Back-End Engineer

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Back-End Engineer

SF

Engineering

Remote

Full-time

About Us

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

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

• 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.

Qualifications

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.

Benefits

• 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.

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