Authority Partners is seeking a Senior Backend Engineer to join a high-complexity digital media platform engagement as an agent workstream directors. This is not a standard backend role — you will design workstreams, direct AI agents, review agent-generated TypeScript/Node.js service implementations, and personally own the integration spike work that agents cannot handle autonomously. Each engineer directs 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

Nice to Have:

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

Education:

Bachelor's degree in Computer Science, Software Engineering or related field would be of great value, but if you’re passionate and have the experience that backs up your abilities, for us, talent outweighs degree every time.

AP Perks:

Most cutting-edge technologies
Opportunity to work with people who are at the top of their field
Great culture and environment
Competitive remuneration package. We reward excellence
Referral bonus
Career growth
Collaborative learning environment
Mentorship programs
Professional training

About Authority Partners:
Authority Partners is a leading and global IT services company with over 27 years of experience, serving clients within the financial, healthcare, insurance, mortgage and technology sectors, among many others. We are committed to building relationships with IT professionals who possess integrity, dedication, teamwork, and the desire to learn and grow with us. We specialize in placement for long-term contracts and permanent opportunities and helping our consultants achieve their career success.

Authority Partners is an equal opportunity employer and is committed to providing a workplace that is free from all types of discrimination, as well as from abusive or offensive behavior and harassment

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