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Full-Stack Engineer - YC-backed AI Startup

Muxon
Posted a month ago, valid for 20 days
Location

Munich, Cavalier, ND

Salary

$70,000 - $110,000 per year

Contract type

Full Time

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Sonic Summary

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  • The position requires candidates to have 1+ years of professional full-stack engineering experience.
  • The salary range for this role is between €70,000 and €110,000 gross per year, along with equity participation.
  • The job is a full-time, 100% on-site role based in Munich, Germany, requiring work five days a week.
  • The successful candidate will design and build scalable systems using React, TypeScript, and Python while integrating AI capabilities into production software.
  • Candidates with experience in AI/LLM systems, startups, or founding-engineer environments will be favored.

Salary Transparency:

This position is intended for candidates with 1+ years of professional experience.
The salary range varies depending on experience, between €70,000 and €110,000 gross per year, plus equity participation.
Work model: Full-time, 100% on-site, 5 days/week.
Location: Munich, Germany.

Muxon is a small, globally active recruitment agency and is conducting this search on behalf of our partner, a YC-backed AI SaaS startup transforming the construction industry through AI-powered software that automates complex quoting and sales processes. The company is growing rapidly and offers engineers significant ownership in a high-intensity, product-focused environment.

Responsibilities

  • Design and build scalable, production-grade full-stack systems using React, TypeScript and Python.
  • Develop reliable backend APIs supporting AI capabilities and product growth.
  • Own features end-to-end, from architecture and implementation through deployment, monitoring and iteration.
  • Integrate LLMs, AI systems and large-scale data pipelines into production software.
  • Contribute to system architecture, cloud infrastructure, Terraform and DevOps tooling.
  • Work closely with users and the product team to turn real-world workflows into effective product solutions.
  • Ship improvements rapidly through pragmatic engineering decisions and short iteration cycles.

Requirements

  • 1+ years of professional full-stack engineering experience.
  • Strong experience with React, TypeScript and Python.
  • Proven ability to build complex, reliable software systems and solve performance and scaling challenges.
  • Experience with Docker, Cloud providers and Terraform.
  • Strong ownership and product mindset, with the ability to work independently and drive ideas through execution.
  • Willingness to work 5 days per week on-site in Munich.
  • Excellent English communication skills.
  • We value candidates who can demonstrate exceptional technical ability, ownership and impact — whether through professional experience, personal projects, academic work, or entrepreneurial ventures.
  • Experience with AI/LLM systems, startups or founding-engineer environments is a strong plus.


Benefits

  • Equity participation.
  • Company-paid sports membership and meal support.
  • Paid two-week team offsite in San Francisco.
  • High ownership, rapid career development and direct exposure to company building.
  • Access to the AI and productivity tools you need.

If you are an exceptional engineer looking to build high-impact AI products in a fast-growing startup, we encourage you to apply.





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