21 of 21 Permanent Senior Software Developer Jobs in London

Senior Ruby on Rails Engineer, London, £90,000 - £105,000 + Bonus We’re working with a growing SaaS company solving one of ecommerce’s biggest barriers—buyer trust. Their platform quietly supports hundreds of thousands of retailers and millions of online purchases every month. Growing organically year … year at an impressive rate, they’ve built a loyal customer base in well over 100 countries by focusing on product quality, speed, and developer-led innovation. The Senior Software Developer (Full‐stack) will work across Ruby on Rails, JavaScript, SQL, and AWS to deliver high ...

Senior Ruby on Rails Engineer, London, £90,000 - £105,000 + Bonus We’re working with a growing SaaS company solving one of ecommerce’s biggest barriers—buyer trust. Their platform quietly supports hundreds of thousands of retailers and millions of online purchases every month. Growing organically year … year at an impressive rate, they’ve built a loyal customer base in well over 100 countries by focusing on product quality, speed, and developer-led innovation. The Senior Software Developer (Full‐stack) will work across Ruby on Rails, JavaScript, SQL, and AWS to deliver high ...

product, customer success, marketing, and sales, we're gearing up for hyper‐growth. We're looking for two down‐to‐earth professional, a conscientious Senior Software Developer, to build on what already works and unlock our next wave of innovation. Your Impact Raise the bar sensibly. Whether … refining our Azure architecture as CTO or shipping revenue‐critical features as Senior Dev, you'll set high standards without reinventing the wheel. Champion intuitive user experiences. Both roles care deeply about usability, ensuring our platform feels effortless for travel pros and their travellers. Own the craft. Understand ...

Senior Software Developers specialising in trading systems required for an excellent client based in London. The successful Software Developer will join a extremely talented development team and you will be exposed to creating and maintaining our client's own applications based around a C#/.NET … opportunity to work with the some of the latest technologies possible and will be expected to produce excellent code for our clients in house software applications and trading platform.Our client offers a very collaborative working environment with all of the development team coming from excellent educational backgrounds from across ...

Senior Software Developers specialising in trading systems required for an excellent client based in London. The successful Software Developer will join a extremely talented development team and you will be exposed to creating and maintaining our client's own applications based around a C#/.NET … opportunity to work with the some of the latest technologies possible and will be expected to produce excellent code for our clients in house software applications and trading platform. Our client offers a very collaborative working environment with all of the development team coming from excellent educational backgrounds from ...

Senior Software Developers specialising in trading systems required for an excellent client based in London. The successful Software Developer will join a extremely talented development team and you will be exposed to creating and maintaining our client's own applications based around a C#/.NET … opportunity to work with the some of the latest technologies possible and will be expected to produce excellent code for our clients in house software applications and trading platform. Our client offers a very collaborative working environment with all of the development team coming from excellent educational backgrounds from ...

Senior Developer - £100k - London - Python - C# We are working with a financial services company based in London who is looking for a Senior Developer to join their growing team. This company focuses on using modern technology to solve financial issues and implement cutting edge trading strategies. ...

Senior Developer - £100k - London - Python - C# We are working with a financial services company based in London who is looking for a Senior Developer to join their growing team. This company focuses on using modern technology to solve financial issues and implement cutting edge trading strategies. ...

Senior Software Developer – Node.js/AWS/React – London (Hybrid, 3 days onsite) Are you the kind of engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance to join a small, but ambitious tech ...

London Hybrid 1-2 days a week in the office eligibility to work in the UK Role Overview We are seeking a highly skilled Senior Software Developer to lead the design and development of high quality, cloud native software solutions that drive real product and business … shape the future of our engineering landscape. As a technical leader, youll play a key role in guiding the team through the full software development lifecycle. You will actively contribute to and often lead collaborative engineering activities including pair programming, code reviews, troubleshooting, and issue resolution. A strong commitment ...

London Hybrid 1-2 days a week in the office eligibility to work in the UK Role Overview We are seeking a highly skilled Senior Software Developer to lead the design and development of high quality, cloud native software solutions that drive real product and business ...

London Hybrid 1-2 days a week in the office eligibility to work in the UK Role Overview We are looking for 2 experienced Senior Developers, preferably people who are experienced with Back End development, to join a team of eight mid-senior level developers on a greenfield … Growth Mindset have an understanding of CI/CD be competent coding using Test Driven Development & BDD patterns have a solid understanding of software development principles proactive and a results orientated individual enjoy pair programming and collaborating with other engineers have a strong willingness to learn ...

Back-end Integration Developer - .Net/Azure (Event-Based Integration) London - Adhoc - mostly remote Salary up to £70k We are seeking a talented C#/.NET/Azure Back-end Developer with expertise in event-based integration using the Azure tech stack and C#/.NET. You will … innovative integration platform that supports growth through M&A. How to Apply : If you are an experienced C#/.NET/Azure Integration Developer with a passion for event-based integration and a strong Azure background, we want to hear from you! Please send your CV detailing your relevant ...

Role Outline Do you want to help build the future of humanoid robots? We are looking for skilled Senior Full Stack Software Developers to join our software development team. You will work closely with cross-functional teams to develop, maintain, and enhance both our cloud based … apps (including front-end and back-end components), as well as local software functionality executing on-robot. In this role, you will leverage your expertise to build scalable and user-friendly solutions that align with business goals. Creativity, problem-solving, and a passion for delivering high-quality code ...

Role Outline Do you want to help build the future of humanoid robots? We are looking for skilled Senior Full Stack Software Developers to join our software development team. You will work closely with cross-functional teams to develop, maintain, and enhance both our cloud based … apps (including front-end and back-end components), as well as local software functionality executing on-robot. In this role, you will leverage your expertise to build scalable and user-friendly solutions that align with business goals. Creativity, problem-solving, and a passion for delivering high-quality code ...

Client: FinTech Firm Salary: Up to £120,000 (Pro Rata) - 6 months Location: Hybrid (London) Experience: Senior Work with cutting-edge tech, lead greenfield initiatives, zero bureaucracy, collaborative culture and stunning office space! Our rapidly scaling FinTech Client is seeking a highly skilled Java Developer to become part ...

Position Summary BGC Tech Markets is seeking a highly skilled software development professional to join the Trading Systems development team. This individual will lead the design and implementation of trading gateways and interfaces to BGC's proprietary matching engine and contribute directly to the development of the matching engine … itself. The role demands strong expertise in C++ Development within a high-frequency trading (HFT) environment. Key Responsibilities Serve as lead developer responsible for system design and implementation Develop low-latency trading gateways and market data interfaces Enhance and maintain BGC’s proprietary matching engine infrastructure Collaborate with cross ...

Position Summary BGC Tech Markets is seeking a highly skilled software development professional to join the Trading Systems development team. This individual will lead the design and implementation of trading gateways and interfaces to BGC's proprietary matching engine and contribute directly to the development of the matching engine … itself. The role demands strong expertise in C++ Development within a high-frequency trading (HFT) environment. Key Responsibilities Serve as lead developer responsible for system design and implementation Develop low-latency trading gateways and market data interfaces Enhance and maintain BGC’s proprietary matching engine infrastructure Collaborate with cross ...

London Hybrid 1-2 days a week in the office eligibility to work in the UK Role Overview We are looking for 2 experienced Senior Developers, preferably people who are experienced with Back End development, to join a team of eight mid-senior level developers on a greenfield ...

C# skilled Software Engineer/Quant Developer, you'll work closely with portfolio managers, researchers, and data scientists to build and maintain the systems that drive our alpha-generating strategies. You’ll contribute to every part of the investment pipeline—from research tooling and data infrastructure to real … Ensure robustness and scalability in both real-time and batch environments What We’re Looking For: Strong programming experience with C# Solid understanding of software engineering principles, design patterns, and performance tuning Experience in financial markets (equities, futures, FX, etc.) is a plus, but not required Familiarity with data ...

C# skilled Software Engineer/Quant Developer, you'll work closely with portfolio managers, researchers, and data scientists to build and maintain the systems that drive our alpha-generating strategies. You’ll contribute to every part of the investment pipeline—from research tooling and data infrastructure to real … Ensure robustness and scalability in both real-time and batch environments What We’re Looking For: Strong programming experience with C# Solid understanding of software engineering principles, design patterns, and performance tuning Experience in financial markets (equities, futures, FX, etc.) is a plus, but not required Familiarity with data ...