Founding, Full Stack Engineer (React.js & Python)

ph3bFull Stack Engineer (React.js, TypeScript, Python) /b – YC AI Scale-up – Amsterdam, NL /h3 pbExperience: /b 3+ years – React.js, TypeScript, Pythonbr/bEmployment type: /b Full‑Time /p h3Job Overview /h3 pOur client develops AI sales employees for Europe. Their first product is an AI SDR that owns the entire outbound process – from researching relevant companies to executing campaigns on email, LinkedIn, and via letters. We are seeking a highly skilled and proactive founding software engineer to join our YC‑backed startup full‑time and in person in Amsterdam.

This is a fantastic opportunity to make a substantial impact in a fast‑paced, early‑stage startup environment. /p h3Responsibilities /h3 ul liOwn and develop core product features on both the frontend and backend. /li liCollaborate with founders and customers to conceptualise, design and implement new features. /li liMaintain and improve the codebase for optimal performance. /li liConduct code reviews and perform debugging tasks. /li /ul h3Required Qualifications /h3 ul liProven track record in full‑stack development, preferably as a Senior Software Engineer. /li liComprehensive knowledge of TypeScript, React, and server‑side development (preferably Remix). /li liProficiency in designing multi‑tenancy SaaS products. /li liExperience leveraging latest AI code IDEs (Cursor, Windsurf, Claude, IntelliJ, Junie). /li liExperience operating software in a scalable manner. /li liFluent in English; able to communicate complex technical concepts clearly and effectively. /li /ul h3Bonus Skills and Experience /h3 ul liProficiency in Python. /li liExperience hosting applications on Azure. /li /ul h3Application /h3 pSubmit a copy of your CV directly to this advertisement or email . This role is actively interviewing and can be offered within 7‑10 days. /p h3Location /h3 pAmsterdam, North Holland, Netherlands – On‑site role. /p /p