Senior Software Developer Jobs in London

Singer Capital Markets

London

Singer Capital Markets is a boutique investment bank in the UK Small and Mid-Cap market. We are a privately-owned company made up of c.115 professionals based near the Bank of England. You will be responsible for establishing an agile development framework tailored to our bespoke trading and data analytics needs.

Anson McCade

London

• Ending Soon

Job Description Contribute significantly to the creation of a greenfield systematic trading engine. Construct essential elements like the signal framework, portfolio construction, data layer, and back-testing library. Create and implement new, methodical user interfaces and workflows for efficient, touchless trading.

Oxford Knight

London

• Ending Soon

Award-winning, tech-savvy algorithmic trading firm in London. Specialists within electronic market-making in FX, equity, fixed income and commodity markets. Part of team that oversees the infrastructure used by the rest of the firm. Fluent programming skills in any language are a must-have.

RedTech Recruitment

London

• Ending Soon

A Software Developer is needed to join an exciting start-up in London. The company is currently in stealth mode developing exciting technology in the security space. This is a unique opportunity to join at this early stage, receiving equity in the business, while helping shape and develop the products during this innovative R&D stage.

Oxford Knight

London

• Ending Soon

Leading systematic trading firm is looking for a developer to join one of their core teams. The developer will be responsible for building and enhancing key components that directly affect their algorithmic trading and data management systems. The role is an excellent opportunity to work directly with Traders & Researchers on bespoke tooling.

The Digital Recruitment Company

London

Lead Developer – Fintech Payments. Job Type: PermanentSalary: Competitive + Equity + BenefitsLocation: London or Remote (UK-based preferred) Role: Architect secure, API-driven platforms for real-time money movement.Guide and mentor a top-tier dev team.

Hunter Bond

London

• Ending Soon

Senior C# Developer at a prestigious financial institution in London. Will work on high-impact projects within a fast-paced, cutting-edge environment. Must have strong hands-on experience with C# development in a commercial setting. Must also have experience with React / Angular (a plus)

Oxford Knight

London

• Ending Soon

Quantitative Developer specializing in low-level C++ and metaprogramming to contribute to ultra-high-frequency trading strategies. Candidate will interact with FPGA systems and work closely on optimizing and developing trading Strategies. Requires extensive expertise in memory management, threading, CPU caching, and Linux systems.

Oxford Knight

London

• Ending Soon

Senior C++ Quantitative Developer at London-based HFT firm. Must have 5+ years of C++ experience, focusing on low-level C++ and metaprogramming for high-performance applications. Must also have strong analytical and problem-solving skills, with an eye for precision.

LevelUP HCS

London

An opportunity exists for a technically oriented individual to join the Equity technology team in London. The role will focus on developing & maintaining our Equity Swaps platform – supporting front and middle office users in multiple time zones. The successful candidate will eventually be involved in projects spanning the wider equity technology...

Meritus

London

• Ending Soon

Software engineers holding active security clearance (SC, DV, eDV) Salaries up to £100,000. Experience programming in at least one of Java, Python, JavaScript, C++, C#, React. Exposure to building CI / CD solutions (Docker, Kubernetes, Jenkins Git etc)

Templeton & Partners - Innovative & Inclusive Hiring Solutions

London

• Ending Soon

C++ Software Engineers – Junior & Senior Contract Roles | London | Energy Sector. We are hiring both junior (4+ years’ experience) and senior (10+ years' experience) contractors to join a dynamic team in London. Whether you're looking to grow your expertise or take on a leadership role, this is an opportunity to contribute to innovative solutions.

Harnham

London

• Ending Soon

Lead Backend Software Developer. Lead a team of 3 engineers with development, testing, and deployment of software solutions. Salary/Rate between £80k - £100k – depending on experience.Hybrid working, 2 to 3 days per week in the London or Ipswich office. 25 days holidays.

Reply

London

Software Developer at Sprint Reply in London. You'll be instrumental in transforming and optimising our clients' business processes with the latest automation technology. The start date for this job opportunity will be Summer/Autumn 2025. You will be surrounded by peers who share your passion for technology and you'll have an opportunity to work...

Hypervision Surgical

London

Software Engineer and Senior Software Engineer level, depending on experience. You will contribute to ongoing improvements and upgrades to our surgical hyperspectral imaging system. We are building our company at the intersection of surgery, machine learning and interventional image computing to increase surgical precision and patient safety.

ZipRecruiter

London

A technology consulting firm specialising in Financial Services is looking for a Senior Java/C# Developer to support a global trading tools team for an international bank. You will work closely with fellow developers and business analysts to enhance the existing Openlink platform and expand integrations with global commodities application stack.

Gold Group Ltd

London

Senior Software Engineer at a fast-growing cybersecurity company in London. They are building the next generation of browser-based identity security. You’ll work across the stack and collaborate closely with product, design, and security teams to build features that directly protect users in real time.

Stanford Black Limited

London

Working with the Head of Trading Execution at an incredibly tech driven hedge fund. C# developers will drive the build out of a highly revenue generating, cross-asset systematic trading platform in the cloud. You will be owning the end-to-end design and development of the project.

SR2 | Socially Responsible Recruitment | Certified B Corporation™

London

• Ending Soon

Senior Fullstack Software Engineer – Tech for Good - Government - £75k. They have grown 20% in the last 12 months and are looking to continue that by making additional growth hires. By working with local authorities, they have been able support 3 million people across the UK and found an additional £1 billion of support funding.

POSTX

London

• Ending Soon

Job Description About POSTX. POSTX's vision is to change the way the world moves goods with zero carbon emissions by providing a transportation and logistics platform. The ideal candidate will have a strong foundation in software development, leadership experience/ potential, experience with modern frameworks and libraries.

Digital Waffle

Greater London

We’re partnering with an award-winning SaaS company looking to expand their team. In this role, you'll help deliver high-quality solutions within a dynamic Agile environment. We're looking for passionate Senior Software Engineers eager to build innovative solutions. If this sounds like you, we’d love to hear from you!

RedRock Resourcing

City of London

A rapidly growing financial services company in London is seeking a Senior C# Software Engineer to join their dynamic software development team. The ideal candidate will thrive in a fast-paced environment, demonstrate autonomy while collaborating effectively with team members. The successful candidate will be on-site in central London twice a week.

Skillfinder International

London

• Ending Soon

Software Engineer will work inside IR35 and hybrid in C. The role will involve taking an active part in the development of multiple components, including order placement, routing and management. The position will be on an initial 6 month (+EXT) contract position.