Senior Frontend Developer

🏢 Summary: Offer for an experienced React FrontEnd Developer to design and build responsive, high-performance user interfaces in a hybrid model in Warsaw. The role focuses on developing modern web applications using React and related technologies, with strong emphasis on testing, accessibility, and performance optimization. The position involves close collaboration with cross-functional teams to deliver robust, user-centric digital products. 🗂️ Requirements: 6+ years of experience in JavaScript development, 6+ years of experience in TypeScript development, Commercial experience with React.js, Experience with Redux, Hands-on experience with HTML5, Hands-on experience with CSS3, Ability to write cross-browser compatible code, Understanding of object-oriented programming concepts and design patterns, Knowledge of functional programming paradigms, Understanding of asynchronous programming, Experience with TDD, Experience with continuous integration, Knowledge of Git and branch management, Experience with front-end debugging tools, Experience working in Agile methodology 📃 Skills: JavaScript, TypeScript, React, Redux, Next.js, HTML5, CSS3, Git, TDD, CI, OOP, FP 🏢 Description: React FrontEnd Developer IT · Warsaw (City Center) · Hybrid About the Client Our Client is a fast-growing, international technology company that provides innovative digital solutions for the global market. They are currently expanding and developing their R&D center in Warsaw. They are a leader in AI-powered enterprise operations, delivering digital solutions and consulting services that drive value and transform businesses. They specialize in using advanced technology to streamline operations, improve efficiency, and unlock new revenue opportunities, particularly within the private capital markets. With over a decade of experience supporting high-growth companies, they bring deep domain expertise and a proven ability to turn technology into a strategic advantage. Role Overview We are seeking a skilled React FrontEnd Developer to design and develop responsive user interfaces. In this role, you will collaborate with cross-functional teams to deliver robust, user-centric solutions while driving best practices in testing, accessibility, and performance optimization. Key Responsibilities UI Development: Designing and developing responsive user interfaces using React Testing & Integration: Implementing and maintaining TDD in applications and continuous integration. Driving best practices in testing, accessibility, and performance optimization. Collaboration: Collaborating with a cross-functional team of project managers, project analysts, and sales staff to deliver high-quality, interactive products on time. Collaborating cross-functionally with design, backend, QA, and product teams to deliver robust and user-centric solutions. Requirements & Qualifications Experience & Education: 6+ years of experience in JavaScript and TypeScript development. A Bachelor's degree in Computer Science or equivalent is preferred. Core Tech Stack: Must know a modern front-end JS framework, such as React.js + Redux; Next.js is a bonus. Hands-on experience with HTML5, CSS3. Proficiency in writing cross-browser compatible code. Programming Paradigms: Should understand OO concepts and design patterns, and their application to JavaScript development. Knows functional programming paradigms. Understands asynchronous programming paradigms and best practices. Tools & Debugging: Git and branch management knowledge. Experience debugging front-end problems and a knowledge of front-end debugging tools. Familiarity with custom package creation and integration. Soft Skills & Methodology: Experience with Agile methodologies and development practices. Good communication skills and good organization skills. Ability to work under pressure and deliver against tight deadlines. What Is Offered Compensation: Monthly compensation up to $4,800 USD . Contract Type: B2B contract via Optiveum. Work Model: Hybrid (3 days working from the office located in the center of Warsaw, 2 days working from home). Stability: Long-term cooperation with a stable, international organization.

🏢 Summary: B2B contract for a Senior Performance Test Engineer to design, execute, and integrate advanced load and stress testing for a production-scale gaming platform, with remote work until June 2026 and then onsite in Warsaw. The role focuses on identifying performance bottlenecks, building reusable test scripts, and embedding performance testing into CI/CD pipelines. The position offers up to 5900 EUR net with a two-step online recruitment process. 🗂️ Requirements: 5+ years of hands-on performance and load testing experience, Strong practical experience with k6 or Gatling or JMeter or Locust, Experience building complex performance test scripts from scratch, Understanding of backend architecture and databases, Ability to analyze metrics from Grafana or Datadog or New Relic, Knowledge of HTTP and WebSockets, Experience testing APIs under load including authentication and concurrent sessions, Experience integrating performance tests into CI/CD pipelines, Proficiency with Git, Fluent English at B2+ level 📃 Skills: k6, Gatling, JMeter, Locust, Grafana, Datadog, NewRelic, WebSocket, HTTP, CI/CD, Git, APIs, Databases 🏢 Description: Employer: International cassino games studio Location: until june 2026 remote, then 5 days from the office in Warsaw Salary: up to 5900 EUR net Cooperation model: B2B Start date: ASAP Recruitment process: 2 online interviews and recruitment task Technology stack: k6 or Gatling or JMeter or or Locus, Grafana or Datadog or New Relic, WebSocket Your role is to: -> Design and execute load, stress, spike, and soak tests against critical platform flows; -> Analyze results and pinpoint exactly where and why performance degrades — not just that it does; -> Work closely with backend engineers to understand system architecture and target the right bottlenecks; -> Build and maintain performance test scripts that are reusable, version controlled, and easy to update as the product changes; -> Integrate performance tests into CI/CD pipelines to catch regressions early; -> Define performance benchmarks and thresholds in collaboration with engineering and product teams; -> Monitor platform behavior under load using observability tools and correlate metrics with test results; -> Document findings clearly and present actionable recommendations to engineering teams; Your skills and experiences: -> 5+ years of hands-on performance and load testing experience on production-scale systems; -> Strong practical experience with k6, Gatling, JMeter, or Locust — you've built complex scripts from scratch; -> Good understanding of backend architecture, databases, and how infrastructure behaves under load; -> Comfortable reading and interpreting metrics from tools like Grafana, Datadog, New Relic, or similar; -> Solid understanding of HTTP, WebSockets, and real-time communication protocols; -> Experience testing APIs under load including auth flows, concurrent sessions, and stateful scenarios; -> Familiar with CI/CD pipelines and integrating performance tests into automated build processes; -> Fluent with Git and working within agile engineering teams; -> Curious by nature — you enjoy understanding why a system behaves the way it does under pressure; -> Sharp analytical mind — you can look at a wall of metrics and know exactly where to focus; -> Clear communicator — you can explain a complex performance issue to a developer and a product manager in the same conversation; -> Self-driven — you don't wait to be told there's a problem; you go looking for one; -> Fluent English - at least B2+ level; If interested, please apply safely through this portal (application rules are in accordance with GDPR). Employment agency Nr 17138.

🏢 Summary: Fullstack Developer role focused on building and evolving Java-based microservices and modern Angular Single Page Applications within an event-driven architecture. The position emphasizes backend development with Spring Boot, Kafka integration, and secure, scalable solutions, while contributing to CI/CD pipelines and frontend best practices. Work involves close collaboration on solution design, security implementation, and continuous improvement in an Agile environment. 🗂️ Requirements: Strong hands-on experience with Java 17–21, Strong experience with Spring Boot 3.x, Experience with microservices architecture, Experience with Kafka in event-driven or messaging systems, Strong practical experience with SQL and Oracle, Experience or strong understanding of Redis, Experience with Domain Driven Design, Experience with Node.js, Experience with TypeScript, Experience building Single Page Applications with Angular, Strong knowledge of Angular architecture and best practices, Strong understanding of web application security, Practical knowledge of OIDC and OAuth2, Experience with Git, Experience working in Agile methodologies 📃 Skills: Java, Spring, SpringBoot, Microservices, Kafka, SQL, Oracle, Redis, DDD, Node.js, TypeScript, Angular, SPA, Security, OIDC, OAuth2, Git, Agile 🏢 Description: Location: Hybrid work model – 2-3 days per week from the Warsaw office Salary: 160 – 170 PLN net/h (B2B via Experis) Tasks: •    Design, develop, and maintain fullstack applications with a strong emphasis on backend and modern frontend architectures •    Build high-quality, maintainable, secure, scalable, and testable software aligned with business requirements •    Develop and evolve Java-based microservices using Spring Boot •    Contribute to Single Page Applications development ensuring frontend best practices •    Collaborate with business and technical stakeholders to clarify and refine functional and non-functional requirements •    Participate in solution design pre-project studies and technical decision-making •    Integrate systems using event-driven architectures and streaming platforms •    Optimize and maintain existing codebases •    Implement execute and maintain automated tests and CI/CD pipelines •    Ensure application security including identity management and secure authentication flows •    Maintain and update technical documentation •    Participate in internal and external developer communities to share best practices •    Continuously improve skills in modern technologies and software engineering practices Requirements: Backend & Architecture •    Strong hands-on experience with Java 17–21 focusing on modern Java •    Strong experience with Spring Boot 3.x and microservices architectures •    Required experience with Kafka in event-driven or messaging-based systems •    Strong practical experience with SQL using Oracle •    Experience or strong understanding of Redis •    Experience with Domain Driven Design Frontend •    Required experience with Node.js •    Required experience with TypeScript •    Solid experience building Single Page Applications using Angular •    Strong knowledge of Angular best practices architecture and maintainability •    Experience with SPA development •    Webpack knowledge is a nice to have Security •    Strong understanding of web application security •    Practical knowledge of OIDC and OAuth2 protocols •    Experience with identity management platforms as a strong advantage •    Awareness of OWASP principles certifications are a plus DevOps & Tooling •    Required experience with Git •    Experience with CI/CD pipelines GitLab CI and Jenkins as a nice to have •    Maven knowledge as a nice to have •    Docker and Kubernetes knowledge as a nice to have •    Experience with IntelliJ and VS Code •    Knowledge of Jira and Confluence •    Python knowledge as a nice to have •    Practice with AI based code generation tools as a nice to have Methodologies & Ways of Working •    Experience working in Agile methodologies such as Scrum and Kanban •    DevOps mindset and practices •    Ability to collaborate in distributed international teams Offer: •    Multisport card •    Private healthcare •    Access to an e‑learning platform •    Group life insurance

🏢 Summary: Senior QA Automation Lead role focused on designing, implementing, and maintaining automated test frameworks for UI, API, end-to-end, and performance testing within CI/CD pipelines. The position includes leading a small QA team and owning test coverage, reliability, and defect resolution across product areas. B2B contract, office-based in Warsaw, with responsibility for integrating automated testing into the development lifecycle. 🗂️ Requirements: 6+ years QA automation experience, Ownership of test automation codebase, Hands-on experience with Playwright, Cypress or Selenium, Proficiency in JavaScript or TypeScript, Experience with CI/CD-integrated test pipelines, API testing experience, Experience testing RESTful APIs and WebSockets, Experience with Git workflows 📃 Skills: Playwright, Cypress, Selenium, JavaScript, TypeScript, Jenkins, Git, Postman, Supertest, REST, WebSocket, CI/CD 🏢 Description: Employer: International cassino games studio Location: Warsaw (4 days from the office, 1 day remotely) Salary: 5950 - 7600 EUR on B2B Cooperation model: B2B Start date: ASAP Recruitment process: 2 online interviews and recruitment task Technology stack: Playwright or Cypress or Selenium, GIT, Jenkins, Javascript or Typescript Your role is to: -> Own the design, implementation, and maintenance of automated test frameworks covering UI, API, and end-to-end testing; -> Lead a small team of QA engineers, providing hands-on guidance, code reviews, and day-to-day direction; -> Take responsibility for test coverage across assigned product areas, ensuring regressions are caught before they reach production; -> Build and maintain performance test scripts that are reusable, version controlled, and easy to update as the product changes; -> Integrate and maintain automated test suites within CI/CD pipelines, owning the feedback loop for your team; -> Define and enforce testing standards, processes, and documentation within the squad; -> Collaborate with developers and product managers to review requirements and translate them into thorough test plans; -> Own defect triage and test failure analysis, coordinating directly with engineers to drive resolution; -> Continuously improving test reliability, speed, and coverage, proactively flagging risks to engineering leads; Your skills and experiences: -> 6+ years of QA automation experience, with demonstrated ownership of a test automation codebase; -> Solid hands-on experience with frameworks such as Playwright, Cypress, or Selenium; -> Strong proficiency in TypeScript and/or JavaScript for writing and maintaining test scripts; -> Proven experience owning CI/CD-integrated test pipelines (GitHub Actions, Jenkins, or similar); -> Solid API testing experience using tools such as Postman or Supertest; -> Familiarity with RESTful API and WebSocket testing for real-time features; -> Good understanding of Git workflows and agile delivery practices; -> Strong communicators who can represent quality concern clearly to developers and product stakeholders; -> Ownership mentality — takes accountability for test outcomes and drives issues through to resolution; -> Organized and methodical, able to manage workload across multiple features and release cycles; -> Collaborative team lead who enjoys growing junior engineers and raising the quality bar;

🏢 Summary: Frontend Developer (React) role focused on designing and developing a modern greenfield web application using JavaScript/TypeScript and contemporary frontend frameworks. The position involves implementing asynchronous communication with backend services and delivering scalable, production-ready solutions in collaboration with cross-functional teams. Hybrid work model with B2B contract. 🗂️ Requirements: Very good knowledge of JavaScript and/or TypeScript, Commercial experience with modern frontend frameworks (React or Lit), Practical experience with asynchronous communication (AJAX, REST API, WebSockets), Experience in building applications وفق Responsive Web Design (RWD) principles, Ability to write clean, testable, and scalable code 📃 Skills: JavaScript, TypeScript, React, Lit, AJAX, REST, WebSockets, RWD 🏢 Description: Programista Frontend / Programistka Frontend (React) Lokalizacja: hybryda: Warszawa lub Katowice (2x w tygodniu) Wynagrodzenie: B2B: 1000-1100 MD / B2B Zadania: ·       Projektowanie i rozwój nowoczesnej aplikacji webowej w oparciu o JavaScript / TypeScript oraz frameworki takie jak React lub Lit ·       Aktywny udział w tworzeniu aplikacji typu greenfield architektonicznych po wdrożenie produkcyjne ·       Implementacja asynchronicznej komunikacji z backendem. ·       Wsparcie procesu wdrożeniowego w środowisku chmurowym (Google Cloud Platform) ·       Współpraca z zespołami backendowymi, DevOps i UX/UI w celu dostarczania spójnych i skalowalnych rozwiązań ·       Dokumentowanie rozwiązań technicznych i dzielenie się wiedzą w zespole Wymagania: Bardzo dobra znajomość JavaScript i/lub TypeScript Doświadczenie komercyjne w pracy z nowoczesnymi frameworkami frontendowymi, takimi jak: React, Lit Praktyczna znajomość pełnej asynchroniczności: komunikacja AJAX / REST API, praca z WebSockets, obsługa zdarzeń i asynchronicznych przepływów danych Doświadczenie w tworzeniu aplikacji zgodnie z zasadami Responsive Web Design (RWD) (aplikacje dostosowane do różnych rozdzielczości i urządzeń) Umiejętność pisania czystego, testowalnego i skalowalnego kodu Doświadczenie w pracy zespołowej w metodykach zwinnych (Scrum / Agile) Dobra znajomość języka angielskiego Mile widziane: Doświadczenie w realizacji projektów bankowych lub finansowych Znajomość architektury aplikacji działających w chmurze (Google Cloud Platform – GCP)

🏢 Summary: Office-based QA Automation Engineer role focused on building and maintaining automated UI, API, and end-to-end tests for a casino gaming platform. The position involves owning CI/CD test pipelines, ensuring high test coverage, and performing API, WebSocket, and performance testing. The role requires close collaboration with developers and proactive quality ownership in a fast-paced environment. 🗂️ Requirements: 5+ years of QA automation experience, Strong hands-on experience with Playwright or Cypress or Selenium, Strong TypeScript skills, Strong JavaScript skills, Experience building and maintaining CI/CD test pipelines, Experience in API testing including contract testing, Experience in WebSocket testing, Experience with load testing tools (k6 or Gatling or JMeter), Experience with Git, Fluent English (B2+ level) 📃 Skills: TypeScript, JavaScript, Playwright, Cypress, Selenium, WebSocket, k6, Gatling, JMeter, Git, CI/CD 🏢 Description: Employer: International cassino games studio Location: Warsaw (4 days from the office, 1 day remotely) Salary: 5 000 - 6 650 EUR on B2B Cooperation model: B2B Start date: ASAP Recruitment process: 3 online interviews Technology stack: Typescript, Javascript, Cypress or Selenium or Playwright, WebSocket Your role is to: -> Write and maintain automated tests across UI, API, and end-to-end flows; -> Build reliable test pipelines and keep them running cleanly within CI/CD; -> Dig into test failures and get to the root cause — not just mark them as flaky and move on; -> Work with developers to understand how features are built and test them properly; -> Cover API flows thoroughly including chained requests, contracts, and WebSocket behavior; -> Run performance and load tests on critical platform areas and flag what needs fixing; -> Keep test coverage healthy and proactively fill gaps as the product evolves; Your skills and experiences: -> 5+ years of QA automation experience with real, hands-on work to show for it; -> Strong with Playwright, Cypress, or Selenium — you've built with them, not just maintained them; -> Solid TypeScript and JavaScript skills, writing code that's clean and easy to maintain; -> Comfortable owning CI/CD test pipelines end to end; -> Good API testing experience including contract and WebSocket testing; -> Familiar with load testing tools like k6, Gatling, or JMeter; -> Fluent with Git and working within agile teams; -> You work independently and take ownership of your output; -> You care about quality and it shows in your work; -> You communicate clearly and flag issues before they become problems; -> You're collaborative — you work well with developers and product alike; -> Fluent English - at least B2+ level;

🏢 Summary: Senior JavaScript React Developer role focused on building and maintaining high-performance frontend solutions for large-scale, multi-country eCommerce platforms. The position involves developing modern applications with React.js and Next.js, contributing to a multisite Drupal transition, and driving best practices across the full development lifecycle. The role requires close collaboration with cross-functional and international teams in a hybrid work setup. 🗂️ Requirements: Strong experience with React.js and Next.js (SSG/SSR, i18n, performance optimization), Proficiency in JavaScript and TypeScript, Strong knowledge of HTML5, CSS/SCSS, Tailwind, Experience with REST and GraphQL APIs, Experience with Git and CI/CD pipelines, Knowledge of Docker and Kubernetes, Experience with cloud platforms (AWS or Azure or GCP), Understanding of headless or decoupled architecture, Experience with performance optimization and scalable frontend architecture, Knowledge of WCAG accessibility standards, Experience working in Agile/Scrum environment, English level B2 or higher 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML5, SCSS, Tailwind, REST, GraphQL, Git, Jira, Figma, Confluence, Docker, Kubernetes, GitLab, AWS, Azure, GCP, Drupal, jQuery, CI/CD, WCAG, Scrum, AJAX 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. For our client, we are looking for a Senior JavaScript React Developer to join our client's Website & eCommerce team. In this role, you will be responsible for building and maintaining modern, high-performance frontend solutions using React.js and Next.js. You will collaborate closely with designers, backend developers, and international stakeholders while driving best practices across the development lifecycle. You will play a key role in the evolution of large-scale, multi-country digital platforms and contribute to the transition toward a new multisite Drupal platform planned for 2026. Project information: Location: Warsaw, Poland Work Setup: Hybrid work (2 - 3 days/ week in the office) Rate: 125 PLN/net/h + VAT (B2B contract) Language: English (B2+ Required) Start date: depending on candidate availability Project scope: Develop and maintain frontend components using React.js and Next.js (SSG/SSR, i18n, performance optimization) Build and support custom CMS modules, plugins, and integrations Contribute to all phases of the software development lifecycle: design, development, testing, deployment, and maintenance Drive and promote best practices, including test-driven development, CI/CD, SCRUM, refactoring, and code standards Collaborate closely with UX/UI designers and frontend/backend developers to deliver intuitive and visually appealing user experiences Ensure website content is easily editable by non-technical users Optimize applications for performance, scalability, and accessibility (WCAG) Work with distributed international teams and key stakeholders Stay up to date with emerging frontend technologies and industry trends Requirements: Technical Skills: Frontend: Strong skills in React.js and Next.js (SSG/SSR, i18n, performance optimization). Languages: JavaScript/TypeScript, HTML5, SCSS/Tailwind. APIs: REST, GraphQL. Tooling: Jira, Git, Figma, Confluence. Architecture (Preferred): Headless, Decoupled, Micro Frontends, Component-based design. Cloud & DevOps: Docker, Kubernetes, GitLab CI/CD, AWS/Azure/GCP. Competences: Strong front-end skills: HTML, CSS, JavaScript, jQuery, plus modern frameworks (React, Next.js). Understanding of the entire web development process (design, development, deployment). Good understanding of asynchronous request handling, partial page updates, and AJAX. Proficient in cross-browser compatibility and scalable application design principles. Experience with data migration, transformation, and scripting. Familiarity with Agile and Scrum methodologies. Prior experience with digital accessibility (WCAG) We offer: Full-time job agreement based on B2B Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 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 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: Long-term B2B opportunity for a senior engineer to deliver production-ready code and shape system architecture in a microservices environment. The role combines hands-on Java and React development with architectural responsibilities in a global, collaborative setup. It focuses on high-frequency delivery and technical excellence within the financial sector. 🗂️ Requirements: Strong Java experience (latest versions), Strong React experience, Experience with microservices architecture, Experience delivering RESTful APIs, Experience with PostgreSQL, Proven high-frequency code delivery, Experience in banking or financial sector 📃 Skills: Java, React, Microservices, REST, PostgreSQL, Banking, Docker, Kubernetes 🏢 Description: Working mode : Hybrid - 6 days per month at the Warsaw office Contract type : B2B, long term cooperation Rate : 200 PLN/h Summary: This role focuses on hands-on development and system architecture, driving engineering culture, and enhancing business growth through technical expertise in a collaborative, global environment. Main Responsibilities: Deliver code to production and support system architecture aligned to microservices Understand business, engineering, and non-functional requirements Drive the desired engineering culture across teams Collaborate with a globally diverse team across regions Proactively remove impediments, assess risks, and communicate issues to program management Identify and eliminate process inefficiencies Key Requirements: Strong Java and React programming experience Experience in microservice architecture Background in the financial sector, particularly banking Proven capability of delivering code changes at high frequency Experience with RESTful API delivery Familiarity with PostgreSQL databases Recent Java experience, preferably with the latest versions Experience with ReactJS for UI application development Nice to Have: Knowledge of containers and orchestration technologies like Docker and Kubernetes. Other Details: This position offers the opportunity to work within a multi-regional team on innovative projects. Ideal for candidates seeking to leverage their development skills in a dynamic and evolving business context.