Staff/Principal Software Engineer

Job Title: Staff/Principal Software Engineer
Job Location St. Louis, Missouri-US
Job Type: Contract

Job Description:

• 10+ years of experience building production distributed systems
• Strong Java + Spring Boot
• Strong AWS experience
• Experience with microservices, APIs, event-driven architecture
• Experience building ML/AI inference pipelines
• Data normalization, feature pipelines, model-serving integration
• Hands-on Edge Computing / CDN
  • Edge Workers
  • CDN Functions
  • View email address on us.fitly.work or similar
• Strong system architecture/design experience
• Experience building 0-to-1 / greenfield systems
• Comfortable working in fast-paced, ambiguous environments
• Strong experience using AI-assisted development tools
  • GitHub Copilot
  • LLM-based coding tools
  • Agentic coding assistants
• Strong JavaScript/TypeScript or ability to work with JS/TS edge runtimes

Nice-to-Have

• Identity/Security experience: JWT, JWS, PKI, OAuth 2.0, bot detection
• Python
• Databricks
• ML Model Registry
• Observability: distributed tracing, logging, dashboards
• Third-party/vendor integrations
• Open-source contributions

Tech Stack

• Backend: Java, Spring Boot
• Cloud: AWS
• Edge: Edge Workers, CDN Compute, View email address on us.fitly.work
• AI/Data: Python, Databricks, ML Model Registry
• Languages: Java, JavaScript/TypeScript, Python
• Dev Tools: GitHub Copilot, AI/LLM coding tools