Lead Software Developer Python Jobs in UK

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Senior Workflow Orchestration Engineer

A leading financial technology company in London is seeking a Senior Software Engineer in Workflow Orchestration. The successful candidate will develop internal and client-facing APIs, work with distributed systems, and be part of an innovative team tackling workflow management. This role requires proficiency in ...

Security Cleared Senior Software Engineer: Cloud & Backend

Forwardrole is looking for a Senior Software Engineer based in Cheltenham, England. In this role, you'll design, develop, and maintain vital infrastructure while tackling complex challenges and using cutting-edge technology. The ideal candidate will have strong hands-on experience in Java, JavaScript, or Python, ...

Senior Software Engineer Enterprise Data Acquisition

A prominent financial technology company seeks a Senior Software Engineer for its Data Acquisition team in London. The role involves designing and building core services that define Bloomberg’s enterprise data model. Candidates should have over 4 years of experience with C++ or Python and a solid understanding o ...

Senior Software Engineer, Total Fund Management (Public Markets) Hybrid

Une organisation d’investissement mondiale recherche un(e) Senior Software Engineer dans le domaine de la technologie des marchés publics. Le candidat idéal aura plus de 5 ans d'expérience, une forte maîtrise des langages de programmation comme Python, C++, et Java, et sera capable de concevoir et de soutenir de ...

Senior Software Engineer – Middle/Back Office (Finance)

Alexander Ash Consulting is seeking a Software Engineer specializing in Middle/Back Office systems for a contract role in London. The ideal candidate has over 8 years of experience in developing enterprise systems with Python and/or Java, a deep understanding of financial products, and experience with AWS and AI ...

Senior Data Scientist – Risk & Insights Leader

Fitch Solutions is seeking a Data Scientist to join their team in London or Manchester. The role involves designing and deploying quantitative models to power advanced analytics and insights for clients across various sectors. Candidates should have experience in data querying, machine learning, and tools such a ...

Senior Software Engineer – AI for Sustainable Construction

AECOM in Greater London is seeking a Senior Software Engineer to join their AI Engineering team. In this role, you will design and build platform services, ensuring ML models run reliably while optimizing AI workloads using technologies like Docker and GitHub Actions. The ideal candidate will have strong program ...

Senior Simulation Engineer Robotics & Visual Fidelity

Wayve is seeking a Software Engineer for the Simulation Technology team in Greater London. This full-time role involves expertise in evolving core components of Wayve's simulation platform, focusing on video fidelity and robot emulator fidelity, among others. The ideal candidate has over 5 years of industry expe ...

Hybrid Digital Roads Engineer Data Driven & Innovative

WSP in the UK & Ireland is seeking a Digital Engineer to join the Roads team in Basingstoke or other UK locations. The role involves delivering innovative highway solutions and applying digital tools to enhance engineering outputs. Candidates should possess skills in highway engineering principles, data handling ...

Automation QA Engineer UI/API & CI/CD

IBM in Greater London is seeking a Quality Engineer with automation experience to develop reliable automated tests. You will collaborate with cross-functional teams and utilize modern tools like Selenium and Cypress. Responsibilities include creating automated tests, supporting CI/CD integration, and ensuring qu ...

Staff SRE: Scale, Reliability & Cloud Native Systems

Genesis AI, located in the Greater London area, seeks a software engineer to tackle challenges related to reliability, scalability, and system performance. The successful candidate will design and optimize distributed systems using technologies such as Kubernetes and Python. Responsibilities include driving solu ...

AI Agent Evaluation Engineer Part Time, Project Based

Mindrift is seeking experienced developers or software engineers for part-time, project-based roles evaluating AI coding agents. Responsibilities include creating tasks and evaluation criteria within simulated environments and reviewing AI-generated code. Ideal candidates will have a degree in Computer Science, ...

Senior Test Engineer (Contract) – CI/CD Quality by Design

Nixor is seeking a Senior Software Engineer in Test for a groundbreaking role in Manchester. This contract position emphasizes proactive quality engineering rather than traditional testing. Responsibilities include driving quality strategy, mentoring engineers, and integrating testing into CI/CD pipelines. The i ...

Senior Backend Engineer – AI Systems & APIs (Hybrid)

Harvey Nash is seeking a Senior Software Engineer in Manchester to join an accelerator programme focused on agentic AI systems. This hands-on role emphasizes building high-performance APIs and scalable backend services, ideally requiring a background in Python and/or Golang, with a preference for engineers skill ...

Senior AI Engineer Healthcare Communications & Secure Data

Niulix is seeking a Software Engineer in Greater London to deploy AI systems in healthcare, focusing on patient communication, triage, and secure data layers using Python. The ideal candidate will have over 5 years of experience building complex, production-grade systems and a proven record of turning ambiguous ...

Software Engineer – Prototyping to Production, On site

RedTech Recruitment is seeking a Software Engineer based near Saffron Walden to join an innovative start-up. You will work on diverse projects, from prototyping to full product development, and enjoy high autonomy in a collaborative environment. The role requires a strong academic background in relevant fields a ...

Software Engineer — Internal Tools & Automation

Cambridge Aerospace in Cambridge is seeking a Software Engineer (Internal Tooling) to enhance efficiency across teams. In this role, you will build and maintain internal tools, collaborating with hardware and test engineers. Key requirements include proficiency in TypeScript, Python, and SQL, along with cloud ex ...

Cloud Software Engineer Build Scalable AI Systems

Amazon is looking for a Software Development Engineer I to work in Edinburgh, UK. This role involves designing and building scalable services, contributing to innovative products, and participating in code reviews. Candidates should be enrolled in or have completed a degree in a relevant field and have experienc ...

AI Research Platform Engineer – Full‑Stack & Cloud (Hybrid)

Experis UK is seeking a Software Engineer for an AI Research Platform in Cambridge. This hands-on role involves building and maintaining backend services, developing frontend features, and managing cloud infrastructure. Ideal candidates have strong experience with Python, FastAPI, React, and cloud technologies l ...

Rust Kernel Engineer – Scalable Backend & Observability

hyperexponential is looking for a Software Engineer for the Kernel Team to design and deliver features for their AI-powered platform. The role involves enhancing a modular architecture and building automated tests for complex execution scenarios. Candidates should be experienced in backend systems development us ...

Senior Genomics AI Scientist for Diagnostics

BioTalent is seeking a Senior Computational Biologist / Computational Genomics Scientist in Oxford. The role focuses on applying computational biology, AI, and advanced software engineering to address diagnostic and public health challenges. Ideal candidates have a PhD in relevant fields, strong programming skil ...

Vehicle Systems Intern: Reverse‑Engineering & Data Tools

Geotab is seeking a Vehicle Systems Engineering Intern in High Wycombe, UK. This full-time paid internship, beginning September 2026, lasts 8–12 months. Responsibilities include reverse-engineering vehicle systems, developing software tools in C# and Python, and utilizing cloud-based data solutions like Google B ...

Secure Software Engineer for Defense Tech

SiXworks in Cheltenham is searching for a Software Engineer to work on secure digital solutions supporting Defence and National Security. The role involves designing and building applications in Kotlin Jetpack Compose, implementing backend solutions using Rust, Python, or Go, and optimizing deployment processes ...

ML Tech Lead & Strategy Architect — London

Capital One is looking for a Staff Software Engineer - Machine Learning based in Greater London. In this hybrid role, you'll own the ML/AI technical strategy for UK use cases, drive architecture for AI solutions, and collaborate with teams to enhance delivery. The ideal candidate has deep expertise in Python, ML ...

Bazel Build Systems Engineer (Greenfield, 6 Month Contract)

5V Tech is seeking an Engineer to own Bazel at scale in a hybrid role in the West of England. You will design and implement build systems, scaling operations across various languages and optimizing CI performance. This position offers a unique opportunity to define engineering practices in a cutting-edge environ ...

Staff Software Engineer – Provenance & Supply Chain

Cloudsmith is looking for a Staff Software Engineer in Belfast, Northern Ireland. In this role, you will be responsible for building the provenance ingestion service that provides enterprise customers with end-to-end traceability from source code to built artifacts. The ideal candidate will have 5+ years of back ...

Data Engineer – Fintech Platform & AI Ingestion

Kalpa Group in Greater London is looking for a Software & Data Engineer to tackle complex data issues in the fintech sector. The role involves owning ingestion pipelines, designing scalable data models, and integrating AI into the platform for improved data quality and reliability. Candidates should have strong ...

Localization Software Engineer: Validation & Metrics

AeroVect is seeking a skilled Software Engineer II to join their Localization team in Greater London. The role focuses on validating localization performance for autonomous systems, extending the regression suite, and monitoring metrics. Candidates should have over two years of experience in robotics or autonomo ...

Cloud Native QAT Automation Engineer | DevOps & CI/CD

La-Fosse-1 is seeking a highly skilled QAT Automation Engineer / DevOps Test Engineer to join a cloud-native software engineering team. The successful candidate will leverage AWS, Python, and CI/CD skills to improve automation and deployment processes within a secure government programme. The role offers hybrid ...

Data & Trading Systems Software Engineer

Two Sigma in Greater London is seeking a talented software engineer to tackle the complex challenge of discovering hidden value in data. Ideal candidates hold a Bachelors with Honours and have 1-10 years of relevant experience, including expertise in Java, Python, and C/C++. You will develop robust data pipeline ...

Principal AI Engineer: Production LLMs & RAG

Oliver Bernard is seeking a Principal AI Engineer in London to design and build LLM-powered applications. This hybrid role involves developing workflows and architectures, implementing RAG pipelines, and collaborating closely with engineers in Python. The ideal candidate has hands-on experience with LLM applicat ...

Senior AI Systems Engineer: Agentic Platforms & Scale

MA (Montreal Associates) is looking for a Senior Software Engineer in London (Hybrid) to join a cutting-edge AI startup. You will play a pivotal role in designing and scaling an AI platform, influencing architecture, and mentoring engineers. The ideal candidate has strong programming skills in Python or Golang a ...

Senior Gen AI & MAS Platform Engineer

ELLIOTT MOSS CONSULTING PTE. LTD. is hiring an experienced engineer to design and operate production-grade Agentic AI systems. The ideal candidate will have 8+ years in software engineering, strong proficiency in Python or TypeScript, and skills in Kubernetes and SQL. Responsibilities include developing multi-ag ...

Cloud Native Microservices Engineer II

JPMorgan Chase is seeking a Software Engineer II to enhance and build trusted technology products within the Global Banking Platform. The role involves developing scalable microservices using best practices and participating in a secondment with a FinTech partner. Candidates should have experience in programming ...

Real World Data Scientist: Healthcare Insights & Strategy

Roche is seeking a Real-World Data Scientist in Welwyn Garden City, UK. In this role, you will generate high-impact insights from real-world data to inform clinical and regulatory strategies. Applicants should have a PhD or Master’s degree in a relevant field and experience in observational studies. Key qualific ...

Principal AI Systems Engineer Healthcare Platforms

TechTree is looking for a Principal Software Engineer to deploy AI systems in healthcare, focusing on patient communication and secure data layers using Python. You will work directly with hospitals to build and scale enterprise-grade systems. The role requires 5+ years of experience in building complex systems ...

Founding ML Engineer: Build a Living Semantic Layer

JetBrains is looking for a top-class ML Engineer to shape the future of software development through AI and ML technologies. You will define the research agenda and own the AI engineering stack. Responsibilities include designing LLM solutions and establishing MLOps practices. The ideal candidate should have at ...

Remote AI Evaluation Engineer: Train Next Gen Agents

Outlier AI is seeking an experienced backend engineer to shape the future of autonomous agents. This role involves collaborating with leading AI organizations to train advanced language models while working remotely. Candidates should have 2+ years of experience in backend engineering, proficiency in at least tw ...

Wireless Systems Integration Engineer: 5G, RF & Debug

Keysight Technologies SAles Spain SL. is looking for a Wireless System Integration Engineer in Fleet, UK. This role involves integrating, validating, and troubleshooting advanced wireless communication systems, working extensively across software and hardware components. Ideal candidates should possess ...

Senior UI Infrastructure Engineer — Hybrid, Build Tools

Roku, Inc. in Cambridge, England, seeks a Senior Software Engineer for UI Infrastructure development. Ideal candidates will have extensive experience in C++ and Python, contributing to the robustness of embedded frameworks that impact millions of users globally. This position is integral to developing ...

AI Driven Software Engineer — London (Early Stage)

Java Script Works is seeking a Software Engineer to join their team in London. The role involves working with cutting-edge technologies, specifically in integrating AI and APIs using TypeScript and Python within a cloud-native environment. This is a full-time position, offering a competitive salary bet ...

Senior Quant Trading Engineer Java & Crypto

Quant Capital is urgently hiring for a Senior Software Engineer specializing in Quant Trading based in London, United Kingdom. The role offers a competitive salary range of £150,000-200,000, plus a bonus of £50,000-80,000. The position focuses on developing top-tier trading systems for a leading player ...

Clinical Informatics Analyst — Flexible Work & Growth Path

Medpace is expanding its Clinical Informatics team, seeking qualified individuals as Clinical Informatics Analysts to collaborate with Clinical Operations teams. Analysts will evaluate data needs, contribute to innovative data products, and support process improvement initiatives alongside a software engineer ...

Java Engineer – Hybrid Hedge Fund in London | 30% Bonus

Quant Capital is seeking a Software Engineer for a Small Hedge Fund in London. The role requires strong skills in Java and Python to support a high-profile client. The position offers a competitive compensation package of £90k plus a 30% bonus, with a requirement to be in the office three days a week. This full- ...

First AI Engineer Own the AI Platform & Impact

Halian | Managed Services, Recruitment Agency & Contract Staffing is looking for the first dedicated AI Engineer in Bracknell, UK. This pivotal role involves designing and implementing LLM-based applications, building scalable backend services with Python and Java, and collaborating with cross-functional teams. ...

DevOps Engineer for MetDB Platform

Stars Arena is seeking a full-time DevOps Engineer for the MetDB team at the Met Office in Exeter, United Kingdom. The candidate should possess technical literacy in multiple programming languages, particularly Python and C, and have experience working with Linux in an agile environment. Compensation ranges from ...

AI Training Architect — Early Stage, High Impact

bloom is seeking a Software Engineer to work at the forefront of AI in London. You'll design training curricula for AI systems and create problem sets to enhance their learning. The ideal candidate has 1+ years of Python experience and is comfortable with LLM APIs. This is not just a maintenance role; it’s hands ...

Remote Senior Full Stack Engineer Equity + AI Impact

Cogna, an ambitious early-stage startup in Greater London, seeks a Full-Stack Software Engineer. You will define and maintain backend architecture and APIs while developing frontend interfaces. With at least 8 years of experience, you'll thrive in a fast-paced environment, building scalable microservices using m ...

Junior Software Engineer (Hybrid) London, DevOps & Cloud

A forward-thinking technology company in London is seeking a Graduate / Junior Software Engineer to join their growing team. This hybrid role offers a great opportunity for someone early in their career to gain hands-on experience with scalable and secure systems. Responsibilities include automating DevOps workf ...

Hybrid Senior Full Stack Engineer — Data Platforms & AI

RSMB is seeking a Senior Full Stack Engineer in London, working hybrid (2 days in the office). This full-time role offers a competitive salary of up to £85,000 per annum. The position involves designing high-performance applications and collaborating with data science teams. Candidates should have 5–10 years of ...

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    Lead Software Developer Python Jobs in United Kingdom Job Search Guide, Trends and Insights