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Open nowPosted 96 days ago

Founding AI Engineer

5u-ai6 open roles

Where
Munich, Germany
Work mode
On site
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Your applicationOpen nowFounding AI Engineer5u-ai · Munich, Germany

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The clock on this job

Early applications get read.

12.1% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.5%3 days
  3. 12.1%7 days
  4. 19.1%14 days
  5. 35.6%30 days
  6. 52.7%60 days
This job: posted 96 days ago

The posting

The Role

Work directly with the founding team to define and build the technical foundation behind our AI Workers. These systems operate inside live logistics workflows across email, telephony, and enterprise software, where reliability matters and edge cases are the product.

You will own the hard parts underneath the features: agent architecture, context and state, evaluations, observability, execution reliability, data flows, and the platform other engineers build on.

This is a hands-on role. You will write production code every day, but your job is bigger than shipping a backlog. You will decide which abstractions survive, where we need rigor, what we build next, and how the engineering team operates as we grow.

This is not a research-only role, and it is not an architecture role where you stop coding. You build, ship, measure, fix, and keep raising the bar.

What You'll Do

  • Own the architecture and evolution of the core AI Worker platform across backend services, agent workflows, integrations, data, and infrastructure.
  • Build reliable, long-running AI workflows that make decisions and take action across inboxes, phone calls, TMS, ERP, EDI, SFTP, APIs, and event queues.
  • Develop the systems that make agents dependable in production: evaluations, tracing, feedback loops, guardrails, retries, fallbacks, and human escalation.
  • Work through the difficult parts of applied AI: ambiguous inputs, changing context, tool use, state management, latency, cost, and failure recovery.
  • Turn patterns from customer deployments into reusable product capabilities instead of one-off fixes.
  • Make deliberate technical tradeoffs between speed and durability. Ship the simple version first, then know when the system needs to be rebuilt properly.
  • Shape product and technical direction with the founders. Challenge assumptions, propose better approaches, and own decisions through production.
  • Help set the engineering standard for the company, from system design and code quality to how we use AI tools to build faster.
  • Help hire and develop the engineering team as we grow.

Who You Are

  • You take ownership of unclear, important problems. You do not wait for a ticket, a complete spec, or someone else to define the path.
  • You have strong technical judgment. You can simplify a system without being careless, and add structure without slowing everyone down.
  • You think like a product builder, not only an engineer. You care whether the system solves the real operational problem, not whether the implementation looks clever.
  • You move fast and iterate constantly, but you do not hide behind prototypes when customers depend on the system.
  • You build with AI, not just around it. AI-native development is how you think and work.
  • You are low ego and direct. You can disagree clearly, change your mind quickly, and make the best argument win.
  • You are comfortable being close to customers, production incidents, and the messy details of logistics operations.
  • You want to be in the room. Munich office, in person. This is not a remote role or a 9-to-5.

What You Bring

  • Strong software engineering fundamentals: Python, JavaScript/TypeScript, SQL, REST APIs, data modeling, and system design.
  • Experience owning production systems across architecture, implementation, deployment, and operations.
  • Hands-on experience with LLM systems in production: agent workflows, tool use, prompt engineering, structured outputs, context management, evaluations, and observability.
  • Strong understanding of distributed and asynchronous systems, including queues, retries, idempotency, concurrency, background jobs, and failure handling.
  • Experience with Docker, CI/CD, cloud infrastructure, monitoring, and production incident debugging.
  • A track record of shipping products or systems that real users depend on.
  • Bonus: experience with enterprise integrations, voice systems, email automation, logistics, supply chain, or freight.

Process

We move fast. Expect a decision within one week.

Application. Send your CV and the one thing we care about most: an AI coding session. A transcript or log from Claude Code, Cursor, Codex, or whatever tool you build with. It can be .md, .txt, several sessions, or a hosted link. We want to see how you actually work.

Online interview. One conversation covering technical depth, product judgment, ownership, and team fit. No multi-round gauntlet.

Technical session (60 min). Build a small service from scratch with an AI assistant that we provide. We watch how you work, then you walk us through your decisions.

Founder session. A direct conversation about how you think, what you want to build, and the level of ownership you want to take.

Decision. Feedback and a potential start within one week.

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