Senior Fullstack Engineer (AI)

Company

Founded in Berlin, autarc is a ~40 person start-up who were part of Y Combinator’s S24 batch in San Francisco. Our team consists of people in Sales, Tech and Operations, with the Engineering & Product department currently ~20 people, as we continue to grow throughout the year.

Role description

This role is to join our AI team, where you will ship production AI features end-to-end across web/mobile clients and Backend services. This is an applied AI Engineering role: integrating modern models into reliable product workflows, not training models from scratch. 

You will work on features such as Computer Vision workflows for energy installers, voice agents, AI-powered automations and help scale new Backend services being built in Go. Further responsibilities include building and owning AI-powered product features from UI to Backend, integrating LLM and multimodal API's (OpenAI, Anthropic, Mistral etc.) with structure outputs, guardrails and prompt/version management. 

Other responsibilities include:

• Develop and maintain Backend services in Typescript and Go
• Build reliable async flows (webhooks, retries, idempotency, failure handling)
• Build CV/image/document analysis pipelines used in real installer workflows
• Ship product-quality UX in React/Tailwind where needed, in close collaboration with Design
• Instrument features with logs/metrics/tracing and improve reliability 
• Contribute to testing strategy across Frontend and Backend

The role is Fullstack, with a 40/60 split between Frontend & Backend.

Requirements

• 5+ years of professional experience in building SaaS
• Hands-on experience integrating LLM/multimodal APIs into production systems
• Strong Fullstack experience with TypeScript, React, Node and ideally NestJS
• Professional experience working Go and readiness to own new Go endpoints/services 
• Solid SQL/Postgres skills and familiarity with object storage 
• Product mindset: you can turn ambiguous requirements into stable, user-facing features
• Based in Berlin with a willingness to work 3 days hybrid (office in Mitte)  
• Fluent in English (German is a plus)

What we offer

• Freedom to choose your own equipment (within a budget)
• 26 paid vacation days
• An annual team retreat 
• The choice between Dance or JobRad for mobility 
• The choice between Classpass or Urban Sports Club for fitness
• Regular team events, lunches and activities

Next steps

If your application is successful, you will participate in the following:

• Screening call with Louis (Recruiter)
• Culture fit call with a Senior Engineer
• Pair programming/live coding exercise 
• Final on-site interview with Marius (CTO) and the team