Danfoss - Senior Frontend Developer

🏢 Summary: Lead Frontend Developer role focused on stabilizing and further developing a complex React-based application integrated with hardware devices via a proprietary communication protocol. The position involves cross-platform development (web, desktop with Electron, embedded), code refactoring, and architectural decision-making in a highly complex technical environment. The role requires close collaboration with backend and hardware teams and contribution to system architecture. 🗂️ Requirements: Very strong experience as Lead Frontend Developer, Advanced knowledge of React, Advanced knowledge of JavaScript, Experience with Electron, Experience integrating applications with hardware or devices, Understanding of cross-platform systems (web, desktop, embedded), Ability to work with low-level communication protocols, Experience analyzing and refactoring complex systems, Understanding of backend architecture and collaboration 📃 Skills: React, JavaScript, TypeScript, Electron, IoT, Embedded, Protocols, Web, Desktop 🏢 Description: Salary: 1250-1450 PLN/day on B2B Remote: remote / hybrid Rzeszów (2 days from the office per week) Why choose this offer? Development and maintenance of a frontend application based on React and JavaScript Support in stabilizing the existing solution and identifying architectural issues Working with system–device communication (client’s proprietary protocol) Development of a desktop application based on Electron Collaboration with backend and hardware/embedded teams Analysis and refactoring of code shared across web, desktop, and embedded environments Contribution to designing the solution architecture in a cross-platform environment Supporting the team in making technical and architectural decisions Project We are looking for an experienced Lead Frontend Developer to support the team in stabilizing and further developing an existing web application that integrates with hardware via a dedicated network protocol. The project is complex in nature—the application communicates with hardware devices, and part of the codebase has been designed in a universal way, enabling its use across web, desktop, and embedded environments. Therefore, a strong understanding of such systems and experience working at the intersection of software and hardware are essential. Expected competences and knowledge Very strong experience as Lead Frontend Developer Advanced knowledge of React and JavaScript (TypeScript is a plus) Experience working with Electron Experience working with applications integrating with devices / hardware (e.g., IoT, embedded systems, device communication) Understanding of challenges related to cross-platform systems (web / desktop / embedded) Ability to work with more “low-level” system communication logic (proprietary or similar protocols) Experience in analyzing and refactoring existing, complex systems Good understanding of backend (in terms of collaboration and architecture) Ability to work in a highly complex technical environment Technologies you'll work with React JavaScript TypeScript Electron Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Full-stack role focused on building and maintaining scalable web and mobile applications using React/React Native on the frontend and Java-based backend services within a microservices architecture. The position involves end-to-end feature development, REST API design, and ensuring performance, security, and scalability in a production environment. You will contribute to CI/CD, deployments, and continuous platform improvements in a modern tech stack. 🗂️ Requirements: 6+ years full-stack development experience, Strong experience with React or React Native, Strong command of Java, Experience building REST APIs, Experience with HTTP protocols, Understanding of frontend architecture and state management, Experience with SQL and NoSQL databases (PostgreSQL, MongoDB, Redis), Knowledge of CI/CD pipelines and deployment processes, Experience with microservices architecture 📃 Skills: Java, React, ReactNative, Node.js, REST, HTTP, SQL, PostgreSQL, MongoDB, Redis, Microservices, CI/CD, AWS, Azure, GCP, Docker, Kubernetes 🏢 Description: Salary: 1000-1300 pln/md on B2B Work mode: Elastic hybrid from Gdynia/Gdańsk (1-2 days per week from the office) Why choose this offer? End‑to‑end ownership w ith a modern tech stack Stability combined with continuous growth Autonomy and high‑quality collaboration Project The project focuses on building and maintaining scalable web and mobile applications used by a large and diverse user base. It involves developing modern, user‑friendly interfaces with React or React Native and integrating them with robust backend services built in Java . The system is based on RESTful APIs and microservices architecture, ensuring high performance, security, and scalability. You will work closely with product, design, and QA teams to continuously improve the platform and deliver high‑quality features to production. Responsibilities you'll have Design and develop responsive web and mobile applications using React or React Native Build and maintain backend services and APIs using Java (preferred) or Node.js Develop reusable components, modules, and libraries Design and implement RESTful APIs and microservices Integrate front-end applications with backend systems and third-party services Ensure application performance, scalability, and security Collaborate with cross-functional teams including designers, product managers, and QA Participate in code reviews and maintain code quality standards Support deployment, CI/CD pipelines, and production releases Expected competences and knowledge Over 6 years of experience in full-stack development Good experience with React or React Native Strong command of Java Experience building REST APIs and working with HTTP protocols Understanding of frontend architecture, state management, and component-based design Solid level of SQL / NoSQL (Postgres, Mongo, Redis) Knowledge of CI/CD pipelines and deployment processes Strong problem-solving and analytical skills Good command of AI-powered coding and trust in AI Strong communication and collaboration skills Ability to work independently and within a team Attention to detail and commitment to quality Ability to manage multiple tasks and priorities Adaptability and willingness to learn new technologies Nice to have Experience with microservices architecture Familiarity with cloud platforms (AWS, Azure, or GCP) Experience with containerization (Docker, Kubernetes) Knowledge of testing frameworks and automated testing Experience with mobile app deployment (App Store / Google Play) Technologies you'll work with Java React React Native REST APIs HTTP SQL (PostgreSQL) NoSQL (MongoDB, Redis) Node.js Microservices CI/CD pipelines AWS/Azure/GCP Docker Kubernetes App Store/Google Play AI Client – why choose this particular client from the Jit portfolio? Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Frontend Developer role focused on building modern web applications with interactive dashboards and data visualizations using React and TypeScript in a hybrid work model. The position involves collaboration with backend, product, and design teams while leveraging AI-assisted development tools to improve productivity and code quality. Candidates will contribute to scalable frontend architecture, charting solutions, and high-performance analytical interfaces. 🗂️ Requirements: 4+ years commercial frontend development experience, Strong React expertise, Strong TypeScript expertise, Experience with AI-powered development tools, Experience building data visualizations and interactive charts, Knowledge of charting libraries, Understanding of modern frontend architecture, Experience integrating REST APIs, Fluent English 📃 Skills: React, TypeScript, Highcharts, REST, GitHub, Copilot, ChatGPT, Cursor, Claude, Tailwind, Redux, Zustand, Jest, Cypress, Python 🏢 Description: Salary: 900 - 1000 PLN/MD on B2B Work model: hybrid from Gdańsk / Warszawa / Kraków / Rzeszów (2 days per week from the office) Availability: ASAP or within 14 days preferred Why choose this offer? Join a team building modern, data-driven web applications Work with a high-impact tech stack: React, TypeScript, AI tools Opportunity to create interactive dashboards and advanced data visualizations Collaborate with cross-functional teams (backend, product, design) Leverage AI-powered development tools to boost productivity and code quality Influence technical decisions and architecture discussions Project You will contribute to the development of modern web applications focused on interactive data visualization and dashboards . The project involves designing and implementing user-friendly, high-performance interfaces , including graphs, charts, and analytical views . You will work closely with backend developers and product stakeholders to deliver scalable and maintainable solutions. Responsibilities you’ll have: Develop and maintain modern web applications using React and TypeScript Build interactive dashboards and data visualization components Implement and enhance charting and graph solutions (e.g. Highcharts) Collaborate with cross-functional teams to deliver high-quality features Write clean, maintainable, and well-tested code Participate in code reviews and contribute to technical discussions Leverage AI-assisted development tools to improve productivity and code quality Expected competences and knowledge: Minimum 4 years of commercial experience in frontend development Strong hands-on expertise in React and TypeScript Experience with AI-powered development tools (e.g., GitHub Copilot, ChatGPT, Cursor, Claude) Proven track record of building data visualizations and interactive charts/graphs Familiarity with charting libraries (e.g., Highcharts or similar) Solid understanding of modern frontend architecture and best practices Experience integrating with REST APIs Strong problem-solving and communication skills Fluent English (written and spoken) Nice to have: Experience with Tailwind CSS Basic knowledge of Python Familiarity with state management libraries (Redux, Zustand, etc.) Experience with testing frameworks (Jest, React Testing Library, Cypress) Technologies you'll work with React TypeScript Highcharts (or similar charting libraries) REST APIs AI-assisted development tools (GitHub Copilot, ChatGPT, etc.) Tailwind CSS (nice to have) Redux / Zustand (nice to have) Jest / Cypress / React Testing Library (nice to have) Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Mid-level Frontend Developer role in a greenfield fintech project building a large-scale banking platform from scratch. You will design and develop web and mobile user interfaces using React, shaping frontend architecture and standards within a cross-functional international team. The position offers real impact on core frontend services and architectural decisions from day one. 🗂️ Requirements: Commercial experience in frontend development (mid-level), Hands-on experience with React, Experience building web applications, Understanding of modern frontend architecture, Ability to integrate frontend with REST APIs, Fluent English (spoken and written), Availability to work from office 3 days per week 📃 Skills: React, JavaScript, TypeScript, REST, GCP, Flutter, CI/CD, HTML, CSS 🏢 Description: Salary: 500-800 pln/md B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (3 days per week from the office) Why choose this offer? Opportunity to build a fintech platform from scratch (greenfield project) Real impact on architecture and core frontend services from day one Collaboration within a cross-functional, international team Work on a large-scale financial platform in the banking domain Project We are building a fintech platform from the ground up for a financial institution operating in the banking products space. As a Frontend Developer, you will be part of a cross-functional squad responsible for designing and developing the user-facing layer of this greenfield product . You will work within a mixed frontend-backend squad, collaborating closely with your Tech Lead, Senior Developer, Business Analyst, and QA Engineer. This is a rare opportunity to define the frontend architecture, UI patterns, and user experience of a financial platform from scratch - covering both web and mobile channels. Responsibilities you'll have Design, develop, and maintain frontend applications across web and mobile channels Build responsive, performant, and accessible user interfaces using React Collaborate within a cross-functional squad (Tech Lead, Senior Developer, BA, QA, Backend Developers) Translate business requirements and UI/UX designs into clean, maintainable frontend code Integrate frontend applications with backend APIs and services Participate in code reviews, technical discussions, and architectural decisions Write clean, testable, and well-documented code following best practices Contribute to establishing frontend standards, component libraries, and development patterns Communicate progress, blockers, and technical decisions in English Expected competences and knowledge Solid commercial experience in frontend development (mid-level) Hands-on experience with React (web applications) Fluent English (spoken and written) Availability to work from the office 3 days per week (Warsaw, Kraków, Tricity, or Rzeszów) Understanding of modern frontend architecture and best practices Nice to have: Familiarity with Google Cloud Platform (GCP) Familiarity with Flutter Experience in financial services or banking domain Experience in greenfield projects Knowledge of state management patterns, design systems, and component-driven architecture Technologies you'll work with React REST APIs GCP (optional) Modern frontend tooling and libraries CI/CD pipelines Client – why choose this particular client from the Jit portfolio? The client is a fintech institution operating in the Kingdom of Saudi Arabia, focused on modernising its digital capabilities and expanding its offering for micro-SME customers. It is an organisation with a strong market presence and a clear strategic commitment to innovation, aiming to deliver banking experiences that are fully digital, user-friendly, and deeply integrated with day-to-day business needs. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Senior Frontend Developer with strong .NET background to design and build a financial web application (Economic Profitability Calculator) in an Agile environment. The role focuses on Angular-based frontend development with backend support in .NET, ensuring high code quality and CI/CD automation. Hybrid work model with close collaboration with Product Owner and domain experts. 🗂️ Requirements: 8+ years of experience with Angular, 5+ years of experience in web development (HTML, JavaScript, TypeScript, CSS), 3+ years of experience in .NET and C# web development, 3+ years of experience with SQL, 2+ years of experience with Docker and Kubernetes, Experience with CI/CD process automation, Experience working in Agile environment, English proficiency minimum B2 level 📃 Skills: Angular, TypeScript, HTML, JavaScript, CSS, .NET, C#, SQL, Docker, Kubernetes, MSSQL, Dapper, Git, JIRA, Bamboo, Confluence, Bitbucket 🏢 Description: Salary: 900 - 1200 PLN/day on B2B Work model: elastic hybrid from Gdynia / Gdańsk (at least 2 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project We are looking for a passionate developer with a strong focus on frontend development and a background in .NET to join the Economic Profitability Calculator Team of our financial sector client. You will play a valuable role in designing and building an EPC web application, working closely with Subject Matter Experts and having a real influence on the product. Responsibilities you'll have Designing and implementing EPC business processes with a strong focus on the frontend part Ensuring code quality through high test automation coverage, code reviews, and pair programming Working in an Agile setup Cooperating closely with the Product Owner and Subject Matter Experts Maintaining and extending CI/CD process automation Expected competences and knowledge 8+ years of experience with Angular 5+ years of experience in web development ( HTML, JavaScript, TypeScript, CSS ) 3+ years of experience in .NET and C# web development 3+ years of experience with SQL 2+ years of experience with Docker and Kubernetes Technology enthusiast focused on high product quality and good UX Passion for frontend development with experience in backend development Team-player mindset Willingness to continuously improve competences Good communication skills, including communication in English (min. B2 level) Nice to have Experience with UI test automation Experience with CI/CD tools (Bamboo) Experience using an AI coding assistant Technologies you'll work with Angular TypeScript HTML JavaScript CSS .NET C# Docker Kubernetes MS SQL Server Dapper Git Atlassian Stack (JIRA, Bamboo, Confluence, Bitbucket) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Oferta dotyczy rozwoju nowoczesnych aplikacji frontendowych w oparciu o React, TypeScript i architekturę Micro Frontends w środowisku chmurowym GCP. Projekt obejmuje tworzenie responsywnych interfejsów, integrację Design Systemów oraz wykorzystanie AI i modeli LLM w rozwiązaniach biznesowych. Praca realizowana jest zdalnie z Polski z okazjonalnymi wizytami w biurze. 🗂️ Requirements: 3+ lata komercyjnego doświadczenia, Bardzo dobra znajomość TypeScript, Bardzo dobra znajomość JavaScript ES6+, Doświadczenie z Node.js, Doświadczenie z React v16.8+, Znajomość Hooks i Context API, Dobra znajomość Vanilla JavaScript, Bardzo dobra znajomość HTML5, Bardzo dobra znajomość CSS3, Doświadczenie w Responsive Web Design, Znajomość Atomic CSS, Znajomość Utility-first CSS, Doświadczenie z Jest, Znajomość Component-Driven Development, Doświadczenie z Design Systemami, Doświadczenie z Micro Frontends, Znajomość Google Cloud Platform, Doświadczenie z rozwiązaniami chmurowymi, Znajomość LLM i integracji API modeli AI, Znajomość prompt engineering, Znajomość Git, Znajomość Cypress lub Playwright, Znajomość frameworków modularnych, Język angielski B2+ 📃 Skills: TypeScript, JavaScript, Node.js, React, GCP, HTML5, CSS3, Jest, Cypress, Playwright, Git, OpenAI, Gemini, LLM, Microfrontends, AI 🏢 Description: Wynagrodzenie: 600-900 PLN netto/ dziennie na umowie B2B Miejsce i model pracy: Praca zdalna z terenu Polski z okazjonalnymi wizytami w biurze w Poznaniu/Warszawie (średnio raz w miesiącu) Dlaczego warto wybrać tę ofertę? Będziesz rozwijać nowoczesne aplikacje webowe z wykorzystaniem React, TypeScript oraz architektury Micro Frontends Zyskasz możliwość pracy z nowoczesnym stackiem technologicznym obejmującym React, Node.js, Google Cloud Platform oraz narzędzia wspierające rozwój aplikacji frontendowych Weźmiesz udział w projektach wykorzystujących sztuczną inteligencję , w tym modele LLM, integracje z API modeli AI oraz rozwiązania Generative AI w rzeczywistych zastosowaniach biznesowych Będziesz mieć wpływ na rozwój architektury aplikacji , tworzenie komponentów zgodnych z Design Systemami oraz wdrażanie nowoczesnych praktyk w zakresie jakości i testowania oprogramowania Projekt Projekt obejmuje tworzenie i rozwój skalowalnych rozwiązań frontendowych z wykorzystaniem React, TypeScript oraz nowoczesnych praktyk inżynierii oprogramowania. Praca obejmuje rozwój komponentów zgodnych z Design Systemem, wdrażanie architektury Micro Frontends, wykorzystanie usług Google Cloud Platform oraz integrację rozwiązań opartych o modele AI. Zakres obowiązków Tworzenie i rozwój rozwiązań frontendowych z wykorzystaniem React, TypeScript i JavaScript Integracja oraz wykorzystanie Design Systemów zgodnie z zasadami Component-Driven Development Tworzenie responsywnych interfejsów użytkownika (RWD) Wykorzystywanie rozwiązań chmurowych GCP oraz narzędzi AI, w tym integracji z API modeli AI Oczekiwane kompetencje i doświadczenie Bardzo dobra znajomość TypeScript, JavaScript (ES6+) oraz Node.js Doświadczenie z React (v16.8+ – Hooks, Context API) Dobra znajomość Vanilla JavaScript Bardzo dobra znajomość HTML5 i CSS3 Doświadczenie w tworzeniu Responsive Web Design (RWD) Znajomość podejścia Atomic CSS / Utility-first CSS Doświadczenie w testach jednostkowych z wykorzystaniem Jest Znajomość zasad Component-Driven Development Doświadczenie z integracją i wykorzystaniem Design Systemów Doświadczenie z architekturą modułową oraz Micro Frontends Znajomość usług Google Cloud Platform (GCP) oraz doświadczenie w pracy z rozwiązaniami chmurowymi Praktyczna znajomość narzędzi i technologii AI , w tym wykorzystania LLM, integracji z API modeli AI (np. OpenAI, Gemini), prompt engineering oraz wspomagania procesów deweloperskich z wykorzystaniem AI Znajomość języka angielskie go na poziomie B2+ Doświadczenie w pracy z systemem kontroli wersji Git Znajomość narzędzi do testów end-to-end , takich jak Cypress lub Playwright Znajomość frameworków wspierających architekturę modułową (np. Opbox) 3+ lata komercyjnego doświadczenia Technologie z jakimi będziesz pracować TypeScript JavaScript (ES6+) Node.js React Google Cloud Platform (GCP) HTML5 CSS3 Jest Cypress / Playwright Git OpenAI API / Gemini API Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz Klient to lider polskiego rynku e-commerce , który od lat wyznacza kierunki rozwoju branży. Z platformy korzysta ponad 20 milionów użytkowników , a organizacja nieustannie inwestuje w rozwój produktów, technologii i nowych obszarów biznesowych. To jedna z największych firm technologicznych w Polsce , zatrudniająca ponad 1000 specjalistów IT pracujących nad nowoczesnymi, autorskimi rozwiązaniami. Dołączając do projektu, będziesz współtworzyć systemy wykorzystywane każdego dnia przez miliony użytkowników. To doskonała okazja do pracy z nowoczesnymi technologiami, w środowisku stawiającym na skalowalność, wydajność i rozwój innowacyjnych rozwiązań. O Jit Team The Human factor of IT - to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 770 doświadczonych ekspertów , którym oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Wspólnie z klientami z całego świata tworzymy innowacyjne rozwiązania IT, dostarczane przez wysoko specjalizowane i efektywne zespoły. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy szkoły, uczelnie i instytucje edukacyjne – prowadząc zajęcia, projekty edukacyjne, sponsorując wydarzenia czy przekazując sprzęt do nauki. Oferujemy staże umożliwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Wspieramy też liczne organizacje charytatywne wspierające ubogich, dzieci i osoby starsze. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez ponad 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Hybrid B2B role in a fintech environment focused on developing Java-based backend services and end-to-end features for financial reporting and cash flow calculations. The position involves working with microservices, APIs, frontend integrations, and AI coding tools in a fast-paced, ownership-driven team. Candidates will contribute across backend and frontend layers while supporting CI/CD processes and production releases. 🗂️ Requirements: 5+ years of backend or full-stack development experience, Strong Java proficiency, Experience with REST APIs and microservices, Experience with HTTP integrations, Basic experience with Angular, React, or similar frontend frameworks, Knowledge of PostgreSQL, MongoDB, and Redis, Understanding of CI/CD pipelines and deployment processes, Active usage of AI coding tools, Experience in fintech or financial domain 📃 Skills: Java, REST, Microservices, HTTP, Angular, React, PostgreSQL, MongoDB, Redis, CI/CD, Docker, Kubernetes, AWS, Azure, GCP, Copilot, Cursor 🏢 Description: Salary: 1000 - 1300 PLN/MD on B2B Work model: hybrid from Gdańsk (2 days per week from the office) Availability: ASAP / up to 30 days' notice period Why choose this offer? Work in a fintech environment on complex financial instruments and calculations End-to-end ownership – from backend logic to delivering complete features Broad tech exposure: backend, microservices , and frontend layers (Angular/React) Work culture focused on ownership, autonomy, and fast delivery Project You will work on a fintech solution focused on complex financial instruments and calculations . The team builds and maintains Java-based backend services and APIs supporting financial reporting, cash flow calculations, and monthly statements . The role involves end-to-end feature delivery , including occasional work on frontend layers (Angular or similar) , as well as integrations with third-party services . The project emphasizes accuracy, reliability , and the use of AI coding tools in daily development. Responsibilites you'll have: Design, develop, and maintain robust backend services and APIs in Java Deliver end-to-end features (e.g. financial reports, cash statements, calculations) Work across the stack - including frontend layers (Angular or similar) when needed Integrate systems with frontend applications and third-party services Participate in code reviews and ensure high code quality standards Support CI/CD pipelines and production releases Actively use AI coding tools (agentic coding, Copilot, Cursor) in daily workflow Expected competences and knowledge: At least 5 years of experience in backend or full-stack development Strong proficiency in Java Experience with REST APIs, microservices, and HTTP integrations Basic hands-on experience with frontend frameworks (Angular, React, or similar) Solid knowledge of databases (PostgreSQL, MongoDB, Redis) Understanding of CI/CD pipelines and deployment processes Active usage of AI coding tools (required) Experience in fintech / financial domain (highly preferred) Nice to have: Experience with microservices architecture Familiarity with cloud platforms (AWS, Azure, GCP) Experience with containerization (Docker, Kubernetes) Experience with automated testing Technologies you'll work with Java REST APIs & Microservices architecture Angular / React (basic functional usage) PostgreSQL / MongoDB / Redis CI/CD pipelines Docker / Kubernetes (nice-to-have) Cloud platforms: AWS / Azure / GCP (nice-to-have) Client – why choose this particular client from the Jit portfolio? Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Oferta dotyczy rozwoju nowoczesnych aplikacji webowych w architekturze Micro Frontends z wykorzystaniem React, TypeScript i Node.js. Projekt obejmuje pracę z rozwiązaniami AI, integracją modeli LLM oraz usługami Google Cloud Platform. Praca odbywa się zdalnie z Polski z okazjonalnymi wizytami w biurze w Poznaniu lub Warszawie. 🗂️ Requirements: 6+ lat komercyjnego doświadczenia, Bardzo dobra znajomość TypeScript, Bardzo dobra znajomość JavaScript ES6+, Doświadczenie z Node.js, Doświadczenie z React v16.8+, Znajomość Hooks i Context API, Dobra znajomość Vanilla JavaScript, Bardzo dobra znajomość HTML5, Bardzo dobra znajomość CSS3, Doświadczenie w Responsive Web Design, Znajomość Atomic CSS lub Utility-first CSS, Doświadczenie w testach jednostkowych z Jest, Znajomość Cypress lub Playwright, Znajomość Component-Driven Development, Doświadczenie z Design Systems, Doświadczenie z Micro Frontends, Znajomość frameworków architektury modułowej, Znajomość Google Cloud Platform, Praktyczna znajomość LLM i integracji API modeli AI, Doświadczenie z Git, Język angielski B2+ 📃 Skills: TypeScript, JavaScript, Node.js, React, Hooks, ContextAPI, HTML5, CSS3, RWD, AtomicCSS, Jest, Cypress, Playwright, MicroFrontends, Opbox, GCP, OpenAI, Gemini, LLM, Git 🏢 Description: Wynagrodzenie: 1000-1200 PLN netto/ dziennie na umowie B2B Miejsce i model pracy: Praca zdalna z terenu Polski z okazjonalnymi wizytami w biurze w Poznaniu/Warszawie (średnio raz w miesiącu) Dlaczego warto wybrać tę ofertę? Będziesz rozwijać nowoczesne aplikacje webowe z wykorzystaniem React, TypeScript oraz architektury Micro Frontends Zyskasz możliwość pracy z nowoczesnym stackiem technologicznym obejmującym React, Node.js, Google Cloud Platform oraz narzędzia wspierające rozwój aplikacji frontendowych Weźmiesz udział w projektach wykorzystujących sztuczną inteligencję , w tym modele LLM, integracje z API modeli AI oraz rozwiązania Generative AI w rzeczywistych zastosowaniach biznesowych Będziesz mieć wpływ na rozwój architektury aplikacji , tworzenie komponentów zgodnych z Design Systemami oraz wdrażanie nowoczesnych praktyk w zakresie jakości i testowania oprogramowania Projekt Projekt obejmuje pracę nad rozwojem aplikacji webowych z wykorzystaniem React, TypeScript oraz architektury modułowej. Projekt obejmuje tworzenie i rozwój komponentów, integrację Design Systemów, implementację testów oraz wykorzystanie rozwiązań chmurowych i technologii AI. Zakres obowiązków Rozwój aplikacji webowych z wykorzystaniem React, TypeScript, JavaScript oraz Node.js Tworzenie responsywnych interfejsów użytkownika zgodnie z zasadami Responsive Web Design (RWD).Implementacja komponentów w oparciu o Component-Driven Development oraz integracja Design Systemów Praca nad architekturą modułową i rozwiązaniami Micro Frontends Tworzenie oraz utrzymanie testów jednostkowych i end-to-end Wykorzystywanie narzędzi i technologii AI , w tym integracja z API modeli AI oraz prompt engineering Praca z usługami Google Cloud Platform (GCP) Współpraca w zespole z wykorzystaniem systemu kontroli wersji Git oraz komunikacja w języku angielskim Oczekiwane kompetencje i doświadczenie Bardzo dobra znajomość TypeScript, JavaScript (ES6+) oraz Node.js Doświadczenie z React (v16.8+), w tym Hooks i Context API Dobra znajomość Vanilla JavaScript Bardzo dobra znajomość HTML5 i CSS3 Doświadczenie w tworzeniu Responsive Web Design (RWD) Znajomość podejścia Atomic CSS / Utility-first CSS Doświadczenie w testach jednostkowych z wykorzystaniem Jest Znajomość narzędzi do testów end-to-end , takich jak Cypress lub Playwright Znajomość zasad Component-Driven Development Doświadczenie z integracją i wykorzystaniem Design Systemów Doświadczenie z architekturą modułową oraz Micro Frontends Znajomość frameworków wspierających architekturę modułową (np. Opbox) Znajomość usług Google Cloud Platform (GCP) oraz doświadczenie w pracy z rozwiązaniami chmurowymi Praktyczna znajomość narzędzi i technologii AI , w tym wykorzystania LLM , integracji z API modeli AI (np. OpenAI, Gemini), prompt engineering oraz wspomagania procesów deweloperskich z wykorzystaniem AI Znajomość języka angielskiego na poziomie B2+ Doświadczenie w pracy z systemem kontroli wersji Git 6+ lat komercyjnego doświadczenia Technologie z jakimi będziesz pracować TypeScript JavaScript (ES6+) Node.js React Google Cloud Platform (GCP) HTML5 CSS3 Atomic CSS / Utility-first CSS Jest Cypress Playwright Design Systems Micro Frontends Opbox OpenAI API, Gemini API, Git LLM (Large Language Models) Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz Klient to lider polskiego rynku e-commerce , który od lat wyznacza kierunki rozwoju branży. Z platformy korzysta ponad 20 milionów użytkowników , a organizacja nieustannie inwestuje w rozwój produktów, technologii i nowych obszarów biznesowych. To jedna z największych firm technologicznych w Polsce , zatrudniająca ponad 1000 specjalistów IT pracujących nad nowoczesnymi, autorskimi rozwiązaniami. Dołączając do projektu, będziesz współtworzyć systemy wykorzystywane każdego dnia przez miliony użytkowników. To doskonała okazja do pracy z nowoczesnymi technologiami, w środowisku stawiającym na skalowalność, wydajność i rozwój innowacyjnych rozwiązań. O Jit Team The Human factor of IT - to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 770 doświadczonych ekspertów , którym oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Wspólnie z klientami z całego świata tworzymy innowacyjne rozwiązania IT, dostarczane przez wysoko specjalizowane i efektywne zespoły. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy szkoły, uczelnie i instytucje edukacyjne – prowadząc zajęcia, projekty edukacyjne, sponsorując wydarzenia czy przekazując sprzęt do nauki. Oferujemy staże umożliwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Wspieramy też liczne organizacje charytatywne wspierające ubogich, dzieci i osoby starsze. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez ponad 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Oferta dotyczy rozwoju nowoczesnych aplikacji webowych w oparciu o React, TypeScript i architekturę Micro Frontends w środowisku chmurowym GCP. Projekt obejmuje tworzenie responsywnych interfejsów, integrację Design Systemów, implementację testów oraz wykorzystanie technologii AI i modeli LLM. Praca zdalna z Polski z okazjonalnymi wizytami w biurze w Poznaniu lub Warszawie. 🗂️ Requirements: 6+ lat komercyjnego doświadczenia, Bardzo dobra znajomość TypeScript, Bardzo dobra znajomość JavaScript ES6+, Doświadczenie z React v16.8+, Znajomość Hooks i Context API, Dobra znajomość Vanilla JavaScript, Bardzo dobra znajomość HTML5, Bardzo dobra znajomość CSS3, Doświadczenie w Responsive Web Design, Znajomość Atomic CSS lub Utility-first CSS, Doświadczenie z Jest, Znajomość Cypress lub Playwright, Znajomość Component-Driven Development, Doświadczenie z Design Systems, Doświadczenie z Micro Frontends, Znajomość architektury modułowej, Znajomość Opbox, Doświadczenie z Google Cloud Platform, Praktyczna znajomość LLM i API modeli AI, Doświadczenie z OpenAI API lub Gemini API, Znajomość prompt engineering, Doświadczenie z Git, Znajomość języka angielskiego B2+ 📃 Skills: TypeScript, JavaScript, Node.js, React, GCP, HTML5, CSS3, AtomicCSS, Jest, Cypress, Playwright, MicroFrontends, Opbox, OpenAI, Gemini, Git, LLM 🏢 Description: Wynagrodzenie: 1000-1200 PLN netto/ dziennie na umowie B2B Miejsce i model pracy: Praca zdalna z terenu Polski z okazjonalnymi wizytami w biurze w Poznaniu/Warszawie (średnio raz w miesiącu) Dlaczego warto wybrać tę ofertę? Będziesz rozwijać nowoczesne aplikacje webowe z wykorzystaniem React, TypeScript oraz architektury Micro Frontends Zyskasz możliwość pracy z nowoczesnym stackiem technologicznym obejmującym React, Node.js, Google Cloud Platform oraz narzędzia wspierające rozwój aplikacji frontendowych Weźmiesz udział w projektach wykorzystujących sztuczną inteligencję , w tym modele LLM, integracje z API modeli AI oraz rozwiązania Generative AI w rzeczywistych zastosowaniach biznesowych Będziesz mieć wpływ na rozwój architektury aplikacji , tworzenie komponentów zgodnych z Design Systemami oraz wdrażanie nowoczesnych praktyk w zakresie jakości i testowania oprogramowania Projekt Projekt obejmuje pracę nad rozwojem aplikacji webowych z wykorzystaniem React, TypeScript oraz architektury modułowej. Projekt obejmuje tworzenie i rozwój komponentów, integrację Design Systemów, implementację testów oraz wykorzystanie rozwiązań chmurowych i technologii AI. Zakres obowiązków Rozwój aplikacji webowych z wykorzystaniem React, TypeScript, JavaScript oraz Node.js Tworzenie responsywnych interfejsów użytkownika zgodnie z zasadami Responsive Web Design (RWD).Implementacja komponentów w oparciu o Component-Driven Development oraz integracja Design Systemów Praca nad architekturą modułową i rozwiązaniami Micro Frontends Tworzenie oraz utrzymanie testów jednostkowych i end-to-end Wykorzystywanie narzędzi i technologii AI , w tym integracja z API modeli AI oraz prompt engineering Praca z usługami Google Cloud Platform (GCP) Współpraca w zespole z wykorzystaniem systemu kontroli wersji Git oraz komunikacja w języku angielskim Oczekiwane kompetencje i doświadczenie Bardzo dobra znajomość TypeScript, JavaScript (ES6+) oraz Node.js Doświadczenie z React (v16.8+), w tym Hooks i Context API Dobra znajomość Vanilla JavaScript Bardzo dobra znajomość HTML5 i CSS3 Doświadczenie w tworzeniu Responsive Web Design (RWD) Znajomość podejścia Atomic CSS / Utility-first CSS Doświadczenie w testach jednostkowych z wykorzystaniem Jest Znajomość narzędzi do testów end-to-end , takich jak Cypress lub Playwright Znajomość zasad Component-Driven Development Doświadczenie z integracją i wykorzystaniem Design Systemów Doświadczenie z architekturą modułową oraz Micro Frontends Znajomość frameworków wspierających architekturę modułową (np. Opbox) Znajomość usług Google Cloud Platform (GCP) oraz doświadczenie w pracy z rozwiązaniami chmurowymi Praktyczna znajomość narzędzi i technologii AI , w tym wykorzystania LLM , integracji z API modeli AI (np. OpenAI, Gemini), prompt engineering oraz wspomagania procesów deweloperskich z wykorzystaniem AI Znajomość języka angielskiego na poziomie B2+ Doświadczenie w pracy z systemem kontroli wersji Git 6+ lat komercyjnego doświadczenia Technologie z jakimi będziesz pracować TypeScript JavaScript (ES6+) Node.js React Google Cloud Platform (GCP) HTML5 CSS3 Atomic CSS / Utility-first CSS Jest Cypress Playwright Design Systems Micro Frontends Opbox OpenAI API, Gemini API, Git LLM (Large Language Models) Klient – dlaczego warto wybrać akurat tego klienta z portfolio JIT? Nasz Klient to lider polskiego rynku e-commerce , który od lat wyznacza kierunki rozwoju branży. Z platformy korzysta ponad 20 milionów użytkowników , a organizacja nieustannie inwestuje w rozwój produktów, technologii i nowych obszarów biznesowych. To jedna z największych firm technologicznych w Polsce , zatrudniająca ponad 1000 specjalistów IT pracujących nad nowoczesnymi, autorskimi rozwiązaniami. Dołączając do projektu, będziesz współtworzyć systemy wykorzystywane każdego dnia przez miliony użytkowników. To doskonała okazja do pracy z nowoczesnymi technologiami, w środowisku stawiającym na skalowalność, wydajność i rozwój innowacyjnych rozwiązań. O Jit Team The Human factor of IT - to nie tylko slogan, to filozofia. Fundamentem Jit Team są ludzie, dlatego to właśnie Was traktujemy priorytetowo. Zatrudniamy ponad 770 doświadczonych ekspertów , którym oferujemy rozwojowe projekty, szeroki zakres benefitów oraz autorski program rozwoju zawodowego. Wspólnie z klientami z całego świata tworzymy innowacyjne rozwiązania IT, dostarczane przez wysoko specjalizowane i efektywne zespoły. Za naszą maksymą stoją, także działania charytatywne i edukacyjne. Wspieramy szkoły, uczelnie i instytucje edukacyjne – prowadząc zajęcia, projekty edukacyjne, sponsorując wydarzenia czy przekazując sprzęt do nauki. Oferujemy staże umożliwiające rozpoczęcie kariery w IT. Wspieramy ratowników wodnych oraz szpitale, dostarczając potrzebne wyposażenie. Wspieramy też liczne organizacje charytatywne wspierające ubogich, dzieci i osoby starsze. Jesteśmy Polską firmą i dzielimy się tym, co osiągnęliśmy przez ponad 15 lat działalności. Wspierając rodzime inicjatywy, dbamy o obieg dobrej energii.

🏢 Summary: Frontend Architect role in a financial project focused on building secure, high-performance, interactive web applications supporting complex workflows and real-time data. The position involves shaping frontend architecture, developing Web Components, and ensuring code quality and performance across large-scale systems. Hybrid work model with strong emphasis on technical excellence and collaboration in international teams. 🗂️ Requirements: Strong expertise in HTML, CSS, JavaScript, TypeScript, Experience with Web Components and Lit, Solid understanding of Node.js and npm ecosystem, Experience writing unit tests with Vitest, Strong knowledge of frontend architecture and design patterns, Experience with performance optimization and Core Web Vitals, Ability to integrate REST and GraphQL APIs, Experience in large-scale, modular frontend codebases 📃 Skills: TypeScript, JavaScript, HTML5, CSS3, Sass, WebComponents, Lit, Node.js, npm, Vitest, Playwright, REST, GraphQL, CI/CD, GitHubActions, GitLabCI, Kafka, MQ, NinjaFork 🏢 Description: Salary: 900-1200 PLN/day on B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Łódź (2/3 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on building secure, high‑performance, and highly interactive web applications that support complex business workflows, real‑time data processing, and seamless user experiences. You’ll play a key role in shaping the frontend architecture, ensuring code quality, and driving technical excellence across the team. Responsibilities you'll have Architect and implement complex, interactive user interfaces and single‑page applications using TypeScript and JavaScript Define and maintain best practices for frontend architecture, state management, and component reusability Develop and maintain Web Components using Lit, ensuring modularity and long‑term maintainability Optimize application performance, improve Core Web Vitals, and ensure smooth experiences across devices and browsers Collaborate closely with backend engineers, UX/UI designers, and product managers to deliver end‑to‑end product features Integrate with REST and GraphQL APIs, ensuring reliability, security, and consistency of data flows. Conduct performance audits, code reviews, and mentor other developers Contribute to CI/CD pipelines and deployment workflows (nice‑to‑have) Participate in system design discussions and influence technical decisions across the product Expected competences and knowledge Strong expertise in HTML, CSS, JavaScript, TypeScript Experience with Web Components and Lit Solid understanding of Node.js and npm ecosystem Experience writing unit tests with Vitest Strong knowledge of frontend architecture, design patterns, and performance optimization Ability to work with REST/GraphQL APIs Experience in large‑scale, modular frontend codebases Strong communication skills and ability to collaborate in cross‑functional teams Technologies you'll work with TypeScript, JavaScript Web Components, Lit HTML5, CSS3, Sass Node.js, npm Vitest, Playwright (optional) REST, GraphQL CI/CD tools (GitHub Actions, GitLab CI, or similar) Kafka, MQ systems (nice‑to‑have) NinjaFork (nice‑to‑have) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.