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MBDA UK
06 Mar, 2026
Permanent
Senior Software Engineer
MBDA UK Stevenage, UK
We're looking for a Senior Software Engineer to join our team and take our technology and your career into new territories! MBDA is a great a place to learn about the company's entire product portfolio, whilst embracing the change to DevOps and other innovative technologies! Job Title: Senior Software Engineer Salary: £40,000-£75,000 depending on experience Location: Stevenage (We may be able to offer a relocation package for this role) Dynamic (hybrid) working : Typically for this role you will work 3-5 days per week on-site due to workload classification. Security Clearance: British Citizen or a Dual UK national with British citizenship Restrictions and/or limitations relating to nationality and/or rights to work may apply. As a minimum and after offer stage, all successful candidates will need to undergo HMG Basic Personnel Security Standard checks (BPSS), which are managed by the MBDA Personnel Security Team. What we can offer you: Company bonus : Up to...
citi
06 Mar, 2026
Full Time
Senior Software Engineer - Build AI Tools (Python, GoLang)
citi London, UK
Citi, the world leading global bank, has approximately 200 million customer accounts and a presence in more than 160 countries and jurisdictions worldwide. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management. Citi enables clients to achieve their strategic financial objectives by providing them with cutting-edge ideas, best-in-class products and solutions, and unparalleled access to capital and liquidity. The Team: Cloud Technology Services (CTS) is responsible for looking after Citi’s Cloud programme across Public and Private Cloud. It has several new and exciting programmes utilising cutting edge cloud and container technologies, with a view to ensuring that our offerings are best in class and enable our wider business lines and clients alike. The job: This...
Light & Wonder
05 Mar, 2026
Full Time
Senior Software Engineer
Light & Wonder Manchester, United Kingdom
Gaming: Welcome to the world of land-based gaming. At Light & Wonder, it’s all about the games, and our Gaming team builds cutting-edge technology, products, and content for the most iconic casinos and operators across the globe. Position Summary Located in the vibrant Spinningfields district of Manchester, our studio is home to more than sixty talented content development specialists who design and build world‑class game content for both UK and international markets. We pride ourselves on creativity, collaboration, and technical excellence and we balance hard work with regular social events including team nights out, board‑game evenings, and more. About the Role As a Senior Software Engineer, you will work within a creative, multidisciplinary team alongside graphic artists and game designers to develop high‑quality video game software for the global gaming market. You’ll be responsible for producing clean, efficient, and well‑structured code while...
citi
05 Mar, 2026
Full Time
Senior Software Engineer, CalcGraphs - Vice President
citi London, UK
Team Overview XiP is building a next-generation cross-asset calculation system for Citi trading desks and enterprise users in the largest global financial markets and exchanges in New York, London, and other major financial hubs. Our team owns multiple Java Spring Boot Services that execute, partition, and track quantitative risk graphs/trades in a distributed environment. These graphs can fail due to their complexity and our system must adapt quickly to these failures to provide a seamless experience for clients.  XiP Compute Services are deployed onto OpenShift and Amazon’s Elastic Kubernetes Service (EKS). An important initiative in 2025 will be onboarding Google’s Kubernetes Engine to further expand our coverage. Our system scales on-demand, and we can run up to tens of thousands of replicas of our services across all asset classes.  Role Overview We are seeking a Senior Engineer to fill the role of ‘Applications Development Technology Lead Analyst’ on the...
citi
05 Mar, 2026
Full Time
Senior Software Engineer - Java/Kotlin (Developer Enablement) - Vice President
citi Belfast, UK
We’re looking for multiple talented engineers Server Side , to join one of our high-impact teams inside Citi’s CTO organisation . You’ll sit within Devel oper Enablement , a group focused on innovation, developer platforms and internal tools used across the bank, where we experiment and ship fast, like a startup inside a global bank. Our mission is to save our engineers tens of minutes per day, equating to £10,000,000s of savings at Citi’s scale.       Opportunities in CTO   There are many exciting opportunities for you , and flexibility to move between multiple projects if that’s something you’d enjoy.     SDLC Automation is a greenfield project that builds on the success we’ve had in automating the SDLC and takes it further . Th is blue-sky project looks at ways we can greatly improve the SDLC process at Citi, taking ideas like grad ing engineering teams and...
Client Server
04 Mar, 2026
Permanent
Senior Software Engineer TypeScript Full Stack
Client Server London, UK
Senior Software Engineer (TypeScript Full Stack) London / WFH to £100k Do you enjoy problem solving and working with a range of technologies including functional programming languages such as Elixir, using the right tool for the job? You could be progressing your career in a senior, hands-on Software Engineer role at a successful and profitable energy trading market data scale-up. What's in it for you: Competitive salary, to £100k + Significant Equity Hybrid working (3 days London office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership, working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture...
Light & Wonder
28 Feb, 2026
Full Time
Senior Software Engineer GDK
Light & Wonder Manchester, United Kingdom
Gaming: Welcome to the world of land-based gaming. At Light & Wonder, it’s all about the games, and our Gaming team builds cutting-edge technology, products, and content for the most iconic casinos and operators across the globe. Position Summary As a Senior Software Engineer, you will be a key contributor to the development of our next-generation cross-platform core game framework, used to power hundreds of games across online, mobile and desktop platforms. You will focus on creating robust, maintainable solutions whilst working collaboratively with a highly skilled team of developers. We're looking for people who are full of ideas, want to challenge the norm and work to our core values…  Dare to be Bold  - We always bring courage to work to reach for the unbelievable.  Uphold Integrity  - We promote accountability and respect to raise the bar for ourselves and the industry.  Never Settle  - We relentlessly push forward to create the extraordinary...
citi
28 Feb, 2026
Full Time
Full-Stack Senior Software Engineer, GenAI Data Products and Platform (VP)
citi London, UK
The Opportunity This is your chance to build the foundational systems for 'Citi Assist', a Generative AI assistant that will reach every Citi employee globally. You'll join us on the ground floor, becoming a core builder on a high-visibility platform that sets the standard for how a global bank adopts this technology safely and at scale. Here's what makes this role unique: we know that data is the key to building a successful, safe, and scalable generative AI assistant. The difference between a good AI product and a great one isn't just the model—it's the testing, evaluation, and feedback loops that make it better every day. As a data-focused full-stack engineer, you'll help us craft the tools and systems that let us understand how Assist is performing, where it's succeeding, and where it needs to improve. You'll work across the stack, building everything from intuitive dashboards that surface insights to robust backend pipelines that process evaluation data at scale....
Adecco
23 Feb, 2026
Contract
Senior Software Engineer
£650 - £700 daily
Adecco 39 Holloway Rd, London N7 8JP, UK
Adecco / Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job Title : Senior Software Engineer Contract : 12-Month Contract to be extended Location : Windsor Or London - Hybrid (Once a month in office) Rate : 650 - 700 inside umbrella Are you a talented software engineer with a passion for AI and cloud technologies? Do you thrive in collaborative environments where innovation is at the forefront? Our client is on the lookout for a Senior Software Engineer to join their dynamic team and help shape the future of contact centre solutions using AWS AI services! What You'll Do: As a Senior Software Engineer, you will...
Thales
17 Feb, 2026
Full Time
Senior Software Engineer
Thales Templecombe BA8, UK
Location: Templecombe, United Kingdom Thales people architect solutions that are relied upon to deliver operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defensive systems for land, sea, and air. From early warning, to threat neutralisation, our platforms cover all levels from very short-range systems, to extended protection across the entire battle-space including Airspace Mobility Solutions, Vehicles and Tactical Systems and Missile Defence, Optronics, and Radar. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security and Space. Your health and well-being matters to us and that’s why we offer you...
ATA Recruitment
04 Mar, 2026
Contract
Senior Software Engineer
£550 - £650 daily
ATA Recruitment United Kingdom
Senior Java Software Engineer (Contractor) UK-Based Fully Remote Outside IR35 Contract to Dec 2026 We are supporting a global engineering and technology organisation in the search for a Senior Java Software Engineer (Contractor) to join their Performance Engineering & Research team. This is a fully remote opportunity (UK-based candidates only) working on robust, scalable software that supports sophisticated control algorithms and performance optimisation systems. The Role You will design, build and maintain efficient, high-performance Java applications, contributing across the full software development lifecycle including: Requirements analysis and system design Development and implementation Testing and deployment CI/CD and automation improvements Technical documentation Working under the guidance of the Principal Performance Engineer, you will collaborate with solution design, integration, simulation and delivery teams globally. What We re...
Starling Bank
04 Mar, 2026
Permanent
Senior Software Engineer - Card Integrations - Visa / Mastercard
Starling Bank 39 Holloway Rd, London N7 8JP, UK
Description At Engine by Starling , we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology. Engine is Starling's software-as-a-service (SaaS) business, the technology that was built to power Starling, and two years ago we split out as a separate business. Starling has seen exceptional growth and success, and a large part of that is down to the fact that we have built our own modern technology from the ground up. This SaaS technology platform is now available to banks and financial institutions all around the world, enabling them to benefit from the innovative digital features, and efficient back-office processes that has helped achieve Starling's success. As a company, everyone is expected to roll up their sleeves to help deliver great outcomes for our clients. We are an engineering led company and we're looking for people who are will be excited by the potential for Engine's...
Starling Bank
04 Mar, 2026
Permanent
Senior Software Engineer - Java - Engine by Starling
Starling Bank 39 Holloway Rd, London N7 8JP, UK
Description At Engine by Starling , we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology. Engine is Starling's software-as-a-service (SaaS) business, the technology that was built to power Starling, and two years ago we split out as a separate business. Starling has seen exceptional growth and success, and a large part of that is down to the fact that we have built our own modern technology from the ground up. This SaaS technology platform is now available to banks and financial institutions all around the world, enabling them to benefit from the innovative digital features, and efficient back-office processes that has helped achieve Starling's success. As a company, everyone is expected to roll up their sleeves to help deliver great outcomes for our clients. We are an engineering led company and we're looking for people who are will be excited by the potential for Engine's...
Starling Bank
04 Mar, 2026
Permanent
Senior Software Engineer - Database Platform - Engine by Starling
Starling Bank 39 Holloway Rd, London N7 8JP, UK
Description At Engine by Starling , we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses on our technology. Engine is Starling's software-as-a-service (SaaS) business, and is the technology that was built to power Starling Bank. Engine split out as a separate business in early 2024. Starling Bank has seen exceptional growth and success, and a large part of that is down to the fact that we have built our own modern technology from the ground up. This SaaS technology platform is now available to banks and financial institutions all around the world, enabling them to benefit from the innovative digital features, and efficient back-office processes that has helped achieve Starling's success. Our technologists are at the very heart of Engine and enjoy working in a fast-paced environment that is all about building things, creating new stuff, and disruptive technology that keeps us on the cutting edge...
Reed Technology
23 Feb, 2026
Permanent
Senior Software Engineer
Reed Technology Nottingham, UK
Senior Backend Software Engineer - Cloud-Native Platform Up to 85,000 Hybrid (Nottinghamshire HQ) 3 days a week in their East Midlands Head Office (not negotiable) I'm delighted to be once again recruiting on behalf of my technology-led client that's building a modern, cloud-native platform from the ground up. They're looking for a Senior Backend Software Engineer to join a high-performing team focused on delivering scalable, secure, and high-quality services using the latest tools and engineering practices. This is a hands-on role for someone who enjoys solving complex problems, working in a microservices environment, and contributing to architectural decisions. The team values clean code, automation, and continuous improvement-and they're looking for someone who shares that mindset. Key responsibilities as the Senior Back-End Software Engineer are: Design and develop backend services using Node.js and TypeScript , deployed in a cloud-native environment. Build...
Thales
19 Feb, 2026
Full Time
Senior Software Engineer
Thales Glasgow, UK
Location: Glasgow, United Kingdom Thales people architect solutions that are relied upon to deliver operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defensive systems for land, sea, and air. From early warning, to threat neutralisation, our platforms cover all levels from very short-range systems, to extended protection across the entire battle-space including Airspace Mobility Solutions, Vehicles and Tactical Systems and Missile Defence, Optronics, and Radar. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security and Space. Your health and well-being matters to us and that’s why we offer you the...
Thales
14 Feb, 2026
Full Time
Senior Software Engineer
Thales Belfast, UK
Location: Belfast, United Kingdom Thales people architect solutions that are relied upon to deliver operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defensive systems for land, sea, and air. From early warning, to threat neutralisation, our platforms cover all levels from very short-range systems, to extended protection across the entire battle-space including Airspace Mobility Solutions, Vehicles and Tactical Systems and Missile Defence, Optronics, and Radar. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security and Space. Your health and well-being matters to us and that’s why we offer you the...
Curtiss-Wright
05 Mar, 2026
Permanent
Senior Software Development Engineer
Curtiss-Wright Letchworth Garden City, UK
We are looking for a Senior Software Development Engineer to join our Letchworth As our Senior Software Development Engineer, you will perform all software lifecycle phase tasks from planning to release and subsequent maintenance and support. Be able to complete all allocated tasks within the time and budget specified within the work package definitions. The successful candidate will be an experienced Software Development Engineer, and be able to make correct technical decisions that ensure compliance and quality while considering cost, schedule and risk. Location: Letchworth UK We Take Care of Our People Work-life balance through our Hybrid working, flexitime program and condensed work week (role dependent) I Paid Time Off I Retirement with Employer Match I Health and Wellness Benefits I Learning and Development Opportunities I Competitive Pay I Bonus Scheme I Recognition I Employee Stock Purchase Plan I Inclusive & Supportive Culture Your Challenge...
AD
03 Mar, 2026
Permanent
Senior Embedded and Control Software Engineer
AB Dynamics Bradford-on-Avon BA15, UK
Description As a Senior Embedded and Control Software Engineer, you will be responsible for designing, developing, and deploying code for AB Dynamics automotive test equipment, ranging from track testing solutions (driving robot and Advanced Driver Assistance Systems (ADAS) target products) to laboratory-based testing equipment (SPMM, ANVH, SSTM). You will play a critical role in ensuring the successful delivery of high-quality products that meet customer requirements and industry standards. Collaboration with cross-functional teams to ensure the seamless integration of software into our products. This role offers an exciting opportunity to work with leading automotive clients worldwide. Core Responsibilities Real Time and Embedded Software Development with a focus on real time control software. Define, design and implement software architectures and robotics control systems, ensuring high performance in real-time environments. Define and implement...
citi
28 Feb, 2026
Full Time
Senior Java Software Engineer (AVP)
citi Dublin, Ireland
Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech....
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