25 of 25 C# Developer Jobs in London

Senior C# Developer/Engineer (C# .Net Core) London/WFH to £85k Are you a skilled C# Developer looking to progress your career in a senior, hands-on role? You could be at a successful and scaling Retail FX Brokerage working … Greenfield systems. As a Senior C# Developer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development within ...

C# Developer/Backend Software Engineer C# .Net AWS (Junior - Mid) London to £80k Are you a bright, ambitious C# Developer who enjoys collaborating and working on complex systems with cutting edge technology? You could be progressing your career at a highly profitable … that invests in sports betting markets whilst enjoying a range of perks and benefits including hybrid working and a sociable team environment. As a C# Developer you'll join a cross functional Agile product team responsible for high-value business critical betting execution systems. ...

Looking to excel your career in a start-up environment? C# Developer – VC-backed Cloud Security Salary up to £120k + equity London 5 days in office Visa sponsorship available We have recently partnered with a rapidly growing VC-backed startup who develop technology to identify … built for rapid deployment and ease of use, enabling organisations to handle threats far more effectively. They are now on the hunt for a C# Developer to work on the system that platform processes billions of events every week, powered by modern cloud infrastructure and innovative methods. ...

C# Developer | Remote | Outside IR35 A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within … collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. Responsibilities: Produce well-structured and clearly documented C#/.NET code. Configure, customise, and maintain Microsoft Dynamics 365. Build and support integrations across Dynamics 365 and other systems. Develop plugins, workflows ...

Senior Backend Developer (C#/.Net) | Brand New Trading Payments Desk | £130,000 + Bonus + Benefits | London Hybrid I am looking for a Senior Backend Engineer with a .Net (C#) focus for a Trading House that build cross asset trading systems. The FinTech are building … + bonus + benefits Located in London City, St Paul's, with 3 days per week from the office .Net, C#, .Net Core Responsibilities of the Senior Backend Developer: Designing, coding, and testing all components of modern web applications. Contribute to the overall architecture and design ...

Title: C# Developer Rate: Up to £750/day Location: London (Hybrid) The Opportunity: I am working with a leading global investment bank seeking a C# Developer to join their high-performing FO Trading team. This is an exceptional opportunity to work alongside experienced … technologists and investment professionals building mission-critical systems that drive trading, research, and risk management operations. What You Bring (Required): Deep commercial experience engineering C#/.NET solutions within mission-critical financial services platforms Hands-on delivery of enterprise risk platforms (Market, Credit, Counterparty Risk, XVA) with solid understanding ...

C# .Net Developer - 3 months+ - Hybrid - Rate circa £500-£650 We are looking for an experienced C# .Net Developer with experience of GenAI to join a team developing cutting edge AI solutions who will either have current and active SC clearance or have … experts. You will work on projects developing GenAI capabilities and provide guidance to non-technical people. What you will bring to the team Solid C# .Net experience Fine-tune Large Language Models (LLMs) and other generative architectures. Optimise pre-trained models (OpenAI, Anthropic, or open-source LLMs) for business ...

Senior Full Stack Developer | C# & React | Greenfield Trading Platform | London, Hybrid | Up to £120k + Bonus, Benefits ❗ Note: This role does not provide Visa Sponsorship ❗ 💹 Our client is looking for a Senior Full Stack Developer with strong expertise in C# to join them … West End) Key Responsibilities Design, develop, and maintain scalable applications within the trading ecosystem. Work across the full stack , with a primary focus on C# back-end development . Ensure performance, maintainability, and testability of all solutions. Work closely with business users to understand requirements and deliver high-impact ...

Senior Microsoft Stack Developer, C#, .NET, Azure, React, Central London, Mainly Remote Senior Microsoft Stack Developer required to work for an exciting and growing business based in Central London. However, this will be mainly remote and the expectation will … office circa twice a month. You will be hugely proficient in Microsoft Stack Technologies such as .NET, C# and Azure. You will also have experience with React, along with having some knowledge of and exposure to DevSecOps. Read on for more details... Experience required: Proven hands-on track record ...

C# Developer - Risk IT - sought by leading investment bank based in London - Contract - Hybrid *inside iR35* What You'll Be Doing Designing and developing enterprise-grade solutions in an Agile team. Building and maintaining middleware services using C# , REST APIs , FIX messaging , XML , and Microservices . … Bring A strong academic background in Computer Science, Engineering, or a related field. Proven experience in SOLID Principles/Design patterns Deep knowledge of C# .NET , RESTful services , and microservice architecture . Hands-on experience with FIX messaging , XML , AMQ , and ideally nHibernate , OData , and TDD . Excellent communication ...

Hiring: Junior C# Quantitative Developer | Hedge Fund | London (Hybrid) Are you a talented C# developer with a passion for finance, data, and quantitative problem-solving ? Join a leading hedge fund where technology and mathematics drive every decision. We’re looking for a Junior Quantitative … experienced quants, traders, and engineers — building and optimizing the systems that power our trading strategies. 💼 What You’ll Do Develop and maintain high-performance C# applications used in research, risk, and trading Collaborate with quants to implement pricing models and backtesting frameworks Enhance data processing pipelines and contribute ...

growing trading and technology business based in the City of London, and they're working closely with Tempest Vane Partners to find a Senior C# Software Engineer. With a collaborative team of researchers and software engineers, they are developing cutting-edge tools and platforms to analyse and trade across … balanced approach to work and life, alongside regular team socials and a supportive culture. What You'll Do Build and enhance applications using C#/.NET and SQL Server as part of a small but highly capable team. Contribute to new product development, shaping systems from early stages through ...

Title: C# Developer - Leading Trading Firm - Up to £100k + Bonus + Package Client: Elite FinTech Firm Experience Level: 2+ years' Salary: Up to £100k + Bonus + Package Location: London (Flexible Working) An elite fintech firm are searching for C# Developers to join a group … high performance tools - utilising cutting edge technology across a diverse range of greenfield projects Tech driven environment - most recent versions/frameworks of C# used daily Skills/Experience Strong knowledge of C# STEM degree - strong computer science fundamentals (Preferred ...

Role Type : Perm Title – Junior C# Engineer Client – Established Financial Institution Salary - Up to £80,000 P/A + Bonus Location – London/Hybrid My client is a well-established and successful tech house working in the finance sector who are looking a talented Junior C# Developer … technologists out there, one some of the most up to date tech in the industry, on a greenfields project! Requirements: Strong experience working with C#/.Net Experience working with Cloud Technologies (Azure preferred) Experience working with Typescript - Angular or React Strong SQL experience Finance experience a plus! Strong ...

Global bank based in Canary Wharf. Role - C# Developer - Desktop Applications Duration - 6 months with likely extension Rate - £415 p/d (inside IR35) Location - Hybrid/Canary Wharf Tech Stack C# WPF Winforms SQL Oracle Tasks Tasks range from understanding business requirements, designing application structures ...

partnered with a leading fixed income hedge fund in London seeking a talented C# Developer to join their front-office technology team. The fund has a strong and consistent performance track record and has invested heavily in its quant and tech capabilities as part of a wider … team multiple times so are able to go into detail regarding set up of the team and role The team primarily uses C# for core systems and Python within quant and data teams. C# and .Net experience and knowledge are essential for this role, but the fund will ...

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 10.0, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been … that are relevant, helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position to make decisions about ...

C# Oracle PL/SQL Developer for Tier 1 bank in Canary Wharf Role - C#, Oracle, PL/SQL Developer Duration - 6 months with very likely extension Location - Hybrid/Canary Wharf - 3 days per week in a Canary Wharf office Rate … Inside IR35) Tech Stack C# Oracle PL/SQL Data Lineage Documentation Role Primary responsibility will be to reverse-engineer complex source code to document data flows and transformations. You will collaborate closely with application teams, DBAs, and data governance specialists to ensure that lineage artifacts are complete ...

Leading Engineering Team at an Elite Financial Institution A top-tier FinTech firm is growing its elite engineering team and is seeking exceptional C# Engineers to help drive innovation in a fast-paced, technology-first environment. 🌟 What Makes This Opportunity Stand Out? Engineering-Driven Culture – Collaborate with top minds … London-based office. 🧠 Your Role Design, build, and optimize high-performance, low-latency systems for real-time financial applications. Develop scalable, efficient software using C#/.NET, with hands-on involvement in architecture and system design. Partner with Front Office, DevOps, and Quant teams to deliver robust solutions. Explore ...

will develop and consolidate systems, write software, guide a team of developers, and take ownership of several critical platforms. This includes an in‐house C# PnL and Risk system that performs real‐time portfolio valuation, alongside other components that will be integrated into a cohesive, modernised core platform. … date) accounting reconciliations Particular interest in candidates with Fixed Income and Rates experience Technical Skills Strong computer science fundamentals Hands‐on development experience in: C# and .NET (essential for this role) Python within quant or data environments The client will also consider exceptional engineers from other OOP backgrounds such ...

C#, .NET, .NET Core, SQL Server, T-SQL, Entity, Azure, App Services, Azure Service Bus, Event-driven architecture, API's, CI/CD, DevOps. We have 2 great permanent job opportunities to join our client in early 2026. A degree in computing, software engineering or computer science would ...

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 … real-time trading systems. Key Responsibilities: Design, develop, and optimize high-performance trading tools and data pipelines using C# and ideally Python Build research platforms that empower quantitative analysts and strategists Integrate and manage large, complex datasets from a variety of sources Collaborate with quants and PMs to implement ...

Working for a major energy trader (energy/renewables). We are recruiting Lead Developer/Tech Lead with a background in C#/.Net (and ideally Angular). The Role As a member of a skilled large global team (London, NYC, Mumbai) of software engineers … developing the core trading platform. The customers are varied; traders, analysts, researchers and data scientists. Essential Skills: 10+ years of experience working with C#/.NET (8) technologies 5+ years in a leadership role, managing 5+ software engineers (code reviews, architecture) Experience with RDBMS (Oracle, SQL Server, Sybase) Experience ...

Full Stack Post Trade Developer – Elite Systematic Hedge Fund – C#, Angular/React, SQL – London – Multiple Headcount – Market Leading Compensation One of the world’s most forward-thinking systematic hedge funds is expanding its Post-Trade Technology group and is hiring a Post-Trade Developer … developers in a lean, technically strong team where projects are shared and impact is visible. Tech Stack Frontend: Angular/React Backend: C# Database: SQL Server What They’re Looking For Strong full-stack engineer (C#, SQL + Angular/React) Experience building client-facing or external ...

Position:Senior Software Engineer (C#) Overview: System development for financial institutions Job Description: Due to the expansion of system development projects for financial institutions, we are seeking engineers with C#.NET Responsibilities: - Develop systems for financial institutions using C# - Design and implement functions from front-end to back ...