Software Engineer

Summary

iFIT is creating a holistic health and fitness platform that integrates physical fitness, mental health, nutrition, and active recovery through interactive software. The Software Engineer will build and maintain backend services for interactive fitness experiences, develop scalable microservices and APIs in AWS, modernize legacy systems, and support platform reliability through monitoring and on-call participation.

Responsibilities

• Develop and maintain backend microservices in TypeScript and NestJS deployed via AWS ECS, ensuring services are well-designed, scalable, and aligned with our service-oriented architecture and best practices
• Design, implement, and document robust RESTful APIs that are secure, efficient, and easy for client teams to use
• Help migrate legacy serverless functions from AWS Lambda into containerized services on ECS, refactoring and re-architecting older systems for improved performance, maintainability, and consistency across the platform
• Work closely with front-end and mobile teams, product managers, and designers to deliver end-to-end features, clarify requirements, review designs, and ensure seamless integration across multiple services
• Write clean, well-tested code and participate in peer code reviews, maintaining comprehensive unit and integration tests and continuously improving CI/CD pipelines
• Take ownership of the reliability of the services you build, monitor performance, troubleshoot production issues, and participate in a rotating 24/7 on-call schedule to quickly address critical incidents and minimize downtime

Skills

• 4+ years of professional software engineering experience building backend or full-stack applications in a cloud environment
• Strong proficiency in TypeScript/JavaScript and Node.js with hands-on experience with backend frameworks — NestJS strongly preferred, or similar frameworks like Express/Koa with a willingness to learn NestJS
• Solid knowledge of AWS services and architecture, with experience deploying and running containerized applications in AWS ECS, EKS, or similar, and familiarity with microservices, distributed systems, and event-driven architecture
• Proven experience designing, building, and consuming RESTful APIs with a strong understanding of API security and performance considerations
• Experience with relational and NoSQL databases such as PostgreSQL, MySQL, and MongoDB, as well as caching mechanisms such as Redis, with the ability to write efficient queries and optimize data access in a cloud environment
• Comfortable with CI/CD pipelines and infrastructure-as-code tools such as Terraform or CloudFormation, and knowledge of monitoring and logging tools such as CloudWatch and Datadog
• Ability to jump into unfamiliar projects quickly and work across different services and tech stacks as needed
• Excellent communication and collaboration skills with a team-oriented mindset and a habit of knowledge sharing and proactive problem-solving
• Authorized to work in the United States without sponsorship
• To facilitate collaboration, you must be available during core hours of 10 AM - 3 PM US Mountain Time, and will participate in a rotating on-call schedule approximately one week per rotation with the team
• Deep understanding of microservice design patterns, inter-service communication including REST, gRPC, and message queues, and related tooling such as API gateways and service mesh
• Familiarity with Claude Code or similar AI coding assistants
• Experience with DevOps or Site Reliability Engineering practices including automated testing, continuous deployment, and infrastructure monitoring
• Experience with Stripe's broad set of products and third-party subscription providers such as Apple App Store or Google Play subscription platforms

Qualifications

Must Haves

• 4+ years of professional software engineering experience building backend or full-stack applications in a cloud environment
• Strong proficiency in TypeScript/JavaScript and Node.js with hands-on experience with backend frameworks — NestJS strongly preferred, or similar frameworks like Express/Koa with a willingness to learn NestJS
• Solid knowledge of AWS services and architecture, with experience deploying and running containerized applications in AWS ECS, EKS, or similar, and familiarity with microservices, distributed systems, and event-driven architecture
• Proven experience designing, building, and consuming RESTful APIs with a strong understanding of API security and performance considerations
• Experience with relational and NoSQL databases such as PostgreSQL, MySQL, and MongoDB, as well as caching mechanisms such as Redis, with the ability to write efficient queries and optimize data access in a cloud environment
• Comfortable with CI/CD pipelines and infrastructure-as-code tools such as Terraform or CloudFormation, and knowledge of monitoring and logging tools such as CloudWatch and Datadog
• Ability to jump into unfamiliar projects quickly and work across different services and tech stacks as needed
• Excellent communication and collaboration skills with a team-oriented mindset and a habit of knowledge sharing and proactive problem-solving
• Authorized to work in the United States without sponsorship
• To facilitate collaboration, you must be available during core hours of 10 AM - 3 PM US Mountain Time, and will participate in a rotating on-call schedule approximately one week per rotation with the team

Nice to Haves

• Deep understanding of microservice design patterns, inter-service communication including REST, gRPC, and message queues, and related tooling such as API gateways and service mesh
• Familiarity with Claude Code or similar AI coding assistants
• Experience with DevOps or Site Reliability Engineering practices including automated testing, continuous deployment, and infrastructure monitoring
• Experience with Stripe's broad set of products and third-party subscription providers such as Apple App Store or Google Play subscription platforms