Data Scientist or AI/ML Engineer

ZipRecruiter; City Of London; On-site; GBP 125,000 - 150,000; Full time

Job summary

A leading recruitment platform is seeking a skilled professional with advanced Python proficiency and a strong background in ML/AI solutions. The ideal candidate will have experience in scalable code architecture, NLP techniques, and the ability to evaluate ML/AI strategies. This position requires expertise in modern AI frameworks and strong debugging skills.

Skills

Advanced Python proficiency

Understanding of API integration patterns

Experience with authentication mechanisms

Delivered ML/AI solutions to production

Hands-on experience with RAG architectures

Strong grasp of NLP techniques

Ability to evaluate trade-offs

Experience with PoC development

Familiarity with LangChain or LlamaIndex

Strong debugging and optimization skills

Job description

Overview

You have:

• Advanced Python proficiency, especially in scalable, clean code architecture and microservices (e.g., FastAPI, Flask, asyncio)
• Solid understanding of API integration patterns and inter-servic communication (e.g. REST, Kafka)
• Experience with authentication and authorization mechanisms (e.g. OAuth2, JWT, Azure AD)
• At least two ML/AI solutions delivered to production, ideally involving document understanding, NLP or search/retrieval systems
• Practical knowledge and hands-on experience with: RAG architectures, LLMs (e.g., OpenAI, Antropic), Vector databases (e.g., FAISS, Azure AI Search), Embeddings (e.g., OpenAI)
• Strong grasp of NLP techniques: named entity recognition (NER), document classification, chunking, summarization, question answering.
• Ability to evaluate trade-offs and select appropriate ML/AI techniques for a given problem.
• Experience with PoC development and iterating quickly based on results.
• Familiarity with LangChain, LlamaIndex, or similar agentic frameworks.
• Strong debugging, profiling, and optimization skills for AI applications.