Senior Agentic AI Developer

· Job Title: Senior Agentic AI Developer · Location: London, UK (Hybrid, 3 days onsite) · Duration: 6 months (Inside IR35) Job Description: About the Role : Hands-on senior IC role designing, building, and productionising enterprise-grade multi-agent AI systems at scale Operates across the full agentic stack - orchestration, model management, RAG, observability, and evaluation Skillset and Key Responsibilities : Architect production-grade multi-agent workflows using frameworks such as LangGraph, CrewAI, AutoGen etc. Design and implement agent orchestration patterns - intent detection, dynamic agent routing, conversation state management, and hierarchical multi-agent topologies Build and govern MCP (Model Context Protocol) servers exposing enterprise tools, internal systems, APIs, and data sources as structured, auditable agent tool surfaces. Knowledge of A2A is an advantage. Develop against and configure AI Gateway platforms (LiteLLM, AWS Bedrock, Azure API Management, Apigee AI Extensions) for multi-model routing, cost controls, quota enforcement, and model fallback Integrate Responsible AI guardrails - PII masking, content moderation, toxicity filtering, and policy enforcement - across the model invocation layer Own RAG pipeline design and optimization - chunking strategy, embedding model selection, hybrid retrieval, reranking, hallucination mitigation etc. Build and maintain LLM evaluation frameworks - golden test sets, regression suites, LLM-as-a-judge, online A/B and shadow evals, red-teaming for prompt injection, jailbreaks, and adversarial inputs Own and build LLM observability using platforms such as Langfuse, etc. Contribute to CI/CD pipelines for agent systems - containerized deployments, automated behavioral testing, feature flag management, and progressive rollout patterns Apply security-first engineering aligned with Agent Development Lifecycle (ADLC) principles - agent identity, least-privilege tool access, sandboxed execution, and full audit traceability etc. Qualifications: Bachelor’s degree in computer science, Information Technology, or a related field.