Senior Full Stack Engineer (w/m/d)
About this role
SelectCode is hiring a Senior Full Stack Engineer to help scale an AI platform that already serves 100k+ users across 250+ companies toward 1M users. You will join a product-focused engineering team building secure, scalable systems and intuitive UX to bring AI to the core of the SME sector.
What you'll do
- Own the most complex architectural problems across the platform, such as multi‑terabyte data synchronization and secure sandbox infrastructure.
- Architect, build, and ship high‑quality full‑stack features using React and TypeScript with a focus on long‑term scalability and UX.
- Design and implement systems to synchronize and index terabytes of client data while enforcing permissions.
- Build infrastructure to process millions of LLM calls per month with high reliability and security.
- Implement scalable, secure code sandbox solutions that can spawn thousands of sandboxes per day.
- Create base infrastructure and tooling for fast custom integrations so new systems can be connected in hours.
- Collaborate on technical roadmaps and align on architectural decisions with the development team.
- Debug production incidents, identify root causes, and implement durable fixes to keep the platform stable.
- Mentor junior colleagues and improve the codebase through constructive, thorough code reviews.
- Continuously improve development processes, code quality standards, and team performance.
What SelectCode is looking for
- 7+ years of professional software engineering experience working with React, TypeScript, PostgreSQL, and the surrounding ecosystem (Docker, CI/CD).
- Proven experience designing, scaling, and maintaining complex software architectures for high‑growth products.
- Hands‑on experience with core stack technologies including tRPC, Kubernetes, Docker, and modern frontend tooling.
- Experience operating at scale: synchronizing large datasets, handling high volumes of LLM/API calls, and building secure multi‑tenant systems.
- Strong sense of product ownership with attention to user experience and long‑term product success.
- A passion for mentoring engineers and actively shaping engineering standards and processes.
- Comfortable learning quickly and working in a fast‑paced, high‑growth environment.
Company at a glance
SelectCode GmbH is an AI partner and product studio focused on bringing AI to the midmarket with a central all-in-one platform that makes AI accessible and easy to use; it is in growth mode, targeting ARR from €1M to €10M.
Top Benefits
- Ein jährliches Weiterbildungsbudget von 1.000 €.
- Zugang zu über 10.000 Sportstätten mit dem EGYM Wellpass.
- Das Deutschlandticket.
What happens next
Skip the application pile. I get you in front of the people who decide.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
When the company wants to meet, I get the call on your calendar. You just show up.
Culture & values
Flexible Arbeitszeiten mit Option auf 2 Tage/Woche im Homeoffice.
Bei uns wird nicht endlos diskutiert – wir packen an und setzen um.
Wir kommunizieren offen, direkt und auf Augenhöhe – über Erfolge genauso wie über Fehler.
Wir nutzen KI intensiv, bleiben aber selbst verantwortlich für unsere Ergebnisse.
Wir haben große Ziele, legen aber Wert auf eine gesunde Arbeitsumgebung und achten aufeinander, um als Team nachhaltig erfolgreich zu sein.
Wir fördern Lernen durch interaktive KI-Workshops und Lernplattformen, damit Kunden KI eigenständig effektiv einsetzen können.
Wir übersetzen Kundenfeedback in umsetzbare Impulse für Produkt- und Engineering-Teams.
Wir arbeiten eng über funktionsübergreifende Teams (Engineering, Sales, Produkt) zusammen, um Kundenprobleme zu lösen.
Wir arbeiten direkt an realen GenAI-Use-Cases unserer Kunden und lernen dadurch schnell, wie man KI effektiv einsetzt.
Know someone who'd be great for this?
