Senior Frontend Engineer

About us Cobalt Streamworks is a specialist IT recruitment agency delivering top engineers across Poland and Europe 🇪🇺. We combine experienced recruiters with autonomous AI agents and an obsessive focus on quality — sourcing 24/7 across LinkedIn, GitHub, and beyond to reach engineers who aren't actively job hunting but are open to the right move. We don't flood you with CVs. We get to know each candidate's skills, values, and goals, then send only the best-matched people — and we stay close through onboarding and the first months to make sure the placement lasts. About the role You'll be a senior voice on the frontend, working hand in hand with the product and shaping where it goes next. This is legal tech in the AI agents space, and the team is squarely in scaling mode — so the bar is high: clean, dependable code, shipped fast, with AI tools like Claude Code and Cursor part of how you work every day. What you'll do Build and maintain interfaces people actually enjoy using — designing, developing, and refining them Work across teams, partnering closely with designers, product managers, and backend engineers Take full ownership of your craft: code quality, maintainability, and the overall shape of the frontend codebase Move fast and experiment boldly, with a real say in how the platform evolves Must-have Excellent English communication (C1+) Experience building scalable, robust applications within (or close to) the stack Up for the pace of a dynamic, international startup Tech stack React, TypeScript, Next.js, Tailwind CSS, shadcn/ui, Zustand