26 to 48 of 48 LangChain Jobs in the City of London

5+ years in AI/ML roles with a strong record of ownership and delivery. Hands-on experience with LLM development or fine-tuning , including frameworks like Hugging Face, LangChain, or custom pipelines. Deep technical understanding of biometric security systems and privacy-aware architecture. Strong Python/ML stack (e.g., PyTorch, TensorFlow, Scikit-learn). Experience building real-time AI More ❯

you a good overview of what is on offer) Backend: Ruby on Rails, PostgreSQL, Sidekiq, Redis, AWS Frontend: Turbo/Hotwire, Phlex, AlpineJS, TailwindCSS AI/LLM: OpenAI, Claude, LangChain (or equivalents) Infra: Docker, Terraform, GitHub Actions, CloudWatch What You’ll Do Write clean, well-tested code across the stack with a product-focused mindset Own feature development end to More ❯

Synechron is looking for a Senior AI Engineer to join their Data and AI Practice to work on a multi - year, AI programme of work within a leading financial institution. The role requires an experienced and talented AI Engineer to More ❯

proven contract engineer with experience building and fine tuning LLM solutions in an applied environment. To provide a snapshot of the experience they are looking for, Conversational AI – NLP LangChain, LangGraph & RAG Pytorch/Tensorflow You will ideally come from a financial services background but this is not an absolute requirement. They work in a hybrid model with More ❯

ll work closely with the CTO to architect and implement the intelligence layer of the platform — with real ownership over: Designing and deploying LLM-driven agent systems using LangGraph, LangChain, or similar tools to coordinate tool use, memory, and fallback logic Building orchestration logic for autonomous workflows — handling retries, dependencies, logging, and execution across simulation and design environments Creating custom … ideally in fast-moving, early-stage environments Strong Python skills, with a track record of building or deploying LLM-based systems in production Hands-on experience with frameworks like LangChain, LangGraph, or custom-built agent orchestration setups Familiarity with LLM APIs (OpenAI, Anthropic, Mistral, etc.), embedding stores, retrieval pipelines (e.g. Weaviate, Pinecone), and eval tooling Comfort building and testing AI More ❯

problem-solving abilities. Effective time management and prioritisation skills under tight deadlines. Bonus Skills & Expertise Experience deploying and managing applications using Azure and Docker. Familiarity with frameworks such as LangChain and expertise in Retrieval-Augmented Generation (RAG) models for AI-driven applications. Proficiency with pandas for data manipulation. Full Stack Developer - What's in it for you? Salary Reviews: Twice More ❯

Title: Data Scientist Location: London, UK (Hybrid) Job Type: Permanent Job Description: Experience: Minimum of 8+ years. Skilled Required: LLM, RAG, Finetuning, NLP, Text Summarisation, ML, Feature Engineering Llamaindex, LangChain, LangSmith Vector DB, Vector Search, FAISS Embeddings Experience with OCR, layout models PDF and text file parsing, along with various other file types Experience with REST API More ❯

Role: Senior AI Engineer (x2) 🌍 Location: Shoreditch, London (hybrid - 3 days per week) 💰 Salary: £80,000 - £110,000, plus benefits (below) 🛠 Key Skills: Python, AI/LLMs, LangChain/LangGraph, AI Agents, AWS 🚀 Industry: B2B SaaS Start-up A fast-growing B2B SaaS start-up is looking for a talented Senior AI Engineer to set up and co-lead the … re looking for: AI/ML or LLM-based development in a fast-paced start-up environment. Built and deployed production-grade agentic systems Hands-on experience with PydanticAI, LangChain, LangGraph, or similar agent orchestration tools. Strong understanding of LLM evaluation, prompt design, and techniques for tuning models to domain-specific tasks. Deep understanding of large language models (LLMs), including More ❯

in building and deploying LLM solutions. This place has a high technical bar, so solid Python skills are a must. Experience with agentic frameworks and familiarity with agentic systems – LangChain, LangGraph, AutoGen, etc. Commercial experience deploying LLM applications to production (this isn’t a research role). Experience taking the lead on projects from a "tech lead" perspective (only relevant More ❯

using React and Tailwind CSS. Skilled in managing large databases like PostgreSQL. Familiarity with container orchestration tools such as Docker and Kubernetes. Hands-on experience with LLM libraries like LangChain, LangGraph, LlamaIndex, or Ollama. But most importantly, you're driven by a passion for AI innovation and thrive on solving complex challenges. 🤖 🎉 Why This Role? This is your opportunity to More ❯

with Node.js, Express, RESTful APIs or GraphQL Experience building production-grade applications and designing clean data models (SQL/NoSQL) Bonus Points For: Familiarity with AI/LLM tools (LangChain, Vercel AI SDK, OpenAI APIs) Experience building real-time apps (e.g., WebSockets) Understanding of authentication/authorization flows in web apps Knowledge of financial services, fintech, or enterprise-grade products More ❯

Strong coding skills in Python and experience with Typescript Experience setting up and developing RAG flows Familiarity with vector databases Advanced prompt engineering capabilities Experience with LLM orchestration frameworks (LangChain, LangGraph, LlamaIndex, etc.) Track record of shipping reliable AI systems to production Valuable Additional Skills: Experience with goal-oriented and autonomous agent architectures Financial domain knowledge or fintech experience Experience More ❯

AI Fullstack Product Engineers - Userled - 80-100K + Bens + Equity - London Hybrid (3 days in the office) Userled is reinventing B2B marketing with Generative AI Marketing early stage start-up, helping enterprise teams reach high-intent buyers through More ❯

Learning Engineer 18 month project, 6 month rolling contracts. Rate negotiable but upwards of 600 p/d. Looking for people with the following skillset: Python, Pytorch, Tensorflow, Langgraph, Langchain, CrewAI, LlamaIndex etc ML Ops VertexAI Prompt Engineering 1st of July start date. Apply through this advert or email jack.herbert@oliverbernard.com for more info. More ❯

Make Designing secure multi-tenant SaaS products Scaling DBs and infra across real-time chat and long-term memory Nice-to-Have Built or scaled an agent-native product (LangChain, Replit AI, etc) Familiar with M&A, private equity, or high-value B2B workflows Strong product sense—can simplify complexity without dumbing things down More ❯

memory handling, tool usage, and RAG pipelines Collaborate on system design, prompt tuning, and architecture decisions Optimize performance for speed, stability, and user satisfaction Skills & Experience: Proven experience with LangChain or LangGraph Strong Python skills and experience working with LLMs Familiarity with RAG pipelines Experience building chatbots or agent-based systems Knowledge of real-time APIs and data integration (e.g. More ❯

real-time data Implement human-in-the-loop systems where needed Skills and Qualifications Experience building enExceptional Python skills and experience with LLM-powered AI orchestration frameworks (e.g., DSPy, LangChain, or similar) Experience in AI-driven automation & orchestration in production environments Proven ability to optimize AI agents for reliability and efficiency Familiarity with data pipelines & integrations Interest in AI process More ❯

both SaaS and AI/LLM components Integrate and optimize LLMs (e.g., OpenAI , Gemini ) through prompt engineering and API orchestration Implement multi-step AI workflows using frameworks such as LangChain Design and optimize relational databases, particularly MySQL Develop type-safe RPC endpoints using tRPC for seamless frontend-backend communication Rapidly adapt to a modern development stack and contribute to high … and Prisma Strong understanding of MySQL , including schema design and performance optimization Practical experience integrating with LLMs, including prompt design and API management Familiarity with orchestration tools such as LangChain or similar Ability to learn quickly and deliver high-quality features in a dynamic, fast-paced environment Preferred Qualifications Experience deploying and fine-tuning custom AI models Background in developing More ❯

both SaaS and AI/LLM components Integrate and optimize LLMs (e.g., OpenAI , Gemini ) through prompt engineering and API orchestration Implement multi-step AI workflows using frameworks such as LangChain Design and optimize relational databases, particularly MySQL Develop type-safe RPC endpoints using tRPC for seamless frontend-backend communication Rapidly adapt to a modern development stack and contribute to high … and Prisma Strong understanding of MySQL , including schema design and performance optimization Practical experience integrating with LLMs, including prompt design and API management Familiarity with orchestration tools such as LangChain or similar Ability to learn quickly and deliver high-quality features in a dynamic, fast-paced environment Preferred Qualifications Experience deploying and fine-tuning custom AI models Background in developing More ❯

web applications with Next.js, tRPC, TypeScript, and Prisma Practical experience integrating with AI models such as ChatGPT or Gemini, including prompt engineering and API management Familiarity with tools like LangChain (or similar) to implement multi-step AI workflows A demonstrated ability to learn quickly and deliver functional features in a fast-paced environment Preferred Qualifications Experience deploying and fine-tuning More ❯

with clean code Understands the full lifecycle of shipping software — from idea to deployment Speaks English comfortably Cares about sustainability and wants to build for impact Nice to have: LangChain/LangGraph Cursor What we offer: Flexible form of contract (B2B/UoP/other) Hybrid work setup (our office is in Warsaw ) Benefits package (private medical care, sports card More ❯

extremely fast growing startup to one day take the plunge of your own Skills we favour but aren't a requirement, experience in/with: Nextjs Python AWS infra Langchain/langgraph fastapi Wait so it's a full-stack role? Sort of... If you're purely front-end or backend you need to show you are a beast at More ❯

fun, social office - this may be the role for you! You will ideally have: 3+ years commercial experience in Python Strong academic background from a top university Familiarity with LangChain/LangGraph Excitement to join an early stage start-up Passionate about AI Knowledge of AI workflows and creating Agents Experienced AI Engineers wanting to take the next step working More ❯