> Markdown version of [/jobs/ext/3169463-founding-full-stack-engineer](https://www.wearedevelopers.com/jobs/ext/3169463-founding-full-stack-engineer). 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). --- # Founding Full-Stack Engineer - **Company:** Instaffo GmbH - **Location:** München, Germany - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Database Design, Open Source Technology, Query Optimization, Next.js, TypeScript, ReactJS, Rate Limiting, Api Design, Restful APIs - **Published:** September 10, 2026 - **Apply:** https://www.adzuna.de/details/5877201064 ## About the Role You reason from user pain to solution to measurable outcome, and you can sit across from a non-technical customer and understand how they actually work. You're a strong full-stack engineer. You build complex, performant frontends in TypeScript and React/Next.js and the backend APIs behind them, and you have real instincts for database design and query optimization, because construction data is deeply interconnected. You prototype fast and measure everything. You also care about reliability, because on a live construction project, wrong has consequences. Level is open. We've watched new grads outrun staff engineers and the other way around. If you're exceptional, we'll build the scope around you. Nice to have, not required: comfort integrating AI features even if you don't build the models yourself, strong open-source work, an earlier stint as an early employee at a startup, domain depth in construction or complex B2B workflows, or a good eye for design so you can build clean interfaces without detailed mockups. We work in English. German helps for customer calls but isn't required. We have native speakers for that. The offer You'll be one of our first engineers, which means you own critical parts of the product end to end and work directly with the founders. It's early enough that you help decide how the company works, and the path from here goes to either top individual contributor or VP Engineering, depending on where you're strongest. Equity: 0.5% to 1.5%, four-year vest, 1.5-year cliff. Hybrid: three days a week in our central Munich office. If that's a dealbreaker for you, let's talk. Requirements This role suits a full-stack engineer who wants to join at the earliest stage and build a product that changes how an entire industry works. Must-haves * Strong full-stack in TypeScript and React/Next.js. You build complex, performant frontends and the backend APIs behind them. * Database design and optimization. You've designed schemas, optimized queries, and worked with complex data relationships. Construction data is deeply interconnected. * API design. You've built and consumed REST APIs, handled auth and rate limiting, and designed interfaces that scale with the product. * Product sense. You reason from user pain to solution to measurable outcome, and you can talk to non-technical customers and understand their workflows. * Startup pace with judgment. You turn feedback into shipped features fast and make pragmatic architecture calls, but you care about reliability because wrong has consequences on a live construction project. Nice-to-haves * Comfort integrating AI features, even if you don't build the models yourself. * Startup experience, ideally as an early employee with a broad remit. * Domain depth in construction, manufacturing, or complex B2B workflows. * Design sense. You can build a clean, usable interface without detailed mockups. * Open-source work or writing you're proud of. * German for customer conversations. Not required, we have native speakers for that. ## Related Videos - [Do TypeScript without TypeScript](https://www.wearedevelopers.com/videos/327-do-typescript-without-typescript) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [Navigating Growth, Scaling Challenges, and Office Expansions with David Singleton, CTO at Stripe](https://www.wearedevelopers.com/videos/100362-navigating-growth-scaling-challenges-and-office-expansions-with-david-singleton-cto-at-stripe) - [The Art and Craft of Type Development](https://www.wearedevelopers.com/videos/81-the-art-and-craft-of-type-development) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) ## Related Articles - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Fullstack developer salary in Germany [2023]](https://www.wearedevelopers.com/magazine/197-fullstack-developer-salary-in-germany-2023) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)