Senior AI / LLM Engineer – Agent Developer (m/f/d) ב-Blocks · Trevo

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Agent building: You have shipped a production LLM assistant/agent that calls tools, pulls internal data, and returns structured, accurate answers (not just a demo), using OpenAI / Claude / Gemini style function-calling + ReAct/agent frameworks (LangChain / LangGraph / Pydantic AI)
RAG pipelines: You have built retrieval / RAG pipelines over proprietary data: embeddings, vector DB, metadata filtering, summarization / context window management
Agent evaluation: You have versioned and evaluated prompts and tool policies like code: regression tests, hallucination/accuracy checks, FinOps-style reasoning (“why did spend spike?“), offline eval / tracing stack (e.g. LangSmith
Infrastructure: You have leveraged MCP-style tool server / function-calling layer to expose internal cost + usage data
Startup execution mindset: You have shipped 0→1 products fast with high ownership, autonomy, and accountability
Curious, pragmatic problem solver: You experiment quickly, learn deeply, and optimise for impact over theory
Direct communicator: You value clarity and feedback as tools for speed, improvement, and alignment
Demonstrated impact: You have impressive achievements from previous jobs and from side projects. Please share them with us.
What we offer
Build where AI actually matters. Real AI shipped into production that changes how companies run cloud infrastructure.
Work with founders who’ve done it before. Unicorn builders, $1B+ raised, zero politics, fast calls, radical candor. We move, not debate.
Zero to One. The opportunity to build a product which startups will consider standard infrastructure.
Real ownership, not theater. We challenge, you make calls. Some will be wrong. That’s fine. We fix fast and keep shipping.
Compensation that reflects ambition. Top market cash compensation plus meaningful equity upside.
Berlin, in person, by design. Early stage companies are built together, not on Zoom. We support relocation.
How we hire
We believe hiring should be like we build: Fast, respecting your time and ours, to the point:
Intro call with a founding team member (30 min)
Tech interview/assessment with an engineer (~60 min)
In-person tech case study with founders and engineers (1-2 hours)
Offer call within 24 hours with a founder (15 min)

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