Staff AI Engineer — Agent Platform (all genders)

wingmaite GmbH; Berlin; Hybrid; EUR 110,000 - 170,000; Full time

Benefits offered by this job

Flexible remote setup

Learning & development opportunities

Generous vacation & workation budget

Technical ownership of the platform

Job summary

wingmaite GmbH in Berlin is seeking a Staff engineer to own the technical quality and direction of our agent platform. You’ll build features end to end, from the agent into the backend, and work closely with our CTO as a technical sparring partner.

You design multi-step, tool-using LLM agents, connect them to company knowledge, and ensure reliability, observability, and scalable architecture. This role emphasizes strong backend work, collaboration with design and product, and technical

Qualifications

• Shipped multi-step, tool-using LLM agents to production (LangGraph or similar).
• Know when sub-agents help, how to build evals, and why retrieval fails.
• Fluent in Python and productive in TypeScript/Node (NestJS is a plus).
• PostgreSQL and data modeling.
• You use AI coding tools such as Claude Code every day.
• You write clear specs and can explain trade-offs to people who aren't engineers.
• Fluent English (C1–C2).

Responsibilities

• Design the agents: Decide how our agents plan, use tools and handle multi-step work, and where people need to step in. Build reusable components so each new use case doesn't need its own system.
• Connect agents to company knowledge: Build how that knowledge reaches the agents, together with the people who decide what it should contain.
• Make answers reliable: Agents should be correct, cite their sources, show people only what they're allowed to see, and know when not to act.
• Track quality: Build evals, monitor quality and cost, and keep our model choices up to date.
• Ship end to end: Build features from the agent through to the backend yourself.
• Keep the architecture consistent: Set the patterns others build on, document decisions, keep specs current, and review designs with engineering, product and design.

Skills

Python

TypeScript/Node

PostgreSQL

LangGraph

Claude Code

English (C1–C2)

Tools

NestJS

AWS Bedrock

Vertex AI

Job description

wingmaite captures the knowledge companies never write down: who decides what, how work actually gets done, and why decisions were made. Our AI agents use that knowledge to answer questions and get work done.

We're looking for a Staff engineer to own the technical quality and direction of our agent platform. You'll build features end to end, from the agent into the backend. You won't manage people. You'll work closely with our CTO as a technical sparring partner.

What You'll Do

• Design the agents: Decide how our agents plan, use tools and handle multi-step work, and where people need to step in. Build reusable components so each new use case doesn't need its own system.

• Connect agents to company knowledge: Build how that knowledge reaches the agents, together with the people who decide what it should contain.

• Make answers reliable: Agents should be correct, cite their sources, show people only what they're allowed to see, and know when not to act.

• Track quality: Build evals, monitor quality and cost, and keep our model choices up to date.

• Ship end to end: Build features from the agent through to the backend yourself.

• Keep the architecture consistent: Set the patterns others build on, document decisions, keep specs current, and review designs with engineering, product and design.

How We Work

We build features as one team: design, product, engineering and AI together, from the first idea to production. You'll help shape a feature while it's still a problem and stay with it until it works for users. Agents depend on the knowledge behind them, so we build both as one system. We write decisions down and discuss disagreements openly.

What This Role Is Not

A management role, a prompt-engineering role, or an infrastructure or security role.

What We're Looking For

Must-Haves

• You've shipped multi-step, tool-using LLM agents to production (LangGraph or similar)

• You know when sub-agents help, how to build good evals, and why retrieval fails

• Fluent in Python and productive in TypeScript/Node (NestJS is a plus)

• PostgreSQL and data modeling

• You use AI coding tools such as Claude Code every day

• You write clear specs and can explain trade-offs to people who aren't engineers

• Fluent English (C1–C2)

Nice-to-Haves

None of these are required, but they'll help you get up to speed faster:

• You've connected agents to tools and data through MCP

• You've worked with knowledge graphs or other ways of modeling how people, work and information relate

• You've run models in production on AWS Bedrock or Vertex AI

• You've traced and debugged agents with LLM observability tools such as Langfuse

• You speak German

Who You Are

• You've set technical direction beyond your own work, and others build on your patterns

• You start from what users need and what could go wrong, then choose the tools

• You care whether the system still makes sense in a year

• You're happy to do backend work when a feature needs it

• You want influence through your work, not through a title

• You like working with designers and product people

• You enjoy technical debate and change your mind when the other argument is better

What We Offer

• Flexible remote setup

• Learning & development opportunities

• Generous vacation & workation budget

• Technical ownership of the platform at the core of wingmaite's product