Back-End Engineer

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.