What we're looking for

5+ years of experience as a frontend engineer
Expertise in React.js, Next.js, and modern JavaScript/TypeScript
Proven experience building products in fast-scaling startups or scale-ups
Location: Warsaw preferred; exceptional EU-based remote candidates considered

About the role

We’re looking for a Senior Frontend Developer who thrives in high-growth environments. Someone who can take ownership of the frontend, turn complex ideas into elegant, user-friendly interfaces, and ensure our products evolve in step with rapid business and revenue growth.

What You’ll Do:
- Lead the frontend: Architect, build, and optimize user-facing applications with React/Next.js and modern tooling.
- Own UX/UI quality: Collaborate with product and design to deliver intuitive, high-performance experiences.
- Performance focus: Ensure apps remain fast, scalable, and reliable as adoption grows.
- Integration: Partner with backend and AI/ML engineers to build seamless end-to-end functionality.
- Best practices: Champion clean code, testing, and maintainability across the frontend team.
- Mentorship: Share expertise and support less senior developers, raising the overall bar.

Compensation & benefits

Competitive salary up to €120,000 annually

Strong compensation package

Future opportunities for equity participation

Leadership growth opportunities

Equity details

Details: Future opportunities for equity participation and leadership growth.

About ZetaLabs [MIRROR]

ZetaLabs is a fast-growing startup building next-generation AI-driven products. Backed by significant investment, we’re scaling fast and need exceptional engineers to help us deliver seamless, high-performing user experiences.

Team

Collaborate with top-tier engineers who have scaled companies like Personio and Granola.

Senior Frontend Developer