> Markdown version of [/jobs/ext/4654952-senior-software-engineer-y-combinator-startup](https://www.wearedevelopers.com/jobs/ext/4654952-senior-software-engineer-y-combinator-startup). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer (Y Combinator Startup) - **Company:** CoCrafter - **Location:** München, Germany - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Automation of Tests, Cloud Computing, Databases, Continuous Integration, PostgreSQL, Node.Js, Next.js, TypeScript, Information Technology, NestJS, Docker - **Published:** November 10, 2026 - **Apply:** https://www.adzuna.de/details/5959909227 ## About the Role A computer science or related degree; experience taking a product or system through substantial growth; several years in backend engineering; and strong database, cloud infrastructure, performance, CI/CD and observability knowledge. TypeScript and Node.js experience is preferred. The stack includes NestJS, PostgreSQL, Next.js, Docker and AWS. Excellent German or English is required; German is a plus. ## Description CoCrafter builds software for managing construction subcontractors. This permanent, full-time Senior Software Engineer role is on-site in Munich, Maxvorstadt. The work Work directly with the CTO to scale architecture and performance, improve CI/CD and automated testing, ship features, establish observability and security standards, mentor engineers through reviews and pairing, and document technical decisions.