Senior ReactJS Developer

🏢 Summary: Offer for an experienced React Developer to design and deliver modern, scalable frontend solutions in agile, client‑facing consulting projects. The role involves building high‑quality web applications, shaping frontend architecture, and collaborating with cross‑functional teams. Ideal for a senior frontend professional with strong React expertise and full lifecycle ownership. 🗂️ Requirements: 6+ years of software development experience, Strong hands-on experience with React.js, Excellent knowledge of JavaScript, Excellent knowledge of TypeScript, Experience building complex component-based frontend applications, Understanding of modern frontend development practices, Experience integrating REST APIs, Experience working in Agile (Scrum/Kanban) environments, Ability to translate business requirements into technical solutions 📃 Skills: React, JavaScript, TypeScript, REST, Scrum, Kanban, HTML, CSS 🏢 Description: CAPCO POLAND *We are looking for Poland based candidate. About Capco Capco is a global management and technology consultancy specialising in the financial services and energy industries. We help our clients succeed by combining deep domain expertise with innovative technology solutions. At Capco, you’ll join a collaborative and inclusive culture where your individuality is valued, your ideas are heard, and your career development is actively supported. The Role As a React Developer , you will play a hands‑on role in designing and delivering modern, scalable frontend solutions for leading clients. Working in cross‑functional agile teams, you’ll contribute to high‑impact projects, influence frontend best practices, and help shape user‑centric digital experiences in a consulting environment. This role is ideal for an experienced frontend professional who enjoys combining strong technical skills with close collaboration across teams and stakeholders. What You’ll Do Design, develop, and maintain high‑quality web applications using React.js Build scalable, reusable components using JavaScript and TypeScript Take ownership of frontend solutions across the full development lifecycle Collaborate closely with UX/UI designers, backend developers, and product owners Translate business requirements into robust technical solutions Contribute to frontend architecture decisions and development standards Conduct code reviews and support the growth of other developers Deliver client‑facing solutions in agile delivery teams What We’re Looking For 6+ years of experience as a Software Developer Strong, hands‑on experience with React.js Excellent knowledge of JavaScript and TypeScript Proven experience building complex, component‑based frontend applications Solid understanding of modern frontend development practices and REST APIs Experience working in agile environments (Scrum / Kanban) Strong communication skills and a collaborative mindset Ability to work effectively in a client‑focused consulting environment Why Join Capco? Opportunity to work on innovative, high‑impact projects for top‑tier clients Clear career progression and continuous learning opportunities Inclusive, diverse, and collaborative culture Hybrid working model offering flexibility Competitive compensation and benefits package Strong local presence within a global consultancy We offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects. ONLINE RECRUITMENT PROCESS STEPS Screening call with Recruiter Technical Interview Client Interview Feedback/Offer We have been informed of several recruitment scams targeting the public. We strongly advise you to verify identities before engaging in recruitment related communication. All official Capco communication will be conducted via a Capco recruiter.

🏢 Summary: Hybrid React Team Lead role focused on leading the development of scalable web applications and managing a frontend team in a dynamic, product-oriented environment. The position combines hands-on React development with architectural decisions, state management design, and close collaboration with cross-functional teams. It requires strong expertise in modern frontend technologies, testing practices, and performance optimization. 🗂️ Requirements: 5+ years experience with JavaScript/TypeScript, 3+ years experience with React.js, Strong knowledge of React Hooks, Strong knowledge of Context API, Strong knowledge of Redux (Redux Toolkit preferred), Experience with frontend design patterns, Experience with clean code principles, Experience with RESTful APIs or GraphQL, Good knowledge of HTML5, Good knowledge of CSS3/SCSS, Experience with responsive design, Experience with component libraries and design systems, Familiarity with Webpack or Vite, Experience leading or mentoring developers 📃 Skills: JavaScript, TypeScript, React, Redux, ReduxToolkit, Hooks, ContextAPI, HTML5, CSS3, SCSS, REST, GraphQL, Webpack, Vite, Jest, ReactTestingLibrary, Storybook, MaterialUI, Tailwind, Next.js, Lighthouse, ChromeDevTools, WCAG 🏢 Description: Please note: This is a hybrid role – 3 days per week from the office in Warsaw. Overview We are a leader in AI-powered enterprise operations. We deliver digital solutions and consulting services that help companies grow and improve their performance. We use advanced technology to simplify processes, increase efficiency, and create new business opportunities, especially in private capital markets. Our ecosystem includes: PaaS (Platform as a Service) – an AI-based platform that improves workflows, provides useful insights, and supports value creation across portfolios. SaaS (Software as a Service) – a cloud platform that offers strong performance, smart tools, and scalable solutions. S&C (Solutions and Consulting Suite) – modular technology solutions that help manage, grow, and improve company performance. With more than 10 years of experience working with fast-growing companies and private equity-backed businesses, we combine strong industry knowledge with technology expertise to create real business value. The Opportunity We are looking for an experienced and motivated React Team Lead to lead the development of modern and scalable web applications. You will manage a team of React developers, support good frontend architecture practices, and make sure we deliver fast and high-quality user interfaces. The ideal candidate has strong experience with React (including Hooks and Context API), Redux, and frontend design patterns. You should feel comfortable working in a dynamic and team-oriented environment. Responsibilities Lead, mentor, and support a team of React developers through code reviews, 1:1 meetings, and practical guidance. Work closely with product managers, designers, and backend engineers to plan and prioritize features. Manage sprint planning, task estimation, and delivery timelines for the frontend team. Design and build complex user interfaces using React, Hooks, and Context API. Develop and maintain scalable state management solutions using Redux Toolkit. Apply modern frontend design patterns (such as container/presenter, compound components, render props, and HOCs). Build reusable component libraries and ensure alignment with the design system. Improve application performance, accessibility, and cross-browser compatibility. Promote best practices in code quality, testing, CI/CD, and documentation. Maintain strong unit and integration test coverage (e.g., with Jest and React Testing Library). Support frontend architecture decisions and evaluate new tools when needed. Requirements 5+ years of experience with JavaScript/TypeScript, including 3+ years with React.js Strong knowledge of React Hooks, Context API, and Redux (Redux Toolkit preferred) Experience with frontend design patterns and clean code principles Experience working with RESTful APIs or GraphQL Good knowledge of HTML5, CSS3/SCSS, and responsive design Experience with component libraries and design systems (e.g., Storybook, Material UI, Tailwind) Familiarity with build tools such as Webpack or Vite Experience leading or mentoring developers Nice to Have Experience with performance tools (e.g., Lighthouse, Chrome DevTools) Experience with SSR/SSG frameworks like Next.js Knowledge of accessibility standards (WCAG) Contributions to open-source frontend projects Why Join Us? We are looking for creative people who solve problems, learn quickly, and enjoy working in an open and diverse environment. We work hard, support each other, and also make time to enjoy what we do.

🏢 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: 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: Software Engineer role focused on end-to-end development of B2B and B2C SaaS platforms in the cybersecurity domain. The position involves building secure, scalable frontend and backend solutions using React, TypeScript, NestJS, and Node.js. You will contribute to API development, UI implementation, testing, and code quality within an agile environment. 🗂️ Requirements: Based in Poland, 2+ years of software engineering experience, Experience with JavaScript and TypeScript, Experience with HTML5 and CSS3, Experience with React, Experience with NestJS and Node.js, Experience building REST APIs, Familiarity with Git, Ability to write unit tests, Experience with testing frameworks, Understanding of Agile methodology, Strong computer science fundamentals, Good written and spoken English 📃 Skills: JavaScript, TypeScript, HTML5, CSS3, React, NestJS, Node.js, REST, Git, Mocha, Jest, Agile, AzureDevOps, Slack 🏢 Description: CAPCO POLAND *We are looking for Poland based candidate. Capco is a fully independent, global management and technology consultancy. For 25 years we have combined innovative thinking with deep industry knowledge to deliver business consulting, digital transformation and technology services to Finance and Energy markets. Our collaborative and efficient approach helps clients reduce costs and manage risk and regulatory change while increasing revenues. We are thinkers, innovators, and disruptors. We are small enough to care but large enough to matter. Role Overview As a Software Engineer you will be involved in end-to-end development for our B2B and B2C SaaS platforms. You’ll work with React and TypeScript on the frontend, alongside NestJS and Node.js on the backend, partnering closely with senior engineers and the Technical Lead Engineer. Your focus will be on delivering secure, scalable, and user-focused solutions. This role offers strong opportunities for professional growth while contributing to products that protect millions of small businesses and consumers in the cybersecurity space. How you will get the job done Write high quality, maintainable, and well-tested code. Implement front-end UI components using TypeScript and React. Implement RESTful API endpoints using TypeScript, NestJS, and Node.js. Participate in peer code reviews to maintain code quality and follow engineering best practices. Collaborate with developers to build reusable code and components. Follow software security requirements and secure coding practices. Leverage modern developer tools (including AI-assisted tools) to enhance productivity. Skills and experience you will need 2+ years of experience in software engineering. Experience writing code in JavaScript/TypeScript, HTML5, CSS3. Experience with front-end technologies and frameworks, preferably React. Experience with NestJS, Node.js, and API development. Strong computer science fundamentals and problem-solving/analytical skills. Familiarity with version control systems (e.g., Git). Understanding of agile software development lifecycle. Ability to write unit tests. Experience with testing frameworks such as Mocha, Jest, etc. Strong communication skills — able to explain technical decisions clearly. Good written and spoken English proficiency is required; this role involves regular communication with US-based stakeholders via Slack, Azure DevOps, and video calls. We offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects. ONLINE RECRUITMENT PROCESS STEPS Screening call with Recruiter Technical Interview Client Interview Feedback/Offer We have been informed of several recruitment scams targeting the public. We strongly advise you to verify identities before engaging in recruitment related communication. All official Capco communication will be conducted via a Capco recruiter.

🏢 Summary: Senior Software Engineer role focused on full-stack development of secure and scalable B2B and B2C SaaS products using React/TypeScript and NestJS/Node.js. The position involves building frontend and backend components, designing RESTful APIs, and implementing security best practices in a cybersecurity-focused environment. The role requires collaboration in an agile setup and contribution to microservices-based architectures. 🗂️ Requirements: 5+ years of software engineering experience, Proficiency in JavaScript and TypeScript, Experience with React, Experience with NestJS and Node.js, Experience in designing and developing RESTful APIs, Experience with microservices architecture, Knowledge of application, network, and cloud security, Experience with HTML5 and CSS3, Familiarity with Git, Understanding of Agile and DevOps principles, Good written and spoken English 📃 Skills: JavaScript, TypeScript, React, NestJS, Node.js, HTML5, CSS3, REST, Microservices, Git, Agile, DevOps, Security, Cloud, API 🏢 Description: CAPCO POLAND *We are looking for Poland based candidate. Capco is a fully independent, global management and technology consultancy. For 25 years we have combined innovative thinking with deep industry knowledge to deliver business consulting, digital transformation and technology services to Finance and Energy markets. Our collaborative and efficient approach helps clients reduce costs and manage risk and regulatory change while increasing revenues. We are thinkers, innovators, and disruptors. We are small enough to care but large enough to matter. Role Overview As a Senior Software Engineer, you will serve as a senior full-stack developer for our B2B and B2C SaaS products, with a focus on building secure, scalable, and customer-centric platforms. You’ll be hands-on with frontend and backend development across our React/TypeScript and NestJS/Node.js stack. This is a great opportunity to shape innovative applications that secure millions of small businesses and consumers while deepening your expertise in cybersecurity — a rapidly growing and impactful domain. How you will get the job done Write and deliver clean, maintainable, and well-tested code. Implement front-end UI components using TypeScript and React Framework. Implement RESTful API endpoints using TypeScript, NestJS, and Node.js. Participate in peer code reviews to maintain code quality and adhere to engineering best practices. Collaborate with developers to build reusable code and libraries for future use. Implement software security requirements. Leverage new and cutting-edge developer tools to enhance productivity and code quality. Integrate APIs and services to deliver intelligent product features where applicable. Skills and experience you will need • 5+ years of experience in software engineering. • Experience writing code in JavaScript/TypeScript, HTML5, CSS3, or related applications. • Experience with front-end technologies and frameworks, preferably React. • API design and development experience using NestJS and Node.js. • Experience with application, network, and cloud security. • Experience with building and architecting microservices. • Strong computer science fundamentals and problem-solving/analytical skills. • Familiarity with version control systems (e.g., Git). • Understanding of agile software development lifecycle and DevOps principles. • Strong verbal and written communication skills, including the ability to communicate and explain technical decisions. • Good written and spoken English proficiency is required; this role involves regular communication with US-based stakeholders via Slack, Azure DevOps, and video calls. We offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects. ONLINE RECRUITMENT PROCESS STEPS Screening call with Recruiter Technical Interview Client Interview Feedback/Offer We have been informed of several recruitment scams targeting the public. We strongly advise you to verify identities before engaging in recruitment related communication. All official Capco communication will be conducted via a Capco recruiter.

🏢 Summary: Long-term hybrid opportunity for a senior React Developer to build highly responsive, data-intensive user interfaces for a financial sector client. The role focuses on developing scalable front-end solutions in real-time, high-volume environments using modern engineering best practices. 🗂️ Requirements: 7+ years of professional experience, Bachelor’s or Master’s degree in Computer Science or related field, Strong experience with React, Strong experience with TypeScript and JavaScript, Strong experience with state management, Strong experience with data visualisation, Strong experience with CSS3, Experience building responsive UI for large data sets, Experience in real-time, high-volume systems, Experience with TDD and BDD, Experience with UI test automation frameworks, Experience integrating with RESTful APIs, Understanding of event-driven microservices, Experience with Cloud architecture, Experience with Agile and DevOps practices, Commitment to Clean Code and engineering best practices 📃 Skills: React, TypeScript, JavaScript, CSS3, Redux, REST, C#, Microservices, Azure, TDD, BDD, DevOps, Agile, UI, Cloud 🏢 Description: React Developer We are currently looking for experienced React Developers to join a long-term project with one of our international clients in the financial sector. Location: Wroclaw, Poland (Hybrid – 3 days per week from the office) Experience: 7+ years Requirements: • Bachelor’s and/or Master’s degree or equivalent focusing on Computer Science, Computer Engineering or a related technical discipline. • Strong experience with React and TypeScript/JavaScript. • Strong experience with state management and data visualisation. • Strong experience with CSS3 and JavaScript. • Experience with developing highly responsive user interface components with large data sets, that work in high-volume, real-time environments. • Experience with TDD, BDD and UI Test Automation Frameworks. • UX Design, Interaction and/or Visual Design experience to prototype scenarios and end-to-end experiences with product owners and business stakeholders. • Experience integrating the front end with C# RESTful APIs and event driven microservices is beneficial. • Experience with Cloud architecture and engineering is beneficial, ideally on Microsoft Azure. • Agile, Test Driven Development and DevOps practices are part of your DNA. • A Software Craftsperson focused on engineering best practices and delivering Clean Code. • Good communication skills – both written and verbal. • Strong analytical and problem-solving skills, you like to figure out how things work. • Keen interest in understanding how the business works. • Passion for learning and innovation. 📩 If you’re interested and meet the qualifications, please send your CV to Alina Pchelnikova at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Hybrid Java & React.js Developer role focused on building and maintaining scalable web applications, covering both backend services and modern frontend interfaces. The position involves developing RESTful APIs, implementing responsive UIs, and supporting integration and deployment through CI/CD pipelines. 🗂️ Requirements: Strong experience with Java, Solid experience with React.js, Experience building and consuming REST APIs, Strong knowledge of JavaScript, Strong knowledge of HTML, Strong knowledge of CSS, Experience with Git, Experience with CI/CD pipelines 📃 Skills: Java, React.js, JavaScript, HTML, CSS, REST, Git, CI/CD 🏢 Description: We are looking for an experienced Java & React.js Developer to join our development team in Kraków. In this role, you will work on building and maintaining scalable web applications, contributing to both backend services and modern frontend interfaces. This position follows a hybrid working model with two/three days per week onsite in Kraków . Key Responsibilities Develop and maintain backend services using Java Build responsive and modern user interfaces using React.js Design and implement RESTful APIs Collaborate with product managers, designers, and engineers to deliver new features Write clean, maintainable, and efficient code Participate in code reviews and contribute to development best practices Troubleshoot and resolve technical issues Support integration and deployment through CI/CD pipelines Required Skills and Experience Strong experience with Java Solid experience with React.js Experience building and consuming REST APIs Strong knowledge of JavaScript, HTML, and CSS Experience with Git and modern development workflows Familiarity with Agile development environments Good communication skills in English Nice to Have Experience with Spring Boot Experience with TypeScript Knowledge of SQL databases Familiarity with Docker or cloud platforms Work Model Hybrid: 2 days onsite in Kraków , remaining days remote.

🏢 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: Senior ReactJS UI Engineer role focused on leading front-end architecture and UX optimization for scalable, high-performance web applications. The position involves driving UI enhancements, implementing design patterns, and delivering robust React-based solutions in a hybrid work model. You will collaborate across teams to build stable, user-centric applications used globally. 🗂️ Requirements: 7+ years experience in production React ecosystem applications, Strong proficiency in React and TypeScript, Commercial experience in web development, Experience translating requirements into wireframes and high-fidelity prototypes, Solid understanding of SDLC, Experience with front-end architecture and Design Patterns, Strong troubleshooting and problem-solving skills, Familiarity with CI/CD and DevOps practices 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, SDLC, CI/CD, DevOps, UX, UI, Architecture, Prototyping, Wireframing, DesignPatterns 🏢 Description: Unleash innovation in front-end development — shape the future of seamless UI experiences! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior ReactJS UI Engineer – Front-End Architecture & UX Optimization , you will be working for our client, a leading technology company focused on delivering cutting-edge web applications. You will drive UI enhancements, architect scalable front-end solutions, and optimize user experience to ensure high performance and stability across platforms—contributing to innovative projects that impact users worldwide. Your main responsibilities: Lead UI enhancements and improvements to elevate overall UX and application stability Participate in designing robust front-end architecture aligned with best practices Implement solutions utilizing proven Design Patterns for scalable and maintainable code Analyze requirements thoroughly to suggest improvements and optimizations Manage changes effectively throughout the Service management lifecycle Develop and prototype application features to validate concepts and designs Provide prompt and effective support to address and resolve user issues Collaborate with cross-functional teams to deliver high-quality solutions You're ideal for this role if you have: 7+ years of professional experience in production React ecosystem applications, including UI/UX design Strong proficiency in React and TypeScript Web development Proven experience in translating product requirements into wireframes and high-fidelity prototypes Solid understanding of the Software Development Life Cycle (SDLC) Exceptional troubleshooting and problem-solving skills in high-pressure environments Familiarity with DevOps practices like CI/CD pipelines It is a strong plus if you have: (optional) Experience with modern UI design tools and frameworks Certifications related to React, TypeScript, or Front-End architecture Language Required for the role: Fluent English command, both written and spoken Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER