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Full-Stack Engineer – Next.js, AI Systems
Location
Germany
Posted
64 days ago
Salary
0
Seniority
Lead
Job Description
Full-Stack Engineer – Next.js, AI Systems
Lucid Labs
• You'll work directly with the Product Lead • You get context, you make decisions, and you see the impact of your work within days • You'll spend your time building a full-stack app with the underlying agent orchestration, knowledge logic, feedback loops, and evaluation pipelines • A new product from the ground up using a modern AI stack • Autonomous AI agents that identify, plan, and execute tasks • Agent steering logic — deciding what to do, when to act, when to escalate • Evaluation and validation frameworks to measure whether the agent is actually getting smarter • Human-in-the-loop workflows where the AI prepares and the human decides • APIs, database logic, and deployment pipelines
Job Requirements
- You've built a system where AI agents autonomously plan and execute tasks
- Experience with React and Next.js (App Router, Server Components)
- Self-driven work style — you find solutions before someone tells you there's a problem
- Understanding of feedback loops, evaluation pipelines (e.g. Arize Phoenix or Langfuse), or RLHF concepts
- Experience with LLM APIs (OpenAI, Anthropic) and streaming architectures
- Awareness of data privacy and EU hosting requirements
- Docker Infrastructure experience (Nice to have)
- CS degree (Not required)
- ML / model training (Not required)
- 10 years of experience with a 3-year-old framework (Not required)
Benefits
- Your own product — no agency-hopping, no legacy code
- Clear roadmap — first milestone in 6–8 weeks, then we iterate with pilot customers and build based on real user feedback
- Remote-first — async by default, minimal meetings, output over hours
- Flexible — freelance or permanent, starting at 20h/week
- Growth — the project is growing, and your role can grow with it
- Tooling — Cursor Pro, Claude and OpenAI credits
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