Backend Engineer, Credit Key

• 5+ years building complex backend systems
• Experience in Ruby, Rails, JavaScript, Node.js, NestJS, TypeScript, or similar
• Strong programming skills in more than one language
• Solid Git fundamentals
• Expertise in SQL and/or NoSQL schema design and complex queries
• Experience designing RESTful APIs
• Ops experience: deploying and maintaining services, monitoring, cloud infrastructure (AWS preferred), Terraform, CI/CD pipelines

Desirable

• You thrive at the intersection of building, running, and improving complex systems. You balance pragmatism with craft, and you take pride in leaving code, services, and architecture better than you found them. You’re comfortable with:
• Translating business requirements into maintainable, scalable code
• Owning services end-to-end, from design to deployment to monitoring and iteration
• Experimenting, learning, and iterating to improve systems over time
• Making architecture decisions and documenting design choices
• Reviewing code and providing constructive feedback
• You also have experience managing production services, deploying infrastructure with Terraform, and maintaining operational health in cloud environments
• Design and implement backend systems, APIs, and features
• Own services end-to-end, including deployment, monitoring, and scaling
• Contribute to architecture discussions and design documentation
• Collaborate with product, engineering, and operations teams to define realistic MVPs and iteratively build solutions
• Share knowledge and help raise the quality bar across the team
• You’ll bring your experience to guide best practices while flexing your expertise in specific areas of the platform. We value engineers who combine technical rigor with practical judgment: knowing when to innovate, when to iterate, and when to optimize for maintainability