Top Front End Developer Jobs in Warsaw

Design and evolve public REST and streaming APIs (OpenAPI), implement production frontend in React+TypeScript, integrate 3D glTF assets via three.js/react-three-fiber, build typed clients, runtime validation, mocks and contract tests, ensure streaming UI resilience, and collaborate with partners and designers on API and UX.

Build and ship frontend features for checkout and merchant dashboard using React and TypeScript, deploy to production, collaborate with Design, contribute to Python backend when useful, and participate in architecture and quality-focused engineering practices.

Lead front-end technical strategy across multiple teams for a complex, data-dense merchant platform. Own architecture, component systems, state management, performance, accessibility, and front-end observability. Mentor engineers, drive cross-team alignment, and partner with Product, Design, and backend engineers to deliver a cohesive merchant experience including the Primer AI Companion.

Build and own merchant-facing frontend projects end-to-end. Lead frontend architecture, produce RFCs/ADRs, create composable performant accessible UI, monitor production impact, respond to incidents, and mentor engineers while ensuring high code quality and measurable outcomes.

Join Cerebras Systems to optimize and develop frontend compiler infrastructure for PyTorch models on their unique wafer-scale AI platform, focusing on model representation and optimization.

Design and evolve frontend platform primitives for a canvas-based workflow builder, improve real-time collaboration, optimize rendering and performance, own architecture and modularization, drive RFCs, mentor peers, and collaborate cross-functionally to enable scalable, high-performance user experiences across cloud and self-hosted deployments.

Freelance frontend developer to build web (React) and mobile (Flutter) apps, create and maintain component libraries/design systems, implement AI-ready code architecture and documentation, work within CI/CD workflows, and collaborate remotely with English communication.

Join Primer's Growth team to build self-serve merchant onboarding features. Ship React frontend dashboard work, deploy to production, monitor impact, collaborate with Design, and contribute to Python backend code when needed.

Maintain and enhance a mature financial CRM, advisory support platform, and client portal. Extend and customize features, debug business processes, resolve production issues, and contribute to product evolution while collaborating with a German-speaking team.

Lead technical strategy for scalable CMS applications, optimize frontend infrastructure, oversee code quality, and enhance team productivity in a gaming-focused environment.

Own and evolve the marketing website platform: design Sanity content schemas, build Astro components and design-token-driven UI, ensure accessibility (WCAG 2.2 AA), SEO, localization and performance, extend tooling for AI-assisted composition, and ship end-to-end features from schema to production.

Build and ship intuitive frontend features for Aurora's Physical Design CAD and 3D canvas. Collaborate with product, design, and backend engineers to design, implement, test, and support production features. Improve frontend architecture, tooling, and reliability, participate in on-call rotation, and mentor peers.

Design and maintain a modular, high-performance frontend: implement a pixel-perfect design system, optimize rendering and bundle sizes, architect client-side state for real-time data, integrate complex APIs, and ensure global availability and operational readiness for a Web3 consumer platform.

The Senior Frontend Engineer will lead custom Shopify theme development, ensuring high-quality code and guiding team members in project execution.

Hands-on senior frontend engineer responsible for building and owning production-grade React/TypeScript UIs from Figma. Ship responsive, mobile-first features, complex forms, and tests; optimize performance and bundle size; define component patterns and frontend architecture; collaborate with Product, Design, and Backend; mentor juniors and maintain high quality standards in an AI-assisted remote workflow.

Build and maintain high-performance Next.js/React TypeScript applications integrated with Headless WordPress. Develop reusable UI components, optimize frontend performance and SEO, ensure accessibility and responsive design, collaborate with Product/Design/Backend, integrate third-party services, and leverage AI tools to improve productivity.

Own and build the frontend for Alternative Payment Methods: create and maintain SPAs for Hub and Olimp, integrate new APMs into the payment form, improve merchant UI/UX, collaborate with Go backend engineers on Buf/Connect RPC contracts, and establish frontend patterns, tooling, and review practices for the team.

Lead front-end engineer on the Mapper Team building scalable data-visualization and real-time multi-user front-end features. Own end-to-end projects, contribute to architecture and processes, mentor peers, participate in hiring, and deliver high-performance, testable, maintainable UI code.

Build and maintain responsive, high-performance user interfaces using React and modern front-end technologies. Translate UI/UX designs into reusable code, integrate with backend APIs, optimize performance and cross-browser compatibility, and contribute to testing, code reviews, and engineering best practices in a product-driven, remote environment.

As a Senior Frontend Engineer, you will design and implement sophisticated user interfaces, collaborate with teams, integrate with APIs, and contribute to workshops, all within an Agile framework.

The role involves developing high-quality Vue.js applications, creating interactions, collaborating with back-end engineers, and writing tests.

The Frontend Engineer will develop a graphic interface for a SaaS simulation platform, requiring strong software engineering skills and proficiency in Angular, HTML, and CSS.

Serve as a senior Java full-stack engineer building and maintaining backend services for blockchain applications, integrate APIs with React/Vue frontends, design scalable enterprise blockchain solutions, troubleshoot complex backend issues, and collaborate with cross-functional teams to apply best practices.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

Build and ship full-stack features for North, develop autonomous agents that access sensitive enterprise data, productionize state-of-the-art models, write minimal, secure low-resource code, and collaborate with researchers to deploy performant RAG/agentic applications while prioritizing security and user experience.