Senior Fullstack Developer (React, Node.js)

🏢 Summary: Long-term international project for a Senior Node.js Developer with React focused on building and developing scalable web applications using modern technologies. The role involves backend and frontend development within a dynamic team environment. The project leverages cloud infrastructure and CDN solutions. 🗂️ Requirements: Strong knowledge of Node.js, Commercial experience with React.js, Knowledge of Next.js, Experience with AWS, Knowledge of CDN solutions, Experience with Heroku, Ability to build and develop scalable web applications 📃 Skills: Node.js, React, Next.js, AWS, CDN, Heroku 🏢 Description: Poszukujemy doświadczonego Senior Node.js Developera z React , który dołączy do długoterminowego projektu realizowanego w międzynarodowym środowisku. Jeśli dobrze odnajdujesz się w nowoczesnych technologiach, lubisz budować skalowalne aplikacje i pracować w dynamicznym zespole — zapraszamy do kontaktu. Wymagania Bardzo dobra znajomość Node.js Doświadczenie komercyjne z React.js Znajomość Next.js Doświadczenie w pracy z Amazon Web Services (AWS) Znajomość rozwiązań typu CDN Doświadczenie z Heroku Umiejętność tworzenia i rozwijania skalowalnych aplikacji webowych Dobra komunikacja i samodzielność w działaniu Mile widziane Doświadczenie w optymalizacji wydajności aplikacji Znajomość procesów CI/CD Doświadczenie z architekturą mikroserwisową lub systemami rozproszonymi

🏢 Summary: Senior Full-Stack Developer role focused on enhancing a platform using React and TypeScript on the frontend and .NET/C# with SQL Server on the backend. The position emphasizes strong frontend expertise while maintaining sufficient backend knowledge for independent task execution. Experience with legacy systems is considered an advantage. 🗂️ Requirements: 5+ years full-stack development experience (Mid) or 10+ years (Senior), Proficiency in React, Proficiency in TypeScript, Strong knowledge of modern JavaScript, Solid knowledge of C# and .NET, Ability to work with SQL Server 📃 Skills: React, TypeScript, JavaScript, C#, .NET, SQL, SQLServer, ClassicASP 🏢 Description: Summary: A senior full-stack developer position focused on enhancing our platform through modern technologies, primarily using React and TypeScript on the frontend and .NET/C# with SQL Server on the backend. Main Responsibilities: Strengthen the focus on React and TypeScript as the primary and most critical skills, with a solid foundation in modern JavaScript. Utilize .NET/C# and SQL Server as supporting skills to ensure self-sufficiency in day-to-day tasks without primary responsibility for complex backend or database optimization. Leverage knowledge of legacy technologies, such as Classic ASP, for understanding existing logic as a nice-to-have skill. Key Requirements: At least 5 years of experience (Mid-level) or 10 years (Senior-level) in full-stack development. Proficiency in React and TypeScript. Solid foundation in modern JavaScript and C# / .NET. Nice to Have: Experience with legacy systems like Classic ASP.

🏢 Summary: Senior Fullstack Engineer role focused on building modern, scalable web applications using React and Node.js, with strong emphasis on frontend development. The position covers the full application stack, including backend services, API design, and data management. You will collaborate with cross-functional teams to deliver high-quality, accessible, and high-performance digital products. 🗂️ Requirements: Strong commercial experience with React, Strong commercial experience with Node.js, Experience with React Router, Experience with TanStack Query, Experience integrating Headless CMS (preferably Contentful), Understanding of API design principles, Experience with PostgreSQL, Experience with Redis, Experience with Vitest, Experience with Playwright, Knowledge of WCAG accessibility standards, Experience with performance optimisation, Ability to work across full software development lifecycle 📃 Skills: React, Node.js, TypeScript, Fastify, PostgreSQL, Redis, React Router, TanStack Query, Contentful, Vitest, Playwright, WCAG, SAP Gigya, Salesforce 🏢 Description: Senior Fullstack Engineer (React & Node.js) About the Role We are looking for a Senior Fullstack Engineer to join a product team building modern, scalable web applications and digital experiences. You will work across the entire application stack, from user-facing interfaces to backend services and integrations. The role has a strong focus on frontend engineering while also involving backend development, API design, and data management. You will collaborate closely with product, design, and engineering teams to deliver high-quality, accessible, and performant applications. Responsibilities Develop and maintain modern web applications using React, Node.js, and TypeScript. Build scalable and reusable UI components integrated with a design system. Develop and maintain backend services and APIs using Node.js and Fastify. Integrate applications with CMS platforms and third-party services. Work with PostgreSQL and Redis to support application functionality and performance. Write and maintain automated tests, including unit and end-to-end tests. Ensure high standards of accessibility, performance, and code quality. Participate in architectural discussions and contribute to engineering best practices. Requirements Strong commercial experience in fullstack development using React and Node.js. Solid experience with modern frontend technologies, including React Router and TanStack Query. Experience integrating with Headless CMS platforms, preferably Contentful. Good understanding of API design and backend development principles. Experience with PostgreSQL and Redis. Experience with automated testing frameworks such as Vitest and Playwright. Strong understanding of accessibility standards (WCAG) and performance optimisation. Ability to work across the entire software development lifecycle in a product-oriented environment. Nice to Have Experience with authentication and identity platforms such as SAP Gigya. Experience integrating Salesforce products or loyalty platforms. Experience in highly scalable, customer-facing digital products. Experience working in agile, cross-functional product teams.

🏢 Summary: Senior Node.js Developer role focused on delivering and optimizing client projects using modern JavaScript technologies and AWS. The position involves full-cycle development, testing, and code quality assurance in collaboration with client teams. The role emphasizes high coding standards, best practices, and effective use of Generative AI in software development. 🗂️ Requirements: Minimum 5 years of experience with JavaScript and TypeScript, Minimum 5 years of experience with Node.js, Strong knowledge of React, Experience with AWS, Ability to write unit tests, Knowledge of SOLID, DRY, TDD principles, English proficiency at minimum B2 level, Fluent Polish, Experience using Generative AI in software development process 📃 Skills: Node.js, JavaScript, TypeScript, React, AWS, Tailwind, HTML, CSS, TDD, SOLID, DRY, GenerativeAI 🏢 Description: Szukamy doświadczonej osoby, która dołączy do Future Processing jako Senior Node.js Developer i razem z naszym zespołem będzie realizować projekty dla naszych klientów. Szukamy Ciebie, jeśli: posiadasz min. 5 lat doświadczenia w programowaniu w JavaScript/TypeScript oraz Node.js, bardzo dobrze znasz bibliotekę React.js, masz doświadczenie z Amazon Web Services (AWS), umiesz pisać testy jednostkowe, znasz dobre praktyki np.: SOLID, DRY, TDD, posługujesz się językiem angielskim na poziomie min. średniozaawansowanym (min. B2) oraz swobodnie komunikujesz się w języku polskim , jesteś osobą otwartą, komunikatywną i samodzielną w realizacji zadań, masz proaktywną postawę i nie boisz się wyzwań w projekcie. świadomie wykorzystujesz Generative AI w procesie wytwarzania oprogramowania oraz w decyzjach projektowych i technologicznych. Na tym stanowisku będziesz: współpracować z zespołem klienta, uczestniczyć w tworzeniu rozwiązań, omawianiu problemów programistycznych, tworzyć oprogramowanie, testować i opiniować rozwiązania dla klienta, pracować z takimi technologiami jak: Node , React, Javascript, Typescript, AWS, Tailwind, HTML/CSS/JS, pracować nad usprawnieniem i optymalizacją procesów i dostarczanych rozwiązań, dbać o jakość i bezpieczeństwo kodu.

🏢 Summary: Senior-level role focused on building and maintaining scalable, data-driven web applications using React, TypeScript, Node.js, NestJS, and MSSQL. The position involves full-stack development, database design, data aggregation, and ensuring high performance and code quality. It also includes technical leadership, code reviews, and collaboration within cross-functional teams. 🗂️ Requirements: Bachelor’s degree in Computer Science or related field or equivalent experience, 5+ years of software development experience, Strong experience with React and TypeScript, Strong experience with Node.js and NestJS, Experience with MSSQL database design and optimization, Experience building data-driven applications and data aggregations, Knowledge of RESTful APIs, Understanding of microservices architecture, Experience with Git version control, Experience writing unit tests 📃 Skills: React, TypeScript, Node.js, NestJS, MSSQL, REST, Microservices, Git, Azure, Terraform, Databricks, Jenkins 🏢 Description: As a Senior React and Node.js Developer, you will leverage your expertise in React , TypeScript , NestJS , Node.js , and MSSQL to build scalable and efficient applications. You will play a pivotal role in the design, development, and maintenance of our web applications, ensuring they are robust, user-friendly, and data-driven. Main Responsibilities: Develop user interfaces using React and TypeScript with a focus on performance and scalability. Build and maintain back-end services using Node.js and NestJS. Design and manage MSSQL databases, ensuring data integrity and performance optimization. Implement data aggregations to drive meaningful insights and analytics. Collaborate with cross-functional teams to define and implement application features and functionalities. Write unit tests to ensure code quality and maintainability. Conduct code reviews and provide leadership and mentorship to junior developers. Troubleshoot and resolve application issues to ensure optimal performance. Stay current with industry trends and technologies to continuously improve development processes. Key Requirements: Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). 5+ years of experience in software development with a strong focus on React, TypeScript, NestJS, Node.js, and MSSQL. Proven experience in developing and managing data-driven applications, including data aggregations. Strong understanding of RESTful APIs and microservices architecture. Familiarity with version control systems (e.g., Git). Excellent problem-solving skills and attention to detail. Strong communication skills and ability to work collaboratively in a team-oriented environment. Demonstrated leadership experience in guiding and mentoring team members. Nice to Have: Experience with cloud platforms such as Azure. Familiarity with Infrastructure as Code tools like Terraform. Knowledge of Databricks for data analytics and processing. Experience with CI/CD tools, such as Jenkins. Other Details: This position offers flexibility in working arrangements, providing opportunities to work remotely. You will be part of an innovative team striving to enhance development processes and deliver high-quality software solutions.

🏢 Summary: Fullstack Developer role for an international heating solutions client, focused on building advanced planning applications using React and Java. The position involves developing backend APIs, responsive interfaces, and managing the full platform lifecycle with CI/CD and cloud technologies. The role requires strong experience in enterprise Java, modern frontend frameworks, automated testing, and AI-assisted development workflows. 🗂️ Requirements: Strong proficiency in React, Strong proficiency in Next.js, Strong proficiency in Node.js with SSR, Advanced programming experience in Java, Advanced programming experience in TypeScript, Experience with Spring Boot, Experience integrating LLMs and AI tools, Experience designing and consuming REST APIs, Experience with relational databases, Experience with NoSQL databases, Experience with MS Azure, Experience with Docker, Experience with Kubernetes, Experience with Terraform, Experience with GitHub Actions, Experience with Gradle, Experience writing Unit tests, Experience writing Integration tests, Experience writing E2E tests, Understanding of Agile (Scrum or Kanban), English level minimum B2, Willingness to travel occasionally to Katowice 📃 Skills: React, Next.js, Node.js, Java, TypeScript, JavaScript, Spring, SpringBoot, REST, SQL, NoSQL, Azure, Docker, Kubernetes, Terraform, GitHubActions, Gradle, LLM, AI, Scrum, Kanban, Vue.js 🏢 Description: About the project For an international client from the heating solutions industry, we are looking for an experienced Fullstack Developer who feels comfortable working with React and Java. Our expectations Strong proficiency in React, Next.js, and Node.js, including Server-Side Rendering (SSR). Advanced, hands-on programming experience with both Java and TypeScript / JavaScript. Deep knowledge of enterprise software development using Java and Spring Boot technologies. Experience integrating LLMs and AI tools into daily workflows to optimize development speed. Mastery of REST APIs and experience with relational/NoSQL databases, especially within MS Azure. Hands-on experience with Docker, Kubernetes, Terraform, and pipeline automation via GitHub Actions and Gradle. Direct experience writing automated Unit, Integration, and E2E tests. Strong understanding of Agile principles including Scrum or Kanban. Very goo command of English (min. B2 level) Willingness to undertake occasional travel to the client's office (Katowice) approximately once per quarter. Welcome Skills Experience with Vue.JS. Key tasks Design advanced planning applications in close collaboration with cross-functional teams. Develop robust backend APIs for resource scheduling, allocation logic, and core modules. Create responsive interfaces focused on performance, security, data visualization, and accessibility. Build your own AI-based work environment using advanced developer tools to maximize efficiency. Manage the platform lifecycle from architectural strategy to operations and CI/CD practices. Design and implement automated test scenarios to guarantee platform success. Maintain active communication with the Technical Product Owner and Product Management organization to align priorities.

🏢 Summary: Senior Full Stack Developer role in a greenfield web application project, responsible for end-to-end architecture and key technical decisions. The position involves building and integrating scalable frontend and backend solutions using modern JavaScript frameworks and BFF architecture. The developer will shape CI/CD processes, ensure code quality, and integrate external systems and CMS platforms. 🗂️ Requirements: Minimum 5 years commercial experience as Fullstack Developer, Strong knowledge of Node.js, Experience with NestJS or Express.js or Fastify, Good knowledge of TypeScript, Experience with React or Next.js or Angular, Experience with REST API or GraphQL integrations, Experience with CMS integrations, Knowledge of BFF architecture, Experience in greenfield projects, Experience with CI/CD pipelines, Communicative English B1/B2 📃 Skills: Node.js, TypeScript, React, Next.js, Angular, NestJS, Express, Fastify, REST, GraphQL, CMS, BFF, Git, CI/CD, ESLint, Prettier, Jest, Cypress, Contentful, Strapi, Sanity, AWS, Azure, GCP, Docker, Sentry, Datadog, NewRelic 🏢 Description: Senior Full Stack Developer (React/Angular, Node.js) m/k/n 📍 Warszawa / model hybrydowy (1 dzień w tygodniu w biurze) Poszukujemy doświadczonego Senior Fullstack Developera (Node.js) do współpracy przy nowoczesnym projekcie realizowanym dla renomowanego studia digitalowego specjalizującego się w zaawansowanych rozwiązaniach webowych i doświadczeniach cyfrowych dla globalnych marek. Projekt Greenfieldowy projekt aplikacji webowej budowanej od podstaw. Rola obejmuje realny wpływ na kierunek techniczny rozwiązania oraz kluczowe decyzje architektoniczne. Zakres obowiązków: projektowanie architektury aplikacji end-to-end dobór technologii i najlepszych praktyk developerskich budowa backendu oraz warstwy frontendowej konfiguracja procesów CI/CD integracje z systemami zewnętrznymi (API, CMS, narzędzia biznesowe) migracje danych i treści code review oraz wsparcie mniej doświadczonych developerów dbanie o jakość kodu, wydajność i skalowalność rozwiązania Wymagania: minimum 5 lat doświadczenia komercyjnego jako Fullstack Developer bardzo dobra znajomość Node.js doświadczenie z frameworkami backendowymi: NestJS / Express.js / Fastify dobra znajomość TypeScript doświadczenie frontendowe w React / Next.js lub Angular doświadczenie w integracjach REST API / GraphQL / CMS znajomość architektury BFF (Backend for Frontend) doświadczenie w projektach budowanych od zera (greenfield) swobodna współpraca z zespołami IT i biznesem komunikatywny angielski (min. B1/B2) Stack technologiczny: Frontend: TypeScript React / Next.js / Angular Backend: Node.js NestJS / Express / Fastify BFF Architecture Narzędzia: Git CI/CD ESLint / Prettier Jest / Cypress Headless CMS (Contentful, Strapi, Sanity) Mile widziane: doświadczenie z chmurą: AWS/ Azure / GCP Docker / konteneryzacja monorepo optymalizacja performance (Core Web Vitals) Design Systems monitoring: Sentry / Datadog / New Relic Szukamy osoby, która: działa samodzielnie i potrafi podejmować decyzje technologiczne dobrze odnajduje się w środowisku dynamicznych projektów ma doświadczenie w budowie produktów od podstaw myśli długofalowo: utrzymanie, rozwój, skalowalność dba o jakość kodu i wysokie standardy techniczne Oferujemy: realny wpływ na architekturę i dobór technologii udział w ambitnym projekcie greenfieldowym współpracę z doświadczonym zespołem ekspertów digitalowych elastyczny model pracy hybrydowej możliwość kontynuacji współpracy po zakończeniu projektu

🏢 Summary: Senior Full Stack Developer role focused on building enterprise-grade applications for capital markets and risk using React and C# .NET Core. The position involves developing scalable microservices, REST APIs, modern web UIs, and data-driven solutions in a cloud environment. Responsibilities include CI/CD implementation, event-driven architecture, cloud migration, and Power BI reporting. 🗂️ Requirements: Strong experience with React and TypeScript, Strong experience with C# and .NET Core, Experience building REST APIs, Experience developing microservices and distributed systems, Experience with CI/CD pipelines, Experience with Azure or AWS cloud platforms, Experience with Power BI and data modeling, Strong SQL and database knowledge, Experience with Docker and Kubernetes, Experience in capital markets domain especially credit risk or market risk, Strong understanding of software architecture and system design 📃 Skills: React, TypeScript, JavaScript, C#, DotNetCore, REST, Microservices, Azure, AWS, PowerBI, SQL, Docker, Kubernetes, Kafka, AzureDevOps, Jenkins, GitHubActions 🏢 Description: About the Role We are looking for a Senior Full Stack Developer with strong expertise in React on the frontend and C# .NET Core on the backend to build and enhance enterprise-grade applications in the capital markets and risk domain. The role involves developing scalable microservices, modern web applications, and data-driven solutions in a cloud environment. Key Responsibilities Design, develop, and maintain full stack applications using React and C# .NET Core Build and maintain REST APIs and microservices in distributed environments Develop modern, responsive UI components using React, TypeScript, and modern frontend patterns Work closely with business stakeholders in capital markets and risk domains (credit risk, market risk) Develop and maintain Power BI dashboards and data models for business reporting Implement and maintain CI/CD pipelines and automated deployment processes Contribute to event-driven architecture using tools such as Kafka or similar messaging technologies Participate in cloud migration and modernization initiatives (Azure or AWS) Ensure code quality through testing, code reviews, and best engineering practices Mentor junior developers and contribute to architectural decisions Requirements Strong experience with React, JavaScript/TypeScript Strong experience with C#, .NET Core, REST APIs Experience building microservices and distributed systems Experience with CI/CD tools (Azure DevOps, Jenkins, GitHub Actions) Experience with Azure or AWS Experience with Power BI and data modeling Strong SQL and database knowledge Experience with Docker / Kubernetes Experience working in capital markets , especially credit risk or market risk Strong understanding of software architecture and system design Excellent communication skills and experience working with business stakeholders

🏢 Summary: Fullstack Developer role focused on building and developing business software and SaaS solutions using .NET and React within a Scrum team. The position involves working with microservices architecture, Microsoft Azure, and maintaining development and production environments. The candidate will contribute to product development, system monitoring, and technical documentation. 🗂️ Requirements: Minimum 2 years commercial experience with C# and .NET, Good knowledge of .NET Core, Good knowledge of React JS, Good knowledge of TypeScript, Very good knowledge of SQL, Experience with microservices architecture, Experience working in a Scrum team, Ability to create technical documentation 📃 Skills: C#, .NET, .NETCore, React, TypeScript, SQL, Azure, Docker, Kubernetes, Scrum, Microservices 🏢 Description: Jako firma rekrutacyjna jesteśmy świadomi, że każdy solidny biznes napędzają ludzie z odpowiednio dopasowanymi kompetencjami. Nasz styl zarządzania i partnerskie podejście pozwalają nam na elastyczne dostosowanie się do Twoich potrzeb i zapewniają pełne wsparcie podczas współpracy. W związku z ciągłym rozwojem i dużą liczbą projektów rekrutacyjnych, jakie prowadzimy dla naszych Partnerów, szukamy osoby na stanowisko: Fullstack Developer (.NET + React) Zakres obowiązków: Rozwój oprogramowania dla klientów biznesowych Współudział w tworzeniu nowych produktów i rozwiązań SaaS Praca w zespole scrumowym i udział w ceremoniach projektowych Implementacja rozwiązań w technologiach C#, .NET, .NET Core, React JS i TypeScript Tworzenie i utrzymywanie aplikacji opartych o Microsoft Azure i architekturę mikroserwisową Definiowanie wymagań we współpracy z Product Ownerem i klientem Konfiguracja i utrzymanie środowisk developerskich oraz produkcyjnych Monitorowanie i rozwiązywanie błędów w systemach Wymagania: Minimum 2 lata doświadczenia komercyjnego w pracy z C# i .NET Dobra znajomość .NET Core oraz React JS / TypeScript Bardzo dobra znajomość SQL Doświadczenie w pracy z architekturą mikroserwisową Umiejętność pracy w zespole scrumowym Umiejętność przygotowywania dokumentacji technicznej Systematyczność i samodzielność Mile widziane: Znajomość Docker lub Kubernetes Doświadczenie w projektach z branży ubezpieczeniowej Znajomość środowiska Microsoft Azure Oferujemy: Prywatną opiekę medyczną Dofinansowanie karty sportowej Dofinansowanie do szkoleń i programy rozwojowe Dodatkowy pakiet benefitów

🏢 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/