Frontend Developer

🏢 Summary: Senior QA Engineer role focused on designing and maintaining automated end-to-end tests for a large web project in the tobacco industry. The position involves testing frontend and backend applications, validating REST APIs, and integrating automated tests into CI/CD pipelines. The offer includes hybrid or remote work on a long-term B2B contract. 🗂️ Requirements: 5+ years commercial experience as QA Engineer, Experience in automated testing, Practical experience with Playwright and TypeScript, Strong knowledge of JavaScript, TypeScript, HTML, CSS, Experience in REST API testing and strong knowledge of HTTP, Understanding of tokenization and hashing (MD5), Knowledge of multi-tenant architecture, Knowledge of SOA and design patterns, Experience with Git and CI/CD, Knowledge of SDLC, English C1, Polish B2 📃 Skills: Playwright, TypeScript, JavaScript, HTML, CSS, REST, HTTP, Axios, MD5, SOA, Git, CI/CD, PHP, Laravel, Postman, PHPUnit, Pest, Azure, Docker, Kubernetes 🏢 Description: Dołącz do CodeWave w roli Senior QA Engineer! CodeWave to wrocławskie studio developerskie, w którym od lat dostarczamy wydajne, skalowalne rozwiązania w technologiach webowych oraz zarządzamy infrastrukturą chmurową dla klientów – od startupów po enterprise. W pracy bardzo liczą się dla nas jakość, wzajemny szacunek i zaufanie – zarówno w zespole, jak i w relacji z klientem. Mamy zróżnicowane portfolio, w którym przeplatają się projekty komercyjne oraz rozwój własnych produktów. Jesteśmy autorami Flotiq – headless CMS-a docenianego międzynarodowo. Dołącz do Codewave w roli Senior QA Engineer. Wejdź z nami we współpracę przy jednym z naszych największych projektów dla klienta z branży tytoniowej. PODSUMOWANIE Wynagrodzenie: 16 000 – 23 000 PLN net B2B +VAT Umowa: Preferowane B2B Lokalizacja: Wrocław Tryb pracy: Hybryda/Zdalnie TECH STACK Playwright, TypeScript, JavaScript, HTML, CSS, Postman, Docker, Kubernetes CODZIENNA PRACA Projektowanie, rozwijanie i utrzymywanie testów automatycznych w Playwright (TypeScript) Realizacja i utrzymanie testów end‑to‑end Testowanie aplikacji webowych (frontend + backend) Przygotowywanie i utrzymywanie test case’ów, test planów oraz dokumentacji jakościowej Testowanie i walidacja REST API, z wykorzystaniem protokołów HTTP Analizowanie wyników i zgłaszanie błędów Współpraca z zepsołem deweloperskim Praca z systemami kontroli wersji opartymi o Git oraz integracja testów z pipeline’ami CI/CD Aktywne uczestnictwo w ceremoniach Scrumowych CZEGO OCZEKUJEMY 5+ lat komercyjnego doświadczenia jako QA Engineer (preferowane projekty e-commerce) Doświadczenie w tworzeniu testów automatycznych Praktyczna znajomość frameworka Playwright (TypeScript) Dobra znajomość web developmentu: JavaScript, TypeScript, HTML, CSS Doświadczenie w testowaniu oraz integracji REST API i bardzo dobra znajomość HTTP (mile widziana znajomość biblioteki Axios) Zrozumienie procesów tokenizacji oraz hashowania (MD5) Zrozumienie architektury multi-tenant oraz konfiguracji tenantów Dobra znajomość wzorców projektowych oraz architektury SOA Znajomość SDLC oraz doświadczenie w pracy z Git i CI/CD Raportowanie błędów i współpraca z zespołem Umiejętność rozwiązywania problemów, dbałość o szczegóły Angielski C1, Polski B2 MILE WIDZIANE Doświadczenie w marketing automation, sales funnel oraz campaign management Udział w end‑to‑end wdrożeniach narzędzi marketing automation Doświadczenie z platformami lojalnościowymi (np. Open Loyalty) Praca z narzędziami: Adobe Campaign, Adobe Analytics, Adobe Target Doświadczenie z nowoczesnymi frameworkami PHP Praktyczne doświadczenie z chmurą (Azure) Praca w środowiskach konteneryzowanych (Docker, Kubernetes) OFERTA Wynagrodzenie : 16 000 - 23 000 PLN netto na B2B+VAT Umowa: Preferowane B2B Lokalizacja: Wrocław Tryb pracy: Hybryda/Zdalnie Pełne wyposażenie do pracy (komputer, monitory itd.) Benefity: Multisport, ubezpieczenie grupowe, budżet rozwojowy, certyfikacje, szkolenia. PROCES REKRUTACYJNY Zaaplikuj na to ogłoszenie Runda 1: Rozmowa z HR (Zapoznanie, rozmowa o doświadczeniu, weryfikacja językowa) - około 30 minut Runda 2: Rozmowa Techniczna z zespołem testerskim po stronie klienta (Zapoznanie, pogłębiona rozmowa techniczna w oparciu o doświadczenie) - 60 minut Decyzja

🏢 Summary: Remote Fullstack Engineer role focused on developing and maintaining modern web applications using Vue.js, PHP 8.x, and Laravel for a large enterprise client. The position includes AI/LLM integrations, API development, CI/CD automation, and performance optimization in a 30+ person implementation team. The offer includes B2B cooperation, 16,000–22,000 PLN net + VAT, and additional benefits. 🗂️ Requirements: 5+ years of commercial experience in a similar role, Commercial experience with PHP, Commercial experience with Laravel, Commercial experience with Vue.js, Hands-on experience with LLM pipelines or AI agents, Experience in enterprise or e-commerce projects, Very good knowledge of MySQL or PostgreSQL, Experience with REST APIs, Experience with GraphQL, Experience with Docker, Experience with CI/CD tools, English level C1 minimum, Polish level B2 minimum 📃 Skills: JavaScript, Vue, PHP, Laravel, MySQL, PostgreSQL, Redis, Docker, GitLab, CI/CD, REST, GraphQL, LLM, Azure, Kubernetes 🏢 Description: Dołącz do CodeWave w roli Fullstack Engineer. Wejdź z nami we współpracę przy jednym z naszych największych projektów dla klienta z branży tytoniowej. PODSUMOWANIE Wynagrodzenie: 16 000 – 22 000 PLN net B2B +VAT Umowa: Preferowane B2B Lokalizacja: Zdalnie Tryb pracy: Zdalnie TECH STACK JavaScript, Vue.js, PHP 8.x, Laravel, MySQL / PostgreSQL, Redis, Docker, GitLab CI/CD, REST API, GraphQL ZESPÓŁ Będziesz częścią zespołu Dev w Codewave, a na projekcie częścią 30+ osobowego zespołu wdrożeniowego w strukturach klienta (API Team). CODZIENNA PRACA - Rozwijanie i utrzymanie nowoczesnych aplikacji webowych w oparciu o Vue, PHP i Laravel - Rozwijanie i integracja AI/LLM oraz agentów - Projektowanie i implementacja REST API oraz GraphQL - Optymalizacja wydajności aplikacji oraz baz danych - Współpraca z zespołem DevOps przy wdrożeniach i automatyzacji procesów CI/CD - Implementacja testów jednostkowych i integracyjnych - Udział w projektowaniu architektury aplikacji i wdrażaniu dobrych praktyk - Wsparcie zespołów produktowych oraz rozwiązywanie wyzwań związanych z aplikacjami i wydajnością CZEGO OCZEKUJEMY - 5 lat komercyjnego doświadczenia na podobnym stanowisku - Komercyjnego doświadczenia z PHP+Laravel oraz Vue.js - Hands-on doświadczenie w pracy z LLM pipeline’ami lub agentami - Doświadczenie w projektach Enterprise lub e-commerce - Bardzo dobra znajomość MySQL/PostgreSQL - Doświadczenie w pracy z API (REST/GraphQL) - Umiejętność pracy z Dockerem i narzędziami CI/CD (GitLab) - Proaktywność, otwartość i dociekliwość w działaniu - Sumienność i samodzielność w wykonywanych zadaniach - Inicjowanie usprawnień w kodzie i procesach - Język angielski min. C1, język polski min. B2 MILE WIDZIANE - Praktyczne doświadczenie z chmurą (Azure) - Praca w środowiskach konteneryzowanych (Docker, Kubernetes) OFERTA - Wynagrodzenie: 16 000 - 22 000 PLN netto na B2B+VAT - Pełne wyposażenie do pracy (komputer, monitory itd.) - Benefity: Multisport, ubezpieczenie grupowe, budżet rozwojowy PROCES REKRUTACYJNY - Runda 1: Rozmowa z HR (zapoznanie, rozmowa o doświadczeniu, weryfikacja językowa) – około 30 min - Runda 2: Rozmowa techniczna z Liderem projektu klienta (zapoznanie, doświadczenie, pogłębiona rozmowa techniczna) – 60 min - Runda 3: Rozmowa techniczna z zespołem (zapoznanie, dopasowanie) – 60 min - Decyzja

🏢 Summary: Senior QA Engineer role focused on designing and maintaining automated end-to-end tests for a large-scale web project, with strong emphasis on Playwright and AI/LLM pipeline integration. The position involves testing web applications (frontend and backend), validating REST APIs, and debugging complex flows across AI, tests, APIs, and application layers. Offered in a hybrid/remote model with B2B contract. 🗂️ Requirements: 5+ years commercial experience as QA Engineer, Strong experience in automated testing, Advanced Playwright (TypeScript) knowledge, Proficiency in JavaScript and TypeScript, Knowledge of HTML and CSS, Experience with REST API and HTTP, Experience with JSON and asynchronous flows, Hands-on experience with LLM pipelines or agents, Experience with prompt tuning and structured outputs (JSON/schema), Knowledge of PHP and Laravel architecture, Experience with PostgreSQL, Experience with Git and CI/CD, End-to-end system debugging skills, English C1, Polish B2 📃 Skills: Playwright, TypeScript, JavaScript, HTML, CSS, REST, HTTP, JSON, LLM, PHP, Laravel, PostgreSQL, Git, CI/CD, Postman, Docker, Kubernetes, Azure 🏢 Description: Dołącz do CodeWave w roli AI QA Engineer! CodeWave to wrocławskie studio developerskie, w którym od lat dostarczamy wydajne, skalowalne rozwiązania w technologiach webowych oraz zarządzamy infrastrukturą chmurową dla klientów – od startupów po enterprise. W pracy bardzo liczą się dla nas jakość, wzajemny szacunek i zaufanie – zarówno w zespole, jak i w relacji z klientem. Mamy zróżnicowane portfolio, w którym przeplatają się projekty komercyjne oraz rozwój własnych produktów. Jesteśmy autorami Flotiq – headless CMS-a docenianego międzynarodowo. Dołącz do Codewave w roli AI QA Engineer. Wejdź z nami we współpracę przy jednym z naszych największych projektów dla klienta z branży tytoniowej. PODSUMOWANIE Wynagrodzenie: 16 000 – 23 000 PLN net B2B +VAT Umowa: Preferowane B2B Lokalizacja: Wrocław Tryb pracy: Hybryda/Zdalnie TECH STACK Playwright, TypeScript, JavaScript, HTML, CSS, Postman, Docker, Kubernetes CODZIENNA PRACA Projektowanie, rozwijanie i utrzymywanie testów automatycznych i reużywalnych flow w Playwright (TypeScript) Rozwijanie i integracja pipeline’ów AI/LLM oraz agentów Praca z promptami (prompt tuning) oraz definiowanie strukturalnych outputów (JSON/schema) Realizacja i utrzymanie testów end‑to‑end Testowanie aplikacji webowych (frontend + backend) Przygotowywanie i utrzymywanie test case’ów, test planów oraz dokumentacji jakościowej Testowanie i walidacja REST API, z wykorzystaniem protokołów HTTP Analizowanie wyników i zgłaszanie błędów Debugowanie przepływów systemowych: AI → testy → API → aplikacja Identyfikowanie i rozwiązywanie problemów związanych z autentykacją, cookies, środowiskami oraz błędnymi scenariuszami generowanymi przez AI Współpraca z zespołem deweloperskim Praca z Git oraz integracja testów z pipeline’ami CI/CD Aktywne uczestnictwo w ceremoniach Scrumowych CZEGO OCZEKUJEMY 5+ lat komercyjnego doświadczenia jako QA Engineer Doświadczenie w tworzeniu testów automatycznych Zaawansowana znajomość Playwright (TypeScript), w tym: fixtures, storage state, network interception, async/debugging Znajomość JavaScript, TypeScript, HTML, CSS Praktyczne doświadczenie w pracy z API, modelami danych JSON oraz asynchronicznymi przepływami (kolejki, eventy) Bardzo dobra znajomość REST API oraz HTTP Hands-on doświadczenie w pracy z LLM pipeline’ami lub agentami Doświadczenie w prompt tuningu oraz pracy ze strukturalnymi outputami (JSON/schema) Zrozumienie MCP tools oraz mechanizmów pobierania danych Znajomość architektury PHP / Laravel Znajomość baz danych (Postgres, konfiguracja, tenanty) Umiejętność debugowania systemowego end-to-end (AI → testy → API → aplikacja) Znajomość SDLC oraz doświadczenie w pracy z Git i CI/CD Umiejętność rozwiązywania problemów oraz dbałość o szczegóły Angielski C1, Polski B2 MILE WIDZIANE Praktyczne doświadczenie z chmurą (Azure) Praca w środowiskach konteneryzowanych (Docker, Kubernetes) OFERTA Wynagrodzenie : 16 000 - 23 000 PLN netto na B2B+VAT Umowa: Preferowane B2B Lokalizacja: Wrocław Tryb pracy: Hybryda/Zdalnie Pełne wyposażenie do pracy (komputer, monitory itd.) Benefity: Multisport, ubezpieczenie grupowe, budżet rozwojowy, certyfikacje, szkolenia. PROCES REKRUTACYJNY Zaaplikuj na to ogłoszenie Runda 1: Rozmowa z HR (Zapoznanie, rozmowa o doświadczeniu, weryfikacja językowa) - około 30 minut Runda 2: Rozmowa Techniczna z zespołem testerskim po stronie klienta (Zapoznanie, pogłębiona rozmowa techniczna w oparciu o doświadczenie) - 60 minut Decyzja

🏢 Summary: Senior Frontend Developer role focused on building and maintaining complex cloud-based web applications for network configuration, monitoring, and optimization. The position involves developing new features, maintaining a custom UI component library, and contributing to code and UX reviews within a global team. Hybrid work model with long-term B2B cooperation. 🗂️ Requirements: 5+ years experience building complex web applications, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with React, Experience with Redux, Experience with Redux Toolkit, Experience writing well-tested maintainable code, Experience with REST API integration, Proficient English communication skills 📃 Skills: JavaScript, TypeScript, HTML5, CSS3, React, Redux, ReduxToolkit, REST, Cypress, ReactTestingLibrary, Webpack, Lerna, Storybook, Cytoscape, ChartJS, MapLibre 🏢 Description: For a client, we are looking for a Senior Frontend Developer Salary: 150-170 net+VAT B2B Hybrid model: 1 day per week from the office in Warsaw or Kraków RESPONSIBILITIES About our Team As a team member, you will have the possibility to participate in the whole development process in Network Cloud Team projects. The primary objective of our applications is to set up, configure, monitor, and optimize servers and networks for clients globally. Working in our team allows you to learn various network automation techniques, be part of and create a mobile network future, develop cloud-based applications and have a real impact on how it will look like. Role and Responsibilities Develop new features, as well as maintain existing ones. Implementation and maintenance of custom UI components library. Participate in code review, as well as UX design review. Cooperation with colleagues from other Centers around the world. REQUIREMENTS 5+ years of experience building complex web applications using JavaScript, TypeScript, HTML5, CSS3. Experience with React, Redux and Redux Toolkit; Familiarity writing well-tested, maintainable code (knowledge of Cypress.io and React Testing Library is a plus). Familiarity with REST API integration Proficient English communication skills. NICE TO HAVE Experience with Webpack; Experience with Lerna or other mono-repo solutions; Experience with Storybook and component libraries development; Experience with data visualization (knowledge of Cytoscape.js, react-chartjs-2, maplibre or similar libraries is a plus); WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 150-170 PLN/hour Hybrid work from Warsaw or Cracow (1 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, life insurance, 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. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Iga Olszewska-Magnowska Senior IT Delivery Consultant iga.olszewska@speedapp.pl

🏢 Summary: Senior Frontend Developer role focused on hands-on development and technical ownership of frontend architecture for a large-scale marketplace platform (web and mobile). The position combines daily coding in React ecosystem with architectural decision-making and technical leadership within a small team. You will develop and maintain web and mobile applications, ensuring code quality and frontend consistency. 🗂️ Requirements: 5+ years experience as Frontend Developer, Very strong JavaScript (ES6+) knowledge, Very strong React knowledge, Commercial experience with React Native, Experience with Next.js (13+), Experience with REST APIs, Experience with GraphQL, Experience with Styled Components, Experience using AI tools in development (e.g. Claude Code), Ability to design and maintain frontend architecture, Experience with code review and technical leadership 📃 Skills: JavaScript, ES6, React, ReactNative, Next.js, REST, GraphQL, StyledComponents, AI, Claude, Storybook, Formik, Docker, CI/CD 🏢 Description: Cześć, nazywamy się Bee Talents i od 2015 roku zajmujemy się budowaniem zespołów w różnych branżach na całym świecie. Dziś zapraszamy Cię do procesu rekrutacyjnego dla naszego klienta RestaurantWeek. RestaurantWeek to organizator jednych z największych festiwali restauracyjnych w Europie oraz rozwijająca się platforma typu marketplace do rezerwacji restauracji i odkrywania wyjątkowych doświadczeń kulinarnych. Firma działa w Polsce, Czechach i Niemczech, a jej produkty cyfrowe obsługują setki tysięcy użytkowników rocznie. Zespół rozwija zarówno aplikacje webowe, jak i mobile, które realnie wpływają na sposób, w jaki ludzie wybierają i rezerwują restauracje. Do zespołu RestaurantWeek szukamy osoby na stanowisko Senior Frontend Developer, która przejmie merytoryczną opiekę nad frontendem w organizacji  w bardzo praktycznym, “hands-on” modelu. To rola łącząca codzienny development z wpływem na decyzje techniczne. Szukamy osoby, która intensywnie programuje, ale jednocześnie spina architekturę frontendu, wyznacza kierunki techniczne i jest naturalnym punktem odniesienia dla mniejszego zespołu. Warunki współpracy: 🎯 Oferowane stanowisko: Senior Frontend Developer 💰 Wynagrodzenie: 19-24k PLN/mies. netto na B2B ⏱ Wymiar pracy: full-time 👩‍💻 Tryb pracy: remote, z możliwością pracy hybrydowej 📍Lokalizacja biura: Warszawa, Kamienica Pod Gigantami (Plac Trzech Krzyży) 🇬🇧 Język pracy: polski i angielski (min. B2/C1). Będziesz pracować nad rozwojem i utrzymaniem: aplikacji webowych (React, Next.js), aplikacji mobilnej (React Native), paneli administracyjnych i narzędzi wewnętrznych, elementów systemu marketplace. Do Twoich zadań będzie należeć: rozwój nowych feature’ów w produkcie marketplace, współtworzenie i porządkowanie architektury frontendu, dbanie o spójność i jakość kodu, code review i wsparcie zespołu, ścisła współpraca z produktem i designem, analiza ryzyk technicznych i proponowanie rozwiązań, aktywne wykorzystanie AI w codziennym developmentcie. Szukamy osoby z: 5+ latami doświadczenia jako Frontend Developer, bardzo dobrą znajomością JavaScript (ES6+), bardzo dobrą znajomością React, doświadczeniem w React Native, doświadczeniem w Next.js (13+), praktyką pracy z REST i GraphQL, Styled Components, doświadczeniem w pracy z AI w developmentcie (np. Claude Code lub podobne narzędzia). Mile widziane: Storybook, Formik, Docker, CI/CD, doświadczenie w e-commerce / marketplace / booking systems. Co oferujemy: pracę nad produktem o dużej skali (web + mobile + wiele aplikacji), wpływ na architekturę i kierunek rozwoju frontendu, mały, zgrany zespół i szybkie procesy decyzyjne, środowisko otwarte na nowe technologie i narzędzia (w tym AI w codziennej pracy), prywatna opieka medyczna (LuxMed) i karta Multisport, budżet rozwojowy + dofinansowanie szkoleń i kursów, dostęp do benefitów festiwalowych i wiele innych niespodzianek. Proces rekrutacji: Ok. 30-minutowa wstępna rozmowa z rekruterem z Bee Talents. Rozmowa techniczno-case’owa (bez live codingu) z zespołem RestaurantWeek. Final call z Head of Product RestaurantWeek + osobą techniczną.

🏢 Summary: Full-time, 100% remote Senior Frontend Developer role focused on building and scaling complex, responsive web applications powered by AI-driven platforms. The position involves architecting high-quality front-end solutions, integrating with back-end services, and ensuring performance, scalability, and cross-browser compatibility. The role also includes driving best practices, code quality, and modern front-end standards within the team. 🗂️ Requirements: Strong knowledge of HTML5, CSS3, JavaScript (ES6), Strong understanding of DOM, Experience with React.js, Experience with Material UI, Experience with Responsive Design and cross-browser compatibility, Familiarity with SASS or LESS, Understanding of BEM methodology, Knowledge of CSS-in-JS, Knowledge of browser storage (cookies, localStorage, sessionStorage), Proficiency with npm or yarn, Experience with Jest or equivalent testing frameworks, Understanding of SEO best practices, Familiarity with TypeScript, Knowledge of SSR and service workers, Experience with Webpack, Vite, or Rollup, Understanding of browser extensions integration 📃 Skills: HTML5, CSS3, JavaScript, ES6, DOM, React, MaterialUI, SASS, LESS, BEM, CSS-in-JS, cookies, localStorage, sessionStorage, npm, yarn, Jest, TypeScript, SSR, Webpack, Vite, Rollup, SEO, ServiceWorkers 🏢 Description: Senior Frontend Developer (100% remote) 💰 Salary: 20,000-23,000 PLN/month 🌎 100% Remote 🕦 Full-time position ☑️ B2B or Contract of Employment We are looking for a Senior Frontend Developer for a partner client that helps businesses use artificial intelligence to run more efficiently and grow faster. The company builds and provides digital platforms and consulting services that enable organizations to manage operations, analyze data, and improve performance. Their solutions combine AI, automation, and deep business expertise to help clients simplify workflows, gain insights, and deliver greater value. Requirements: HTML5 , CSS3 , JavaScript (ES6) Strong understanding of the Document Object Model (DOM) Skilled in Responsive Design and cross-browser compatibility Experience with React.js and Material UI Familiarity with CSS preprocessors such as SASS or LESS Understanding of BEM methodology and CSS-in-JS approaches Knowledge of browser storage mechanisms (cookies, localStorage, sessionStorage) Proficient in using package managers (npm/yarn) Experience in unit testing using Jest or equivalent frameworks Understanding of SEO best practices Familiarity with TypeScript for type-safe, large-scale applications Knowledge of server-side rendering (SSR) and service workers Experience with code bundling and modern module bundlers (e.g., Webpack, Vite, Rollup) Understanding of browser extensions and their integration with web applications Responsibilities: Develop and maintain  complex, responsive user interfaces for large-scale web applications. Architect and integrate front-end components with back-end APIs and services , ensuring security, scalability, and performance. Drive the implementation of pixel-perfect UI/UX designs across browsers and devices. Provide technical mentorship to junior developers and guide the team in adopting modern best practices. Conduct code reviews , enforce standards, and maintain a clean, modular codebase. Evaluate and recommend new frameworks, tools, and libraries to enhance productivity. Manage project timelines, estimate development efforts, and collaborate effectively with cross-functional teams. Maintain comprehensive front-end documentation , design patterns, and style guides. Stay updated with industry trends , emerging technologies, and front-end innovations to continuously improve team capabilities. Participate in architectural discussions , ensuring long-term scalability and maintainability of the front-end ecosystem. Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com

🏢 Summary: Senior Frontend Engineer role focused on building and evolving a browser-based 3D design platform for modeling real-world physical systems. The position involves owning frontend features end-to-end, contributing to frontend architecture, collaborating across teams, and occasionally working with backend systems in a hybrid Warsaw-based setup. 🗂️ Requirements: 5+ years building production user interfaces in JavaScript and TypeScript, React experience, Knowledge of component-based frontend architecture, Experience integrating frontends with backend services and APIs, Ability to own features end-to-end, Willingness to work with backend code, Knowledge of system design, testing, refactoring, and technical writing, CS degree or equivalent production software experience, Fluent written and spoken English 📃 Skills: TypeScript, JavaScript, React, GraphQL, three.js, PostgreSQL, Ruby, Rails, Python, Playwright, Git, CAD 🏢 Description: Salary: 24,000 - 28,000 PLN/month Hybrid, Warsaw (2 Days/Week) Full-time Employment contract (UOP) via Employer of Record We're looking for a Senior Frontend Engineer for a software company whose platform lets professionals design real-world physical systems in an interactive, browser-based 3D environment. You'd join the team that owns the core of the product: the design surface where users model actual sites in a 3D canvas, backed by CAD tooling and a data model that keeps designs accurate to the physical world. Working stack: - TypeScript - JavaScript - React - GraphQL - three.js - PostgreSQL - Ruby on Rails - Python A senior individual contributor role reporting into engineering leadership. You'll own features end-to-end, from technical design through to production support, and help steer the frontend architecture the team relies on. Requirements: - 5+ years building production user interfaces in JavaScript and TypeScript - React experience and a firm grasp of component-based frontend architecture - Experience wiring frontends to backend services and APIs - Comfort owning features end-to-end, from scoping through to production - Willingness to step beyond the frontend when a feature calls for it, including reading and touching backend code (Ruby on Rails familiarity is a plus) - Engineering fundamentals: system design, testing, refactoring, and clear technical writing - A CS degree or an equivalent hands-on track record shipping production software - Fluent in written and spoken English Nice to Have: - GraphQL in production - three.js or another 3D graphics library - Ruby on Rails or Python - Playwright or a comparable end-to-end testing framework - Git in a collaborative, multi-engineer codebase - Any exposure to CAD software - Experience with distributed teams in a hybrid setup Key Responsibilities: - Build and ship frontend experiences that make designing faster and more accurate - Partner with Product, Design, and Engineering to scope, build, and release features - Write clean, well-tested code and raise the bar through code reviews and technical discussions - Strengthen reliability with automated tests and a share of the team's on-call rotation - Contribute to shared frontend architecture, tooling, and technical standards - Pick up backend work when it's needed to land the features you own - Support a collaborative engineering culture through mentoring, planning, and cross-team work

🏢 Summary: Senior Frontend Engineer role focused on building and enhancing scalable web applications for a global e-commerce platform. The position involves designing high-quality, responsive user interfaces, optimizing performance, and contributing to frontend architecture using modern React and TypeScript ecosystems. You will collaborate with cross-functional teams to deliver robust, reusable, and maintainable frontend solutions. 🗂️ Requirements: Degree in Computer Science or equivalent experience, 4+ years of software engineering experience, Commercial experience in building production web applications, Strong proficiency in TypeScript including generics and strict mode, Expertise in React ecosystem including React 19 and React Router, Experience with modern bundlers, Experience with micro-frontend architecture and Module Federation, Experience with state management libraries, Experience with data-fetching libraries, Experience with unit and E2E testing, Experience publishing internal packages and Semantic Versioning, Experience with CI/CD pipelines and release workflows, Understanding of cloud computing principles, Experience with SQL and relational databases, Knowledge of API design and distributed applications 📃 Skills: JavaScript, TypeScript, React, ReactRouter, Rsbuild, Webpack, Vite, ModuleFederation, Zustand, TanStackQuery, RxJS, HeroUI, Tailwind, Jest, TestingLibrary, Playwright, Azure, Kubernetes, AzureDevOps, GitHubActions, Jenkins, SQL, MySQL, PostgreSQL 🏢 Description: Position: Senior Frontend Engineer Type of contract: COE (UoP) up to 22 700 PLN gross/month Working model: fully remote You can join our client and work on a modern digital platform designed to better connect shoppers and retailers within the global e-commerce ecosystem. The project focuses on building and enhancing scalable web applications and core services that power user interactions. You’ll collaborate closely with product and design teams to deliver intuitive, high-performance user experiences. The environment emphasizes innovation, usability, and continuous improvement of frontend architecture. Role summary: As a Senior Engineer, you will take ownership of designing and developing responsive, high-quality user interfaces while collaborating with cross-functional teams. The role involves translating UI/UX designs into functional applications, improving performance, and ensuring consistency through reusable components. You’ll also contribute to code quality through reviews and support architectural decisions. The position requires strong expertise in modern frontend technologies, especially React and TypeScript, along with experience in scalable application development. Responsibilities: Design and develop modern, responsive user interfaces Collaborate with designers, backend engineers, and DevOps teams Review code and maintain high engineering standards Build reusable UI components and optimize performance Ensure cross-browser compatibility and accessibility Key requirements: Degree in Computer Science (or equivalent experience) 4+ years of experience in software engineering Hands-on experience in writing production code for web applications; Practical knowledge in front-end technologies such as JavaScript, TypeScript, CSS, HTML, with strong proficiency in TypeScript (generics, type-safe APIs, strict mode); Expertise in the React ecosystem including React 19, React Router, modern bundlers (Rsbuild/Webpack/Vite), and micro-frontend architectures (Module Federation); Experience with state management and data-fetching libraries such as Zustand, TanStack React Query, and reactive patterns with RxJS; Familiarity with modern component libraries and styling toolchains-  HeroUI, Tailwind CSS, design-token-driven theming; Experience with unit and E2E testing frameworks such as Jest, Testing Library, and Playwright; Experience working with internal packages and publishing them to a private registry and Semantic Versioning; Familiarity with CI/CD pipelines and release workflows- Azure DevOps, GitHub Actions, or Jenkins- including PR validation, artifact promotion, and multi-environment deploys; An understanding of cloud computing principles and practices; experience with production applications in cloud environments. Azure and Kubernetes experience is preferred; Knowledge in key programming concepts like memory management, optimization techniques, API design, relational mapping frameworks, and distributed applications; An understanding of database concepts and experience writing SQL in a relational database such as MySQL or PostgreSQL; Familiarity with monitoring and logging solutions; Self-starter who can move projects forward by filling in the gaps on Agile teams, from delivering complete, well-defined functionalities with high quality standards, through reviewing other Engineers’ code to contributing to design sessions. Offer: COE, up to 22 700 PLN gross per month Private healthcare, life insurance, sports card, and lunch subsidy Learning and development support (including tuition assistance) Employee Assistance Program Remote or hybrid work model supporting work–life balance Opportunity to collaborate with experienced engineers on global-scale e-commerce solutions

🏢 Summary: Senior React Developer role focused on building and optimizing modern, scalable web applications using cutting-edge front-end technologies in a hybrid work model. The position involves collaborating with cross-functional teams, implementing micro front-end architectures, and ensuring high-quality code through modern testing practices. It offers the opportunity to drive innovation and continuously enhance technical expertise. 🗂️ Requirements: 5+ years of experience in front-end web development, Strong expertise in React, Strong expertise in TypeScript, Experience with testing frameworks (Jest, Cypress, or Playwright), Experience building responsive, scalable web applications, Familiarity with micro front-end architecture, Knowledge of reactive programming (RxJS), Experience with modern build tools, Experience working in Agile SDLC environments, Legal right to work in the European Union 📃 Skills: React, Angular, TypeScript, JavaScript, Jest, Cypress, Playwright, RxJS, Webpack, Vite, Vitest, SSR, CSS-in-JS, HTML, CSS 🏢 Description: Unleash the Future of Web Applications — Drive Innovation with Cutting-Edge Front-End Technologies! Warsaw-based opportunity with hybrid work model As a Senior Front-End 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, Angular, 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: (optional) 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. Language Required for the role: Fluent Polish and 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 Engineer role focused on building and enhancing scalable web applications for a global e-commerce platform. The position involves designing responsive user interfaces, optimizing performance, and contributing to frontend architecture using modern technologies. You will collaborate with cross-functional teams to deliver high-quality, reusable, and accessible UI solutions. 🗂️ Requirements: Degree in Computer Science or equivalent experience, 4+ years of software engineering experience, Strong knowledge of JavaScript, TypeScript, HTML, CSS, Expertise in React ecosystem, Experience with state management libraries, Experience with testing frameworks, Experience with CI/CD pipelines, Experience with cloud environments, Understanding of APIs and distributed systems, Knowledge of SQL databases 📃 Skills: JavaScript, TypeScript, HTML, CSS, React, Zustand, ReactQuery, RxJS, Jest, Playwright, CI/CD, Azure, Kubernetes, SQL, APIs, Microfrontends, Routing, Bundlers 🏢 Description: Position: Senior Frontend Engineer Type of contract: COE (UoP) up to 22 700 PLB gross/month Working model: fully remote You can join our client and work on a modern digital platform designed to better connect shoppers and retailers within the global e-commerce ecosystem. The project focuses on building and enhancing scalable web applications and core services that power user interactions. You’ll collaborate closely with product and design teams to deliver intuitive, high-performance user experiences. The environment emphasizes innovation, usability, and continuous improvement of frontend architecture. Role summary: As a Senior Engineer, you will take ownership of designing and developing responsive, high-quality user interfaces while collaborating with cross-functional teams. The role involves translating UI/UX designs into functional applications, improving performance, and ensuring consistency through reusable components. You’ll also contribute to code quality through reviews and support architectural decisions. The position requires strong expertise in modern frontend technologies, especially React and TypeScript, along with experience in scalable application development. Responsibilities: Design and develop modern, responsive user interfaces Collaborate with designers, backend engineers, and DevOps teams Review code and maintain high engineering standards Build reusable UI components and optimize performance Ensure cross-browser compatibility and accessibility Key requirements: Degree in Computer Science (or equivalent experience) 4+ years of experience in software engineering Hands-on experience in writing production code for web applications; Practical knowledge in front-end technologies such as JavaScript, TypeScript, CSS, HTML, with strong proficiency in TypeScript (generics, type-safe APIs, strict mode); Expertise in the React ecosystem including React 19, React Router, modern bundlers (Rsbuild/Webpack/Vite), and micro-frontend architectures (Module Federation); Experience with state management and data-fetching libraries such as Zustand, TanStack React Query, and reactive patterns with RxJS; Familiarity with modern component libraries and styling toolchains-  HeroUI, Tailwind CSS, design-token-driven theming; Experience with unit and E2E testing frameworks such as Jest, Testing Library, and Playwright; Experience working with internal packages and publishing them to a private registry and Semantic Versioning; Familiarity with CI/CD pipelines and release workflows- Azure DevOps, GitHub Actions, or Jenkins- including PR validation, artifact promotion, and multi-environment deploys; An understanding of cloud computing principles and practices; experience with production applications in cloud environments. Azure and Kubernetes experience is preferred; Knowledge in key programming concepts like memory management, optimization techniques, API design, relational mapping frameworks, and distributed applications; An understanding of database concepts and experience writing SQL in a relational database such as MySQL or PostgreSQL; Familiarity with monitoring and logging solutions; Self-starter who can move projects forward by filling in the gaps on Agile teams, from delivering complete, well-defined functionalities with high quality standards, through reviewing other Engineers' code to contributing to design sessions. Offer: COE, up to 22 700 PLN gross per month Private healthcare, life insurance, sports card, and lunch subsidy Learning and development support (including tuition assistance) Employee Assistance Program Remote or hybrid work model supporting work–life balance Opportunity to collaborate with experienced engineers on global-scale e-commerce solutions