Senior Fullstack Developer (React, Typescript)

🏢 Summary: Early-career, office-based web development role building real CRM, business, e-commerce, and client-portal applications with React, Next.js, and TypeScript. The offer provides hands-on work with AI tools, direct collaboration with experienced teammates, rapid responsibility, and benefits including healthcare, Multisport, and daily lunches. 🗂️ Requirements: Student in IT or a related field, or early-career candidate, Basic React knowledge, Basic JavaScript knowledge, Own projects demonstrated through GitHub or a portfolio, Analytical thinking and independent problem-solving, Proactive interest in building products, Fluent spoken and written English, Ability to understand and validate AI-generated code, Availability for office-based work in OBC, Gdansk 📃 Skills: React, JavaScript, GitHub, Next.js, TypeScript, APIs, Copilot, ChatGPT, Gemini 🏢 Description: We’re looking for someone at the beginning of their career — but not starting from zero. If you already build things, experiment, and want to grow fast — keep reading. What you’ll do: build web applications using React / Next.js / TypeScript work on real projects (CRM systems, business tools, e-commerce platforms, and client portals) use and integrate AI tools in real development workflows learn by doing — not by “training tasks” collaborate directly with experienced team members Who we’re looking for: you’re a student (IT or related field) or early in your career you know the basics of React and JavaScript you have your own projects (GitHub / portfolio — required) you can think analytically and solve problems independently you’re curious, proactive, and actually enjoy building things your English level allows you to communicate freely (spoken and written) Important: we work a lot with AI tools — but we expect you to understand what the AI produces, not just copy-paste we value business thinking, not just coding — you should care why something is built, not only how Nice to have: Next.js / TypeScript working with APIs experience using AI tools (Copilot, ChatGPT, Gemini, etc.) What it’s like to work with us: office-based work (OBC, Gdansk) — we value close, in-person collaboration we believe the best learning happens side by side, not asynchronously fast-paced environment, minimal bureaucracy real impact on products from day one What we offer: very fast growth (real responsibility early on) modern tech stack (AI, automation, scalable systems) private healthcare Multisport daily lunches relaxed, startup-like atmosphere What we’re NOT looking for: candidates without any projects people whose only experience is university coursework those who need step-by-step instructions for everything How to apply: GitHub / portfolio CV your answer to the question above

🏢 Summary: B2B React Developer contract for building and maintaining a production-grade, real-time chat application. The hybrid role offers up to 160 zł/h and requires onsite work in Cracow six times per month. 🗂️ Requirements: Production experience with React, Production experience with TypeScript, Ability to build real-time streaming UIs, Experience managing complex client-side state, Familiarity with AI-assisted development tools, Availability for hybrid work in Cracow six times per month 📃 Skills: React, TypeScript, Tailwind, shadcn/ui, Radix, Copilot, Cursor, Claude, AI 🏢 Description: Summary The React Developer role focuses on building a production-grade React web application designed for an enhanced chat experience, contributing significantly to the project's success. What we offer: Start date: ASAP Type of contract: B2B Contract Work Model: Hybrid (6 times per month work from office in Cracow) Salary grids: up to 160 zł/h Responsibilities: Develop and maintain a production-level chat application using React. Implement features to manage complex client-side states effectively. Utilize modern design systems like Tailwind CSS, plusshadcn/ui, or Radix UI. Leverage AI-assisted coding tools to enhance productivity and application functionality. Collaborate closely with stakeholders to ensure the product meets business requirements. Key Requirements: Strong production experience with React and TypeScript. Proven ability to build real-time streaming UIs. Experience managing complex client-side state. Familiarity with AI-assisted development tools such as Copilot, Cursor, or Claude Code. Nice to Have: Experience with Dynamics 365 / Dataverse. Knowledge of streaming AI APIs (OpenAI, Azure OpenAI, SSE-based LLMs)

🏢 Summary: Oferta dotyczy długoterminowego, w pełni zdalnego rozwoju aplikacji mobilnej dla globalnej platformy gamingowo-rozrywkowej. React Native Developer będzie tworzyć nowe funkcje i uczestniczyć w migracji produktu z React do React Native, mając wpływ na decyzje techniczne w podejściu Mobile First. 🗂️ Requirements: Minimum 4 lata komercyjnego doświadczenia z React Native, Bardzo dobra znajomość React, Praktyczne doświadczenie z JavaScript, Praktyczne doświadczenie z TypeScript, Doświadczenie w tworzeniu aplikacji mobilnych na Android i iOS, Samodzielna realizacja zadań, Biegła znajomość języka polskiego i angielskiego — C1 📃 Skills: ReactNative, React, JavaScript, TypeScript, Android, iOS 🏢 Description: Dołącz do naszego zespołu realizującego dł ugoterminowy projekt dla globalnej platformy z branży gamingowej i rozrywkowej. Poszukujemy React Native Developera , który będzie uczestniczył w rozwoju nowoczesnej aplikacji mobilnej wykorzystywanej przez miliony użytkowników na całym świecie. To doskonały moment, aby dołączyć do projektu. Zespół przejmuje rozwój produktu od zewnętrznego dostawcy, dzięki czemu będziesz mieć realny wpływ na kierunek rozwoju aplikacji, podejmowane decyzje techniczne oraz sposób realizacji nowych funkcjonalności. Projekt realizowany jest w podejściu Mobile First . Głównym celem jest r ozwój nowych funkcjonalności oraz migracja aplikacji z React do React Native. Prace utrzymaniowe stanowią jedynie niewielką część codziennych obowiązków. Zakres obowiązków rozwój i implementacja nowych funkcjonalności w aplikacji mobilnej, udział w migracji aplikacji z React do React Native, współpraca z zespołami Android i iOS, dbanie o wysoką jakość kodu oraz wydajność aplikacji, udział w projektowaniu i rozwijaniu rozwiązań technicznych. Wymagania minimum 4 lata komercyjnego doświadczenia w tworzeniu aplikacji z wykorzystaniem React Native, bardzo dobra znajomość React, praktyczne doświadczenie z JavaScript oraz TypeScript, doświadczenie w pracy nad aplikacjami mobilnymi dla Android i iOS, umiejętność samodzielnej realizacji powierzonych zadań, znajomość języka polskiego i angielskiego na poziomie biegłym (C1), doświadczenie z pracą w zespołach Agile będzie dodatkowym atutem. Mile widziane: doświadczenie w tworzeniu i rozwijaniu aplikacji mobilnych o dużej skali, doświadczenie w projektach z branży iGaming, doświadczenie przy produktach z obszaru Casino lub Poker, znajomość rozwiązań i standardów stosowanych w branży gier online. Tech Stack React Native, React, JavaScript, TypeScript, Android, iOS. Oferujemy pracę w 100% zdalną , długoterminowy projekt możliwość realnego wpływu na rozwój produktu i decyzje technologiczne, udział w projekcie realizowanym w podejściu Mobile First, współpracę z doświadczonym zespołem i wykorzystanie nowoczesnych technologii. Sam/a zobacz, dlaczego warto być w j-labs! Dołączysz do firmy stworzonej przez inżynierów dla inżynierów , która istnieje na rynku od 15 lat. Obecnie zatrudniamy ponad 500 osób . j-labs to stabilność i długofalowa współpraca – około 25% załogi to osoby pracujące już ponad 5 lata! Możesz zmienić projekt – rób to co lubisz, rozwijaj swoje kompetencje, zdobywaj nowe. Robimy dobre IT albo wcale . Technologie, w których pracujemy to m.in . Java 17/21,  Spring, Hibernate, Mikroserwisy,  AWS/Azure/GSP/,  Terraform, Docker, Kubernetes, Kafka Eksperci przyciągają ekspertów - średnie doświadczenie naszych inżynierów wynosi 12 lat , a 30% zostaje zatrudnionych z polecenia . Stawiamy na knowledge sharing i rozwój . Organizujemy Talk4Devs, meet’upy , dajemy Ci przestrzeń do budowania swojej marki osobistej jako prelegent, czy prowadzenia własnych projektów, których rezultaty możesz przedstawiać m.in . na naszym blogu. Dołącz do Gildii Technologicznej l ub stwórz własną - nasze community zrzeszają specjalistów w obszarach : Java , Kotlin, .NET, Frontend, Management, DevOps, Quality Assurance Mamy zakodowane, że jest czas pracy i czas nie pracy, więc bardzo dbamy o to, aby work life balance został zachowany. Otrzymaliśmy w tym roku certyfikat Great Place to Work (aż 80% odpowiedzi w ankiecie dotyczącej różnych obszarów wybierało najwyższe noty, jesteśmy w pierwszej 10 firm z najlepszym wynikiem)

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive frontend architecture, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, modern tooling, and influence over architectural decisions. 🗂️ Requirements: 4–5 years of professional software development experience, Commercial Java experience, Commercial Spring Framework experience, Commercial Spring Boot experience, Commercial React.js experience, Commercial TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity, Agile environment experience 📃 Skills: Java, Spring, SpringBoot, React, TypeScript, JavaScript, AWS, SQL, HTML5, CSS3, SCSS, Jest, Kafka, Hadoop, Spark, Next.js, Redux, Zustand 🏢 Description: ✅ Your responsibilities: Design, develop, and maintain scalable full stack applications using Java and React. Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. Design and implement scalable frontend architecture and reusable UI components. Collaborate closely with Product Owners, QA Engineers, and other development teams. Integrate frontend applications with REST APIs and backend microservices. Contribute to architectural decisions and technical discussions. Ensure application performance, scalability, security, and maintainability. Participate in code reviews, sprint planning, and Agile ceremonies. Support deployment automation, production operations, and troubleshooting. Mentor less experienced developers and promote engineering best practices. 🧠 Our requirements: Minimum 4–5 years of professional software development experience. Commercial experience with Java, Spring Framework, and Spring Boot. Commercial experience with React.js and TypeScript. Solid understanding of JavaScript (ES6+). Experience working with AWS in production environments. Understanding of microservices architecture. Hands-on experience with SQL and relational databases. Experience integrating and consuming REST APIs. Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. Experience with frontend testing using Jest and React Testing Library. Familiarity with modern frontend tooling and build processes. Ability to work independently, take ownership of delivered solutions, and contribute to system design. Excellent communication skills and experience working in Agile environments ⭐ Nice to have: Experience with Kafka or other event-driven architectures. Knowledge of Hadoop or Apache Spark. Experience with Next.js. Experience with Redux, Zustand, or similar state management solutions. Previous experience in Healthcare or Life Sciences projects. 🌟 What we offer: Long-term cooperation on an international project. Flexible working hours. Opportunity to influence architecture and technical decisions. Modern technology stack. Supportive, collaborative engineering culture. Learning and development opportunities. Modern equipment and comfortable working environment.

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive interfaces, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, influence on architecture, and development opportunities. 🗂️ Requirements: 4–5+ years of professional software development experience, Commercial Java experience, Spring Framework and Spring Boot experience, React.js and TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity 📃 Skills: Java, React, Spring, SpringBoot, SQL, AWS, TypeScript, JavaScript, HTML5, CSS3, SCSS, Jest, Microservices, REST, ReactTestingLibrary 🏢 Description: ✅ Your responsibilities: Design, develop, and maintain scalable full stack applications using Java and React. Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. Design and implement scalable frontend architecture and reusable UI components. Collaborate closely with Product Owners, QA Engineers, and other development teams. Integrate frontend applications with REST APIs and backend microservices. Contribute to architectural decisions and technical discussions. Ensure application performance, scalability, security, and maintainability. Participate in code reviews, sprint planning, and Agile ceremonies. Support deployment automation, production operations, and troubleshooting. Mentor less experienced developers and promote engineering best practices. 🧠 Our requirements: Minimum 4–5 years of professional software development experience. Commercial experience with Java, Spring Framework, and Spring Boot. Commercial experience with React.js and TypeScript. Solid understanding of JavaScript (ES6+). Experience working with AWS in production environments. Understanding of microservices architecture. Hands-on experience with SQL and relational databases. Experience integrating and consuming REST APIs. Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. Experience with frontend testing using Jest and React Testing Library. Familiarity with modern frontend tooling and build processes. Ability to work independently, take ownership of delivered solutions, and contribute to system design. Excellent communication skills and experience working in Agile environments ⭐ Nice to have: Experience with Kafka or other event-driven architectures. Knowledge of Hadoop or Apache Spark. Experience with Next.js. Experience with Redux, Zustand, or similar state management solutions. Previous experience in Healthcare or Life Sciences projects. 🌟 What we offer: Long-term cooperation on an international project. Flexible working hours. Opportunity to influence architecture and technical decisions. Modern technology stack. Supportive, collaborative engineering culture. Learning and development opportunities. Modern equipment and comfortable working environment.