1 to 25 of 42 Permanent LLM Jobs in the City of Westminster

Staff Software Engineer-AI

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
application programming interfaces, data pipelines, inference pipelines, and platform capabilities that support real-time and batch AI workloads at enterprise scale Implement advanced large language model applications using retrieval-augmented generation, prompt orchestration, evaluation frameworks, model optimisation, agentic workflows, and tool integration Make key technical decisions while remaining accountable ...

Staff Software Engineer - AI

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
application programming interfaces, data pipelines, inference pipelines, and platform capabilities that support real-time and batch AI workloads at enterprise scale • Implement advanced large language model applications using retrieval-augmented generation, prompt orchestration, evaluation frameworks, model optimisation, agentic workflows, and tool integration • Make key technical decisions while remaining accountable ...

Machine Learning Scientist III

Location
City of Westminster, England, United Kingdom
Airflow, Docker, Kubernetes, and cloud-native infrastructure. Design and deploy scalable batch and real-time ML pipelines supporting customer-facing applications. Develop and operationalise LLM applications, RAG systems, and Generative AI capabilities for content understanding, summarisation, classification, and recommendation use cases. Build evaluation frameworks and observability solutions to monitor model ...

Knowledge Engineering Senior Analyst

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
techniques, and algorithms with the right architecture, and begin to guide junior engineers on the project. You stay current with knowledge engineering, generative AI, LLM, and multi-modal models; look for opportunities to apply them to the problem at hand. You design, evaluate, and maintain ontologies as needed. You help ...

AI/ML Computational Scientist

Location
Westminster, West End, United Kingdom
python-based AI/ML framework and familiarity with relevant libraries and frameworks (e.g., TensorFlow, PyTorch).. Experience working with language models like LLM's APIs and optimizing their usage for specific applications. Experience with the following programming languages: Python, C++, Java, R, SQL Strong written & verbal communication skills ...

Knowledge Engineering Consultant / Team Lead

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
techniques, and algorithms with the right architecture, and begin to guide junior engineers on the project. You stay current with knowledge engineering, generative AI, LLM, and multi-modal models; look for opportunities to apply them to the problem at hand. You design, evaluate, and maintain ontologies as needed. You help ...

Software Engineer

Location
City of Westminster, England, United Kingdom
behalf of banks, under real SLAs and bank-grade security. We're AI-native in how we build, not just what we sell: LLM evals score 100% of our conversations, adversarial agents attack every change before it reaches production, and our CI/CD runs its own AI agents : reviewing ...

Senior Vice President, Full-Stack Engineer

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
computer science or a related discipline, or equivalent work experience required; advanced degree preferred Strong hands-on experience with Python, ML frameworks, and LLM/GenAI tooling. Strong hands-on experience with AI Development tools like Claude CLI, Windsurf Solid understanding of the ML lifecycle; exposure to model risk ...

Senior Software Developer

Hiring Organisation
Youngs Employment Services
Location
WC2H, Covent Garden, Greater London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum Bonus
Experience Exposure to React or React Native, particularly where APIs support web or mobile products. Experience with retrieval-augmented generation, vector search or integrating LLM-based features into production products. Experience working in a scale-up, transformation programme or small permanent technology team. Salary: c£65,000-£75,000, with ...

Integration Engineer - AI Pipelines

Location
City of Westminster, England, United Kingdom
based environments. Experience with video curation or data preparation frameworks, or with building scalable batch and streaming data pipelines. Experience with multimodal AI, including LLM or VLM APIs, image and video understanding, embeddings, structured outputs, tool or function calling, and retrieval-augmented generation. Experience deploying and optimising AI inference workloads ...

Director, Security Engineering

Location
City of Westminster, England, United Kingdom
enterprise customer on the same incident and land it with all three. Nice to have: securing AI product features, OWASP Top 10 for LLM Applications, the NIST AI Risk Management Framework, MITRE ATLAS, SOC 2, or ISO 27001. Education Degree in a STEM field, preferably Information Security or Computer Engineering ...

Senior AI Transformation Lead

Location
City of Westminster, England, United Kingdom
shipped code and earn the mandate to scale a dedicated team. What You’ll Do Ship Code: Design, code, and deploy custom AI agents, LLM pipelines, and system integrations from scratch. Automate Core Operations: Sales: Lead gen tools, personalized outreach, pipeline tracking. Finance: Automated timesheet reconciliation, invoicing checks ...

Senior Partner Agent Architect (UK)

Location
City of Westminster, England, United Kingdom
within complex enterprise environments. You will also help shape the conversational experience layer by translating customer requirements into AI Agent behavior through prompt engineering, LLM concepts, and conversational design. Prior conversational design experience is valuable but can be further developed on the job. You will work closely with strategic partners ...

Staff Software Engineer, Labs Science

Location
City of Westminster, England, United Kingdom
changing environment. Design and implement sophisticated agentic systems and multi-step AI prompts to solve complex, open-ended scientific tasks using the latest LLM reasoning advancements. Establish frameworks and metrics to measure model performance, driving continuous quality improvements and model fine-tuning for specific scientific use cases. Work closely with ...

Data Scientist Manager

Location
Westminster, West End, United Kingdom
Our client is a UK digital technology and software consultancy. Join our client and Shape the Future We're problem solvers, innovators, and collaborators - driven by a shared mission to create real impact. Whether we ...

Staff Software Engineer, Google Health Coach

Location
City of Westminster, England, United Kingdom
years of experience testing, and launching software products. 3 years of experience with software design and architecture. Experience integrating generative AI tools or LLM interfaces into workflows. Preferred qualifications: Master’s degree or PhD in Engineering, Computer Science, or a related technical field. 8 years of experience with data structures ...

Assistant Director -Data Science

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
Our client is a global credit ratings and risk analytics firm. Is this your next job Read the full description below to find out, and do not hesitate to make an application. We unite the ...

Apps Growth Consultant

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
product management or business operations role at a mobile app developer. Experience working with data visualization tools to deliver results. Experience working with LLM tools, creating context documents, evaluating outputs. Experience using SQL to retrieve data from large data warehouses, or excellent technical abilities and a desire to learn SQL. ...

AI Platform Engineering Lead for Market Research

Location
City of Westminster, England, United Kingdom
functional team, shaping the product roadmap, fostering best practices, and driving adoption of cloud-first technologies across Azure, PostgreSQL, MongoDB, and a multi-provider LLM stack. #J-18808-Ljbffr ...

Security Architect

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
industry forums) Good combination of creative and analytical skills, able to deliver complex documents and "connect the dots". Might haves: Experience in AI (LLM) security, guardails, DLP, understanding of risk such as Prompt Injection and Model Poisioning etc. Good understanding of Telecoms Security Act requirements, contained with the Code ...

AI Platform AVP — Enterprise Product Manager

Location
City of Westminster, England, United Kingdom
platform secure, scalable, and extensible. You'll focus on governance, administration, security, and enablement features for AI agents and workloads at scale across the LLM gateway, MCP gateway, agent runtime, and model governance. You will translate complex platform requirements into self-service experiences for builders, partner with Platform Eng/ ...

Engineering Team Lead | Tech | London, UK

Location
City of Westminster, England, United Kingdom
driving further adoption of cloud first technologies; we are Azure based, with PostgreSQL and MongoDB as our primary data stores and a multi-provider LLM stack (OpenAI, Google Gemini and Anthropic). We want you to dive in, get your hands dirty, and figure things out, but also … setting objectives and assisting with tailored development plans Our engineering environment includes technologies such as Python (FastAPI), LangChain/LangGraph for multi-agent LLM orchestration, React/TypeScript, PostgreSQL, MongoDB, Redis, Azure (App Service, Container Registry, Blob Storage), Docker, GitHub Actions, and modern CI/CD pipelines. About ...

Senior AI Deployment Engineer

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
building, agent workflows and orchestration, agent hosting and sandboxing, guardrails, evals, RAG and context engineering, and tokenomics (cost, latency, model selection). Production-grade LLM system experience is the core requirement. You will work on three types of project: Departmental engagements. Embed with departments to AI-enable tasks and processes … more sophisticated way than "just ask Claude" - for example, Python pipelines where one step is an LLM API call - delivering real incremental value with each engagement and transforming working patterns into load-bearing, AI-enabled business processes. Customer-facing AI deployment. Deploy and integrate AI components built ...

Hybrid AI Security Consultant: AI & Agentic Security

Location
City of Westminster, England, United Kingdom
Consulting is seeking an AI Security Consultant to help organisations secure AI-enabled environments, including LLM integrations and agentic systems. You will advise clients on core cyber security risks across cloud, identity, data and governance while addressing AI-specific risks that enable AI systems to reason, retrieve data, call tools ...

Software Engineer III - Data Analytics Platform

Hiring Organisation
Hackajob Ltd
Location
Westminster, Greater London, UK
provide an adventure where you can push the limits of what's possible. As a Software Engineer III at our client within the Firmwide LLM Serving Platform team, you are an integral part of an agile team that designs, builds, and operates the services that make large language models usable … optimize performance — pushing down latency, increasing throughput, maximizing GPU utilization, and eliminating waste across the request lifecycle. Job responsibilities Build core backend services for LLM inference, including request routing, batching, scheduling, streaming responses, and quota/limits. Implement and maintain APIs and SDKs used by product and application teams across ...