AI Engineer

Role details

ABOUT THE ROLE This is a hands-on engineering role at an early-stage, Y Combinator–backed AI productivity startup. You'll tackle two of the team's most critical technical challenges — backend scalability and LLM/AI agent flow optimization — in ways that directly shape platform performance and user experience. WHAT YOU'LL DO - Design and implement backend systems and services built to operate at scale. - Tune and iterate on LLM integrations and AI agent orchestration to improve reliability and efficiency. - Own end-to-end technical challenges across the stack, from architecture decisions to shipping production code. - Collaborate closely within a small, fast-moving engineering team where your contributions have immediate impact. WHAT WE'RE LOOKING FOR - 5+ years of backend software engineering experience delivering scalable systems in production. - Hands-on experience optimizing LLMs and AI agent workflows in live production environments. - Proven track record of shipping software over time; practical experience is valued over formal credentials. - Experience working at fast-growing startups; a startup-motivated mindset is essential. - Strong side-project portfolio demonstrating technical depth and sustained curiosity. - High agency, clear ownership, and intentional career choices that reflect genuine commitment to craft. - Based in Stockholm or legally eligible to work and relocate to Stockholm (visa sponsorship is not available). COMPENSATION & BENEFITS Salary range: $80,000–$120,000 USD annually, plus equity. Flexibility exists for exceptionally senior candidates, with a negotiable salary/equity mix. Visa sponsorship is not available. LOCATION On-site in Stockholm, Sweden. Candidates must be based in or able to relocate to Stockholm and hold the right to work in Sweden.