June 12, 2026

Senior Fullstack React Engineer (PST Overlap)

Senior • Remote

26,000 - 29,000 PLN

Kraków, Poland

About the role: 

Our client is one of the largest game studios known for its very successful online MOBA and FPS franchises. You will be part of a Player Platform team responsible for building and maintaining core player-facing client applications used across all the clients’ products.

On a daily basis you will be working on the player-facing portion of the Game Client desktop application powered by Electron. The tech stack is JavaScript, TypeScript, React, CSS and HTML.

The majority of work will be around building out dynamic and polished UIs in the frontend that are powered by API data which requires solid experience of working with web-based APIs. We leverage Storybook for our component development and use Jest for testing. This role will be embedded into the team and you will collaborate with team members closely including engineers, QA, design and product. You may also work with other partner teams directly. Experience with working on desktop client applications is a plus.


Please note, availability to attend afternoon/evening meetings is a requirement for this role as most of the team is located on the US West Coast (LA and Seattle)


Responsibilities:

  • Partner closely with Senior Engineers and Design to create and iterate on well crafted user experiences

  • Build out complex Electron applications that support the Game Client development

  • Work with partner teams and platforms to bring experience to life

  • Quickly iterate on prototypes and new areas to find feasible solutions for the products we are building

  • Create, manage and document RESTful APIs

  • Write and execute unit, integration and end-to-end tests, participate in code reviews

Required qualifications: 

  • 6+ years of experience with Frontend Technologies

  • 5+ years of experience with React

  • Bachelor's or higher degree in Computer Science, Software Engineering, or a related field

  • Strong frontend focus with the skills to dive into backend when needed - comfortable across the stack, but passionate about crafting great user-facing experiences

  • Deep hands-on programming experience with Typescript and React

  • Good understanding of modern web architecture and technologies

  • Attention to detail, including spacing, CSS animations, and user experience nuances

  • Understanding of accessibility standards and guidelines (e.g., WCAG)

  • Aptitude for debugging, analyzing issues, and implementing effective solutions

  • Experience building frontend interfaces directly from design mockups in Figma or similar tools

  • Familiarity with testing frameworks (e.g., Jest, RTL, Playwright)

  • Experience with version control tools (e.g., Git) and build tools (e.g., Webpack, Vite)

  • Proficiency in building RESTful APIs and handling data formats like JSON/XML

  • Effective communication and teamwork skills

Nice to have:

  • Experience with building Electron desktop applications

  • Experience with CI/CD - Docker, Github Actions

  • Hands-on experience working with Public Cloud, preferably AWS

  • Experience with observability and monitoring tools, preferably Datadog

Similar jobs you might like

Technology

Appliscale

Senior Frontend React Engineer (PST Overlap)

Senior

Remote

Krakow, Poland

24,000 - 28,000 PLN

🏢 Summary: Senior Frontend Software Engineer role focused on building and maintaining complex web applications that power competitive tournament systems and public-facing experiences. The position involves end-to-end ownership of frontend features, including graph-based workflows, account management, and tournament operations. You will collaborate cross-functionally to deliver high-quality, scalable, and performant UI solutions integrated with backend services. 🗂️ Requirements: 5+ years frontend development experience, 4+ years experience with React, 4+ years experience with TypeScript, Bachelor's degree in Computer Science or related field, Senior-level experience building production frontend applications, Hands-on experience with GraphQL, Hands-on experience with Next.js including SSR and CSR, Experience integrating frontend with backend services, Understanding of modern frontend architecture, Knowledge of state management patterns, Experience with component-based design, Understanding of accessibility standards (WCAG), Ability to work in distributed teams across time zones 📃 Skills: React, TypeScript, JavaScript, GraphQL, Next.js, SSR, CSR, REST, Spring, HTML, CSS, WCAG 🏢 Description: About the role: Our client is one of the largest game studios known for its very successful online MOBA and FPS franchises. You will be part of a team that builds the systems and tools that power competitive play - from internal operator tooling used to create and manage tournaments, to player-facing web experiences that support competition at scale. We’re looking for a Senior Frontend Software Engineer to help us design and build complex frontend applications that support tournament creation, account management, and competition workflows. This role will work across internal operator tools as well as contribute to our public-facing experiences. This is a hands-on senior role where you’ll be expected to take ownership of features end-to-end, collaborate closely with product and backend partners, and deliver high-quality, maintainable frontend code. You will work closely with the engineering team in Los Angeles and other locations in the US West Coast. Due to working across multiple time zones, flexibility to attend later meetings on a daily basis is an important factor for success in this role (up to 9-10PM CEST). Each team member is expected to proactively propose tools, designs, and implementation strategies. Responsibilities: Design, build, and maintain frontend applications that support tournament setup, configuration, and operations. Work on complex UI workflows for creating and managing graph-based tournament structures. Contribute to public-facing web experiences with a focus on performance, usability, and polish. Collaborate closely with backend engineers, product managers, and designers to translate requirements into robust UI solutions. Integrate frontend applications with backend services, including GraphQL APIs and Java Spring REST APIs. Participate fully in team rituals, including 2-week sprints, planning, refinement, and retrospectives. Take clear ownership of your work - asking questions early, surfacing risks, and caring deeply about the quality of the end results Required qualifications: 5+ years of experience with Frontend Technologies 4+ years of experience with React and Typescript Bachelor's or higher degree in Computer Science , Software Engineering, or a related field Senior-level experience building production frontend applications. Hands-on experience with GraphQL and Next.js , including both SSR and CSR patterns. Experience integrating frontend applications with backend services (experience consuming Java Spring REST APIs is a plus). Solid understanding of modern frontend architecture, state management, and component design. Comfortable working independently in a remote environment while staying engaged and communicative. Understanding of accessibility standards and guidelines (e.g. WCAG) Nice to have: Working with PaaS Vendors like Netlify Hands-on experience working with Public Cloud, preferably AWS (Lambda/Serverless). Familiarity with complex data visualization or workflow-heavy UIs. Experience working on consumer-facing web products at scale. Familiarity with trading card games (TCGs) and tournament formats (e.g., Swiss rounds, decklists, brackets), or a strong interest in competitive gaming, esports. Familiarity with testing frameworks (e.g. JEST, RTL. Playwright) Experience with observability and monitoring tools, preferably Datadog

Technology

PTT Consulting Sp. z o. o.

Frontend Game Engineer

Senior

Remote

Warsaw, Poland

160 - 190 PLN

🏢 Summary: Senior Frontend Architect role focused on building and evolving scalable frontend architecture for multiple HTML5 game clients. The position involves developing reusable frameworks, implementing real-time client-server communication, and delivering interactive web-based game experiences using modern frontend technologies. The role also ensures architectural standards, performance, and compliance across game clients. 🗂️ Requirements: 5+ years experience with React and TypeScript, Experience with HTML5 game technologies (Three.js or PlayCanvas), Experience building interactive or real-time web applications, Strong knowledge of event-driven or state-driven frontend architectures, Solid understanding of asynchronous programming and real-time client-server communication, Experience with Vite and modern CSS frameworks, Experience with automated frontend testing frameworks, Strong experience with Git and version control workflows, Ability to design scalable frontend architectures 📃 Skills: React, TypeScript, JavaScript, HTML5, CSS, Vite, Tailwind, Three.js, PlayCanvas, Git, WebSockets, Testing 🏢 Description: Key responsibilities: Own and evolve the frontend architecture and technical frameworks used across multiple game clients. Design and maintain reusable client foundations and game category frameworks supporting different game paradigms. Develop and maintain frontend systems using React, TypeScript, Vite, and modern CSS frameworks. Implement and maintain event-driven client-server communication patterns for realtime and on-demand gameplay flows. Translate gameplay flows, UX layouts, and production specifications into scalable frontend implementations. Support and guide external development studios building game experiences on top of the client frameworks. Maintain and manage source code repositories, versioning practices, and build pipelines for game clients. Define and enforce frontend architecture patterns, testing practices, and coding standards. Collaborate with product, design, backend, and QA teams to ensure smooth integration and reliable player experiences. Identify architectural risks, performance bottlenecks, and technical dependencies early and drive resolution. Ensure all game clients comply with technical, operational, and regulatory requirements Reguirements: 5+ years of experience developing complex frontend applications using React and TypeScript. Experience with HTML5 game development technologies, such as Three.js or PlayCanva s. Experience building interactive or real-time graphical applications for the web. Experience working with external development studios or distributed engineering teams. Strong experience building state-driven or event-driven frontend systems. Solid understanding of asynchronous programming and real-time client-server interactions. Experience with modern frontend tooling such as Vite, CSS frameworks (e.g., Tailwind), and automated testing frameworks . Strong experience with Git, version control, and collaborative development workflows . Ability to translate product and UX concepts into robust technical implementations. Experience collaborating with designers, backend engineers, and product teams. Strong problem-solving and communication skills. Nice to have: Experience working in regulated, transactional, or high-reliability environments is a plus. Client: A global leader with a sharp focus on lottery solutions. A confident step forward building on a long history of delivering safe and secure technology, demonstrating strong commitment to customers as a dedicated lottery service provider. Leveraging collective insight, experience, and expertise to create reliable and engaging solutions that help lottery clients achieve objectives, meet player needs, and deliver meaningful benefits to communities.

Technology

Link Group

Frontend Developer

Senior

Remote

Lublin, LU, Poland

32,000 - 32,000 PLN

🏢 Summary: Frontend Engineer role focused on leading and evolving the architecture of digital draw game clients. Responsible for building and optimizing scalable, event-driven frontend systems using a modern React and TypeScript stack, enabling real-time gameplay and backend communication. The position includes ownership of client frameworks, build pipelines, and technical alignment with external studios. 🗂️ Requirements: 5+ years developing complex frontend applications, Strong experience with React, Strong experience with TypeScript, Hands-on experience with HTML5 game technologies, Experience building interactive web applications, Strong knowledge of state-driven systems, Strong knowledge of event-driven systems, Deep understanding of asynchronous programming, Proficiency with Vite, Experience with CSS frameworks, Experience with automated testing environments, Experience with Git and version control workflows 📃 Skills: React, TypeScript, Vite, HTML5, Three.js, PlayCanvas, JavaScript, Tailwind, CSS, Git, Testing, Asynchronous 🏢 Description: Frontend developer We are looking for an experienced Engineer to take technical ownership of the frontend architecture powering our digital draw games. In this role, you will design and maintain the core client frameworks that enable the integration of various game categories with our platform, defining how games handle lifecycles, player interactions, and real-time backend communication. Responsibilities: Architectural Leadership: Lead the evolution of frontend frameworks and reusable client foundations to support diverse game paradigms. Core Development: Build and optimize frontend systems using a modern stack including React, TypeScript, and Vite . Communication Patterns: Implement robust, event-driven client-server interactions for both on-demand and real-time gameplay. Technical Translation: Turn complex gameplay flows, UX layouts, and production specs into scalable, high-performance implementations. External Partnership: Act as a technical guide for external development studios, ensuring their games align with our architectural standards. Standards & Quality: Enforce coding standards, manage build pipelines, and identify technical bottlenecks or risks early in the lifecycle. Requirements: 5+ years of experience developing complex frontend applications with a focus on React and TypeScript . Hands-on experience with HTML5 game technologies , such as Three.js or PlayCanvas , and building interactive web applications. Strong background in state-driven and event-driven systems , including a deep understanding of asynchronous programming. Proficiency with modern tooling, including Vite, CSS frameworks (like Tailwind) , and automated testing environments. Collaboration Skills: Proven ability to work alongside designers and backend teams to translate product concepts into technical reality. Workflow Expertise: Solid experience with Git , version control practices, and managing collaborative development workflows.

Technology

Appliscale

Senior Frontend Engineer with React

Senior

Remote

Krakow, Poland

19,000 - 24,000 USD

🏢 Summary: Frontend Developer role focused on designing, developing, testing, deploying, and maintaining React and TypeScript applications used across multiple European markets. The position involves working with modern frontend technologies, integrating with REST/GraphQL APIs, and supporting production systems. The role requires strong software engineering expertise and collaboration within Agile teams. 🗂️ Requirements: 5+ years of production experience with React, Strong proficiency in TypeScript, Strong understanding of software engineering principles, Experience with testing and design systems, Experience with REST APIs, Experience with GraphQL APIs, Familiarity with PostgreSQL or DynamoDB, Computer Science degree, Experience with AI tooling, Experience working in Agile (SCRUM or Kanban) environments 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST, GraphQL, AWS, Terraform, PostgreSQL, DynamoDB, Docker, Kubernetes, Jenkins, CircleCI, GitlabCI, Datadog 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST/GraphQL APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in React & TypeScript Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Required qualifications: 5+ years of production software development experience in React Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST/GraphQL APIs Familiarity with DBMS like PostgreSQL, DynamoDB Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

Technology

Appliscale

Senior Fullstack (Frontend heavy - React) Engineer

Senior

Remote

Krakow, Poland

19,000 - 25,000 PLN

🏢 Summary: Senior Frontend Developer role focused on designing, building, testing, deploying, and maintaining a React and TypeScript-based frontend system integrated with backend services and mobile apps. The position involves frontend architecture design, production support, and working within Agile teams to deliver scalable solutions used across multiple countries. 🗂️ Requirements: 5+ years of production experience with React, Strong hands-on experience with TypeScript, Strong understanding of software engineering principles, Experience with testing and design systems, Knowledge of REST APIs, Familiarity with DBMS such as PostgreSQL or DynamoDB, Degree in Computer Science, Experience working with Agile methodologies (SCRUM or Kanban), Experience using AI tooling 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, REST, PostgreSQL, DynamoDB, Testing, DesignSystems, Agile, SCRUM, Kanban, AI 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in React & TypeScript Design frontend software architecture with connection to backend services and mobile apps Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in React Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST APIs Familiarity with DBMS like PostgreSQL, DynamoDB Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

Technology

Appliscale

Senior Frontend Engineer with Angular

Senior

Remote

Krakow, Poland

19,000 - 24,000 USD

🏢 Summary: The role is for a Senior Frontend Developer responsible for designing, developing, testing, deploying, and maintaining Angular-based frontend systems used in production across multiple European countries. The position involves working with modern frontend technologies, integrating with APIs, and collaborating in Agile teams to deliver new features and maintain high-quality applications. 🗂️ Requirements: 5+ years of production experience with Angular, Strong expertise in TypeScript, Experience with reactive programming using RxJS, Understanding of software engineering principles and testing practices, Experience with REST or GraphQL APIs, Familiarity with PostgreSQL or DynamoDB, Experience maintaining production systems, Degree in Computer Science, Experience working with Agile methodologies (SCRUM or Kanban), Proficiency in English 📃 Skills: Angular, TypeScript, JavaScript, RxJS, HTML, CSS, Cypress, Playwright, Node.js, REST, GraphQL, AWS, Terraform, PostgreSQL, DynamoDB 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: Angular, TypeScript, JavaScript, RxJS, HTML, CSS, Cypress, Playwright, Node.js, REST/GraphQL APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in Angular & TypeScript Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Required qualifications: 5+ years of production software development experience in Angular Skilled within reactive programming patterns (RxJS) Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST/GraphQL APIs Familiarity with DBMS like PostgreSQL, DynamoDB AI Tooling usage Computer Science degree Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

Technology

Evolution

Frontend Developer

Senior

Hybrid

Warsaw, MZ, Poland

20,000 - 30,000 PLN

🏢 Summary: Frontend Developer role focused on building and maintaining scalable, high-quality user interfaces using TypeScript and React. The position involves close collaboration with designers, backend developers, and product stakeholders to deliver performant and maintainable user-facing features. The offer includes hybrid work, professional growth opportunities, and a comprehensive social benefits package. 🗂️ Requirements: Extensive experience building large, scalable frontend applications, Strong proficiency in TypeScript, Strong proficiency in React, Solid understanding of frontend architecture, Knowledge of design patterns, Ability to design complex user interfaces, Experience ensuring code scalability and performance optimization 📃 Skills: TypeScript, React, JavaScript, HTML, CSS 🏢 Description: We are looking for a frontend developer who is passionate about designing and building high-quality, intuitive user interfaces. In this role, you will collaborate closely with engineers, designers, and product stakeholders to deliver user-facing features across a range of products and internal tools. We value developers who actively contribute to shaping solutions - thinking through usability, performance, and long-term maintainability. You should feel comfortable discussing ideas, proposing improvements, and helping refine both technical and product decisions. In our company, frontend developers are expected to combine attention to detail, strong collaboration skills, and a proactive mindset. We value people who take ownership of their work, communicate clearly, and continuously look for ways to improve the user experience and the systems behind it. Key Responsibilities: Develop and maintain high-quality frontend applications using TypeScript and React . Design complex user interfaces. Ensure the application’s code is scalable, consistent, maintainable and optimised for performance. Collaborate closely with UX/UI designers Collaborate closely with backend developers and BA/product managers Take ownership of features and technical decisions, diving into details to ensure high-quality results. Requirements: A proactive problem solver and analytical thinker . Keen attention to detail and willingness to dive deep into technical challenges. Extensive experience in building large, consistent, maintainable and scalable frontend applications. Solid understanding of frontend architecture and design patterns. Strong proficiency in TypeScript and React . Additional information: Working for one of the top gambling companies in the world Opportunity to influence the quality of the products, improve process and implement your ideas Social package, including sport compensation & medical insurance Professional growth Free parking space (hybrid type of work- 3 days from the office, 2 days from home) Sport activities, parties, and team buildings

Technology

emagine Polska

Web Frontend Engineer (React / Next.js)

Mid

On-site

Copenhagen, Denmark

🏢 Summary: Frontend engineering role focused on building scalable, high-performance web applications using React and Next.js. The position involves developing modern user interfaces, collaborating with cross-functional teams, and contributing to shared component architecture and development practices. Suitable for mid-level to senior developers with strong web development experience. 🗂️ Requirements: 5+ years frontend/web development experience, Strong experience with React, Strong experience with TypeScript, Experience with Next.js or similar framework, Understanding of performance and scalability principles, Experience integrating APIs and backend services, Experience with Git version control, Experience with CI/CD pipelines 📃 Skills: React, Next.js, TypeScript, JavaScript, HTML, CSS, REST, Git, CICD, Jest, Playwright, Cypress, Cloud 🏢 Description: Web Frontend Engineer (React / Next.js) Do you want to help shape modern, scalable web applications used by thousands of businesses worldwide? Our client is looking for a skilled frontend developer with a strong focus on web technologies — especially React and Next.js — to help drive the development of high-quality, user-centric solutions. About the Role In this role, you will play a key part in building and evolving our clients web-based user interfaces. You’ll work closely with product managers, UX designers, and backend engineers to deliver performant, scalable, and intuitive solutions that create real value for customers. We are looking for developers across different seniority levels — both experienced profiles and developers with 5–10 years of experience who are eager to grow and take ownership. Key Responsibilities Develop and maintain modern web applications using React, Next.js, and TypeScript Build reusable components and scalable frontend architecture Collaborate closely with product and design teams to translate requirements into high-quality user experiences Ensure performance, accessibility, and responsiveness across applications Contribute to and evolve shared component libraries and design systems Participate in code reviews and contribute to improving development practices Work with CI/CD pipelines and modern development workflows Stay updated on frontend trends, tools, and best practices Key Requirements Solid experience with React and TypeScript in a web context Experience with Next.js or similar frameworks is highly preferred 5+ years of experience in frontend/web development (we are open to mid-level and senior profiles) Strong understanding of modern web development principles (performance, scalability, component architecture) Experience working with APIs and integrating backend services Familiarity with version control (Git) and CI/CD pipelines A collaborative mindset and strong communication skills Motivation to learn, improve, and contribute to a strong engineering culture Nice to Have Experience with design systems and component libraries Knowledge of testing frameworks (e.g., Jest, Playwright, Cypress) Experience with performance optimization and monitoring Exposure to cloud environments and modern deployment setups

Technology

INTER-TEAM Sp. z o.o.

Frontend Developer (React / Next.js / Playwright) - Mobility Solutions

Mid

Remote

Warsaw, Poland

🏢 Summary: Frontend Developer role focused on building modern web applications using React, TypeScript, and Next.js (App Router) in a clean, up-to-date monorepo environment. The position involves developing complex UI components, maintaining a shared design system, and implementing comprehensive unit and E2E testing. The role emphasizes high code quality, collaboration, and use of modern tools including AI-assisted development. 🗂️ Requirements: Strong JavaScript skills, Strong TypeScript skills, Commercial or strong practical experience with React, Good knowledge of HTML, Good knowledge of CSS, Experience with responsive design, Experience with REST APIs, Experience with GraphQL APIs, Experience writing unit tests, Experience with React Testing Library or similar, Hands-on experience with E2E testing, Experience with Playwright or similar E2E tool, Proficiency with Git, Ability to work independently, Communicative English 📃 Skills: JavaScript, TypeScript, React, Next.js, HTML, CSS, Tailwind, Radix, shadcn, Storybook, Playwright, Vitest, Jest, ReactTestingLibrary, REST, GraphQL, Git, Turborepo, Yarn, TanStack, react-hook-form, Auth0, i18n, Claude, Cursor 🏢 Description: About us We build modern, high-quality web applications for the mobility sector using a clean TypeScript/React/Next.js monorepo. We keep our stack up to date and work with the latest stable versions of Next.js (App Router), React 19+, Tailwind, Playwright, GraphQL, and Storybook for component development and documentation. We also actively integrate AI tools into our daily workflow. You won’t have to deal with legacy code, outdated patterns, or old dependencies. Our team (8-10 people) maintains high standards through regular code reviews, 1:1 mentoring, and continuous refactoring and experimentation with new tools and practices. The frontend team is based in Poland, while the rest of the product team is in Sweden -so you’ll work closely with a local FE team while collaborating across the wider organisation. We’re looking for a proactive frontend developer with hands-on experience in React, who is comfortable writing tests (including E2E), and can work independently in a modern stack -while continuing to grow in a supportive, high-standard environment. 👉 You don’t need to tick every single box -if most of this sounds like you, we’d love to talk. Day-to-day responsibilities • Build new features and complex UI components using React / TypeScript / Next.js (App Router) • Develop and improve components within our shared design system (Tailwind + Radix / shadcn/ui), with documentation in Storybook • Write and maintain E2E tests in Playwright (an important part of the role) • Write unit and integration tests (Vitest + React Testing Library) • Work with REST / GraphQL APIs, debug issues across the stack, and participate in code reviews • Use AI coding assistants (Claude, Cursor, etc.) to speed up development and improve code quality Must-have requirements • Solid JavaScript / TypeScript skills -you write clean, type-safe code • Practical experience with React (commercial or strong personal projects) • Good understanding of HTML/CSS and responsive design • Experience working with REST and/or GraphQL APIs • Experience writing unit tests (e.g. Vitest / Jest + React Testing Library) • Some hands-on experience with E2E testing (Playwright or similar tools like Cypress) • Comfortable working with Git (branches, PRs, rebasing, code reviews) • Communicative English (written and spoken) • Ability to deliver working features independently Nice-to-have (not required, but a plus) • Experience with Next.js App Router in real-world projects • Monorepo experience (Turborepo, Yarn workspaces, etc.) • Familiarity with TanStack Router, react-hook-form, Auth0, or i18n solutions • Experience working with design systems or component libraries (Radix, shadcn/ui, Headless UI) • Storybook experience • Exposure to AI-assisted coding in real workflows What we offer • Work with a modern, up-to-date stack -no legacy code, no outdated libraries • 1:1 mentoring and thorough code reviews from experienced developers • A modern environment with room to experiment (including strong AI usage) • Real ownership over features and product areas • No crunch, flexible working hours, fully remote setup • Clear growth path -from feature/E2E contributor to broader frontend ownership

Technology

iTeamly

Senior React Developer

Senior

Remote

Krakow, Poland

23,000 - 32,500 PLN

🏢 Summary: Frontend-focused role developing and maintaining scalable React applications with TypeScript, integrated with Node.js backend services and data pipelines. The position involves building production-grade, data-driven solutions, contributing to architecture decisions, and optimizing complex UI workflows. It offers work on a high-impact product within a modern TypeScript and React ecosystem. 🗂️ Requirements: Strong proficiency in React, Strong proficiency in TypeScript, Experience building large-scale production applications, Experience with Node.js and API integrations, Experience with data-driven applications, Understanding of modern frontend architecture, Knowledge of testing practices, Ability to work in cross-functional teams 📃 Skills: React, TypeScript, Node.js, APIs, Microservices, Snowflake, Testing, Architecture, Data, Pipelines 🏢 Description: ✅ Your responsibilities: Develop and maintain scalable React applications with TypeScript across the full frontend stack Collaborate closely with backend engineers, data teams, and product managers to deliver high-quality solutions Ensure type safety, code quality, and maintainability throughout the application Participate in design and architecture discussions, proposing improvements to frontend patterns and integrations Troubleshoot and optimize complex UI and data-intensive workflows Support knowledge sharing and mentor junior developers when needed 🧠 Our requirements: Strong proficiency in React and TypeScript , with experience building large-scale, production-grade applications Familiarity with Node.js backend development and integration with APIs or microservices Experience working with data-driven applications , ideally with Snowflake, data lakes, or pipelines Solid understanding of modern frontend architecture, testing, and best practices Ability to communicate effectively in a cross-functional, high-stakes environment Proactive, self-motivated, and capable of delivering high-quality solutions under tight timelines 🌟 What we offer: Opportunity to work on a premium, high-profile product with global business impact Exposure to a modern TypeScript/React ecosystem, integrated with backend Node.js services and advanced data pipelines Collaborative environment with experienced engineers and product leaders Career growth and technical mentorship in a cross-functional team Competitive employment package and benefits.