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Senior Python Software Engineer – ML & Systems Lead

Roc Search in the United Kingdom is seeking a Senior Software Engineer who is passionate about purposeful work. You will lead high-quality software development centered on Python, with C/C++ being a strong advantage. Responsibilities include managing software solutions, collaborating with data science teams to d ...

Senior Software Engineer: Distributed Systems for Science

Humand Talent is seeking a Software Engineer to join a world-class engineering team in England. You will design and develop high-performance software primarily in Python, collaborating with scientists and engineers to tackle complex technical challenges. Candidates should have strong fundamentals in software eng ...

Senior Software Engineer | IoT, CI/CD & Microservices

Domino Digital Printing Solutions - India is seeking a talented Software Engineer to join their team in the United Kingdom. The role entails designing, developing, and maintaining reliable software systems, collaborating with engineers and product managers. Candidates should have strong experience with languages ...

Senior Embedded Software Engineer—Linux, Rust & Networking

Technical Futures Ltd in the UK is seeking a Senior Embedded Software Engineer to design and develop embedded software for Digital RF products. The role requires strong C programming skills, experience with Embedded Linux, and a Bachelor's Degree in a relevant field. The position offers a competitive salary with ...

Senior C++ Software Engineer Hybrid, Impact & Growth

Reed Technology is seeking a Senior C++ Software Developer for a hybrid role based in Wellington, Cribbs Causeway, or Milton Keynes. You will be responsible for developing core customer-facing applications and leading development initiatives within an innovative team. The ideal candidate possesses exte ...

Senior Software Engineer Education Data Platform (Hybrid)

The National Institute of Teaching (NIoT) is looking for a Senior Software Engineer responsible for building and maintaining technical infrastructure for the Teacher Education Dataset (TED). You will work on secure, reliable systems that enhance teacher development. This role offers hybrid working and ...

Senior Software Engineer Hybrid, AI Driven Fintech

A financial technology company in the United Kingdom is seeking a Senior Software Engineer to design, develop, and maintain high-quality software solutions. The role involves collaborating with cross-functional teams, engaging in automated testing, and contributing to product releases. Candidates should have a B ...

Principal AI Software Engineer, Senior Vice President

## Principal AI Software Engineer, Senior Vice PresidentApplyremote type: Hybridlocations: London United Kingdomtime type: Full timeposted on: Posted Todaytime left to apply: End Date: May 25, 2026 (13 days left to apply)job requisition id: 26960138Are you looking for a career move that will put you ...

Senior Software Engineer – Property Based Testing (London)

Antithesis Operations LLC is seeking a developer based in London to help build ‘Hegel’, an innovative set of property-based testing libraries. The role requires experience with property-based testing and familiarity with Python and Rust. This in-office position values collaboration and high engineering standards ...

Principle and Senior Backend Software Engineer (.NET)

Principle and Senior Backend Software Engineer (.NET)Location: North London/HertfordshireType: Permanent | Strong Salary + Bonus + EquityRight to Work: UK work eligibility required (no sponsorship)What We’re Looking ForWe’re searchi ...

Senior Software Engineer – Property Based Testing (London)

Open Source Pledge is seeking a developer for its London team to build Hegel, a new family of property-based testing libraries. You will work on open-source initiatives requiring proficiency in property-based testing and familiarity with languages like Python and Rust. The role emphasizes collaboration and high ...

Contract Senior Software Engineer (Java or Python)

Contract Senior Software Engineer (Java or Python) | Inside IR35Contract length: 6 months (with potential to extend)Location: LondonWorking Environment: On-siteYou will be joining a private equity firm as a senior software engineer, to work across the following responsibilities:Develo ...

Senior Software Engineer in Gosport STS Defence

Senior Software EngineerGosport, United KingdomPosted 10 months agoTech stack:LinuxComputer ScienceSoftware EngineeringWeb DevelopmentJavaHTML5CSSJavaScript</l ...

Senior ADAS Embedded Software Engineer Classic AUTOSAR

REQ ID: 131720JOB TITLE: Senior ADAS Embedded Software Engineer - Classic AUTOSARSALARY: £60,000 - £75,000POSTING START DATE: 18/05/2026POSTING END DATE: 01/06/2026LOCATION: Gaydon, Warwick, UKProduct Engineering at JLR is centred on innovation and creativity. From adv ...

Senior Embedded Software Engineer Flexible Hours & Impact

A leading technology consultancy in the United Kingdom is seeking mid-level to experienced Embedded Software Engineers to join their dynamic team. The role involves developing high-performance software systems, collaborating with cross-functional teams, and mentoring junior engineers. Ideal candidates will posse ...

Senior Embedded Software Engineer in Eastleigh Staffline

Senior Embedded Software EngineerLocation: Eastleigh, United KingdomPosted 9 months agoTech StackPythonSQLiteCJavaScriptNode.jsResponsibilities & Qualifications< ...

Senior Security Software Research Engineer – Defense Tech

A leading technology firm in London is seeking a Senior Security Software Research Engineer to identify vulnerabilities and develop exploits. The role requires 3+ years of experience in vulnerability research, knowledge of various systems, and familiarity with common security research tools. Employees enjoy attr ...

Senior Software Engineer – Property Based Testing (London)

Open Source Pledge is seeking a developer for its London team to build Hegel, a new family of property-based testing libraries. You will work on open-source initiatives requiring proficiency in property-based testing and familiarity with languages like Python and Rust. The role emphasizes collaboration and high ...

Principle and Senior Backend Software Engineer (.NET)

Principle and Senior Backend Software Engineer (.NET)Location: North London/HertfordshireType: Permanent | Strong Salary + Bonus + EquityRight to Work: UK work eligibility required (no sponsorship)What We’re Looking ForWe’re searchi ...

Principal AI Software Engineer, Senior Vice President

## Principal AI Software Engineer, Senior Vice PresidentApplyremote type: Hybridlocations: London United Kingdomtime type: Full timeposted on: Posted Todaytime left to apply: End Date: May 25, 2026 (13 days left to apply)job requisition id: 26960138Are you looking for a career move that will put you ...

Senior Software Engineer – Property Based Testing (London)

Antithesis Operations LLC is seeking a developer based in London to help build ‘Hegel’, an innovative set of property-based testing libraries. The role requires experience with property-based testing and familiarity with Python and Rust. This in-office position values collaboration and high engineering standards ...

Senior Software Engineer – Shape Mission Critical Systems

A leading defense technology firm in Greater London seeks a Senior Software Engineer to develop and maintain critical software solutions. You will work on diverse projects, influencing architectural decisions and engaging in hands-on coding. The ideal candidate will have experience in backend and frontend develo ...

Senior Software Engineer Public APIs & Expense Platform

A global technology firm in Greater London is seeking a Senior Software Engineer to enhance their Business Expense Management team. You'll design and maintain scalable services while producing public-facing APIs. Ideal candidates will be proficient in Java, familiar with microservices, and possess strong communi ...

Senior Software Engineer London, England, United Kingdom

This London‑based role sits at the core of Verifone’s payments and checkout platform, where backend engineering directly impacts secure, high‑volume transactions used globally. You’ll design and operate scalable, production‑critical systems that must perform reliably under real‑world load, evolving payment ...

Senior Software Engineer Enterprise Products Data Acquisition

Senior Software Engineer - Enterprise Products Data Acquisition Location London Business Area Engineering and CTO Ref # Description & Requirements The Enterprise Product Platform (EPP) builds the technology foundation that unifies workflows, dat ...

Senior Software Engineer, Enterprise & App Team Innovate

A leading technology company in Edinburgh is seeking a Senior Software Engineer to join its Enterprise + App team. You will be responsible for guiding architectural decisions, mentoring fellow engineers, and driving product development from ideation to maintenance. The ideal candidate will have extensive experie ...

Senior Software Engineer Remote Supplier Data Platform

A leading product experience company in Greater London is seeking an experienced full-stack engineer to drive product development and enhance supplier relationships. The role focuses on building solutions using technologies like Python and TypeScript, emphasizing user needs and collaboration with customers. The ...

Senior Software Engineer, Endpoint DLP – Go & Kernel

A leading cybersecurity firm located in London is seeking a Senior Software Engineer for the FortiDLP project. This role involves enhancing the endpoint agent capabilities while maintaining high code quality standards. Candidates should have robust programming skills, experience in systems analytics, and a colla ...

Senior Robotics Software Engineer — Motion Planning Remote

A robotics software company in the UK is seeking an experienced robotics software engineer to develop algorithms and support clients in implementing advanced robotic systems. Applicants should have over 5 years of experience with coding, particularly in Java, and must be proficient in working with industrial rob ...

Senior Software Engineer Global Reliability & AI Systems

A leading global payments technology company seeks a Senior Software Engineer for a hybrid role to develop advanced software solutions. You will work in a multi-functional engineering team to tackle challenges in digital payment services, aiming for high reliability and performance. The ideal candidate has a str ...

Senior Software Engineer Age of Empires (Remote)

Forgotten Empires is a full‑service game developer focused on Windows PC and Console games. While headquartered in the U.S., our team consists of 100+ passionate individuals from around the globe, each of whom brings a unique skill set and perspective to the table. Since 2022, we are part of Keywords Studi ...

Senior Software Engineer Build Secure, Impactful Systems

A UK intelligence agency is seeking a Senior Software Engineer to solve critical challenges in safeguarding the UK. You will design and build software solutions while mentoring a team and collaborating with various stakeholders. Along with a competitive salary including bonuses, the role offers a supportive cult ...

Senior Software Engineer Build Secure, Impactful Systems

An intelligence agency is seeking a Senior Software Engineer to contribute to mission-critical software solutions. This role offers a salary between £50,354 and £60,036, with potential bonuses and benefits including 25 days of leave and opportunities for professional development. The ideal candidate will thrive ...

Senior Software Engineer Build Secure, Impactful Systems

A UK government intelligence agency is hiring a Senior Software Engineer in Manchester. The position involves key responsibilities such as software development and collaborating with teams to devise solutions for security challenges. Ideal candidates should have strong software engineering experience and a passi ...

Senior Software Engineer Platform Architect & Team Lead

A forward-thinking law firm in London is seeking a Senior Software Engineer to lead its engineering team. You will be responsible for designing the platform architecture, managing infrastructure, and ensuring security practices are robust. The ideal candidate has over 5 years of backend software experience with ...

Senior Software Engineer: Cloud‑Native & Event‑Driven

A leading investment management firm based in Greater London is seeking a Senior Software Engineer to design and build resilient systems. The ideal candidate will have 5+ years of experience in software development, particularly with cloud-distributed and event-driven architectures using C#/.NET. A background in ...

Hybrid Senior Software Engineer Python/Django, Cloud

A leading sustainability-focused organization in Birmingham is seeking a Senior Software Engineer to develop scalable software solutions and lead a delivery team. The ideal candidate will have strong expertise in Python and JavaScript, with experience in cloud environments like AWS or Azure. Responsibilities inc ...

Senior Software Engineer Infra & Platform, AWS Scale

A technology company focusing on media processing seeks a Senior Software Engineer in London. You'll engage in full-stack development, emphasizing infrastructure to scale systems for leading news organizations. This hybrid role allows you to impact critical engineering decisions and work with AWS, MongoDB, and m ...

Senior Software Engineer, Unified Platform (Reference Data)

DRW is a technology-driven, diversified principal trading firm. We trade our own capital at our own risk, across a broad range of asset classes, instruments and strategies, in financial markets around the world. As the markets have evolved over the past 30 years, so has DRW – maximizing opportuniti ...

Senior Software Engineer Biotech Instrumentation (On site)

A pioneering biotechnology firm in Cambridge is seeking a Senior Software Engineer to lead the development of the Amperia analytical tool. The role requires strong full-stack capabilities, collaboration with lab scientists, and expertise in Python, C++, and JavaScript. You will contribute to product direction an ...

Senior Software Engineer Build Secure, Impactful Systems

A UK intelligence agency seeks a Senior Software Engineer to solve mission-critical challenges using innovative software engineering techniques. You will design new systems, mentor teams, and communicate effectively with stakeholders, all while contributing to the safety of the UK. The role offers a competitive ...

Senior Software Engineer — FinTech Payments & Banking Integrations

A leading fintech company in Greater London is looking for a Software Engineer to drive the development of payment technologies. In this role, you'll integrate new bank APIs and work on a variety of challenges in crypto and fintech. Ideal candidates should have a strong knowledge of Java and enterprise software, ...

Senior Software Engineer, Data Snapshot (CASS) London

A global financial services company in London is seeking a Senior Software Engineer to develop high-performance, scalable applications for their data team. The role involves leveraging object-oriented programming skills and collaborating on various phases of the software development lifecycle. Ideal candidates w ...

Senior Staff Software Engineer — Agentic AI Architecture

A leading data integration company in Manchester seeks a Senior Staff Software Engineer to drive architecture and build tools for agentic AI systems. You will mentor engineers and develop scalable software in a collaborative environment. Ideal candidates have deep Java expertise, experience with agentic AI, and ...

Senior Software Engineer — Cloud Microservices for Energy

A leading company in the energy sector is seeking a Software Engineer to join their innovative team in Oxford. The role involves developing cloud-based software solutions that impact global energy markets. You will work with cutting-edge technologies and contribute to a microservices architecture. The ideal cand ...

Senior Software Engineer DV Cleared | Hybrid & Cloud

A leading defense tech firm in Cheltenham is seeking a Senior Software Engineer with enhanced DV Clearance for a hybrid role. You will tackle national security challenges using cutting-edge technology, contributing to hands-on development and code reviews. Strong expertise in cloud architecture, DevOps tools, an ...

Senior Software Development Engineer in Test (SDET)

Senior Software Development Engineer in Test (SDET) UK - London Senior Software Development Engineer in Test (SDET) Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Advance your testing career while shaping digital finance with a ...

Senior Software Engineer Real Time Data Pipelines

A premier betting solutions provider is seeking a Senior Software Engineer to join their Data Acquisition team in Harrow, UK. This role involves developing software for real-time sports data products and collaborating with engineers and data specialists. Candidates should have strong programming skills, experien ...

Senior Software Engineer – Hybrid, Mission‑Critical Systems

A leading UK intelligence agency is seeking a Senior Software Engineer in Manchester to tackle mission-critical challenges. This position involves contributing to the design and architecture of systems, leading teams, and delivering high-quality software solutions. You will benefit from a salary range of £50,354 ...

Senior Software Engineer Electronic Trading Shared Services

Overview We are part of the engineering organization that powers Bloomberg’s global Electronic Trading platforms across Fixed Income, Foreign Exchange, Equities, and Derivatives. Our systems process millions of trades daily, providing clients with real-time insights, regulatory transparency, and p ...

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    Senior Software Engineer Pythonjava Jobs in United Kingdom Job Search Guide, Trends and Insights