Hybrid Senior Backend Engineer

at Knox Systems, Inc.

• Job title: Senior Backend Engineer
• Job type: Full Time
• Experience level: Senior
• Salary: $145,000 - $170,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Distributed Systems, DynamoDB, JavaScript, Jest, Kafka, Node.js, Postgres, RabbitMQ, Redis, Terraform, TypeScript
• Location requirements: Hybrid, Charlotte, United States

About the role

• Senior Backend Engineer responsible for integrating third-party services and AI-driven analysis. Building systems for federal compliance at Knox, securing sensitive government environments.

Responsibilities

• Build automated validation for Key Security Indicators across 26+ KSI families (CNA, IAM, SVC, MLA, etc.) with hybrid automated + AI-driven scoring
• Develop and maintain integrations with FedRAMP-authorized services
• Enhance and productionize OWASP ZAP integration for dynamic application security testing of customer SaaS applications
• Implement multi-model workflows combining OpenAI (GPT-4o), Anthropic (Claude), Google (Gemini), and Groq for compliance reasoning
• Extend Prisma schema for new features; optimize complex queries across 35+ models
• Implement Redis caching for frequently accessed compliance data and KSI results
• Build SQS-based job queues for long-running compliance evaluations and bulk imports
• Instrument code with CloudWatch metrics, structured logging, and distributed tracing
• Write comprehensive unit and integration tests (Jest); achieve >80% code coverage on critical paths
• Maintain up-to-date API documentation (OpenAPI), architecture decision records (ADRs), and runbooks

Requirements

• 5+ years backend development with TypeScript/Node.js; deep understanding of async patterns, streams, and event loops
• NestJS or similar frameworks with dependency injection and modular architecture
• PostgreSQL expertise: Complex joins, CTEs, window functions, indexing strategies, query optimization
• Prisma ORM or similar with migrations and schema management
• RESTful API design: Pagination, filtering, sorting, error handling, versioning, rate limiting
• AWS services: S3, Lambda, SQS, DynamoDB, OpenSearch, Secrets Manager, IAM policies
• AI/ML APIs: Hands-on experience integrating OpenAI, Anthropic, Google Gemini, or similar
• Third-party API integration: OAuth2, SAML, webhooks, retry logic, API versioning, SDK usage
• Infrastructure-as-code familiarity: Ability to parse Terraform/CloudFormation and understand resource configurations
• Security testing tools: Experience with OWASP ZAP, Burp Suite, or similar DAST/SAST tools
• Message queues: SQS, RabbitMQ, Kafka, or similar for async job processing
• Ownership mentality: End-to-end ownership of features from design → implementation → deployment → monitoring
• Problem solver: Thrives on debugging complex issues across distributed systems and third-party integrations
• Detail-oriented: Compliance work requires precision—small errors can have big consequences
• Collaborative: Works closely with frontend engineer, engineering manager, and CTO

Benefits

• Medical
• Dental
• Vision
• Life & Disability
• Unlimited PTO
• Employee funded 401k plan