Senior Python Backend Engineer (LLM/RAG)

We are seeking aSenior Python Backend Engineer (LLM/RAG). You will build APIs and event-driven services that power AML and sanctions screening, combining NLP, search and vector retrieval to improve match quality and auditability. Work closely with product and compliance partners in a hybrid setup in Singapore.

Responsibilities

• Build and maintain Python back-end services, APIs and microservices for screening workflows
• Design event-driven integrations to support high-throughput, traceable processing
• Implement LLM and retrieval-augmented generation (RAG) patterns for entity resolution and investigation support
• Develop search and retrieval using PostgreSQL, Elasticsearch/OpenSearch and vector stores
• Partner with compliance and engineering stakeholders to translate controls into system behavior
• Improve observability, audit trails and explainability for screening decisions and overrides
• Write automated tests and support reliable releases in a regulated environment

Requirements

• Python proficiency for production back-end development
• Back-end architecture experience with microservices, APIs and event-driven systems
• Search and retrieval capability across full-text search and relevance tuning
• Databases knowledge with PostgreSQL and data modeling for traceability
• Vector databases familiarity such as Pinecone or similar vector stores
• Generative AI hands-on experience with LLM applications, RAG, agents or workflow-based orchestration
• AML screening working knowledge across KYC, sanctions, PEP, watchlists, adverse media and negative news
• Risk and controls mindset with focus on auditability, logging and explainable outcomes

Nice to have

• Experience with Azure AI Search
• Familiarity with OpenSearch tuning and relevance evaluation approaches
• Exposure to screening model governance, thresholding and investigation workflows