Lead Software Engineer Python Java Jobs in London, UK

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Remote AI Engineer & Technical Product Owner

A leading tech company based in the United Kingdom is seeking an AI Engineer (Technical Product Owner) to help build an internal tool for Meta ads. This role combines product thinking with backend engineering, focusing on designing the system and collaborating with founders to drive growth. Ideal candidates will ...

Senior Build & Release Engineer C++/CI Automation

Foundry is seeking a Senior Engineer for the Engineering Experience team in Greater London. The role focuses on optimizing the C++ build stack to enhance feature delivery and reduce friction in the development lifecycle. Responsibilities include managing complex third-party dependencies, mentoring engineers, and ...

Principal AI Engineer: Production Grade LLM & RAG Architect

La Fosse is seeking a Principal AI / ML Engineer to build an AI Labs capability in the Greater London area. This senior role involves leading the design and delivery of AI/ML systems, integrating AI capabilities into enterprise platforms, and communicating solutions to diverse stakeholders. Ideal candidates shou ...

Senior Backend Engineer — AI Workspace & Data Pipelines

TechTree is seeking a Senior Backend Engineer to design and implement robust backend systems for an AI workspace in Greater London. The successful candidate will have over 7 years of experience, expert-level proficiency in Python, and deep knowledge of relational databases, particularly PostgreSQL. Responsibilit ...

Senior Backend Engineer — AI Powered Microservices & LLMs

Weekday AI is seeking a Senior Backend Engineer to build and scale intelligent backend systems for AI-driven applications in London. You'll design robust APIs, create scalable microservices, and integrate advanced AI capabilities like Large Language Models. Collaborating with cross-functional teams, you'll focus ...

AI Agent Engineer for Autonomous Business Platform

Homerun B.V. is seeking a full stack AI engineer to design, build, test, and deploy production-grade AI agents. You will own agents end-to-end using modern frameworks like LangChain and Google ADK, and deploy using Docker and GCP. Ideal candidates will have at least 1 year of professional Python experience and k ...

Backend‑First Full Stack Engineer for AI Platform — Equity

Jack & Jill is looking for a Full-Stack Engineer (Back-End Leaning) in London, UK, to join their elite engineering team. You will own backend architecture and build scalable systems for a high-growth AI platform. The role encompasses designing robust backend systems, maintaining API infrastructure, and making ar ...

Senior Platform Engineer ML/GenAI Infra, Equity (Hybrid)

Dex is seeking a Senior Platform Engineer in London, offering up to £200,000 + equity. The ideal candidate will have a track record of building platforms for engineering teams, with expertise in languages like Python or Go. Responsibilities include designing and operating core services, and owning developer expe ...

Network Automation Engineer — Hybrid London | Modernize & Automate

Ashdown Group is looking for a Network Automation Engineer to enhance a global enterprise network from their London office. The role involves driving network automation initiatives, improving efficiency, and supporting infrastructure modernisation projects. Candidates should have strong experience in network aut ...

Senior ML Engineer: Generative AI & Production Pipelines

DNEG in Greater London is seeking a Machine Learning Engineer to help build cutting-edge generative systems for video and audio synthesis. The ideal candidate will have experience deploying ML systems, a strong understanding of deep learning, and proficiency in Python. You will work cross-functionally with resea ...

Azure Databricks Data Engineer for Reliable Pipelines

A leading technology and finance consultancy in Greater London is seeking an experienced Data Engineer. In this role, you'll design and implement reliable data pipelines that are trustworthy and observable. You must have over 6 years of experience in data engineering, a strong command of Python, and familiarity ...

VP, GenAI Data Platforms & Product Engineering

A global financial services company is looking for a full-stack engineer to join their team in London. This unique opportunity involves building foundational systems for an AI assistant that will support employees globally. You will design and build evaluation frameworks and data pipelines, ensuring safety and q ...

Senior ML Engineer: End to End Real World AI Delivery

Lorien is looking for a Senior Machine Learning Engineer to join their multidisciplinary data and AI team in Greater London. This senior, hands-on role involves taking ownership of complex machine learning problems and delivering high-impact solutions in a secure environment. Candidates should possess strong Pyt ...

DevOps Engineer Kubernetes, AWS & CI/CD Expert

A leading financial services organisation is seeking a DevOps Engineer in London. This pivotal role involves designing and maintaining CI/CD pipelines, managing Linux environments, and utilizing AWS services. The ideal candidate will have strong skills in Python and Kubernetes, and a passion for automation and c ...

Cheminformatics Engineer AI for Drug Discovery

A leading biotech company in Greater London is looking for a detail-oriented Cheminformatics Engineer to develop transformative technology enhancing drug design productivity. The ideal candidate will have a Master's or PhD in Computational Chemistry or AI, advanced proficiency in Python, and strong communication ...

Trading Infra Support Engineer (L1/L2) High Availability

A technology firm in Greater London is seeking a Trading Infrastructure Support Engineer to ensure high availability of critical services. The role involves providing L1/L2 support across services globally, monitoring systems, and troubleshooting issues. Ideal candidates will have over 4 years of support experie ...

Threat Driven InfoSec Engineer: Detection & Defense

A technology firm in Greater London is seeking an Information Security Engineer responsible for securing their infrastructure globally. The ideal candidate should have over 3 years of security experience across major platforms and proficiency in scripting languages like Python. Key responsibilities include build ...

Senior French Prompt Engineer for Clinical AI Remote

A consulting firm specializing in AI solutions is seeking a Senior French-speaking Prompt Engineer / Applied Research Scientist. This remote role focuses on designing and optimizing prompts for AI-powered clinical documentation systems. Candidates should have over 5 years of experience in prompt engineering, str ...

Hybrid Senior Revenue Engineer: Pricing & Data Pipelines

A global urban mobility platform is seeking a Senior Revenue Engineer to enhance their pricing infrastructure. This role involves designing scalable solutions and collaborating across teams to improve pricing models and systems. The ideal candidate has over 5 years of backend engineering experience, particularly ...

Detection Engineer: Cloud Security & Incident Response

A leading telehealth platform is seeking a Security Engineer with expertise in detection as code. You'll own the detection and security operations, writing rules, building telemetry pipelines, and responding to cloud-native threats. Strong programming skills in Python or TypeScript are essential, along with expe ...

Security‑Focused Backend Engineer

A leading technology firm in Greater London is seeking a Security & Backend Engineer to enhance its core data solutions. The ideal candidate will own backend services and ensure data and system security, balancing feature delivery with long-term hardening. You should have over 5 years of experience in operating ...

Senior Frontend Engineer for AI Platform UI

A leading cloud technology company in Greater London seeks a Fullstack Engineer with a strong frontend focus to enhance their AI platform. You'll collaborate closely with design and backend engineers to create fast and intuitive workflows for users. A suitable candidate has substantial experience in React, TypeS ...

Senior DevOps Engineer AWS, Terraform & Kubernetes

A global-leading investment management firm is seeking a DevOps Engineer for a 12-month contract in London. The role includes responsibilities such as building AWS infrastructure, managing Terraform, and developing Kubernetes platforms. Candidates should have over 5 years of experience in DevOps, strong AWS and ...

AI Solutions Engineer — Enterprise ML & Data Integration

A leading AI infrastructure firm in Greater London seeks a Machine Learning Solutions Engineer to act as a technical expert for complex customers. The role involves partnering with commercial teams, leading technical discovery sessions, delivering customized demonstrations, and guiding prospects through evaluati ...

Senior AI Solutions Engineer Enterprise Pre Sales (Hybrid)

A leading AI solutions provider in the UK is seeking a Senior Solutions Engineer to bridge technical and sales efforts. This role involves designing AI-driven solutions, executing proof-of-value projects, and leveraging extensive knowledge in Python and APIs. Ideal candidates will excel in navigating enterprise ...

Hybrid DevOps Engineer — CI/CD & Automation

A leading technology company is looking for an innovative DevOps Engineer to drive the design and development of CI/CD pipelines and automation tools. This role requires expertise in advanced scripting with languages such as Python, Bash, and PowerShell, and a solid background in systems administration. The posi ...

ML Engineer — Investment AI for Professional Investors

A leading investment AI firm based in London is seeking a Machine Learning Engineer to design and deploy AI systems that power investment insights. The ideal candidate will have at least 5 years of experience in production ML or AI systems and strong Python skills. You will integrate advanced models and enhance ...

Senior Trading Systems Engineer Hybrid, Linux & SQL

A leading trading firm in the UK is seeking an experienced Trading Application Engineer. This role requires proficiency in scripting languages such as Python and Bash, strong problem-solving skills, and familiarity with Linux environments. The position is hybrid, offering a competitive compensation up to GBP150, ...

AI Engineer Production Grade LLM Solutions (London)

A global benefits leader is seeking an AI Engineer to develop and implement production-grade AI solutions that address real-world challenges. The ideal candidate will manage cloud infrastructure, collaborate across teams, and mentor peers, contributing to product improvements and internal tooling. Proficiency in ...

Network Automation Engineer: Scalable, Self Service Infra

A leading quantitative finance firm in London is seeking a Network Automation Engineer to transform network delivery across their global infrastructure. You will design and build automation frameworks, tooling, and APIs that make networking scalable and efficient. The ideal candidate will have a solid understand ...

Senior Backend Engineer Health Data Platform & APIs

A technology company focused on health data is seeking an experienced backend engineer to own and ship core platform systems. The candidate will design and implement solutions for ingesting and normalizing health data from various sources, manage APIs, and ensure the platform's reliability and security. Proficie ...

Real Time Cloud Data Platform Engineer – Analytics & Streaming

A data solutions company is seeking a Cloud Data Platform Engineer in London. The role involves designing and scaling data platforms for analytics and streaming. Candidates should have strong experience with AWS, Google Cloud, or Azure, as well as skills in SQL and Python. The position requires collaboration wit ...

Senior ML Platform Engineer: Scalable, Automated AI Infra

A leading AI video platform company in London seeks a Senior Engineer for the ML Platform team. This hands-on role involves designing platform systems for model training and production, enhancing reliability and scalability. Ideal candidates have strong experience in cloud infrastructure, reliability, and coding ...

Senior Research Engineer Interactive Avatars (Remote)

A leading AI video platform is seeking a Research Engineer to join its R&D team in London. This role focuses on developing cutting-edge generative AI solutions for avatar-centric interactive videos. The ideal candidate should have robust experience in machine learning, particularly with diffusion models, and pro ...

Senior ML Platform Engineer Scale ML Pipelines & Serving

A leading food delivery service in Greater London is searching for a Senior Machine Learning Platform Engineer to enhance their platform for machine learning models. In this hybrid role, you will create infrastructure for training and deployment, ensure efficient collaboration across teams, and build scalable so ...

HPC Infrastructure Engineer Linux, Slurm, GPU, Kubernetes

A recruitment agency is seeking an HPC Engineer to join their team in the United Kingdom. You'll work on some of the largest and most performant HPC Infrastructure in Europe. Ideal candidates should have a strong Linux background with packet management, experience in GitOps, Configuration Management, Infrastruct ...

Senior Backend Engineer — AI Platform & Microservices

A leading media company in Greater London is seeking a Senior Backend Engineer to join their Emerging Tech team. The role focuses on building backend systems for a multimodal AI platform, requiring expertise in TypeScript or Python and experience with cloud platforms such as GCP. Responsibilities include develop ...

Search ML Engineer Intern Retrieval & Ranking in London

A technology company in Greater London is seeking a Search Machine Learning Engineer Intern to contribute to advanced search technologies. This full-time, in-person internship lasts 12-24 weeks. Candidates should have a strong foundation in machine learning, especially with Python and familiar ML frameworks like ...

Senior macOS Endpoint & Automation Engineer

A leading design platform in Greater London is seeking an IT Engineer focused on macOS endpoint management. This role involves streamlining device workflows, enhancing security, and automating tasks. Ideal candidates should have over 5 years in enterprise macOS management, proficiency in Bash and Python, and exp ...

Detection Engineer — Cloud Native Security (Remote)

A leading telehealth company is seeking a Security Engineer to develop detection engineering capabilities and security operations. You will create detection rules, build effective telemetry pipelines, and engage in security analyses, all while maintaining a focus on innovation and high-impact solutions. Applican ...

Senior ML Research Engineer — Retail Foundation Models

A pioneering startup in Greater London is searching for a Senior Research Engineer to innovate in machine learning for retail. The role involves applying state-of-the-art techniques to create impactful solutions and optimise models for production systems. Candidates should have a strong background in machine and ...

Backend Engineer Green Energy Platform & Global Growth

A leading digital energy supplier in London is seeking a Backend Engineer to join their team focused on business energy solutions. The role requires expertise in Python and Django, with an emphasis on building reliable and efficient systems. The ideal candidate will collaborate across teams to innovate while pre ...

Senior Network Observability Engineer — Hybrid & Impactful

A cutting-edge tech company is seeking a Senior Engineer for Network Observability to join their team. You will design and maintain systems that monitor network performance, using tools like Prometheus and Grafana. The ideal candidate has a strong background in Python, experience with Kubernetes, and is passiona ...

Senior Full Stack Engineer (Remote) Scalable APIs & UI

A leading recruitment agency is seeking a Senior Full Stack Engineer for a 12-month remote contract. The ideal candidate has at least 4 years of experience in Python and Flask, along with a strong grasp of SQL databases. Responsibilities include architecting backend services and building responsive front-end int ...

Senior ML Engineer: Build & Deploy Real World AI

A leading data science firm in Greater London is seeking a Senior Machine Learning Engineer to design and implement cutting-edge data science solutions. The role requires expertise in Python and machine learning frameworks, alongside strong communication skills to convey complex concepts. You'll collaborate clos ...

Senior ML Engineer – Care AI for Trust & Support

A leading food delivery service is seeking a Senior Machine Learning Engineer to join their Care team in London. The role involves enhancing customer experience through machine learning solutions that support automated customer support and fair compensation decisions. Ideal candidates have over 5 years of experi ...

Finance Data Engineer – Contract for Modern Data & Analytics

A leading financial services provider in London seeks an experienced Data Engineer to enhance Finance & Treasury reporting through scalable data solutions. The role involves developing data pipelines, managing core data infrastructure, and ensuring data security. Candidates should possess extensive SQL skills, e ...

Senior Backend Engineer — Architect Scalable Microservices

A leading global marketing firm in Greater London seeks a Senior Backend Engineer to design and develop backend systems across its platform. In this hands-on role, you'll implement scalable and secure services, ensuring high engineering standards. Ideal candidates will have expertise in Python, FastAPI, and clou ...

AI Learning Experience Engineer for Adaptive EdTech

A leading EdTech company in London is seeking an AI Learning Experience Engineer to design and deploy AI-driven educational solutions. The ideal candidate will have hands-on experience with LLMs and AI tutoring systems, along with strong Python and AI/ML skills. Responsibilities include designing adaptive learni ...

Head of Engineering

About Echobox: We are a fast‑growing, research‑driven company building an artificial intelligence that helps online publishers overcome the challenges they face every day. Using novel AI, we are revolutionising the publishing industry and have a track record of building things that others have ru ...

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