Senior AI Engineer | LangGraph Agents & RAG | Python, LLM Evals, MCP, FastAPI

Senior AI Engineer building production agentic AI and RAG systems in Python, backed by 13+ years of shipping production software.

Agentic AI / LangGraph

Multi-agent systems on LangGraph: typed state schemas with reducers, conditional edges, intent routing, Send fan-out, durable checkpoints (SQLite, PostgreSQL) and human-in-the-loop interrupt/resume review gates. Tool calling, MCP servers, deterministic workflow spines where an LLM is not needed. Migrated a 60+ pipeline codebase from LlamaIndex to LangGraph.

RAG & Retrieval

Hybrid search: dense embeddings + BM25 fused by reciprocal rank fusion, cross-encoder reranking, faithfulness and grounding gates. Vector databases: LanceDB, Qdrant, pgvector. FastEmbed, semantic search, chunking strategies.

LLM Evaluation & Observability

Golden datasets, LLM-as-judge with planted-defect self-tests, DeepEval, promptfoo, adversarial prompt testing, PII leakage guards, token usage and cost tracking per call, prompt caching optimisation. LangSmith tracing.

LLMs

OpenAI, Anthropic Claude, DeepSeek, AWS Bedrock. Prompt engineering, structured output, JSON schema constraints.

Python Backend

Python 3.12+, async/await, FastAPI, Starlette, pytest, pytest-asyncio, ruff, mypy, pandas, scikit-learn, Prophet.

Platform & DevOps

Docker, Kubernetes, ArgoCD, AWS, GitHub Actions, GitLab CI, SonarCloud, Flyway, PostgreSQL, Snowflake, Cloudflare Workers, systemd/Linux VPS operations.

Software Engineering

TypeScript, React, Next.js, Node.js, Go, GraphQL, gRPC, NATS, Protobuf, microservices, event-driven architecture, ADRs, code review, TDD.

Recent projects

- US home-services company (2026, contract): rebuilt a provider-audit agent as one Python service in shadow mode against the live agent (261 tests, full event parity) on Kubernetes/ArgoCD; built a hybrid-search RAG index over the engineering estate with a golden retrieval-eval suite.

- Own production platform: 60+ LangGraph pipelines on a VPS with durable review gates, evals and cost tracking.

- Vitrifi (2022-2026): architected a multi-tenant SaaS on Go microservices, GraphQL, gRPC and NATS for UK wholesale broadband.

100% remote, CET timezone, English. EU B2B invoicing.