Senior Frontend Engineer (React)

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

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

🏢 Summary: Senior Frontend Engineer role focused on building and evolving scalable, maintainable web applications using React. The position involves leading development of user-facing features, ensuring performance and accessibility, and shaping the frontend architecture. You will own features end-to-end and collaborate closely with product and design to deliver high-quality solutions. 🗂️ Requirements: Commercial experience with React, Experience building complex frontend features, Ability to work independently on frontend tasks, Experience collaborating with product and design stakeholders, Strong focus on code quality and maintainability, Experience optimizing performance and accessibility 📃 Skills: React, JavaScript, TypeScript, HTML, CSS, Testing, Accessibility, Performance, Git, DesignSystems 🏢 Description: We are hiring a Senior Frontend Engineer to join a product-focused team working on modern web applications for our client. In this role, you’ll take the lead in building user-facing features that are reliable, scalable, and easy to maintain. You’ll work at the intersection of engineering, product, and design — turning ideas into real, high-quality solutions used by end users. This is a position for someone who is comfortable making decisions, taking responsibility for their work, and actively shaping the frontend layer of the product. Your day-to-day Build and evolve frontend features with a focus on scalability and long-term maintainability Turn product concepts and design mockups into functional, high-quality interfaces Work closely with product and design stakeholders to refine solutions and improve user experience Take care of application performance, accessibility, and overall code health Influence technical direction within the frontend domain Spot inefficiencies and improve existing solutions and codebase structure Own your work end-to-end — from idea to production. What we’re looking for Solid commercial experience in frontend development with React Confidence in delivering complex features without close supervision Experience collaborating with non-engineering stakeholders (e.g. product, design) Strong focus on code quality, readability, and long-term maintainability Ownership mindset — you don’t just implement tasks, you drive solutions. Nice to have Experience working on complex or large-scale web platforms Exposure to shared frontend ecosystems or multi-team environments Familiarity with component-driven development and design systems Interest in growing your skills in TypeScript and modern frontend testing practices

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

🏢 Summary: Senior Front-End Engineer role focused on building scalable, responsive enterprise web applications using React and modern front-end technologies. The position involves collaborating with UX, product, and backend teams, leading front-end architecture decisions, optimizing performance, and mentoring engineers in an Agile environment. Hybrid work near Fort Lauderdale, FL with emphasis on clean architecture, reusable UI systems, and enterprise-grade user experiences. 🗂️ Requirements: 8+ years developing enterprise front-end applications, 3+ years advanced React.js experience, Proficiency in JavaScript, HTML5, CSS3, Experience with responsive CSS frameworks, Knowledge of component-driven architecture and scalable front-end design, Experience with wireframes, prototypes, and UI design tools, Front-end performance optimization experience, Proficiency with Git and version control workflows, Knowledge of code reviews, testing, debugging, and maintainable architecture, Ability to work in Agile/Scrum environments, Authorization to work in the U.S., Residence in Florida 📃 Skills: React, JavaScript, HTML5, CSS3, Redux, Zustand, Tailwind, Bootstrap, MaterialUI, Figma, AdobeXD, Sketch, Git, Next.js, TypeScript, Jest 🏢 Description: About the Role The Senior Front-End Engineer role is an opportunity to build modern, responsive web applications that deliver exceptional user experiences for enterprise customers. You'll collaborate with designers, product leaders, and backend engineers to transform ideas into intuitive, scalable interfaces while influencing both technical direction and user experience. This position is ideal for someone who enjoys owning the front-end architecture, mentoring teammates, and delivering polished applications that perform at scale. What You'll Do - Design and develop modern, responsive web applications using React and contemporary front-end development practices. - Partner closely with UX designers, product managers, and backend engineers to translate business requirements into intuitive user interfaces. - Convert wireframes, prototypes, and visual concepts into clean, maintainable, production-ready code. - Build reusable UI components and scalable design patterns that promote consistency across applications. - Champion performance optimization techniques to ensure fast, responsive, and reliable user experiences. - Create interfaces that are accessible, responsive, and compatible across modern browsers and devices. - Participate throughout the full front-end development lifecycle, from solution design through deployment and ongoing enhancements. - Conduct peer code reviews, share technical knowledge, and mentor junior engineers on development standards and best practices. - Promote clean architecture, automated testing, maintainable code, and continuous improvement within the engineering team. - Collaborate in Agile ceremonies and contribute to technical planning, estimation, and solution design. What You'll Bring - 8+ years of professional experience developing enterprise front-end applications. - 3+ years advanced expertise with React.js, including functional components, Hooks, Context API, and modern state management approaches such as Redux/Zustand. - 2–3+ years of hands-on involvement with UI/UX design, user-centered design principles, or close collaboration with design teams. - Strong proficiency with JavaScript (ES6+), HTML5, CSS3, responsive layouts, and modern browser capabilities. - Experience developing responsive interfaces using CSS frameworks such as Tailwind CSS, Bootstrap, or Material UI. - Solid understanding of component-driven architecture, reusable design systems, and scalable front-end application design. - Experience creating or working from wireframes, prototypes, mockups, and interactive designs using tools such as Figma, Adobe XD, or Sketch. - Strong knowledge of UI design fundamentals, including typography, spacing, color theory, layout, and usability. - Experience optimizing front-end performance through techniques such as lazy loading, code splitting, rendering optimization, and efficient state management. - Proficiency with Git, collaborative version control workflows, and modern software development practices. - Strong understanding of software quality practices, including code reviews, debugging, testing, and maintainable application architecture. - Excellent communication skills with the ability to collaborate effectively across engineering, product, and design teams. Nice to Have - Experience with Next.js and server-side rendering. - Working knowledge of TypeScript. - Familiarity with WCAG accessibility standards and inclusive design practices. - Experience with automated testing frameworks such as Jest and React Testing Library. - Experience working within Agile/Scrum delivery environments. - Previous experience mentoring developers or serving as a technical lead on front-end initiatives. Location - Hybrid role: 3 days onsite and 2 days remote near Fort Lauderdale, FL. - Applicants must be authorized to work for any employer in the U.S. - Candidates must reside in Florida. Compensation and Benefits - Estimated compensation range: $40–$50 USD. - Eligible for discretionary bonuses, commissions, and incentive programs. - Comprehensive benefits package including medical, dental, vision, 401(k), and paid time off. ADA Specifications - Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.

🏢 Summary: Remote B2B contract role for a Senior Frontend Engineer to own and scale web and mobile experiences, including an AI-driven chat interface and complex health data UIs. The position focuses on building high-performance, production-grade applications using modern frontend technologies while collaborating closely with product and design. Candidates will drive frontend architecture, performance, and feature ownership in a fast-moving AI health tech environment. 🗂️ Requirements: 5+ years experience with React and TypeScript, Experience building production-level applications with real users, Strong frontend architecture and UI system design skills, Experience with web and mobile development, Ability to own features end-to-end, Experience with backend integration, Willingness to work weekends, Ability to work in fast-paced, ambiguous environment 📃 Skills: React, ReactNative, TypeScript, JavaScript, HTML, CSS, AI, Frontend, Mobile, Web 🏢 Description: Senior Frontend Engineer Location: Remote Europe or Poland preferred Type: B2B contract Compensation: 200,000 to 260,000 PLN base yearly plus up to 140,000.00 PLN vested over 4 years in Equity. Equity: Open to discussion About us We are building the intelligence layer for pet health. Our goal is to transform how pet owners and veterinarians understand, monitor, and act on health data. We combine AI, diagnostics, and longitudinal data to create a system that does not exist today. We are early, fast moving, and already working with real partners and data. What you will do Own the frontend across web and mobile experiences Build a fast, intuitive AI chat interface used daily by pet owners and vets Design and implement complex UI systems for health data, reports, and recommendations Work closely with product and design to ship quickly and iterate constantly Drive performance, responsiveness, and reliability at scale Help define the product, not just implement it What we are looking for Strong experience with React and TypeScript, 5+ Years Experience building production level apps with real users Eye for design and product quality Comfortable working in ambiguity and moving fast Ability to own features end to end Experience with Backend Willing to work weekends Bonus if you have worked on AI products, data heavy UIs, or health tech Tech stack React, React Native TypeScript Modern frontend tooling AI integrated workflows Why this role Working along some of the most famous engineers in AI like Soumith Chintala CTO of Thinking Machine Labs (Advisor) Direct impact on product, not just tickets Work on something genuinely new in AI and biology Fast iteration, real users, real data Equity Meaningful upside tied to company growth Early team member level ownership

🏢 Summary: Senior Front-End Engineer role focused on designing and implementing a micro-frontend architecture for a large-scale, real-time incident reporting platform. The position involves transforming monolithic systems into scalable microservices-based solutions and ensuring high performance, security, and maintainability. The engineer will collaborate with cross-functional teams to deliver secure, cloud-ready web applications. 🗂️ Requirements: University degree in Computer Science or related field, Minimum 5 years of front-end development experience, Advanced knowledge of JavaScript and TypeScript, Strong experience with Angular framework, Practical experience with SPA and micro-frontend architectures, Experience with .NET and C#, In-depth knowledge of HTML5 and Web Components, Knowledge of web application performance optimisation and scalability, Understanding of web application security principles, Familiarity with cloud environments and container platforms 📃 Skills: JavaScript, TypeScript, Angular, SPA, Microfrontends, .NET, C#, HTML5, WebComponents, APIs, OpenShift, Cloud, Docker, Microservices 🏢 Description: For one of our business partners, we are looking for Senior Front-End Engineer (Micro-Frontends) . You will be joining a strategic project for a European institution , located in Warsaw, linked to security and border control activities. The project aims to develop a new generation of systems capable of reporting and disseminating information on incidents in real time. The solution will implement the new requirements set out in the regulation recently adopted by the European Commission. As a Senior Front-End Engineer, you will participate in the definition, design and implementation of the new platform, working closely with multidisciplinary teams to build scalable, secure and high-performance solutions: Design and implement solutions based on micro-frontend architecture . Participate in the transformation of monolithic applications into architectures based on microservices and micro-frontends. Analyse, optimise and improve the performance, scalability and maintainability of applications. Apply security best practices from the design phase (Security by Design). Collaborate with business analysts in defining and validating functional requirements. Work closely with backend and frontend teams to ensure integrated and consistent solutions. Produce high-quality technical documentation. Carry out code reviews and contribute to the continuous improvement of development standards. Support the analysis and design of user interfaces (UI/UX) For this role, we are seeking experts in front-end software development with: A university degree in Computer Science, Computer Engineering, Telecommunications, Information Technology, Business Administration and Management, or related disciplines. A minimum of 5 years demonstrable professional experience in front-end development . Advanced knowledge of JavaScript and TypeScript . Solid experience with modern frameworks such as Angular . Practical experience with SPA and micro-frontend architectures . Experience in .NET with C# . In-depth knowledge of HTML5 , Web Components and standard browser APIs . Knowledge of performance optimisation, scalability and security in web applications. Familiarity with cloud environments and container platforms (experience with OpenShift will be an advantage). Offer: Contract: B2B signed with Shimi Rate 1400 PLN/MD net+VAT Type of work: 100% remote (except the 1st day) Full time job Benefits : Multisport card and private medical care

🏢 Summary: Senior Frontend Engineer role focused on driving architectural direction and building scalable, high-quality frontend solutions using React and TypeScript. The position involves designing core features, shaping best practices, improving CI/CD and observability, and mentoring engineers. The engineer will collaborate cross-functionally to deliver performant, maintainable, and accessible user experiences. 🗂️ Requirements: Extensive experience with large-scale frontend applications, Strong hands-on experience with React, Strong hands-on experience with TypeScript, Deep understanding of web architecture and component design, Experience with performance optimization and responsive UI patterns, Solid knowledge of build tools, Experience with version control systems, Experience with CI/CD pipelines, Ability to design scalable and maintainable frontend solutions, Experience contributing to testing and deployment processes 📃 Skills: React, ReactNative, TypeScript, JavaScript, CI/CD, Git, HTML, CSS, Web, Serverless, Cloud 🏢 Description: Senior Frontend Engineer We’re looking for a seasoned engineer who combines deep hands-on skills with the ability to guide architectural direction, influence technical strategy, and mentor others. About the Role Your work will directly shape how thousands of businesses worldwide interact with the clients solutions — improving user experiences, driving customer satisfaction, and helping companies save valuable time. As part of this role, you will be making technical decisions, mentor colleagues, and contribute to setting best practices that strengthen frontend engineering across the company. You’ll collaborate closely with product managers, UX designers, and backend engineers to turn ideas into well-engineered solutions — balancing product velocity with long-term maintainability. Key Responsibilities Drive architectural and technical direction for frontend solutions across product suite. Design and implement core features and shared components using React/React Native, and TypeScript. Evaluate and introduce new technologies, patterns, and tools that improve scalability, maintainability, and performance. Contribute to the design system and ensure consistent, accessible, and performant user experiences. Work closely with other engineers to review code, share knowledge, and improve development practices. Act as a technical mentor — helping others grow through feedback, guidance, and collaboration. Ensure strong build, deployment, and testing processes that support rapid, reliable delivery. Contribute, or lead, broader engineering initiatives such as CI/CD improvements, observability, and cross-product consistency. Key Requirements Extensive experience in building and maintaining large-scale frontend applications. Deep understanding of web architecture, component design, performance optimization, and responsive UI patterns. Strong hands-on experience with React and TypeScript. Solid knowledge of build tools, version control, and CI/CD pipelines. A pragmatic mindset — able to balance innovation with delivery. Excellent collaboration and communication skills. Passion for technical craftsmanship and for helping others grow through mentorship and example. Nice to Have Experience in designing intuitive user interfaces. Familiarity with cloud services and serverless architectures. Knowledge of accessibility standards in web development. Location: København Allocation: Full-time. Start date: ASAP End date: 3-6 months

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

🏢 Summary: Senior Frontend Software Engineer role focused on building and delivering cloud-based software using modern JavaScript technologies, React, and Software Craftsmanship practices in a remote-first environment. The position involves end-to-end software development, collaboration with international teams, and working with distributed systems and cloud platforms. Candidates will contribute to scalable solutions while leveraging AI-assisted development tools and clean architecture principles. 🗂️ Requirements: 5+ years of professional experience with JavaScript, Experience with Modern JavaScript, Experience with TypeScript, Experience with React, Experience with RxJS, Experience with Node, Experience with Mocha, Experience with Express, Experience with Enzyme, Understanding of distributed systems, Understanding of microservices, Understanding of event-driven architectures, Experience with cloud platforms, AI-assisted software development experience, Ability to design, test, deploy, and maintain cloud-based systems 📃 Skills: JavaScript, TypeScript, React, RxJS, Node, Mocha, Express, Enzyme, AWS, GCP, Azure, Microservices, Cloud, Claude 🏢 Description: We are looking for a Senior Frontend Software Engineer who is hungry to deliver quality software at pace, by utilising the latest technology trends and modern Software Craftsmanship techniques. Who are we ? We are a remote-first boutique software house company founded by a group of seasoned software experts (average experience in the team is 12 years). What connected all of us, despite a long-term relationship, is a passion for building Great Software that matters. We believe in people, so this is why the key values of Shaped Thoughts are autonomy and trust. Our people have a real and direct impact on what and how we build things. We put extra effort into ensuring everyone can make a difference and grow among other experts. Qualifications: Modern JS, TypeScript, React, RxJS, Node, Mocha, Express, Enzyme 5+ years of professional experience with JavaScript Understanding of distributed systems, microservices, and event-driven architectures Experience with cloud platforms (AWS / GCP / Azure) AI-assisted software development experience As a part of the team you will : Design, implement, code review, test and deploy cloud-based systems Develop software from start to finish - you ship it, you run it! Collaborate with other international teams on paving the way for a successful delivery Work closely with senior stakeholders on identifying business requirements and shaping the product Deliver quality technical solutions that come from a robust design and clean architecture Build & improve the software delivery process using tools such as Claude Code How do we work? We work as a team - all people can freely exchange knowledge and tasks, that’s why we’re looking for strong team players We believe in continuous improvement (Kaizen mindset) We’re happy to share knowledge and spend time learning our domain and new technologies We value asynchronous communication for work, however we meet in person to improve our personal relationships What do we offer ? Being a part of a strong senior team with an ability to learn and exchange knowledge Remote-first work environment (or you can work from our office in Wroclaw if you fancy :-) B2B rate 140-190 PLN / hour, depending on your level of expertise Open-ended B2B contract or contract of employment Recruitment process It consists of the following stages: CV screening Tech screening (45 min) Live coding session (1.15h) The last stage is F2F and requires on-site presence in one of the major cities: Wrocław, Poznań, Katowice, Kraków, Warszawa or Gdańsk. We actively encourage AI-assisted development in our daily work. However, during recruitment, we want to assess your individual skills - please don't use AI assistance unless explicitly permitted for a given stage.