Software Engineer C Python Java Defence Tech Jobs in UK

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Software Engineer Petabyte Scale Data & Trading Systems

Engineering underpins our continued growth and success, and we are committed to recruiting and developing the world’s best Engineers. Our teams develop and build tooling for a petabyte-scale compute farm; your code will exist at the cutting-edge underpinned by near infinite compute power. Most of our systems ...

Senior Python Systems Developer Functional Testing Project

Mindrift connects specialists with project‑based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. About the Role This project is suited for a Senior Python developer with deep functional testing experience, strong Linux and Docker skil ...

Real Time Embedded Software Engineer (C++, Linux/VXWorks)

A leading aerospace and defense company is seeking experienced Software Engineers to join their Electronic Warfare team. Candidates should have expertise in C++ and real-time embedded systems. The role offers significant career development and flexibility with hybrid working options. An inclusive culture and str ...

RegTech Software Engineer: C#/.NET, Angular, Azure (Hybrid)

A leading wealth management firm in London is seeking a Mid-Level Software Engineer to enhance their regulatory reporting and application architecture. This role involves migrating reporting workflows into cloud-native environments and designing maintainable web applications. Candidates should have 4-5 years of ...

Hybrid Software Integration Engineer C# | SQL & R&D

Corriculo is seeking a Software Integration Engineer / Systems Developer to contribute to integration projects and support application users. This hybrid role based near Warrington involves strong C# development, optimizing SQL queries, and tackling diverse technical challenges. If you’re adaptable and eager to ...

Senior Software Engineer C#/.NET & Angular, AI SaaS

A leading technology firm in the United Kingdom is seeking a Senior Software Engineer to modernize and enhance a key AI product. You'll work on a dynamic agile team, delivering innovative features with a focus on cloud-native infrastructure. This role requires expertise in Python and/or C#, experience with AWS, ...

Senior Software Engineer (C++/Rust) for Hardware Systems

A leading technology recruitment firm is looking for a Senior Software Engineer in the United Kingdom to work on innovative computing projects. The ideal candidate will excel in C++ or Rust programming, with strong skills in hardware systems and GPU integration. Responsibilities include collaborating with hardwa ...

Senior SDE: CloudFront Control Plane & Global Scaling

Amazon is seeking a Senior Software Development Engineer in Greater London, UK. In this role, you will lead the development of key initiatives and work with cross-disciplinary teams to design and deliver innovative products and services. Ideal candidates have experience in building complex software systems and p ...

Senior Software Engineer

Senior Software Engineer Enfield – 3 Days in Office £60,000-£65,000 Make sure to read the full description below, and please apply immediately if you are confident you meet all the requirements.I’m currently working with a well-established global engineer ...

Graduate Trading Systems Engineer (C++/Python) – London | Yearly Ski Trip

Stars Arena is seeking a Graduate Developer for Trading Systems in London, United Kingdom. The ideal candidate should have a background in C++ and Python, showing enthusiasm for trading development. With a competitive salary of up to £50,000 plus bonus, this full-time position offers a yearly ski trip as a benef ...

Application Security Engineer: Threat Modeling & Secure Architecture

A leading global e-commerce company is seeking an experienced Application Security Engineer in Greater London. You’ll conduct application security reviews, design secure architecture, and ensure security across various services. A Bachelor's degree in Computer Science and programming experience in Java, C++, or ...

Application Engineer: Image & Signal Processing

Java Script Works is seeking an Application Engineer based in Cambridge, United Kingdom. This full-time role requires a Bachelor's degree in Computer Science or equivalent experience. Candidates should possess strong programming skills in MATLAB, Python, JavaScript, and C++, along with expertise in developing ...

Sports Tech AI Engineer Remote, Learning Fund

Flutter UK & Ireland is seeking a passionate AI Engineer to join our dynamic team in West Yorkshire. You will design, develop, test, and launch innovative solutions, mentor peers, and improve current practices. The ideal candidate has experience with LLM-based applications, programming languages like Python, C#, ...

Software Engineer

The Role :As a Software Engineer you will join the OpTech team in Intelligence Security Solutions providing cutting edge solutions to protect Sovereign states from ever changing and increasingly more sophisticated threats.Day-to-day, you will be working within a team that develops software for ...

Software Engineer

The Role :As a Software Engineer you will join the OpTech team in Intelligence Security Solutions providing cutting edge solutions to protect Sovereign states from ever changing and increasingly more sophisticated threats.Day-to-day, you will be working within a team that develops software for ...

Site Reliability Engineer: Resilience & Performance Architect

HCLTech in Greater London seeks a skilled software engineer to develop and support Python, Java, and machine learning applications. The role involves researching innovative solutions to enhance infrastructure performance and implementing frameworks for reliability and data availability. Candidates will benefit f ...

Software Engineer

Software Engineer Gloucester, Gloucestershire £43-53k p/a with BUPA, bonus and full benefits 4 Day Work Week options Lockheed Martin Rotary and Mission Systems (RMS) provides systems engineering, ...

Sr. Software Engineer Fraud & Quality Team

Sr. Software Engineer - Fraud & Quality Team Full-time Who We Are Cint is a pioneer in research technology (ResTech). Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish rese ...

Software Engineer

Hybrid work model -3 days in the office, 2 days wfh 6 months contract with possible extensions 5V Tech are working with a fast-growing deep tech company building a completely new class of AI accelerator hardware and software from first principles. They’re now looking for an engineer ...

Lead Mobile Platform Engineer (React Native)

Principal Software Engineer, Platform (Mobile, React Native) Location: 108 E 16th Street, New York, NY 10003 Required Skills Location services, online maps, compass functionality, and device tilt sensors. Experience with object-oriented design using C, C++, or Java. < ...

Software Developer (Mobile Apps) in Guildford ECM Selection (Holdings) Limited

Principal Software Engineer, Platform (Mobile, React Native) Location: 108 E 16th Street, New York, NY 10003 Required Skills Location services, online maps, compass functionality, and device tilt sensors. Experience with object-oriented design using C, C++, or Java. < ...

Software Developer (Mobile Apps) in Guildford ECM Selection (Holdings) Limited

Principal Software Engineer, Platform (Mobile, React Native) Location: 108 E 16th Street, New York, NY 10003 Required Skills Location services, online maps, compass functionality, and device tilt sensors. Experience with object-oriented design using C, C++, or Java. < ...

Lead Mobile Platform Engineer (React Native)

Principal Software Engineer, Platform (Mobile, React Native) Location: 108 E 16th Street, New York, NY 10003 Required Skills Location services, online maps, compass functionality, and device tilt sensors. Experience with object-oriented design using C, C++, or Java. < ...

Senior Software Engineer Real Time Finance, Cloud Native

A leading investment firm in the United Kingdom is seeking a Mid-Senior Level Engineer to design and build distributed cloud-native services integral to investment workflows. This role offers competitive compensation and an environment that fosters clean design and scalability. Ideal candidates will have over 8 ...

Software Engineer

Software Engineer Learn more about the general tasks related to this opportunity below, as well as required skills.Location: Abingdon, Oxfordshire (hybrid working available) Salary: £45,000 – £65,000 DOE + Excellent ...

Software Engineer (Object Oriented Programming)

Software Engineer (Object-Oriented Programming) Highly Competitive Salary + Hybrid + 25 Days Holiday + Training + Progression + Benefits Lancaster, Lancashire Are you a Software Engineer from an OOP background looking to working at the bleeding edge of satellite communication where you'll be deve ...

Automation Engineer

Location: Outskirts of Edinburgh (flexible work pattern and compressed week) Contract: 12 Month FTC Hours: 37 hours per week Overview We are working with a leading advanced manufacturing and defence organisation seeking a Senior Automation Engineer < ...

Hardware Engineer

Hardware Development Engineer Based in Farnborough, UK Must be eligible for UK Security Clearance We’re hiring an experienced Hardware Development Engineer to work on secure, mission‑critical digital systems used in govern ...

Senior Software Engineer

About the Role Software Engineer role at Made Tech. The mission is to improve public services with technology. We work with UK government, NHS, local government, and other public sector clients to deliver and manage world‑class digital products and cloud services. What the job entails </ ...

Senior Software Engineer

About the Role Software Engineer role at Made Tech. The mission is to improve public services with technology. We work with UK government, NHS, local government, and other public sector clients to deliver and manage world‑class digital products and cloud services. What the job entails </ ...

Senior Software Engineer Billing Microservices (Hybrid)

A fintech solutions provider in Belfast is seeking a Senior Software Engineer to join the Billing engineering team. The role focuses on designing and developing software solutions, including building microservices and optimizing code for billing operations. Ideal candidates will have a Bachelor's degree in Compu ...

Senior Software Engineer Billing Microservices (Hybrid)

A fintech innovation leader in Belfast is seeking a Senior Software Engineer to join their Billing engineering team. This role involves designing, developing, and maintaining high-quality software solutions, focusing on microservices for billing operations. The ideal candidate has at least 5 years of software de ...

Senior Software Engineer – Hybrid, Global Finance Impact

Citi in Belfast is seeking a Senior Software Engineer to work in a dynamic technology team focused on building software solutions for complex business challenges. You will engage in all facets of software development while collaborating closely with product teams. A bachelor's degree in computer science or engin ...

Senior Software Engineer Billing Microservices (Hybrid)

A fintech innovation leader in Belfast is seeking a Senior Software Engineer to join their Billing engineering team. This role involves designing, developing, and maintaining high-quality software solutions, focusing on microservices for billing operations. The ideal candidate has at least 5 years of software de ...

Senior Software Engineer Billing Microservices (Hybrid)

A fintech solutions provider in Belfast is seeking a Senior Software Engineer to join the Billing engineering team. The role focuses on designing and developing software solutions, including building microservices and optimizing code for billing operations. Ideal candidates will have a Bachelor's degree in Compu ...

Senior Software Engineer – Hybrid, Global Finance Impact

Citi in Belfast is seeking a Senior Software Engineer to work in a dynamic technology team focused on building software solutions for complex business challenges. You will engage in all facets of software development while collaborating closely with product teams. A bachelor's degree in computer science or engin ...

Software Engineer

Software Engineer | Bazel London Hybrid work model - 3 days in the office, 2 days wfh Up to £600/day - Outside IR35 6 months contract with possible extensions </p ...

Backend Engineer, Core Infrastructure: Scale & Reliability

A leading tech company in Greater London is looking for a Backend Engineer to build and maintain the platform foundations for their services used by over 600M users globally. You will be responsible for ensuring reliability, scalability, and providing developer tooling so that engineering teams can deliver featu ...

Full Stack Engineer — Build Trading Systems, Early Impact

A growing financial technology firm in the United Kingdom is looking for a Full-Stack Engineer to develop key components of their trading system. Ideal candidates will have a background in Computer Science or similar fields and proven coding experience in Java, Kotlin, or Python. This role offers the chance to m ...

Senior Software Engineer Real Time Finance, Cloud Native

A leading investment firm in the United Kingdom is seeking a Mid-Senior Level Engineer to design and build distributed cloud-native services integral to investment workflows. This role offers competitive compensation and an environment that fosters clean design and scalability. Ideal candidates will have over 8 ...

Senior Software Engineer

Senior Software Engineer (Backend)London - Hybrid (3 days in office)Up to £85k + benefits What if the systems you built were used every day by millions of readers around the world? A long‑established, AI‑driven technology business is hiring a Seni ...

Senior Software Engineer

Senior Software Engineer (Backend)London - Hybrid (3 days in office)Up to £85k + benefits What if the systems you built were used every day by millions of readers around the world? A long‑established, AI‑driven technology business is hiring a Seni ...

Senior Full Stack Software Engineer (C#/.NET, React)

Gearset is the leading DevOps platform for Salesforce - our users can build and manage many aspects of their Salesforce development from within Gearset, from complex CI/CD pipelines to disaster recovery. The Gearset platform is a standalone tool that sits outside of the Salesforce platform, integra ...

C++ Software Engineer | Systematic Hedge Fund | £160,000 + Bonus

C++ Software Engineer | Systematic Hedge Fund | £160,000 + Bonus QuantScope have partnered with a systematic hedge fund who are looking to add a talented C++ Software Engineer to one of their core engineering teams which is tasked with the ongoing design, development and improvement of the firm's tra ...

Graduate C++ Software Engineer: Build Next Gen Devices

A leading global technology solutions specialist in the United Kingdom is seeking recent graduates for the C++ Graduate Software Engineer position. In this role, you will be responsible for producing well-structured C++ software for advanced engineering devices. Candidates must have relevant degrees and some fam ...

Lead Software Engineer Cross Platform C++ & POS Systems

A leading software development company in Reading is looking for a Lead Software Engineer for the Client Adapter team. This role entails leading the development of cross-platform technology, providing technical mentorship, and shaping the technical roadmap. Ideal candidates will have over 5 years of C++ experien ...

ROV Software Test Engineer — C#, WinForms & Unit Testing

A technology company specializing in underwater robotics is seeking a developer to join their Edinburgh team. This role involves improving and maintaining applications for controlling ROVs, focusing on unit testing and collaboration with hardware teams. Candidates should have a degree in computer science, and st ...

Senior Software Engineer C# .Net relocate to Newcastle!

Senior Software Engineer C# .Net - relocate to Newcastle! This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server Se ...

Lead Software Engineer: C#/.NET for Trading Platform

Caxton Associates LP. is looking for an experienced Software Engineer to lead a team in London. This hands-on leadership role involves designing scalable systems, owning delivery across projects, and mentoring engineers. Candidates should have over 8 years of experience with C#, .NET, and other technologies. Str ...

Senior Software Engineer Open Source Embedded (Rust/C++)

lowRISC, based in Cambridge, is looking for software engineers to work across the full software stack, including firmware development, security tools, and cloud infrastructure. Candidates should have strong experience in C or Rust, excellent algorithmic skills, and a degree in Computer Science or equivalent. Ben ...

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    Software Engineer C Python Java Defence Tech Jobs in United Kingdom Job Search Guide, Trends and Insights