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Full-Stack Engineer – Next.js, AI Systems

Full-stack EngineerSoftware EngineerPart TimeRemoteLeadTeam 11-50H1B No SponsorCompany SiteLinkedIn

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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