Frontend Developer with React (f/m/x)

🏢 Summary: Frontend Developer role focused on building scalable, high-performance, and user-centric web applications for global travel platforms. The position involves developing new features, maintaining existing applications, and collaborating closely with designers and backend teams to deliver intuitive user experiences. You will contribute to frontend architecture, code quality, and continuous improvement in an Agile environment. 🗂️ Requirements: Minimum 3 years commercial experience as Frontend Developer, Strong knowledge of JavaScript, Professional experience with React, Professional experience with TypeScript, Experience with Vue.js, Experience with CMS platforms (non-WordPress), Experience with testing frameworks (unit, integration, end-to-end), Understanding of CI/CD processes, Ability to write clean, testable, maintainable code, Very good command of English 📃 Skills: JavaScript, TypeScript, React, Vue, CMS, ReactHookForm, Webpack, Babel, Vite, Rspack, CI/CD, Next.js, Node.js, AWS 🏢 Description: We are looking for a Frontend Developer to join our team and help build modern, scalable, and user-centric digital products that support our global travel platforms. In this role, you will work closely with designers, backend developers, Product Owners, and business stakeholders to deliver intuitive and high-performing user experiences used by customers around the world. You will have a direct impact on the quality, usability, and evolution of our products. Your responsibilities Develop new user-facing features and maintain existing applications Write clean, maintainable, and efficient code following best practices Ensure high performance, scalability, and responsiveness across web applications Validate and process user input before sending data to backend services Collaborate with designers, developers, and business stakeholders to translate requirements into technical solutions Bridge the gap between design and technical implementation Ensure consistency, usability, accessibility, and responsiveness across digital products Contribute to the continuous improvement of frontend architecture, standards, and development practices Participate in code reviews and knowledge-sharing initiatives Troubleshoot, debug, and resolve application issues Our requirements Minimum 3 years of commercial experience as a Frontend Developer Strong knowledge of JavaScript and modern frontend development practices Professional experience with React and TypeScript Experience working with Vue.js Experience with CMS platforms (other than WordPress) Familiarity with tools such as React Hook Form, Webpack, Babel, Vite, or Rspack Experience with testing frameworks and different testing approaches (unit, integration, end-to-end) Understanding of CI/CD processes and development workflows Ability to write clean, testable, and maintainable code Strong problem-solving skills and attention to detail Good communication skills and very good command of English Nice to have Experience with Next.js Knowledge of Node.js Knowledge of AWS services and cloud-based solutions How we work Clean Code principles Design patterns and software engineering best practices Code reviews and knowledge sharing Static code analysis Continuous Integration and Continuous Deployment (CI/CD) Agile and collaborative development environment What we offer Hybrid work model (1–2 days per week in our Katowice office) Opportunity to work on international, large-scale projects used by customers worldwide Attractive remuneration paid in EUR Flexible working hours Individual learning and development budget Partially or fully funded training and certifications English lessons Mentoring and support from experienced technical leaders Participation in conferences in Poland and abroad A culture focused on collaboration, knowledge sharing, and continuous improvement Space to innovate and bring your own ideas to life Support for IT community initiatives and professional networking Long-term cooperation in a stable, growing international organization

🏢 Summary: Senior Front-end Developer role focused on designing and implementing complex user interfaces and single-page applications using modern frontend technologies. The position involves architecting scalable frontend solutions, optimizing performance, and integrating APIs in collaboration with backend and product teams. Hybrid work model with B2B contract in the banking sector. 🗂️ Requirements: Proficiency in HTML, Proficiency in CSS, Proficiency in JavaScript, Proficiency in TypeScript, Experience with Web Components, Experience with Lit, Strong knowledge of Node.js, Experience with npm, Familiarity with Vitest, Experience building single-page applications, Experience integrating REST APIs, Ability to optimize frontend performance 📃 Skills: HTML, CSS, JavaScript, TypeScript, WebComponents, Lit, Nodejs, npm, Vitest 🏢 Description: Industry: Banking Work model: Hybrid in Warsaw, Łódź or Tricity - 3 days a week in the office Rate: up to 150 PLN/h (B2B contract) Introduction & Summary We are seeking a highly skilled Senior Front-end Developer proficient in modern frontend technologies to design and implement complex user interfaces. The ideal candidate should possess extensive experience with HTML, CSS, JavaScript, and TypeScript , alongside capabilities in Web Components. Exceptional collaboration skills are essential as the role involves working closely with various teams to enhance product offerings. Main Responsibilities Architect and implement interactive user interfaces and single-page applications. Establish best practices for application architecture and component reusability. Audit and enhance frontend performance and load times. Collaborate with backend engineers and product teams to integrate APIs. Ensure optimal user experiences across multiple devices. Key Requirements Proficiency in HTML, CSS, JavaScript, TypeScript . Experience with Web Components / Lit . Strong background in Node.js / npm . Familiarity with Vitest . Nice to Have Knowledge of CICD . Experience with Kafka . Familiarity with NinjaFork . Understanding of MQ .

🏢 Summary: Senior Frontend React Developer role focused on building and optimizing advanced UI applications with generative AI features in an enterprise environment. The position involves collaborating with cross-functional teams to deliver high-quality, user-centric solutions and integrating CI/CD and AI operational workflows. Hybrid work model based in Warsaw. 🗂️ Requirements: 4+ years of experience in React development, 4+ years of experience in JavaScript development, Strong knowledge of DevOps practices, Hands-on experience with Jira, Hands-on experience with GitLab, Hands-on experience with OpenShift, Proficiency in Linux, Experience with unit testing, Experience with system testing, Fluent Polish, Fluent English, Legal right to work in Europe 📃 Skills: React, JavaScript, DevOps, Jira, GitLab, OpenShift, Linux, CI/CD, Agile, Scrum, AI, Testing 🏢 Description: Empower innovation at the forefront of UI and AI technology — craft impactful user experiences that shape the future! Warszawa-based opportunity with hybrid work model (up to 2 remote days per week). As a Senior Frontend React Developer , you will be working for our client, a leader in enterprise software solutions, focusing on delivering cutting-edge UI and generative AI services. Join a collaborative, agile team committed to creating high-quality, user-centric applications that drive digital transformation and innovation. Your main responsibilities: Develop and optimize complex frontend applications using React and JavaScript, ensuring seamless user experiences Collaborate with cross-functional teams including data scientists and DevOps to deliver innovative UI solutions, including generative AI features Confirm technical designs, troubleshoot issues, and implement best practices for code quality and performance Contribute to the integration of CI/CD pipelines and operational workflows involving AI services Participate actively in Agile/Scrum ceremonies, promoting effective teamwork and continuous improvement You're ideal for this role if you have: 4+ years of proven experience in React and JavaScript development Strong understanding of DevOps practices with hands-on experience using Jira, GitLab, and OpenShift Proficiency in Linux OS and performing unit and system testing Excellent command of English, both written and spoken Ability to independently deliver high-quality code and confirm technical designs It is a strong plus if you have: (optional) Experience working with financial data, including Market Data and Reference Data Full-stack development expertise Knowledge of CI/CD pipelines and generative AI operational workflows Language Required for the role: Fluent in Polish and English Eligibility for the role: Only candidates with an existing legal right to work in Europe 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: Frontend Developer role focused on building and maintaining front-end applications that consume REST APIs in a hybrid work model. The position involves coding in line with application requirements, debugging, and enhancing existing solutions while collaborating within a development team. The role requires strong technical expertise in Angular and related technologies, along with effective communication in an international environment. 🗂️ Requirements: Experience with Angular Framework, Strong knowledge of TypeScript, Strong knowledge of JavaScript, Ability to consume and render data via REST APIs, Expertise in Hadoop, Expertise in MapReduce, Ability to reuse existing code in new applications, Fluent English 📃 Skills: Angular, TypeScript, JavaScript, REST, Hadoop, MapReduce, APIs 🏢 Description: General info: Model of work: hybrid (2-3 times per week work from office in Łódź) Type of contract: B2B contract Rate: 80 - 100 PLN net + vat/h Overview We are seeking a skilled Frontend Developer to design, create, and maintain front-end applications that effectively consume REST APIs. The ideal candidate must demonstrate strong communication skills and the ability to explain complex technical topics to non-technical audiences. This role involves ensuring that application code meets all requirements, along with debugging and enhancing application procedures. Main Responsibilities: Designing, creating, and maintaining front-end applications to consume REST APIs. Writing code in accordance with application requirements. Collaborating as part of a software development team to meet standards. Explaining complex technical concepts in clear language. Debugging applications to ensure functionality. Making suggestions for application enhancements and infrastructure improvements. Contributing to a positive work environment through effective teamwork. Key Requirements: Excellent communication skills to build trust with team members and stakeholders. Experience with Angular Framework. Strong knowledge of TypeScript and JavaScript. Ability to consume and render data via APIs. Capability to reuse existing code in new applications. Expertise in Hadoop and MapReduce. Fluent English is a must (daily communication in international environment) Nice to Have: Experience in similar financial institutions or environments. Knowledge of additional programming languages or frameworks. Understanding of DevOps practices.

🏢 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: The offer is for an experienced Frontend Developer to build and optimize modern web applications using React.js and TypeScript in an Agile, international environment. The role focuses on developing new features, improving performance, resolving production issues, and delivering stable, scalable solutions. You will collaborate with cross-functional teams and contribute to continuous technical improvements. 🗂️ Requirements: Strong commercial experience in frontend development, Expert knowledge of React.js, Expert knowledge of TypeScript, Solid understanding of JavaScript fundamentals, Experience with E2E testing frameworks, Experience with CI/CD pipelines, Experience with version control systems, Proven debugging and performance optimization skills, Ability to work in distributed environment, Fluent English B2+/C1 📃 Skills: React, TypeScript, JavaScript, Cypress, Playwright, CI/CD, Git, HTML, CSS, Agile 🏢 Description: We are looking for an experienced Frontend Developer to join our international team. In this role, you will develop and optimize modern web applications, contribute to technical improvements, and help deliver stable, high-performance solutions in a collaborative Agile environment. Your responsibilities: Develop and maintain modern web applications using React.js and TypeScript Build new features and improve existing functionalities for the platform Optimize application performance and troubleshoot technical issues Debug and resolve production incidents to ensure platform stability Participate in technical discussions, code reviews, and continuous improvement initiatives Collaborate closely with cross-functional teams, including Product, Design, QA, and mobile development teams Work with our JavaScript/TypeScript-based UI framework designed for TV-box environments Ensure delivery of stable, scalable, and high-quality code following best engineering practices We are looking for you, if you have: Strong commercial experience in frontend development Expert-level knowledge of React.js Expert-level knowledge of TypeScript Solid understanding of JavaScript fundamentals Experience with E2E testing frameworks such as Cypress, Playwright, or similar Experience working with CI/CD pipelines and version control systems Proven experience in debugging, troubleshooting, and performance optimization Ability to work independently in a distributed environment Fluent English (minimum B2+/C1 level) Nice to have: Experience developing applications for Smart TV platforms Experience working on streaming, video, media, or entertainment-related products We offer: Participation in interesting and demanding projects. Flexible working hours. A great, non-corporate atmosphere. Possibility to work remote or hybrid (2 days per week from the office). Opportunities for development and promotion. Attractive package of benefits. We reserve the right to contact the selected candidates.

🏢 Summary: Frontend Developer role focused on building and evolving a large-scale, high-performance administrative web platform using React. The position emphasizes scalable architecture, code quality, automated testing, and integration with backend services. You will contribute to architectural decisions and maintain robust, maintainable frontend solutions in an enterprise environment. 🗂️ Requirements: 5+ years frontend development experience, Strong commercial experience with React, Expert knowledge of modern JavaScript (ES2024+), Advanced TypeScript proficiency, Experience integrating REST APIs, Hands-on experience with Webpack and Babel, Proficient with npm or yarn, Strong Git experience, Experience designing scalable frontend architectures, Experience with automated testing (unit, component, E2E) using Jest, React Testing Library, Cypress 📃 Skills: React, JavaScript, TypeScript, REST, Webpack, Babel, npm, yarn, Git, Jest, Cypress, GraphQL 🏢 Description: We are looking for an experienced Frontend Developer passionate about building scalable, high-performance user interfaces. In this role, you will contribute to the development and evolution of a large-scale administrative web platform, ensuring high code quality, maintainability, and performance. Key Requirements 5+ years of experience in frontend development, preferably in complex or enterprise-scale environments Strong commercial experience with React (state management, hooks, component lifecycle, application architecture) Expert knowledge of modern JavaScript (ES2024+) , including asynchronous programming and modular architecture Solid hands-on experience with TypeScript (advanced typing, generics, large-scale React integration) Experience integrating frontend applications with REST APIs (HTTP methods, authentication, data handling) Practical knowledge of build tools such as Webpack, Babel, npm/yarn Strong experience with Git (branching strategies, code reviews, conflict resolution) Experience designing and implementing scalable and high-performance frontend architectures Ability to write automated tests using Jest, React Testing Library, and Cypress Nice to Have Experience working with GraphQL in React-based applications Understanding and practical use of software design patterns Responsibilities Develop and enhance a complex React-based administrative platform Contribute to frontend architecture decisions and scalability improvements Maintain high standards of code quality (Clean Code, SOLID principles) Write and maintain unit, component, and end-to-end tests Collaborate with cross-functional teams in an agile delivery environment

🏢 Summary: Opportunity for a Senior Front-End Developer to modernize and scale an existing web interface using React and Next.js. The role focuses on building high-quality, responsive UI components, integrating with backend services, and driving front-end architecture and best practices. You will collaborate with backend and data teams while ensuring performance, scalability, and code quality. 🗂️ Requirements: Minimum 5 years of hands-on experience with React and Next.js, Strong proficiency in JavaScript and TypeScript, Strong knowledge of HTML and CSS, Experience with RESTful APIs integration, Understanding of modern front-end architecture and design patterns, Experience with front-end testing frameworks, Experience with build tools, Ability to troubleshoot and resolve UI and performance issues 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML, CSS, REST, gRPC-Web, CI/CD, Testing 🏢 Description: Senior Front-End Developer (React / Next.js) We are looking for a Front-End Developer to join a technology-focused team working on modern web applications. This role will play a key part in transforming an existing user interface into a modern, scalable front-end built with React and Next.js. You will be responsible for delivering responsive, high-quality user interfaces and contributing to the long-term evolution of the UI platform. The position involves close collaboration with backend and data teams, as well as ownership of front-end standards and best practices within the team. Responsibilities Redesign and modernize an existing web interface using React and Next.js Build reusable, maintainable UI components with TypeScript Act as a front-end subject matter expert, supporting ongoing improvements to usability and performance Integrate front-end applications with backend services via REST APIs (gRPC-Web knowledge is a plus) Identify, troubleshoot, and resolve UI and performance issues Contribute to code reviews, technical discussions, and CI/CD processes Ensure high code quality through testing, documentation, and adherence to best practices Required Skills & Experience Min. 5 years of hands-on experience with React and Next.js Strong proficiency in JavaScript/TypeScript, HTML, and CSS Solid understanding of modern front-end architecture and development patterns Experience working with RESTful APIs Familiarity with front-end testing frameworks and build tools is an advantage Experience in finances/banking - nice to have

🏢 Summary: Senior Frontend Developer role focused on building and optimizing high-performance, scalable user interfaces for high-frequency trading platforms in a hybrid Warszawa-based model. The position involves developing React-based solutions, enhancing trading infrastructure, and ensuring low-latency performance in financial systems. You will contribute to modern frontend workflows and collaborate on delivering robust, scalable digital trading solutions. 🗂️ Requirements: Minimum 4 years commercial frontend development experience, Strong proficiency in React JS, Strong proficiency in JavaScript, Strong proficiency in modern CSS, Experience with Jest testing framework, Experience with CI/CD processes, Working knowledge of GitLab, Understanding of design patterns, Understanding of programming best practices, Fluent English, Legal right to work in the European Union 📃 Skills: React, JavaScript, CSS, SCSS, Jest, GitLab, CI/CD, npm, Java, Python, Ag-Grid 🏢 Description: Empower scalable UI innovation — shape the future of high-frequency trading platforms! Location & Work Model Warszawa-based opportunity with hybrid work model. As a Senior Frontend Developer, you will be working for our client, a leader in systematic trading strategies within the financial industry. You will contribute to building and optimizing critical trading infrastructure across derivatives, FX, commodities, rates, and single stocks, helping to drive performance and scalability in digital trading solutions. Join us and be at the forefront of innovation and growth in financial technology. Your main responsibilities: Develop and optimize high-performance, scalable user interfaces using React JS (Hooks / Context API). Implement modern CSS techniques (CSS-in-JS / SCSS) to enhance user experiences. Collaborate with cross-functional teams to deliver seamless frontend solutions. Write robust unit tests with Jest and contribute to code quality standards. Contribute to modern frontend workflows, including npm, CI/CD pipelines (GitLab). Support backend integration using Java or Python (exposure welcome). Participate actively in UI design discussions to align with UX principles. Maintain and improve existing systems, ensuring low latency and high-volume trading efficiency. You're ideal for this role if you have: Minimum 4 years of commercial frontend development experience. Strong proficiency in React JS, JavaScript, and modern CSS. Sound understanding of design patterns and best programming practices. Experience with Jest testing framework. Working knowledge of CI/CD processes and tools (GitLab). Basic backend knowledge in Java or Python is a plus. It is a strong plus if you have: (optional) Experience with Ag-Grid library. Knowledge of good UX principles. Certifications or additional training in frontend technologies. Language Required for the role: Fluent 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 optimizing high-performance, scalable user interfaces for high-frequency trading platforms in a hybrid model in Warsaw. The position involves developing React-based solutions, enhancing UI performance, and supporting integration with backend systems in a low-latency trading environment. 🗂️ Requirements: Minimum 4 years commercial frontend development experience, Strong proficiency in React JS, Strong proficiency in JavaScript, Strong proficiency in modern CSS, Experience with Jest testing framework, Experience with CI/CD tools (GitLab), Understanding of design patterns and best programming practices, Fluent English, Legal right to work in the EU 📃 Skills: React, JavaScript, CSS, SCSS, Jest, GitLab, CI/CD, npm, Java, Python, Ag-Grid 🏢 Description: Empower scalable UI innovation — shape the future of high-frequency trading platforms! Location & Work Model Warszawa-based opportunity with hybrid work model. As a Senior Frontend Developer, you will be working for our client, a leader in systematic trading strategies within the financial industry. You will contribute to building and optimizing critical trading infrastructure across derivatives, FX, commodities, rates, and single stocks, helping to drive performance and scalability in digital trading solutions. Join us and be at the forefront of innovation and growth in financial technology. Your main responsibilities: Develop and optimize high-performance, scalable user interfaces using React JS (Hooks / Context API). Implement modern CSS techniques (CSS-in-JS / SCSS) to enhance user experiences. Collaborate with cross-functional teams to deliver seamless frontend solutions. Write robust unit tests with Jest and contribute to code quality standards. Contribute to modern frontend workflows, including npm, CI/CD pipelines (GitLab). Support backend integration using Java or Python (exposure welcome). Participate actively in UI design discussions to align with UX principles. Maintain and improve existing systems, ensuring low latency and high-volume trading efficiency. You're ideal for this role if you have: Minimum 4 years of commercial frontend development experience. Strong proficiency in React JS, JavaScript, and modern CSS. Sound understanding of design patterns and best programming practices. Experience with Jest testing framework. Working knowledge of CI/CD processes and tools (GitLab). Basic backend knowledge in Java or Python is a plus. It is a strong plus if you have: (optional) Experience with Ag-Grid library. Knowledge of good UX principles. Certifications or additional training in frontend technologies. Language Required for the role: Fluent 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.