Lead Software Engineer Python Java Jobs in London, UK

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Manager, AI Deployment Engineering Codex

About the teamThe AI Deployment Engineering team is responsible for ensuring the safe and effective deployment of OpenAI technologies across developers and enterprises. We act as trusted technical partners, helping customers move from experimentation to production by designing, imp ...

Manager, AI Deployment Engineering Codex

About the teamThe AI Deployment Engineering team is responsible for ensuring the safe and effective deployment of OpenAI technologies across developers and enterprises. We act as trusted technical partners, helping customers move from experimentation to production by designing, imp ...

Database Platform Engineer

We tackle the most complex problems in quantitative finance, by bringing scientific clarity to financial complexity. From our London HQ, we unite world‑class researchers and engineers in an environment that values deep exploration and methodical execution - because the best ideas take time to evolve ...

Senior Data Scientist

Direct message the job poster from Harnham I’m working with a mission-driven healthcare technology company that leverages real-world data to improve health outcomes and equity. They focus on understanding the complex social and behavioral factors that influence healthcare decisions, going beyond tradit ...

Junior Game Developer

Founded in 1999 and premium listed on the Main Market of the London Stock Exchange, Playtech is a technology leader in the gambling industry with over 7,000 employees across 20 countries. Playtech is the gambling industry's leading technology company delivering business intelligence-driven gambling ...

Security Engineer, Amazon Application Security

DescriptionAt Amazon, security is central to maintaining customer trust and delivering delightful customer experiences. Our organization is responsible for creating and maintaining a high bar for security across all of Amazon’s products and services. We offer talented security professionals the chance to acc ...

Site Reliability Engineers

Position Description CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a m ...

Principle Dev Ops Engineer

Sporting Solutions is a product led, technology-driven company that sources, generates, and distributes real-time sports betting data. Our systems operate under tight performance demands low latency, high throughput, and ongoing reliability. We’re working to continually improve our platforms and are evolvi ...

Product Support Engineer

Join the Product Support Engineer role at CoMind . At CoMind, we are developing a non‑invasive neuromonitoring technology that will usher in a new era of clinical brain monitoring. In joining us, you will help create cutting‑edge technologies that improve how we diagnose and treat br ...

On Site IT Support Engineer London

Job Title: On-Site IT Support Engineer (Level 1/2) - London Client: Logistics company Location: London, England (UK) (On-Site:) Duration: Backfill/on-going | Start: ASAP Rate: On application Your Mission Join a dynamic team as a Level 1/2 IT Support ...

Senior Electrical Engineer

Job Title: Senior Electrical Engineer Salary: up to £65,000 DOE Location: London, UK Job Type: Permanent An exciting opportunity has arisen for a Senior Electrical Engineer to join a well-established ...

Data Engineer

Data Engineer Salary: £70K – £80K Location: London – Flexible working Data Idols are working with a fast-growing, product-led tech company to hire a Data Engineer and help shape the data platform. You’ll take ownership of data pipelines, infrastruct ...

DevOps Specialist

Required Qualifications 10- 15 yrs years' experience in Cloud/DevOps/SRE with hands-on delivery on Google Cloud Platform (GCP) Strong Infrastructure as Code skills with Terraform (modules, state management, policy controls) CI/CD implementation experience (Cloud Build/Je ...

AI Platform Engineer Hedge Fund Up to £160k base

You'll own the AI platform powering experimentation across a £70bn hedge fund. This is a rare opening at a tier one firm investing heavily into AI while most of their peers are still talking about it. You're joining a lean operation, just 600 people managing £70bn, and senior leadership see ...

Pricing Manager

Arthur is delighted to be supporting a manager role within the pricing function for a speciality insurer. You will be leading a team and supporting the Head of Technical and Specialty Pricing in managing the development and delivery of pricing models across both local and global business lines. The ...

AI Platform Engineer Hedge Fund Up to £160k base

You'll own the AI platform powering experimentation across a £70bn hedge fund. This is a rare opening at a tier one firm investing heavily into AI while most of their peers are still talking about it. You're joining a lean operation, just 600 people managing £70bn, and senior leadership see AI a ...

Computer Science ECT | Islington (Exceptional Secondary)

Write a short description of your company, a boilerplate of the business, service or product that you offer. Include your business idea and the target audience. This text is primarily supposed to be descriptive, not selling.We are working with an Exceptional rated academy in Islington to fi ...

Computer Science ECT | Islington (Exceptional Secondary)

Write a short description of your company, a boilerplate of the business, service or product that you offer. Include your business idea and the target audience. This text is primarily supposed to be descriptive, not selling.We are working with an Exceptional rated academy in Islington to fi ...

Marketing AI Engineer: Build Production ML for Campaigns

A marketing technology company in London seeks an experienced Machine Learning Engineer to develop and deploy ML systems specific to marketing workflows. You will collaborate with product and engineering teams to ship reliable AI tools that significantly enhance marketing operations. The ideal candidate has stro ...

Full Stack Engineer — AI for Litigation, London

A legal AI startup in London is seeking a full-stack engineer to architect and develop document analysis systems powered by advanced AI. You will collaborate with a founding technical team, contribute to the ambitious product roadmap, and shape the culture of the organization. Required skills include strong expe ...

Agentic AI Engineer: LLM Ops for Generative Banking

A leading technology firm in Greater London is looking for a skilled AI Engineer to develop innovative AI products for the Conversational Banking Lab. The role involves creating infrastructure for agent workflows across Azure and GCP, and expertise in Python, AI Engineering, and microservices is essential. The i ...

Senior Linux Engineer – Global, Automation & Kubernetes

A market-leading trading firm located in Greater London is seeking a talented Linux Engineer to manage and maintain their extensive Linux server estate. You will design, build, and support medium-sized Linux environments while ensuring high performance and stability. The role emphasizes simplification and automa ...

AWS Data Engineer: Real Time Pipelines & DBT/Airflow

A leading media organization in Greater London is seeking an experienced AWS Data Engineer to develop and maintain end-to-end data pipelines. You will be responsible for integrating real-time data streams and third-party APIs into the analytics stack, while promoting modern tooling and collaboration. Candidates ...

Senior Algorithm Engineer – ML Driven Underwriting & Risk

A leading insurance technology firm in Greater London is seeking a Senior Algorithm Engineer to join their Algorithmic Underwriting team. In this role, you will design and enhance machine learning-enabled products for various insurance classes. You'll work at the intersection of technology and specialty insuranc ...

Full Stack Engineer — AI Economics Platform (London, 4d/wk)

A tech-driven company in London is looking for a Full-Stack Engineer to help build a new platform focused on AI agent costs and margins. You will have full technical ownership of the architecture while collaborating with experienced founders. Ideal candidates should have 3+ years of experience in backend systems ...

Senior Azure Data Engineer: Databricks & Delta Lake

A leading consulting firm is seeking a Senior Azure Data Engineer to design and develop scalable data solutions on the Databricks platform. This role will involve hands-on tasks such as building robust data pipelines, collaborating with clients to address their data challenges, and applying DevOps principles. Th ...

AI Driven Data Analyst & Engineer (Pilot Programs)

A leading technology firm in the UK seeks a Data Analyst / Engineer to join their Forward Deployed Engineering team. You will partner directly with customers during trials, transforming complex data into insights that drive AI procurement solutions. Ideal candidates will have over 2 years of experience, be fluen ...

AI Enablement & Engineering Leader

A global financial services firm in Greater London is looking for an experienced AI Governance Engineer to support the implementation of AI solutions. This role involves translating governance principles into practical frameworks, ensuring that AI initiatives are secure and well-governed. The ideal candidate wil ...

Full Stack AI Engineer — UX‑Driven, End to End Delivery

A global advisory firm in London is seeking a Full Stack Engineer to join their pioneering AI Lab. The successful candidate will be responsible for designing and delivering scalable AI-enabled solutions while engaging with stakeholders. The role requires strong Python development skills, experience in full-stack ...

Senior Product Security Engineer: Cloud & SDLC Champion

A global quantitative investment firm is seeking a Senior Product Security Engineer to enhance security across various tech systems, including cloud services and business applications. The role involves driving automated security processes, conducting assessments, and mentoring engineering teams. Candidates shou ...

Research Engineer Insights AI Agents & Data Synthesis

A leading technology research firm in the United Kingdom is seeking a Research Engineer focused on Insights AI Agents. This role involves designing and maintaining systems for data extraction and analysis, enabling data-driven decision-making. Candidates should have a degree in Computer Science and at least 2 ye ...

AI Driven Product Engineer for Legal Tech Platform

A pioneering legal services firm in Greater London is seeking a Product Engineer to join their founding engineering team. This role focuses on building client-facing platforms that enhance the legal experience through automation and intuitive design. The ideal candidate will have over three years of experience i ...

Remote UK Cloud SRE: Automation & 24/7 Reliability

A leading healthcare technology company is seeking a Site Reliability Engineer to ensure the reliability and efficiency of its cloud environments. This role involves developing automation processes, supporting cloud operations, and participating in incident management while providing 24×7 shift-based support. Th ...

Senior Data Engineer: Remote First, Azure Synapse & Fabric

A leading IT company in the United Kingdom is looking for a Senior Data Engineer to help shape data-driven transformation for clients. You will work with technologies such as Microsoft Azure Synapse and Power BI, delivering scalable data solutions. This customer-facing role requires experience with data integrat ...

Senior AI Engineer (London) — LLMs, RAG & Agents

A leading data & AI consultancy in London is seeking a Senior AI Engineer to design and build cutting-edge systems using LLMs. This role will involve implementing RAG architectures and taking AI concepts into real-world applications across industries such as financial services, energy, and healthcare. The ideal ...

Azure Data Engineer | SC Cleared | Hybrid UK Databricks

LA International is seeking an experienced Azure Data Engineer for a 3-month contract outside IR35. The role requires extensive expertise in Azure Databricks, Azure Data Lake Storage, and Azure Data Factory, along with advanced skills in SQL, Python, and Spark (PySpark). Candidates must hold security clearance. ...

ML Engineer — Equity, 4‑Day Week, London Office

Digital Waffle in Greater London is seeking a Machine Learning Engineer to join their AI-driven start-up. You will design and deploy ML-powered features, work with Python and TypeScript, and fine-tune NLP models. This position offers a salary of £80,000 - £100,000, equity, and the chance to influence the technic ...

AI‑Powered Product Engineer (London)

RGH-Global Limited, based in London, is hiring a Product Engineer to drive the development of a client-facing platform from the ground up. This role involves end-to-end building, focusing on modern web applications and user experience. Ideal candidates should have over 3 years of experience in frontend developme ...

Remote GCP Cloud Engineer & Architect (Terraform/K8s)

La Fosse is seeking an experienced Cloud Engineer to join a central platforms team, primarily remote. You will design, deliver, and optimise secure, scalable cloud infrastructure mainly using Google Cloud Platform (GCP). This hands-on contract role emphasizes automation, reliability, and modern engineering pract ...

Forward Deployed AI Engineer for Enterprise Apps

A leading AI technology company is looking for a Forward Deployed Engineer in Greater London. In this role, you will engage directly with customers to implement advanced AI solutions and help drive transformational AI adoption. You’ll leverage your programming skills and experience with LLMs to build production ...

Senior Conversational AI Research Engineer

An innovative AI technology company in Greater London is seeking a Senior Research Engineer. This role involves building industry-leading conversational AI models and taking them from idea to production. The position requires strong engineering skills to enhance AI capabilities, optimize user experience, and col ...

Climate Impact ML Engineer – Hybrid London

A tech-focused company in Greater London is seeking a junior to mid-level Machine Learning Engineer to join their impact-oriented team. The role involves utilizing Python and Git, particularly PyTorch, with a focus on lowering carbon emissions. The position offers a hybrid working model, combining office and rem ...

AI/ML Platform Engineer – LLMs for HealthTech

A leading health technology company in Greater London is seeking an AI/ML Platform Engineer to develop and maintain cutting-edge AI systems. You will optimize large language models specific to health applications and design automated pipelines to enhance model performance. The ideal candidate has 4+ years of mac ...

Senior AI Engineer – Enterprise GenAI & Responsible AI

A leading AI solutions provider in London seeks an experienced AI engineer to develop high-performance AI applications that power the future of work. You will be responsible for architecting and deploying scalable AI solutions, collaborating with diverse teams, and ensuring ethical AI practices. The ideal candid ...

Cloud Security Engineer: Automation & IAM Foundations

A leading cloud security firm in Greater London is seeking a hands-on Cloud Security Engineer responsible for the security architecture of a multi-tenant core banking platform. The role involves designing automated security tooling, managing cloud identity and infrastructure with Terraform, and safeguarding agai ...

MarTech Backend Engineer — Privacy First Stack

A leading technology company in Greater London is seeking a Backend Engineer to enhance their marketing technology stack. The successful candidate will design and implement key components, integrate solutions across teams, and improve user conversion and experience. Ideal applicants will have strong experience i ...

Founding Engineer: AI Native Insurance Platform (London)

A cutting-edge insurance startup in London is looking for a Founding Engineer to join their Strategic Projects team. You will architect end-to-end AI-native systems that manage real-world insurance risk and compliance. The ideal candidate should have 2-4 years' experience in producing scalable solutions, with st ...

Senior ML Engineer – Production LLMs for Global Brands

A promising AI startup in London is seeking a Senior ML Engineer to design and implement production ML systems for high-profile clients. You will play a crucial role in transforming marketing operations through cutting-edge AI solutions. Ideal candidates possess 4-8 years of experience in ML system development, ...

Lead Architect: Autonomous AI Agents & Multi Agent Systems

A leading global financial services firm in Greater London is seeking an AI Engineer to design and deploy innovative AI solutions. In this role, you’ll enhance operations by creating scalable, multi-agent systems and collaborate with cross-functional teams to achieve impactful results. The ideal candidate holds ...

Senior Fullstack Engineer: AI Driven Internal Tools Remote

InfluencerUpdate is looking for a skilled engineer to join their team in London. The role involves building fullstack features for Midnite's internal back office platform, working closely with Product, Design, and engineering teams. Candidates should have over 5 years of experience in both frontend and backend d ...

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