Senior ML Engineer – LangChain & RAG Systems

Maxwell Bond; Camden Town; Sur place; GBP 150 000 - 175 000; Plein temps

Avantages offerts par ce poste

In-office (3-5 days/week)

Résumé du poste

Descrial, based in London, is seeking a Machine Learning Engineer to join the core UK team in King’s Cross. You will own and develop LangGraph/LangChain workflows, manage vector retrieval and RAG pipelines, and integrate major model providers. Expect high-impact work shaping private capital analytics.

You will work with Python 3.11+/FastAPI, PostgreSQL, and AWS, balancing cost, latency and accuracy in a fast-paced environment with strong founder-led drive.

Qualifications

• 5+ years in software engineering with strong Python.

Responsabilités

• Build LangGraph/LangChain workflows with state, checkpoints, tool calls and human approval patterns.
• Handle parsing, chunking, embeddings, Qdrant vector retrieval, reranking and hybrid search in RAG pipelines.
• Extend GraphRAG with Neo4j, Cypher and graph data modelling.
• Build golden datasets, LLM-as-judge evaluations and regression gates for prompt and model changes.

Connaissances

Python

LangGraph

LangChain

Agent orchestration

RAG with embeddings

Graph data modelling

AI coding tools

PostgreSQL

AWS

Formation

Engineering degree or equivalent experience

Outils

Neo4j

Cypher

Qdrant

Weaviate

pgvector

LangSmith

LangFuse

Description du poste

Descrial, based in London, is seeking a Machine Learning Engineer to join the core UK team in King’s Cross. You will own and develop LangGraph/LangChain workflows, manage vector retrieval and RAG pipelines, and integrate major model providers. Expect high-impact work shaping private capital analytics.

You will work with Python 3.11+/FastAPI, PostgreSQL, and AWS, balancing cost, latency and accuracy in a fast-paced environment with strong founder-led drive.