure as code, and CI/CD processes in a fully remote, long-term project. The role also includes partial development of Java services and working within a SAFe Agile environment. 🗂️ Requirements: Proven experience as Full Stack Developer, Strong proficiency in TypeScript and Node.js, Hands-on experience with AWS services: Lambda, S3, StepFunctions, EventBridge, DynamoDB, APIGateway, CDK, Experience with CICD tools such as GitHubActions or Bamboo, Strong SQL skills and experience with PostgreSQL, Experience with NoSQL databases, Ability to develop and maintain Java services, Understanding of serverless and event-driven architecture, Experience with OpenAPI or Swagger, Experience with authentication and authorization frameworks such as Auth0, AzureAD, PingIdentity, Experience working in SAFe Agile environment, EU citizenship and residence in Poland 📃 Skills: TypeScript, Node.js, AWS, Lambda, S3, StepFunctions, EventBridge, DynamoDB, APIGateway, CDK, PostgreSQL, SQL, MongoDB, CICD, GitHubActions, Bamboo, Java, Python, OpenAPI, Swagger, Auth0, AzureAD, PingIdentity, Serverless, SAFe 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking for an experienced Full Stack Developer (TypeScript&AWS) to join a fully remote l development team delivering scalable, cloud-native solutions. The role focuses on building modern APIs and data pipelines using serverless and event-driven architecture within AWS environment. Project information: Type of project: IT Services Office location: Warszawa, Poland Work mode: Remote Budget: 100-120 PLN net/h - b2b Project length: Long-term Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate availability) Project scope: Design, develop, and maintain APIs using TypeScript (Node.js) and serverless architecture patterns Build and manage data ingestion pipelines using AWS Lambda, S3, PostgreSQL, and Step Functions Implement infrastructure as code using AWS CDK Collaborate with DevOps teams to manage deployments via CI/CD tools (GitHub Actions/Bamboo) Use AWS SDKs to integrate AWS services within application code Develop and maintain Java-based services where required (approximately 20% of the role) Work with NoSQL databases such as DynamoDB or MongoDB, as well as relational databases Ensure robust data validation, error handling, and orchestration in pipelines Document APIs using OpenAPI/Swagger for seamless front-end/back-end integration Implement secure authentication and authorization mechanisms (Auth0 or similar solutions) Participate in SAFe Agile ceremonies including PI Planning, Sprint Planning, Daily Stand-ups, and Retrospectives Collaborate cross-functionally with Product Owners, Scrum Masters, and development teams Requirements: Proven experience as a Full Stack Developer or similar role Strong proficiency in TypeScript (Node.js) Hands-on experience with AWS services: Lambda, S3, Step Functions, EventBridge, DynamoDB, API Gateway, and CDK Experience with CI/CD tools such as GitHub Actions or Bamboo Strong SQL skills and experience with relational databases (PostgreSQL preferred) Experience working with NoSQL databases Ability to develop and maintain Java services; Python knowledge is a plus Understanding of data validation, error handling, and pipeline orchestration Familiarity with authentication and authorization frameworks (Auth0, Azure AD, Ping Identity, or similar) Strong analytical thinking and problem-solving skills Excellent communication skills and ability to work in cross-functional teams Experience working in a SAFe Agile environment and understanding Lean-Agile principles We offer: Opportunity to work on modern, cloud-native AWS projects Fully remote working model Full-time job agreement based on on b2b Private medical care with dental care (covering 70% of costs) Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Senior Full Stack Developer role for an international product team focused on building scalable applications using TypeScript, React, Node.js, PostgreSQL, and Kafka. The contract is remote, B2B, initially for 6 months with possible extension, and includes collaboration in an agile international environment with AI-powered development tools. 🗂️ Requirements: 8+ years of commercial software development experience, Strong TypeScript experience, Experience with React, Experience with Node.js, Experience with NestJS, Knowledge of PostgreSQL, Knowledge of REST APIs, Knowledge of Kafka, Experience building scalable systems, Daily use of AI coding tools, English level B2+/C1 📃 Skills: TypeScript, React, Node.js, NestJS, PostgreSQL, REST, Kafka, Claude, Cursor, Codex, Copilot 🏢 Description: co.brick talents — powered by AI, powered by people. Senior Full Stack Developer (TypeScript / React / Node.js) Location: Remote Contract: B2B Rate: Up to 150–160 PLN/hour Duration: 6 months with a strong possibility of extension Start: ASAP About the project We are looking for an experienced Senior Full Stack Developer to join an international product development team. You will work on building and enhancing scalable software solutions in a modern technology stack, collaborating with experienced engineers in an agile environment. Your responsibilities Design, develop, and maintain scalable full stack applications. Build high-quality backend services and modern frontend solutions. Develop and integrate REST APIs. Work with PostgreSQL and Kafka-based architectures. Collaborate with cross-functional, international teams. Apply AI-powered coding tools to improve development efficiency and code quality. Requirements 8+ years of commercial software development experience. Strong experience with TypeScript on both the frontend and backend. Hands-on experience with React and Node.js/NestJS . Solid knowledge of PostgreSQL , REST APIs , and Kafka . Experience designing and building scalable systems or software products. Daily use of AI coding tools such as Claude Code, Cursor, Codex, GitHub Copilot , or similar ( must have ). Very good English communication skills ( B2+/C1 , must have ). Nice to have Experience building SaaS products. Experience developing on-premise software solutions. Recruitment process The recruitment process includes a technical assignment (approximately 5 hours) . During the task, you are welcome and encouraged to use AI coding tools , as we value modern software development practices.

🏢 Summary: Fullstack Developer role focused on building and maintaining backend services in Node.js and frontend applications in React/Next.js, with occasional involvement in smart contract development. The position involves working with databases, APIs, and collaborating across backend and blockchain teams in an onsite environment. The offer is targeted at senior-level engineers with strong production experience. 🗂️ Requirements: Strong Node.js/NestJS backend experience, Minimum 5 years of backend development experience, Minimum 2 years maintaining production applications, Strong React and TypeScript skills, Experience with database and API integration, Ability to work onsite in Warsaw (100%), English level B2 or higher 📃 Skills: Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MongoDB, API, EVM, SVM 🏢 Description: About BlockyDevs We build end-to-end applications combining fintech-grade reliability with Web3 innovation. Your Role As a Fullstack Developer, you’ll primarily work with Node.js on the backend, React on the frontend, and occasionally contribute to smart contract development. Responsibilities Develop backend services with *Node.js (NestJS/Express)** Build frontend apps with *React/Next.js + TypeScript** Work with databases (PostgreSQL, MongoDB) and APIs Occasionally contribute to smart contracts (EVM/SVM) Collaborate with design, backend, and blockchain teams Requirements Strong backend skills in Node.js/NestJS At least 5 years of experience in backend applications At least 2 years of experience in maintaining production applications Solid frontend skills in React + TypeScript Database and API integration knowledge Experience mentoring mid/junior developers English at least B2 level Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Nice-to-have Microservices and cloud deployment experience Web3 integrations knowledge Rates (B2B/Freelance) Senior: 120 - 180 PLN/h Recruitment Process 1. Intro Call (30 min) – Quick chat about your experience, expectations, and our projects. 2. Technical Interview / Task – Backend (Node.js) and frontend (React) focus, with some discussion of smart contracts. 3. Final Meeting – Culture/fit + project discussion. 4. Offer – Fast decision if it’s a match. 5. Process usually takes 2–3 weeks . 6. Feedback after each stage within a few days

🏢 Summary: Remote Full-Stack Software Engineer role focused on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The position involves end-to-end feature ownership, customer collaboration, and development of secure, high-performance systems. The engineer will work with Python, FastAPI, React, and cloud-native tools in a distributed team. 🗂️ Requirements: Approximately 5 years of professional software development experience, Strong backend development experience with Python and FastAPI, Experience with NGINX, Strong frontend development skills with React and TypeScript, Experience with Vite, Experience with MSSQL, Experience with SQLAlchemy, Hands-on experience with Docker, Hands-on experience with Kubernetes, Experience designing and consuming REST APIs, Experience with relational databases, Ability to design secure, scalable systems, Fluent English communication skills, EU citizenship, Residence in Poland 📃 Skills: Python, FastAPI, NGINX, React, TypeScript, Vite, MSSQL, SQLAlchemy, Docker, Kubernetes, REST, SQL, CI/CD, Cloud 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking a highly experienced Full-Stack Software Engineer to join a remote development team. The role focuses on designing, building, and maintaining scalable web applications using modern backend and frontend technologies. The ideal candidate is autonomous, proactive, and comfortable working directly with customers to translate business needs into robust technical solutions. Project information: Type of project: IT Services Office location: Poland Work mode: Remote Budget: 140-160 PLN net /h - b2b Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on candidate availability) Project scope: Design, develop, and maintain backend services and REST APIs using Python and FastAPI Build modern, responsive frontend applications using React, TypeScript, and Vite Own features end-to-end, from backend logic to frontend user interfaces Collaborate directly with customers and stakeholders to gather requirements and provide technical guidance Design and optimize database schemas and queries using MSSQL and SQLAlchemy Deploy, operate, and maintain applications using Docker and Kubernetes Ensure best practices in security, performance, scalability, and maintainability Participate in architecture discussions and contribute to technical decision-making Troubleshoot production issues and provide reliable operational support Work closely with product, design, and engineering teams to deliver high-quality solutions on time Requirements: Approximately 5 years of professional software development experience Strong autonomy and ability to manage tasks with minimal supervision Proven experience in customer-facing or stakeholder-facing roles Solid backend development experience with Python, FastAPI, and NGINX Strong frontend development skills with React, TypeScript, and Vite Experience working with relational databases, particularly MSSQL, and ORM tools like SQL Alchemy Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes Understanding of secure, scalable, and maintainable system design Experience in cloud environments (optional) Knowledge of CI/CD pipelines and DevOps best practices (optional) Experience working in agile or product-driven teams (optional) Strong verbal and written communication skills in English Self-driven, accountable, and results-oriented Comfortable working directly with customers and taking ownership of delivered solutions Team-oriented mindset with a proactive approach to problem-solving We offer: Remote working model Full-time job agreement based on b2b contract Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Senior Frontend Software Engineer role focused on building and delivering cloud-based software using modern JavaScript technologies, React, and Software Craftsmanship practices in a remote-first environment. The position involves end-to-end software development, collaboration with international teams, and working with distributed systems and cloud platforms. Candidates will contribute to scalable solutions while leveraging AI-assisted development tools and clean architecture principles. 🗂️ Requirements: 5+ years of professional experience with JavaScript, Experience with Modern JavaScript, Experience with TypeScript, Experience with React, Experience with RxJS, Experience with Node, Experience with Mocha, Experience with Express, Experience with Enzyme, Understanding of distributed systems, Understanding of microservices, Understanding of event-driven architectures, Experience with cloud platforms, AI-assisted software development experience, Ability to design, test, deploy, and maintain cloud-based systems 📃 Skills: JavaScript, TypeScript, React, RxJS, Node, Mocha, Express, Enzyme, AWS, GCP, Azure, Microservices, Cloud, Claude 🏢 Description: We are looking for a Senior Frontend Software Engineer who is hungry to deliver quality software at pace, by utilising the latest technology trends and modern Software Craftsmanship techniques. Who are we ? We are a remote-first boutique software house company founded by a group of seasoned software experts (average experience in the team is 12 years). What connected all of us, despite a long-term relationship, is a passion for building Great Software that matters. We believe in people, so this is why the key values of Shaped Thoughts are autonomy and trust. Our people have a real and direct impact on what and how we build things. We put extra effort into ensuring everyone can make a difference and grow among other experts. Qualifications: Modern JS, TypeScript, React, RxJS, Node, Mocha, Express, Enzyme 5+ years of professional experience with JavaScript Understanding of distributed systems, microservices, and event-driven architectures Experience with cloud platforms (AWS / GCP / Azure) AI-assisted software development experience As a part of the team you will : Design, implement, code review, test and deploy cloud-based systems Develop software from start to finish - you ship it, you run it! Collaborate with other international teams on paving the way for a successful delivery Work closely with senior stakeholders on identifying business requirements and shaping the product Deliver quality technical solutions that come from a robust design and clean architecture Build & improve the software delivery process using tools such as Claude Code How do we work? We work as a team - all people can freely exchange knowledge and tasks, that’s why we’re looking for strong team players We believe in continuous improvement (Kaizen mindset) We’re happy to share knowledge and spend time learning our domain and new technologies We value asynchronous communication for work, however we meet in person to improve our personal relationships What do we offer ? Being a part of a strong senior team with an ability to learn and exchange knowledge Remote-first work environment (or you can work from our office in Wroclaw if you fancy :-) B2B rate 140-190 PLN / hour, depending on your level of expertise Open-ended B2B contract or contract of employment Recruitment process It consists of the following stages: CV screening Tech screening (45 min) Live coding session (1.15h) The last stage is F2F and requires on-site presence in one of the major cities: Wrocław, Poznań, Katowice, Kraków, Warszawa or Gdańsk. We actively encourage AI-assisted development in our daily work. However, during recruitment, we want to assess your individual skills - please don't use AI assistance unless explicitly permitted for a given stage.

🏢 Summary: Onsite Fullstack Developer role focused on building scalable, production-ready web applications using Java Spring and Node.js on the backend and React on the frontend. The position involves developing REST APIs, integrations, and high-performance systems with relational databases, contributing to architecture and technical decisions. Work is 100% onsite in Warsaw under a B2B contract. 🗂️ Requirements: Ability to work 100% onsite in Warsaw, Commercial experience with Java, Commercial experience with Spring Boot, Commercial experience with Node.js, Experience with React, Experience with TypeScript, Knowledge of PostgreSQL, Knowledge of MySQL, Knowledge of MariaDB, Experience building production applications, Understanding of REST APIs, Understanding of backend architecture, English B2 level or higher 📃 Skills: Java, Spring, SpringBoot, Node.js, NestJS, Express, React, Next.js, TypeScript, PostgreSQL, MySQL, MariaDB, REST, Git, Docker, CI/CD 🏢 Description: 📍 Warsaw (Onsite – near Metro Plac Wilsona) 💼 B2B About Silk Software House We build modern, scalable applications with fintech-grade reliability and strong backend architecture. Our projects focus on high-performance web platforms and integrations using Java Spring and Node.js ecosystems. Your Role As a Fullstack Developer, you’ll primarily work with Java Spring and Node.js on the backend, and React on the frontend. You’ll collaborate closely with backend and frontend engineers to deliver scalable production-ready applications. Responsibilities Develop backend services using Java / Spring Boot and Node.js (NestJS / Express) Build frontend applications with React / Next.js + TypeScript Design and maintain REST APIs and integrations Work with relational databases including PostgreSQL, MySQL, and MariaDB Collaborate with designers, backend developers, and product teams Participate in architecture and technical decision-making Maintain and improve production applications Requirements Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Commercial experience with Java / Spring Boot, Node.js backend development Experience with React + TypeScript Good knowledge of relational databases (PostgreSQL, MySQL, MariaDB) Experience building and maintaining production applications Understanding of API integrations and backend architecture English at least B2 level Nice to have Experience with microservices architecture Cloud deployment experience CI/CD knowledge Docker and containerization experience Experience with scalable backend systems Tech Stack Area: Technologies Backend: Java Spring Boot, Node.js, NestJS, Express Frontend: React, Next.js, TypeScript Databases: PostgreSQL, MySQL, MariaDB DevOps: Docker, CI/CD Tools: Git, REST APIs Recruitment Process 1. Intro Call – Quick chat about your experience, expectations, and our projects 2. Technical Interview / Task – Backend and frontend discussion focused on Java Spring, Node.js, and React 3. Final Meeting – team fit and project discussion 4. Fast feedback after each stage within a few days. 5. Process usually takes 2–3 weeks .

🏢 Summary: Senior Fullstack Software Engineer & Tech Lead role focused on designing and delivering scalable, cloud-native applications on AWS using modern full-stack technologies. The position combines hands-on development with technical leadership, architecture design, and infrastructure automation. The engineer will drive end-to-end solutions, from UI and APIs to CI/CD and Infrastructure-as-Code. 🗂️ Requirements: 8+ years of software engineering experience, Strong experience in full-stack development, Expertise in TypeScript, Experience with React, Hands-on experience with AWS, Experience with serverless services (Lambda, Batch), Knowledge of Infrastructure-as-Code (Terraform or CloudFormation), Experience with RESTful API development, Experience with relational databases, Experience with NoSQL databases, Experience with CI/CD pipelines, Ability to lead technical design and mentor engineers 📃 Skills: TypeScript, React, AWS, Lambda, Batch, Terraform, CloudFormation, REST, SQL, SQLServer, DB2, Sybase, MongoDB, Elasticsearch, CI/CD 🏢 Description: Senior React Developer with AWS Join a global leader in financial technology as a Senior React Developer with AWS, shaping the future of innovative, cloud-native web applications. In this high-impact role, you'll spearhead the design and development of cutting-edge solutions at a major international institution, collaborating with cross-functional teams across Warsaw, London, New York, and India. Be part of a forward-thinking environment driving a transformative cloud migration strategy, leveraging AI and modern development practices to deliver scalable, high-performance platforms. What You'll Do: Architect and engineer modern web applications using React, TypeScript, and AWS Lead technical decision-making and provide architectural guidance to the development team Develop and maintain serverless solutions with AWS Lambda, Batch, and CloudWatch Write Infrastructure-as-Code with Terraform to streamline deployment and infrastructure management Collaborate closely with designers, product managers, and stakeholders to translate requirements into robust solutions Support migration of legacy systems to cloud-native, React-based architectures Optimize CI/CD pipelines for automated, efficient deployment Work with cloud storage solutions such as S3, MongoDB, and ElasticSearch Required Skills: 8+ years of practical software engineering experience Strong expertise in React and TypeScript Hands-on experience with AWS services, especially Lambda, Batch, and CloudWatch Experience with Terraform or similar Infrastructure-as-Code tools Solid understanding of relational and non-relational databases (MongoDB, ElasticSearch, S3) Knowledge of RESTful API design and development Excellent communication skills, capable of engaging with non-technical stakeholders Bachelor’s degree in Computer Science, Engineering, Mathematics, or related field Nice to Have Skills: Experience with CI/CD pipelines Familiarity with serverless architecture best practices Knowledge of AI development tooling in cloud environments Preferred Education and Experience: Bachelor’s or higher degree in a technical discipline 8+ years of professional experience in software engineering, with a focus on full-stack and cloud-native solutions Other Requirements: Ability to work in an on-site environment in the centre of Warsaw Willingness to contribute to a dynamic, global team driven by innovation and excellence Bring your expertise to a role that truly makes an impact - apply now and help shape the future of financial technology!