Software Developer Sr jobs in Luton

Lead Full Stack Software Developer | £80,000 - £100,000 We're working with a fast-growing UK SaaS technology company building data-driven digital products on this exciting opportunity. This is a high-impact, hands-on leadership role where you will shape the next generation of customer-facing platfor

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage across fo

Haystack

Senior Software Developer | £500 - £600 We're working with a global energy transformation leader with a 150-year legacy of innovation on this exciting opportunity. We are looking for a heavy-hitting Senior Developer who can bridge the gap between complex finance logic and high-performance Ruby on Ra

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage across fo

DEVELOPER JOURNEY STRATEGY AT GOLDMAN SACHS The Developer Journey Strategy focuses on investing in the developer experience to minimize friction, promote standardization, and leverage artificial intelligence (AI) to enable seamless delivery. By streamlining processes, implementing consistent practic

Job Req Id 26953948 Location(s) London, England, United Kingdom Job Type Hybrid Posted Apr. 16, 2026 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 o

eFinancialCareers

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 We'r

Citigroup

We’re looking for an expert level server side engineer, to join one our high-impact teams inside Citi’s CTO organisation. You’ll sit within Developer Enablement, a group focused on innovation, developer platforms and internal tools used across the bank, where we experiment and ship fast, like a star

Software Developer Berkshire (Hybrid: 3–4 days office-based) £65,000 – £80,000 + benefits Overview Our client, a well-established and growing technology business, is seeking capable Software Developers to join a high-performing engineering team. This role sits within a complex, enterprise-grade envi

FlexTrade Systems is a provider of customized multi-asset execution and order management trading solutions for buy- and sell-side financial institutions. Through deep client partnerships with some of the world's largest, most complex and demanding capital markets firms, we develop the flexible tools

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage across fo

ITOL Recruit

£28,000 - £35,000 /year

Are you looking to benefit from a new career in Software Development? Skills shortages in the IT sector is driving the need for qualified, entry-level career seekers and career changers. We help place graduates from this programme in top UK companies and organisations needing to employ entry-level s

LinuxRecruit

£8,333 - £10,000 /year

The giants of cybersecurity didn't just build a new company; they invented an entire market. Today, that market is worth £22 billion, and the rocket ship they built to lead it is currently docking in London! Quietly assembling an elite, newly formed engineering squad. This isn't a team that maintain

Job Summary We are seeking a highly skilled and motivated Software Engineer to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining innovative software solutions across various platforms. This role offers an excellent opportunity

Senior Software Developer in Test - Appvia - UK Security Clearance eligibility required Location: London, UK (Hybrid - ~1 day per week in office) Contract: Permanent, Full-time Package: £70,000 - 80,000 + 10% Bonus + 10% Shares + Benefits (see more below) About Appvia Appvia is a specialist cloud, p

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 We'r

Senior Software Developer / Software Engineer (C# .Net) London onsite to £150k Are you an experienced C#, backend focussed Software Developer? You could be progressing your career in a senior, hands-on role at a global Sports Trading business, earning substantial bonuses. What's in it for you: Salar

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage across fo

Graduate Software Developer About Reply: Reply specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud co