Authority PartnersRemote
Senior Backend Engineer – AI Native
United States
Full Time
1 hour ago
H1B Sponsor
Key skills
TypeScriptAIClaudeNode.jsAWSPub/SubPostgreSQLRedisOpenAPIREST APIGitHubAccount Management
About this role
Authority Partners is a leading global IT services company seeking a Senior Backend Engineer to join a high-complexity digital media platform engagement. The role involves designing workstreams, directing AI agents, reviewing TypeScript/Node.js service implementations, and managing integration tasks that cannot be handled autonomously by agents.
Responsibilities:
- Design workstreams
- Direct AI agents
- Review agent-generated TypeScript/Node.js service implementations
- Personally own the integration spike work that agents cannot handle autonomously
- Direct 2–3 agent workstreams in parallel
Requirements:
- 5+ years of professional TypeScript/Node.js backend development in production microservices environments
- PostgreSQL at production depth: complex schema design, query optimisation (EXPLAIN ANALYSE, index design), transaction design for multi-step operations — ability to review AI-generated migrations and data access layers for correctness and data integrity
- REST API design: OpenAPI specification authorship, correct HTTP status semantics, idempotent mutation endpoints, pagination, rate-limit header implementation
- Direct experience directing AI agent code generation workstreams (Claude Code, Cursor Agent, or GitHub Copilot Workspace): context file design, workstream decomposition, and the ability to recognise AI-generated backend failure modes
- Ability to review AI-generated backend code for: type safety violations, missing error handling, N+1 query patterns, missing transactions, missing input validation, race conditions
- Good working knowledge of English
- AWS OpenSearch experience, particularly German language analysis chain configuration (decompounder, Hunspell stemmers, financial terminology synonym expansion)
- Experience building REST integrations against an underdocumented third-party APIs
- Redis production expertise: TTL strategy, eviction policy selection, pub/sub, serialisation correctness
- B2B2C access model implementation: IP-range validation, named user corporate account management, bulk subscription APIs
- Social platform API integration experience (LinkedIn, Meta Graph API, X/Twitter API v2, TikTok, or equivalent)
- Financial market data API integration (REST or WebSocket)
- Newsletter/notification system design with anti-spam law compliance