Senior React Developer

🏢 Summary: Senior React Developer role in the banking sector focused on building and maintaining platform-level front-end solutions such as NPM libraries and design system components. The position involves developing scalable architectures, ensuring high code quality, writing unit and e2e tests, and supporting other development teams. Hybrid work model with strong emphasis on reusable, accessible, and well-documented front-end solutions. 🗂️ Requirements: Very good knowledge of React, Very good knowledge of JavaScript, Very good knowledge of TypeScript, Strong knowledge of NPM, Strong knowledge of CSS, Experience building scalable front-end applications, Experience creating and maintaining NPM packages, Experience with unit and e2e testing, Ability to write and refactor tests using Jest, Testing Library, Cypress, Proficient use of Git, Advanced branch and commit management, Knowledge of Accessibility (a11y) principles, Ability to build interfaces compliant with WCAG, English level B2 or higher, Experience designing components, libraries or design systems, Experience designing scalable component architecture 📃 Skills: React, JavaScript, TypeScript, NPM, CSS, Jest, TestingLibrary, Cypress, Git, WCAG, Accessibility 🏢 Description: Dla klienta z branży bankowości poszukujemy Senior React Developer'a Stawka: 110-130 zł/h netto+VAT B2B Praca hybrydowa : 1 dzień w tygodniu (środa) z biura w Warszawie ZADANIA Dostarczanie generycznych i platformowych rozwiązan dla zespołów front-endowych jak np. Biblioteki NPM, komponenty w ramach Bankowego Design Systemu, generyczne funkcjonalnosci, innowacyjne rozwiązania techniczne Pisanie i utrzymanie testów jednostkowych oraz e2e Dbanie o spójność i wysoką jakość dostarczanych rozwiązan Naprawa błędów Współpraca z innymi zespołami platformowymi i projektantami Współpraca z zespołami produktowymi korzystających z rozwiązan platformowych Wsparcie merytoryczne zespołów w ramach szeroko rozumianego front-endu Tworzenie i utrzymywanie dokumentacji WYMAGANIA Bardzo dobra znajomość React, JavaScript, TypeScript, NPM oraz CSS Doświadczenie w tworzeniu i utrzymywaniu skalowalnych aplikacji front-endowych, oraz paczek NPM Bardzo dobra znajomość testów jednostkowych oraz e2e Umiejętność samodzielnego pisania, utrzymywania i refaktoryzacji testów (np. Jest, Testing Library, Cypress). Biegła obsługa systemu kontroli wersji Git Swobodne zarządzanie branchami i commitami (rebase, cherry-pick, revert, squash, zmiana kolejności i opisów commitów). Dobre rozumienie zasad dostępności (Accessibility / a11y) Umiejętność tworzenia interfejsów zgodnych z WCAG oraz świadomość wpływu dostępności na jakość produktu. Znajomość języka angielskiego w piśmie i mowie (min. B2) PROFIL KANDYDATA Szukamy osoby, która: ma doświadczenie w projektowaniu komponentów technicznych, bibliotek lub elementów design systemu (nie tylko ich używaniu) specjalizuje się w tworzeniu rozwiązań o charakterze technicznym/platformowym — rozwój komponentów i architektury, a nie wyłącznie prostych widoków czy formularzy posiada doświadczenie w projektowaniu architektury komponentów (np. w ramach design systemów) i rozumie, jak budować rozwiązania skalowalne oraz wielokrotnego użytku potrafi tworzyć rozwiązania, które wspierają inne zespoły developerskie w efektywnym wytwarzaniu aplikacji MILE WIDZIANE CO OFERUJEMY NA TYM PROJEKCIE? Współpracę w oparciu o umowę B2B i stawkę: 110-130 zł/h netto+VAT Pracę hybrydową z Warszawy (1 raz w tygodniu z biura) Wsparcie dedykowanego opiekuna. Po dołączeniu do speedapp, otrzymasz kontakt do dedykowanego opiekuna, który zadba, aby współpraca z nami oraz z klientem sprawiała Ci satysfakcję. Wydarzenia oraz spotkania integracyjne, a także udział w różnych inicjatywach np. sportowych. JAK WYGLĄDA REKRUTACJA? Zgłoszenie : Zaaplikuj i prześlij swoje CV. Po weryfikacji aplikacji rekruter skontaktuje się telefonicznie z wybranymi kandydatami. Screening : Porozmawiaj z rekruterem speedapp o Twoim doświadczeniu . Kolejne etapy: Rekruter speedapp przedstawi Ci jak wygląda proces rekrutacji na dane stanowisko. Rekruter speedapp pozostanie z Tobą w kontakcie podczas całego procesu. O SPEEDAPP W speedapp wierzymy, że organizacja jest tak dobra jak tworzący ją ludzie. Jesteśmy zespołem ekspertów IT i innych specjalistów pracujących dla naszych klientów na całym świecie (m.in Izrael, Austria, USA). Wykraczamy daleko poza kategorię HR. Budujemy zespoły IT, a także pomagamy w ich zarządzaniu. 👉 10 lat doświadczenia 👉 +100 klientów na całym świecie +300 zatrudnień rocznie 💎 Jesteśmy laureatem prestiżowej nagrody Diamenty Forbes cztery lata z rzędu (2022, 2023, 2024, 2025), członkiem sieci Fast Growth Icons oraz FinTech Poland. MASZ PYTANIA? Skontaktuj się bezpośrednio z rekruterem odpowiedzialnym za ten proces. Iga Olszewska-Magnowska Senior IT Delivery Consultant iga.olszewska@speedapp.pl

🏢 Summary: Senior React Developer role in the banking sector focused on delivering scalable, high-quality front-end and platform solutions. The position involves building and maintaining reusable components, ensuring accessibility compliance, and implementing comprehensive unit and e2e testing. The developer will also support other teams with front-end best practices and technical expertise. 🗂️ Requirements: Minimum 5 years of professional experience, Experience in banking or financial sector, Very good knowledge of React, Very good knowledge of JavaScript, Very good knowledge of TypeScript, Very good knowledge of CSS, Experience in building scalable front-end applications, Experience in creating and maintaining NPM packages, Strong knowledge of unit testing, Strong knowledge of e2e testing, Ability to write and refactor tests using Jest, Testing Library, Cypress, Proficiency with Git, Knowledge of Accessibility (a11y) principles, Ability to build interfaces compliant with WCAG, Experience with Jira, Experience with Confluence, Experience with Bitbucket 📃 Skills: React, JavaScript, TypeScript, CSS, NPM, Jest, TestingLibrary, Cypress, Git, WCAG, Accessibility, Jira, Confluence, Bitbucket 🏢 Description: umowa: B2B stawka: 185 zł/h + VAT tryb: hybryda, 1 dzień w tygodniu (środa) z biura w Warszawie branża: bankowość Poszukujemy Senior React Developera, który posiada bardzo dobrą znajomość technologii webowych oraz umiejętność współpracy w zespole. Wymagana jest biegłość w React, JavaScript, TypeScript oraz CSS, a także znajomość testów jednostkowych i dobrych praktyk w zakresie dostępności. Idealny kandydat to osoba, która potrafi dostarczać wysokiej jakości rozwiązania techniczne oraz wspierać inne zespoły. Główne obowiązki Dostarczanie generycznych i platformowych rozwiązań dla zespołów front-endowych. Pisanie i utrzymanie testów jednostkowych oraz e2e. Dbanie o spójność i wysoką jakość dostarczanych rozwiązań. Naprawa błędów. Współpraca z innymi zespołami platformowymi i projektantami. Wsparcie merytoryczne zespołów w ramach szeroko rozumianego front-endu. Tworzenie i utrzymywanie dokumentacji. Kluczowe wymagania Minimum 5 lat doświadczenia zawodowego. Doświadczenie w sektorze bankowym/finansowym. Bardzo dobra znajomość React, JavaScript, TypeScript, NPM oraz CSS. Doświadczenie w tworzeniu i utrzymywaniu skalowalnych aplikacji front-endowych oraz paczek NPM. Bardzo dobra znajomość testów jednostkowych oraz e2e. Umiejętność samodzielnego pisania, utrzymywania i refaktoryzacji testów (np. Jest, Testing Library, Cypress). Biegła obsługa systemu kontroli wersji Git. Dobre rozumienie zasad dostępności (Accessibility / a11y). Umiejętność tworzenia interfejsów zgodnych z WCAG. Doświadczenie z pracą z Jira, Confluence, Bitbucket. Umiejętności mile widziane Doświadczenie w pracy z design systemami, zarówno w ich używaniu, jak i współtworzeniu we współpracy z zespołem projektowym. Doświadczenie w architekturze microfrontendów. Znajomość wyzwań związanych z podziałem aplikacji i integracją. Doświadczenie w pracy z hybrydowymi aplikacjami mobilnymi (np. WebView, React Native). Doświadczenie w pracy z agentami AI lub narzędziami opartymi o AI.

🏢 Summary: Senior React Developer role focused on building a modular, component-based UI platform for a core financial engine within a fully remote model. The position involves developing new features, integrations, and contributing to architectural decisions in an agile, fast-paced environment. The role requires strong ownership and collaboration within a small frontend team. 🗂️ Requirements: 5+ years of professional frontend development experience, Strong experience with React, Strong understanding of REST APIs, Strong knowledge of CSS, Experience with component-based UI design, Ability to manage complex tasks independently, Communicative Polish and English, Legal right to work in the European Union 📃 Skills: React, JavaScript, REST, CSS, Kubernetes, Grafana, Prometheus, Jira, Confluence 🏢 Description: Unleash the Power of Innovation - Build Next-Generation Financial Platforms! 100% remote work model As a Senior React Developer , you will be working for our client, a leading player in the financial industry, dedicated to creating cutting-edge, flexible, and scalable digital solutions. Join a team responsible for developing a core financial engine platform, delivering impactful UI components, and shaping the future of financial technology within an agile environment. Your main responsibilities: Develop and enhance a modular, component-based UI platform from scratch using React Collaborate closely with a small, autonomous frontend team to ensure seamless integration with the core financial engine Take ownership of tasks in a fast-paced environment, managing your workload proactively without direct oversight Implement new features and integrations, possibly connecting with other frontend systems, ensuring high performance and usability Contribute to the platform’s architecture and design decisions, ensuring adaptability and scalability You're ideal for this role if you have: 5+ years of professional experience in frontend development, particularly with React Strong understanding of REST APIs, CSS, and component-based UI design Experience working in autonomous teams, managing complex development tasks from start to finish Familiarity with Kubernetes, Grafana, Prometheus, Jira, and Confluence is a plus A proactive attitude with excellent problem-solving skills Language Required for the role: Communicative Polish and English levels Eligibility to work on this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior React Front-End Developer role focused on building and maintaining scalable platform-wide React libraries and design system components for a major financial institution. The position involves developing reusable front-end solutions, ensuring quality through testing, and supporting product teams with platform integration. It emphasizes performance, accessibility, and high engineering standards within a hybrid work model. 🗂️ Requirements: 5+ years of experience in front-end development with React, Strong expertise in JavaScript and TypeScript, Experience building and maintaining scalable front-end applications and NPM packages, Experience with unit and end-to-end testing, Proficient use of Git including advanced branch and commit management, Knowledge of accessibility standards and WCAG, Experience with Jira, Confluence, and Bitbucket, Good command of Polish and communicative English, Legal right to work in the European Union 📃 Skills: React, JavaScript, TypeScript, NPM, CSS, Jest, Testing, Cypress, Git, WCAG, Jira, Confluence, Bitbucket, ReactNative, Capacitor, WebView 🏢 Description: Empower innovation at scale — shape the future of front-end technology! Warszawa-based opportunity with hybrid work model As a Senior React Front-End Developer – Platform Integration and Design Systems , you will be working for our client, a leading financial institution, delivering robust and scalable front-end solutions. Join a team committed to building advanced platform components that empower seamless user experiences and drive digital transformation. Your main responsibilities: Develop and maintain platform-wide React libraries and components aligned with the Bank’s Design System. Implement and optimize generic functionalities and innovative technical solutions for front-end teams. Write and sustain comprehensive unit and end-to-end tests to ensure high-quality deliverables. Ensure consistency, performance, and accessibility standards are upheld across all solutions. Collaborate with cross-functional platform teams and UI/UX designers to refine components and share best practices. Provide technical guidance and support to product teams utilizing the platform solutions. Maintain clear and detailed documentation for developed components and functionalities. You're ideal for this role if you have: Over 5 years of professional experience in front-end development with React. Strong expertise in JavaScript, TypeScript, NPM, and CSS. Proven experience in building and maintaining scalable front-end applications and NPM packages. Strong knowledge of unit and end-to-end testing (e.g., Jest, Testing Library, Cypress). Proficient use of the Git version control system, including managing branches and commits (rebase, cherry-pick, revert, squash, changing commit order and descriptions). Good understanding of accessibility principles (a11y), WCAG standards, and building accessible interfaces. Experience working with Jira, Confluence, and Bitbucket. It is a strong plus if you have: Experience working with design systems or contributing to their development. Knowledge of microfrontend architecture and integration challenges. Experience with hybrid mobile applications such as React Native, Capacitor, or WebView. Familiarity with AI tools or agents in software development projects. Language required for the role: Good command of Polish and Communicative English. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Frontend Developer role focused on building and enhancing modern React-based applications for the insurance sector within an international agile team. The position involves developing scalable frontend solutions, integrating with REST APIs, ensuring code quality through testing, and mentoring junior developers. The offer targets experienced engineers ready to contribute to large, international projects using modern technologies. 🗂️ Requirements: Minimum 5 years of experience as Frontend Developer, Strong knowledge of React, Strong knowledge of TypeScript, Proficiency in JavaScript ES6+, Knowledge of SCSS, HTML5, CSS3, Experience with UI frameworks, Experience with REST API integration, Experience in unit testing, Knowledge of Git, Basic knowledge of SQL and databases, Experience working in Agile/Scrum 📃 Skills: React, TypeScript, JavaScript, SCSS, HTML5, CSS3, Bootstrap, MaterialUI, REST, Git, SQL, Agile 🏢 Description: Opis stanowiska: Poszukujemy doświadczonego Senior Frontend Developera specjalizującego się w React, który dołączy do zespołu realizującego projekty dla branży ubezpieczeniowej. Osoba na tym stanowisku będzie odpowiedzialna za rozwój nowoczesnych aplikacji frontendowych oraz współpracę z międzynarodowym zespołem w środowisku agile. Zakres obowiązków: Tworzenie i rozwój aplikacji frontendowych w oparciu o React i TypeScript Analiza wymagań biznesowych i ich przekładanie na rozwiązania techniczne Współpraca z zespołem projektowym (developerzy, testerzy, analitycy) Integracja z usługami REST API Pisanie testów jednostkowych i dbanie o jakość kodu Debugowanie oraz optymalizacja istniejących rozwiązań Wsparcie i mentoring dla mniej doświadczonych członków zespołu Wymagania: Minimum 5 lat doświadczenia na stanowisku Frontend Developera – warunek konieczny Bardzo dobra znajomość React oraz TypeScript Dobra znajomość: JavaScript ES6+, SCSS, HTML5, CSS3 Doświadczenie z frameworkami UI (Bootstrap, Material UI lub podobne) Praktyczna znajomość integracji z REST API Doświadczenie w pisaniu testów jednostkowych Znajomość Git Podstawowa znajomość SQL i pracy z bazami danych Doświadczenie w pracy w metodykach Agile/Scrum Bardzo dobra znajomość języka angielskiego (min. B2) Mile widziane: Doświadczenie z architekturą mikroserwisową Znajomość Vue.js Certyfikaty technologiczne (React, Java, Spring, SQL, AWS, Azure) Doświadczenie w projektach międzynarodowych Znajomość języka niemieckiego lub innego języka europejskiego Oferujemy: Pracę przy dużych, międzynarodowych projektach Elastyczny model pracy Konkurencyjne wynagrodzenie Możliwość rozwoju i pracy z nowoczesnymi technologiami

🏢 Summary: Senior React Front-End Developer role focused on building and maintaining scalable, platform-wide React libraries and components for a financial services environment. The position involves delivering high-quality, accessible, and performance-optimized front-end solutions aligned with a design system. You will collaborate with cross-functional teams to enhance shared components and support product teams with robust platform solutions. 🗂️ Requirements: 5+ years React frontend development experience, Strong JavaScript and TypeScript expertise, Experience building scalable frontend applications, Experience creating and maintaining NPM packages, Proficiency in unit and E2E testing, Advanced Git version control skills, Knowledge of WCAG accessibility standards, Experience with Jira Confluence Bitbucket, Good Polish and communicative English, Legal right to work in the EU 📃 Skills: React, JavaScript, TypeScript, NPM, CSS, Jest, TestingLibrary, Cypress, Git, WCAG, Jira, Confluence, Bitbucket, Microfrontend, ReactNative, Capacitor, WebView 🏢 Description: Unleash innovation at scale — shape the future of front-end technology! Warszawa-based opportunity with hybrid work model (2 days from the office) As a Senior React Front-End Developer – Financial Services , you will be working for our client, a leading financial institution, delivering robust and scalable front-end solutions. Join a team committed to building advanced platform components that empower seamless user experiences and drive digital transformation. Your main responsibilities: Develop and maintain platform-wide React libraries and components aligned with the Bank’s Design System. Implement and optimize generic functionalities and innovative technical solutions for front-end teams. Write and sustain comprehensive unit and end-to-end tests to ensure high-quality deliverables. Ensure consistency, performance, and accessibility standards are upheld across all solutions. Collaborate with cross-functional platform teams and UI/UX designers to refine components and share best practices. Provide technical guidance and support to product teams utilizing the platform solutions. Maintain clear and detailed documentation for developed components and functionalities. You're ideal for this role if you have: Over 5 years of professional experience in front-end development with React. Strong expertise in JavaScript, TypeScript, NPM, and CSS. Proven experience in building and maintaining scalable front-end applications and NPM packages. Excellent command of writing and maintaining unit and E2E tests (e.g., Jest, Testing Library, Cypress). Proficiency in Git version control, including branch management and advanced operations (rebase, cherry-pick, revert, squash). Good understanding of Web Accessibility (WCAG standards) and inclusive design principles. Experience working with Jira, Confluence, and Bitbucket. It is a strong plus if you have: Experience working with design systems or contributing to their development. Knowledge of microfrontend architecture and integration challenges. Experience with hybrid mobile applications such as React Native, Capacitor, or WebView. Familiarity with AI tools or agents in software development projects. Language required for the role: Good command of Polish and Communicative English. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data. We offer you: ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions. Enhance your skills and develop your expertise in various industries. Work on the most strategic projects available in the market. Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years. Participate in Social Events, training, and work in an international environment. Access to attractive Medical Package. Access to Multisport Program. Access to Pluralsight. Flexible hours & remote work. You can report violations in accordance with ITDS’s Whistleblower Procedure available here . Ref. number 8871

🏢 Summary: Senior React Developer role focused on building and maintaining modern, scalable web applications in a large international banking environment. The position involves designing rich, responsive user interfaces, ensuring high code quality, and supporting production releases within Agile teams. It is a long-term B2B contract with hybrid work from Kraków. 🗂️ Requirements: Proven experience delivering web applications, Strong experience building rich frontend/UI layers, Excellent knowledge of React.js, Excellent knowledge of JavaScript and TypeScript, Strong knowledge of HTML5 and CSS3, Experience with CSS preprocessors, Experience with frontend testing frameworks, Ability to create pixel-perfect UI from specifications, Experience designing responsive interfaces, Understanding of accessibility and cross-browser compatibility, Knowledge of JSON and XML data handling 📃 Skills: React, JavaScript, TypeScript, HTML5, CSS3, SASS, Less, Jest, ReactTestingLibrary, JSON, XML, Git, Node.js, Express 🏢 Description: 🌍Work mode: hybrid from Kraków - 6x per month in the office. ⏰Start: ASAP/30 days. 📝Contract: B2B. ⚙️Recruitment process: ·       I stage: 1h live coding React . ·       II stage: test online. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. About the role We are looking for a Senior React Developer to join the Business Services Digital team . The team delivers IT solutions and support for Business Services within a large-scale, international banking environment. This is a great opportunity for an experienced frontend engineer who enjoys building high-quality digital products, working in Agile teams, and contributing to modern, scalable web applications in a complex enterprise setting. Your responsibilities Design, develop, test, and implement modern web-based applications Build rich, responsive, and pixel-perfect user interfaces using React Maintain a delivery-oriented approach across application development and supporting software/data infrastructure Manage software releases and support existing systems in production Ensure code quality, maintainability, and full test coverage Contribute to and promote frontend best practices and engineering standards Mentor other team members through knowledge sharing and technical guidance Deliver solutions on time and within budget Follow internal development methodologies, security standards, and documentation requirements Drive productivity and quality improvement initiatives Coordinate releases through to Production Required experience Proven track record in delivering web applications Strong experience building rich frontend/UI layers Excellent knowledge of React.js Excellent knowledge of JavaScript and TypeScript Strong knowledge of HTML5 , CSS3 , and CSS preprocessors such as SASS or Less Experience with frontend testing frameworks such as Jest and React Testing Library Experience creating pixel-perfect UI based on detailed specifications Experience designing responsive interfaces for desktop and mobile applications Good understanding of accessibility and cross-browser compatibility Good knowledge of data marshalling/de-marshalling using JSON and XML Nice to have Experience working with Git Familiarity with IntelliJ and VS Code Good understanding of responsive web techniques Knowledge of Node.js / Express Experience designing digital products in the onboarding or banking domain What makes this opportunity interesting Work on impactful digital solutions in a global banking environment Join a mature engineering team focused on quality, delivery, and best practices Contribute to modern frontend development using React and TypeScript Competitive B2B rate

🏢 Summary: B2B contract role for a Senior Frontend Developer to architect and build advanced single-page applications in the banking domain. The position focuses on frontend architecture, performance optimization, and integration with backend services using modern web technologies. Hybrid work model with collaboration across cross-functional teams. 🗂️ Requirements: Strong experience with HTML, Strong experience with CSS, Strong experience with JavaScript, Strong experience with TypeScript, Hands-on experience with Web Components, Hands-on experience with Lit, Good knowledge of Node.js, Knowledge of npm ecosystem, Experience with Vitest or similar testing frameworks, Experience integrating REST APIs, Experience integrating GraphQL APIs 📃 Skills: HTML, CSS, JavaScript, TypeScript, WebComponents, Lit, Node.js, npm, Vitest, REST, GraphQL 🏢 Description: We are looking for a Senior Frontend Developer for our client in the banking industry RESPONSIBILITIES Architect and implement advanced user interfaces and single-page applications using TypeScript and JavaScript Define and promote best practices for frontend architecture, state management and reusable components Optimize application performance, including load times and Core Web Vitals, ensuring smooth user experience across devices Collaborate closely with backend developers, UX/UI designers, and product managers Integrate frontend applications with REST and GraphQL APIs Ensure code quality through testing and participation in development lifecycle processes REQUIREMENTS Strong experience with HTML, CSS, JavaScript, and TypeScript Hands-on experience with Web Components / Lit Good knowledge of Node.js and npm ecosystem Experience with testing frameworks such as Vitest NICE TO HAVE Experience with CI/CD pipelines Familiarity with Kafka Knowledge of NinjaFork Experience working with messaging systems (MQ) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 110-120 PLN/hour Hybrid work from Warsaw / Łódź / Gdynia / Gdańsk (3 times a week in the office) The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client Events and integration meetings, as well as participation in various initiatives, e.g., sports Access to the benefits offering (medical care, Multisport card) WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.

🏢 Summary: Senior React Developer role focused on building and maintaining modern, scalable web applications in a large international banking environment. The position involves developing high-quality, responsive frontend solutions, ensuring code quality, and supporting production systems within an Agile team. Long-term B2B contract with hybrid work model in Kraków. 🗂️ Requirements: Proven experience delivering web applications, Strong experience building rich frontend/UI layers, Excellent knowledge of React.js, Excellent knowledge of JavaScript, Excellent knowledge of TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with CSS preprocessors (SASS or Less), Experience with Jest, Experience with React Testing Library, Experience creating pixel-perfect UI from detailed specifications, Experience designing responsive interfaces for desktop and mobile, Understanding of accessibility standards, Understanding of cross-browser compatibility, Knowledge of JSON, Knowledge of XML 📃 Skills: React, JavaScript, TypeScript, HTML5, CSS3, SASS, Less, Jest, ReactTestingLibrary, JSON, XML 🏢 Description: Location: Kraków, Poland Work model: Hybrid, 6 days per month in the Kraków office Recruitment process: Test + 1-hour live coding interview in React Contract : B2B, long-term About the role We are looking for a Senior React Developer to join the Business Services Digital team . The team delivers IT solutions and support for Business Services within a large-scale, international banking environment. This is a great opportunity for an experienced frontend engineer who enjoys building high-quality digital products, working in Agile teams, and contributing to modern, scalable web applications in a complex enterprise setting. Your responsibilities Design, develop, test, and implement modern web-based applications Build rich, responsive, and pixel-perfect user interfaces using React Maintain a delivery-oriented approach across application development and supporting software/data infrastructure Manage software releases and support existing systems in production Ensure code quality, maintainability, and full test coverage Contribute to and promote frontend best practices and engineering standards Mentor other team members through knowledge sharing and technical guidance Deliver solutions on time and within budget Follow internal development methodologies, security standards, and documentation requirements Drive productivity and quality improvement initiatives Coordinate releases through to Production Required experience Proven track record in delivering web applications Strong experience building rich frontend/UI layers Excellent knowledge of React.js Excellent knowledge of JavaScript and TypeScript Strong knowledge of HTML5 , CSS3 , and CSS preprocessors such as SASS or Less Experience with frontend testing frameworks such as Jest and React Testing Library Experience creating pixel-perfect UI based on detailed specifications Experience designing responsive interfaces for desktop and mobile applications Good understanding of accessibility and cross-browser compatibility Good knowledge of data marshalling/de-marshalling using JSON and XML Nice to have Experience working with Git Familiarity with IntelliJ and VS Code Good understanding of responsive web techniques Knowledge of Node.js / Express Experience designing digital products in the onboarding or banking domain What makes this opportunity interesting Work on impactful digital solutions in a global banking environment Join a mature engineering team focused on quality, delivery, and best practices Contribute to modern frontend development using React and TypeScript Competitive B2B rate

🏢 Summary: Senior React Developer role focused on building and optimizing modern web applications using React, Angular, and TypeScript in a hybrid Warsaw-based environment. The position involves collaborating with cross-functional teams, implementing testing best practices, and working with micro front-end architectures and reactive programming. Candidates will contribute to scalable, high-performance digital products while leveraging modern front-end tools and frameworks. 🗂️ Requirements: 5+ years of front-end web development experience, Strong knowledge of React, Strong knowledge of TypeScript, Experience with Jest, Cypress, or Playwright, Experience building responsive web applications, Knowledge of micro front-end architectures, Experience with RxJS, Experience in agile SDLC environments, Ability to manage multiple projects, Legal right to work in the European Union 📃 Skills: React, Angular, TypeScript, Jest, Cypress, Playwright, RxJS, Webpack, Vite, Vitest, SSR, CSS-in-JS 🏢 Description: Unleash the Future of Web Applications — Drive Innovation with Cutting-Edge Front-End Technologies! Warsaw-based opportunity with hybrid work model (4 days per week in the office) As a Senior React Developer , you will be working for our client, a leader in web application innovation within the technology industry. You’ll contribute to building and executing challenging projects across a variety of initiatives, collaborating closely with stakeholders, UX designers, and development teams to transform requirements into high-impact deliverables. This role offers a unique chance to learn new technologies and continually elevate your skills while shaping the future of digital experiences. Your main responsibilities: Develop and maintain modern, dynamic web applications using React, Angular, and TypeScript. Collaborate with cross-functional teams to translate user requirements into clean, scalable code. Implement best practices in testing using Jest, Cypress, or Playwright to ensure quality and performance. Integrate micro front-end architectures and reactive programming techniques such as RxJS. Optimize applications for maximum speed, scalability, and responsiveness. Contribute to code reviews, documentation, and continuous improvement processes. Leverage modern build tools like Webpack and Vite to streamline development workflows. Stay updated on industry trends and introduce innovative solutions to technical challenges. You're ideal for this role if you have: 5+ years of hands-on experience in front-end web development. Strong expertise in React, TypeScript, and testing frameworks like Jest, Cypress, or Playwright. Proven ability to deliver rich, responsive web applications with clean code. Familiarity with micro front-end architectures and reactive programming, particularly RxJS. Experience working in agile SDLC environments, including research, design, and engineering phases. Excellent communication skills and ability to manage multiple projects simultaneously. Self-motivated, innovative mindset with strong organizational skills. It is a strong plus if you have: Bachelor's degree in Computer Science or related field. Experience with SSR, CSS-in-JS, Vite, Vitest, and Webpack. Knowledge of micro front-end development and advanced build pipelines. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.