1 to 25 of 31 C# Software Engineer Jobs in London

Role Summary We are seeking a hands-on Senior Software Engineer with strong full-stack expertise across TypeScript/React, C#/.NET and modern cloud-native technologies. This role is responsible for designing, building and delivering software solutions end-to-end, owning … management. Key Responsibilities Design, build, test, deploy and support software solutions across the full technology stack. Develop scalable applications using TypeScript, React, C#/.NET and related technologies. Translate business requirements into clear, structured and testable technical specifications, applying Spec-Driven Development principles. Write secure, maintainable ...

Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first … weeks). C# Software Engineer skills required - Good analytical skills and experience of code and design review for large projects. Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. Strong Experience in developing Windows desktop applications in C# Interfacing ...

C# Software Engineer 100,000 Plus BensRemote FirstQuant Capital is urgently looking for a C# Software Engineer for our high profile investment management vendor. Our client is a well known global broker across a number of asset classes. They provide … SDLC tools and processes available to you. The current Tech stack consists of a low latency back end with components written in C++, C# and Java. There are feed handlers (BPIPE, Refinitiv RFA, FIX, WebSocket etc) to capture real-time data from external venues. The front ...

C# Software Engineer 100,000 Plus BensRemote FirstQuant Capital is urgently looking for a C# Software Engineer for our high profile investment management vendor. Our client is a well known global broker across a number of asset classes. They provide … SDLC tools and processes available to you. The current Tech stack consists of a low latency back end with components written in C++, C# and Java. There are feed handlers (BPIPE, Refinitiv RFA, FIX, WebSocket etc) to capture real-time data from external venues. The front ...

Contract Software Engineers C# & C++ (Linux) Near Wimbledon, London | 6 months | Inside IR35 Were hiring two separate contract engineers to work on hardware-integrated software projects: Contract C# Software Engineer (Windows) C#/.NET Windows desktop applications (Windows Forms …/IP, UDP Hardware/physical product interfacing On-site 3 days per week (initially full-time on-site) Contract C++ Linux Software Engineer (Embedded) Strong C++ on Linux Embedded software experience Networking (TCP/IP, UDP) Build systems (OpenEmbedded/BitBake desirable) Hybrid ...

Lead C# Software Engineer 110k + BensQuant Capital is urgently looking for a Lead C# Developer to join our high profile client.70% Development 30% Management. This is a head of development role for a team of 6 reporting to a global head of technology. … Computer Science (or other STEM major with relevant experience)Strong software analysis, design and development skillsMin 5 years professional experience in C#, Python, C++ or JavaKnowledge of relational databases and SQLExperience in or serious interest in finance and capital markets. This role suits someone from a software ...

C# Full Stack Software Engineer – Fintech85,000 Plus 10% BonusRemote Working 2 days per month in the officeQuant Capital is urgently looking for C# Full Stack Developer to join our high profile client. My Client is a well known global (yet not too corporate … will be high. There will be a need to assimilate a lot of information quickly during the in sourcing period. Day to day the C# Software Developer will be: Working on the assigned user storiesFull Stack software application developmentWriting quality code following best practicesWriting unit ...

C# Software Engineer – Quant RiskUp to 110,000 + BonusQuant Capital is urgently looking for a C# Developer to join our high profile client. Our client is a well-known leading provider of integrated risk, analytics and trading solutions for the global financial markets. … Computer Science (or other STEM major with relevant experience)Strong software analysis, design and development skillsMin 2 years professional experience in C#, Python, C++ or JavaKnowledge of relational databases and SQLExperience in or serious interest in finance and capital markets. This role suits someone from a software ...

Software Engineer 6 Month Contract Initially London - 3 days a week onsite £800 - £850 per day - Umbrella A leading Asset Management Firm is searching for a Software Engineer to join them on an interim basis. You will work in the teamresponsible … standards, security, performance, and operational stability. Mentor engineers and support technical decision-making across teams. Manage technical debt, platform upgrades, and vulnerability remediation. Technologies C#/.NET, Microsoft Azure Snowflake Data engineering and integration platforms CI/CD and DevOps Infrastructure as Code Automated testing Agile delivery Desirable Python ...

C# Full Stack Software Engineer – Fintech85,000 Plus 10% BonusRemote Working 2 days per month in the officeQuant Capital is urgently looking for a Junior C# Full Stack Developer to join our high profile client. My Client is a well known global … will be high. There will be a need to assimilate a lot of information quickly during the in sourcing period. Day to day the C# Software Developer will be: Working on the assigned user storiesFull Stack software application developmentWriting quality code following best practicesWriting unit ...

seeking a talented C# Software Engineer with Functional Skills or an etrading/commodities platform for a bank. This role is a Front Office Trading role and prior experience in this environment is a MUST HAVE. 3 days per week in Central London. 6 month … rolling contract. £720-775 per day INSIDE IR35. Key Skills C# .Net Azure eTrading Commodities (ideally Ags, Softs) some Functional Analyis know how We believe in equal opportunity for all and actively encourage applications from diverse backgrounds, experiences, and perspectives. #J-18808-Ljbffr ...

Contract Software Engineers C# & C++ (Linux) Near Wimbledon, London 6 months Inside IR35 Were hiring two separate contract engineers to work on hardware-integrated software projects: Contract C# Software Engineer (Windows) C#/.NET Windows desktop applications (Windows Forms ...

C# or C++ Software Engineer Up to 80,000Quant Capital is urgently looking for a C# C++Developer to join our high profile client. Our client is a well-known leading provider of integrated risk, analytics and trading solutions for the global financial markets. Their … Computer Science (or other STEM major with relevant experience)Strong software analysis, design and development skillsMin 2 years professional experience in C#, Python, C++ or JavaKnowledge of relational databases and SQLExperience in or serious interest in finance and capital markets. This role suits someone from a software ...

Tech: C#, SQL, MVC, WPF, .net coreChallenge: Greenfield Insurance platform, API development, industry specific challengesFirm: Well-known Insurance Trading Platform Vendor, City of London, 30 man flat global Dev TeamPay: 80k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Software Engineer Quant … Capital is urgently looking for a C# Developer to work for our high profile Lloyds of London insurer. This is an opportunity for an individual with a strong software development background. The applicant will be responsible for design, development and maintenance of my clients main pricing analytical ...

Tech: C#, Multithreading, Grindgain, Linq, SQL, Winforms Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known Fintech Trading Platform Vendor, City of London, 30 man flat global Dev Team Pay: 80k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Software Engineer – MultithreadingQuant Capital is urgently looking for a C# Developer to work for our high profile investment management vendor. Our client is a well known global wealth management HFT software business. They provide valuations and pricing of derivatives to most of the buy side. This ...

looking for a Senior Software Engineer to join our global team to be responsible for the quality, development, and execution of our software products. You will be part of a technology department that is comprised of a successful and multidisciplinary group of professionals located … related field 8+ years of experience in software development, with a focus on building scalable and reliable systems Extensive knowledge of DotNet C#, LINQ, MS SQL, Entity Framework and related technologies Capable to use version control software such as GIT Knowledge of SOLID principles Knowledge ...

building the first global data-driven last-mile network that has the potential to solve industry-wide problems. We're hiring a Senior Software Engineer who treats software as a craft, not a checklist. You'll join a small, high-trust team where ownership … Work outside strict role boundaries when needed, without feeding burnout culture Communicate technical decisions clearly and push back constructively when required Core technical skills C#/.NET 8+ , Entity Framework Core, async/await, MediatR/CQRS Strong understanding of distributed systems : consistency models, event-driven patterns, idempotency, race ...

## Principal Software Engineer - C#Applylocations: Londontime type: Full timeposted on: Posted Todayjob requisition id: R5616The TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution … hour, multi-region trading operations (follow-the-sun handover, timezone-aware processing across London/New York/Singapore)Technical:* Expert-level C#/.NET (LTS): back-end services with ASP.NET Core.* Experience designing and delivering event-driven, service-oriented back-end systems (message brokers, async workflows, API design ...

working with a highly successful buy-side investment manager that's investing heavily in software engineering, data platforms and AI as part of a firm-wide technology transformation. They're looking for a Senior Software Engineer to join a small, high-performing team where … while exploring agentic workflows across the organisation. What You'll Be Working On Designing and building full-stack applications and internal business platforms using C#/.NET Developing APIs, integrations and cloud-native solutions across Azure Building and maintaining Azure SQL and ETL/ELT data pipelines Modernising reporting ...

Digital is seeking a Software Engineer to join its London-based, on-site team. You will design, build, and maintain C#/.NET production code and SQL Server-driven components, with core logic living in the database. Expect close collaboration with the Founder ...

Role Purpose We are seeking a highly experienced Principal Software Engineer to provide technical leadership across our technology function, driving the design, delivery, and continuous improvement of enterprise applications and digital services. This is a senior hands-on role for an individual who combines deep technical … design and architecture of scalable, secure, and resilient enterprise applications, ensuring alignment with business and technology strategies. Drive Technical Leadership – Define and champion software engineering standards, architectural patterns, best practices, and reusable frameworks across the engineering community. Own Delivery Outcomes – Lead complex technology initiatives from concept through ...

Source Technology Limited is seeking a Software Engineer for a six-month contract in London. The role is 3 days per week onsite, with a daily rate of £800–£850 (umbrella). You will design scalable applications and data solutions across client onboarding to reporting, delivering ...

stay aligned, so when in doubt, bring people in. Key Responsibilities You’ll take ownership of features across Inventory Lab’s C# and Java-based systems, delivering them from initial design through to production. You’ll design and build clean, scalable services, APIs, and components that are maintainable, well … improvements that deliver meaningful value to Inventory Lab customers. About You 5–8+ years of professional software engineering experience Strong proficiency in C# and Java Experience building and maintaining backend services, APIs, and scalable application components Solid understanding of REST APIs, system design, and scalable application patterns ...

Role Overview ICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands‐on delivery of a desktop platform automating and streamlining trading desk workflows. This is a high‐visibility player‐coach role that may evolve to include formal people management. Role Responsibilities … hour, multi‐region trading operations (follow‐the‐sun handover, timezone‐aware processing across London/New York/Singapore). Expert‐level C#/.NET (LTS): back‐end services with ASP.NET Core. Experience designing and delivering event‐driven, service‐oriented back‐end systems (message brokers, async workflows, API design ...

goal is to drive efficiency, speed up transactions, reduce risk, and improve the end-customer experience. Our platform is built on a proven C# and .NET foundation, and we’re building what comes next on top of it. That means new frontier AI capabilities in TypeScript, sitting alongside … C# estate we’re actively evolving for the next era. The interesting challenge isn’t just being productive in both stacks, it’s knowing when each is the right tool and keeping the whole system coherent as our product grows. If you are passionate about how software ...