New

Back-End Engineer

United StatesUnited States·San FranciscoRemotefull-timemid
EngineeringBackend Developer
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Quick Summary

Requirements Summary

3+ years of experience as a backend or full stack engineer or similar role. Expert proficiency in a programming language used on the backend, such as Ruby, Typescript, Python,

Technical Tools
EngineeringBackend Developer
Fifth Door unlocks the power of imagination by making it easy for anyone to create, share, and play turn-based games anywhere, with anyone. We exist to inspire connection, creativity, and community through the limitless joy of games.

Create. Play. Anywhere.


About the Role

~1 min read
We are seeking a Back-End Engineer who is passionate about delivering outstanding user experiences that delight our users. This is an opportunity to join a fast-moving, ambitious team where your work will have real impact from day one.

Responsibilities

~1 min read

  • →Help architect, develop, and maintain the backend for our AI-powered game engine and web applications.
  • →Collaborate with cross-functional teams to design scalable and secure systems.
  • →Optimize applications for maximum speed, performance, and scalability.
  • →Write clean, maintainable, and well-tested code.
  • →Identify and troubleshoot back-end performance issues.
  • →Stay current with trends and emerging technologies, bringing ideas back to the team.

Requirements

~1 min read

Must-Have:
  • 3+ years of experience as a backend or full stack engineer or similar role.
  • Expert proficiency in a programming language used on the backend, such as Ruby, Typescript, Python, or Golang
  • Strong understanding of backend development concepts (e.g. API development, structuring applications, databases, workflows)
  • Experience working with databases, both SQL and NoSQL
  • Familiarity with modern build pipelines and tools
  • Strong interest in AI technologies or experience integrating AI into a product
  • Experience working in an agile development environment
  • Proficiency using AI tools in development workflows

Nice-to-Have:
  • Some familiarity with front-end technologies and working with Typescript and React is a plus.
  • Passion for gaming, creative tools, or AI applications.
  • Experience with AI prompt engineering.

What We Offer

~1 min read
✓Competitive salary and meaningful equity.
✓Health, dental, and vision coverage.
✓Flexible work hours and unlimited vacation policy.
✓A collaborative, supportive team environment.
✓Opportunity to shape product direction and culture early.

Location & Eligibility

Where is the job
San Francisco, United States
Remote within one country
Who can apply
US

Listing Details

Posted
May 13, 2025
First seen
September 26, 2026
Last seen
September 30, 2026

Posting Health

Days active
3
Repost count
0
Trust Level
29%
Scored at
September 30, 2026

Signal breakdown

freshnesssource trustcontent trustemployer trust
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Back-End Engineer