Top Front End Developer Jobs in Krakow

Lead design and implement agentic AI systems: integrate services and models, optimize and fine-tune LLMs (LoRA/QLoRA), build datasets and evaluations, run experiments to improve reliability, cost, and latency for production workflows.

Lead frontend architecture and development of shared UI infrastructure, design systems, and micro frontend strategies using React and TypeScript. Partner with architects, product, UX, and engineering leaders to deliver scalable, accessible, performant interfaces. Establish testing, CI/CD, versioning, and documentation standards; mentor engineers; conduct architectural reviews; and explore AI-enhanced UI/UX capabilities across a cloud-native platform.

Develop user interfaces for mission-critical operations, focusing on map-driven web applications for monitoring and predicting flight trajectories.

Own complex frontend features from concept through production using Angular or another major framework. Design scalable architectures, build high-performance data-intensive interfaces, collaborate cross-functionally, and make product and technical decisions. Write tested production-ready code, improve engineering practices, review code, mentor engineers, and use AI-assisted development effectively.

As a Senior Frontend Developer, you will work with React and Angular, manage a frontend team, mentor juniors, and design architecture while focusing on testing and quality assurance.

Lead a cross-functional team of frontend and backend engineers building scalable consumer experiences across mobile and client platforms. Own end-to-end UX delivery, partner with Product and Design, uphold engineering standards, improve usability and performance, mentor engineers, and strengthen agile delivery using metrics such as DORA and cycle time.

Lead frontend development for the Entitlements platform, owning full SDLC. Design scalable, secure systems, mentor engineers, integrate with backend microservices, and advance LLM-based assistants and personalization using OpenAI/ML models.

The Frontend Developer will work on diverse projects using ReactJS and related technologies, contributing to agile development and team collaboration.

Seeking a Frontend Developer with 2+ years experience, proficient in React, JavaScript, and Node.js, with strong communication skills.

Develop and deliver innovative HR Tech SaaS solutions, collaborate with product teams, participate in Agile practices, mentor peers, and ensure high-quality standards.

Design, architect, implement, and maintain React and TypeScript web applications. Develop responsive HTML/CSS pages and email templates optimized for SEO and Core Web Vitals. Write unit and integration tests, solve technical challenges, collaborate with the team, and take ownership of project delivery. Preferred experience includes Redux, React Query, Jest, Cypress, and SSR/SSG frameworks such as Next.js, Astro, or Remix.

Lead technical execution for a frontend team building an enterprise low-code platform: implement and review code, define testing and AI-first workflows, enforce quality standards, mentor engineers, drive CI/CD and developer experience improvements, coordinate integrations, and manage technical debt and planning inputs.

Build responsive, high-performance frontend applications for AI-driven enterprise solutions. Develop reusable components using modern frameworks, integrate REST APIs, WebSockets, and real-time streaming responses, optimize performance and state management, apply WCAG accessibility standards, write component-level tests, establish frontend engineering patterns, and collaborate with UX, backend, platform, and AI engineering teams.

Design, build, and maintain consumer-facing features across web (React) and mobile (React Native). Own product lifecycle from discovery through release, monitoring, experimentation, and iteration. Drive A/B testing and feature-flag strategies, make architectural decisions, ensure accessibility/performance/testability, mentor engineers, and collaborate with Product, Design, Data, and Platform teams.

Own complex frontend features across web and mobile, design React and React Native systems, improve rendering and runtime performance, and build reusable abstractions. Collaborate with product, backend, and QA teams to deliver simple user experiences. Maintain quality through code reviews and unit, end-to-end, and visual-regression testing. Mentor colleagues and help raise frontend engineering standards.

Shape frontend architecture and engineering direction across React, React Native, and shared monorepo teams. Own platform capabilities, shared libraries, design-system foundations, developer tooling, performance, testing, migrations, and developer experience. Diagnose systemic web and mobile issues, remain hands-on with implementation and technical investigation, influence cross-team decisions, partner with product and QA, and mentor senior engineers. This is an individual contributor role focused on sustained organizational impact rather than people management.

The Frontend Developer will create high-quality game front-ends using TypeScript and React, enhancing existing features and ensuring performance while collaborating with the development team.

Lead design and implementation of complex frontend and platform capabilities. Build and maintain shared UI components and design systems, drive modernization and AI-assisted development, improve quality, accessibility, security, and performance, mentor engineers, influence architecture and technical direction, and create internal developer productivity and AI-powered tooling.

Build and modernize Productboard’s frontend platform, migrating its legacy design system to Spark UI. Design AI-ready module boundaries, API contracts, documentation, and agent workflows involving tool use and autonomous execution. Develop high-performance React applications, validate experiments with users, collaborate with product and design teams, own features through production, mentor engineers, and share engineering knowledge across the organization.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Design and implement complex customer-facing frontend features using TypeScript and React. Provide technical leadership, mentor junior engineers, drive frontend architecture and best practices, improve performance and accessibility, partner with product/design, integrate with backend APIs, and manage technical debt and scalability.

Develop modern mobile applications using React Native and TypeScript, optimize performance, conduct testing, and collaborate within Agile teams.

Lead front-end BI strategy, develop advanced Power BI solutions, manage data models and security, integrate AI features, and collaborate with stakeholders.

Develop and maintain React and Next.js web applications for mobile and desktop. Responsibilities include improving performance, quality, responsiveness, security, and code reliability; troubleshooting bugs and bottlenecks; developing distributed microservices and REST APIs; participating in agile scrums; collaborating with cross-functional and offshore teams; testing applications; and sharing technical knowledge through workshops.

Develop and maintain high-quality React and Next.js applications for mobile and desktop. Responsibilities include writing reusable code, optimizing performance, troubleshooting bugs, collaborating with cross-functional and offshore teams, participating in Agile ceremonies, maintaining code quality, testing applications, and sharing technical knowledge. The role requires strong JavaScript and TypeScript expertise, web security and performance knowledge, distributed microservices experience, cloud development, responsive design, and modern frontend testing practices.