Senior Backend Engineer

Senior Backend Engineer Type: Full-time | Location: Remote | Experience: 5+ years We're looking for a backend engineer who takes security personally — someone who understands that every line of code is part of a chain of custody and treats reliability, compliance, and audit integrity as first-class design requirements, not afterthoughts. You'll design and maintain the APIs and services at the core of law enforcement's evidence workflow — working across distributed microservices, AWS GovCloud deployments, and large-file transfer pipelines. This is hands-on engineering work with real accountability for the systems you build. What You'll Do Design and develop microservices and RESTful APIs using Node.js, deployed on AWS (EC2, ECS, Lambda) and AWS GovCloud. Build resilient upload and retrieval pipelines for large files — video extractions, forensic dumps — with support for resumable transfers and unreliable network conditions. Implement secure multipart S3 uploads, AES-256 encryption, and file integrity verification for evidence handling. Design audit-defensible APIs with structured logging, event sourcing, and chain-of-custody tracking baked in from the start. Apply OWASP, CJIS, and SOC2 security principles across API layers, authentication (OAuth2/JWT), and least-privilege access control. Collaborate with frontend (Angular), mobile (iOS/Swift), and Electron desktop teams to define and maintain secure, consistent API contracts. Write comprehensive unit, integration, and performance tests; own your CI/CD pipelines and automated deployments. Participate in threat modeling, security audits, incident response, and code reviews with a focus on evidence integrity. Contribute to internal technical documentation and architectural standards for microservice patterns. What We're Looking ForSecurity Ownership You treat every API endpoint, auth flow, and logging call as part of an evidence chain. You proactively