1 to 25 of 42 C# Developer Jobs in London

Senior C# Developer/Software Engineer (C# .Net) London onsite to £150k Opportunity to progress your career in a senior, hands-on C# Developer role at a global Asset Manager with c$3 million under management. As a Senior C# Developer within the trading engine team you'll collaborate to … ll often be collaborating with he strategy team on Greenfield projects which you'll take ownership of and will see the business impact of. There's a focus on C# .Net backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City office on … a fulltime basis, Monday to Friday. About you: You have expertise with C# .Net, ASP.Net development You have a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms You are collaborative with excellent communication and stakeholder management More ❯

JUser: :_load: Unable to load user with ID: 987 Job Summary Ambitious C# Developer looking to level-up! Ambitious C# Developer looking to level-up! Ambitious C# Developer looking to level-up! Posted Friday, 24 March 2017 Ambitious C# Developer looking to level-up! Are you a C# … the heart of Shoreditch? Yes, then seriously consider applying for this; With continued ambition, expansion and demand, our established media client has a great opportunity for a go-getting C# Developer. From the outset you will be working on a range of web-based solutions and with many more projects coming online, you will be quickly expanding your skills … before long you will be voicing your own ideas, fleshing them out and if they're good, getting them backed all the way! Right now you are comfortable with; C# SQL HTML CSS JQUERY SQL And soon after starting this role, you will be comfortable with; Web API IIS and Azure administration GIT/Bitbucket JIRA Google Analytics to More ❯

Senior C# Developer/Software Engineer (Windows Desktop Trading Systems) London to £140k Are you a Senior C# Developer with strong Windows desktop development skills combined with banking/financial services experience? You could be progressing your career at a Hedge Fund with over $10 billion under management. As a Senior C# Developer … support trading, operations, finance, compliance and investor relations, optimising system performance to ensure efficient real-time data processing, reporting and automation of operational workflows. You'll focus on building C#, WinForms, WPF desktop applications and design and implementation of scalable, service orientated architectures (SOA) but will also gain exposure to web applications using React and/or Angular. This … flexibility to work from home once a week; there's a friendly and collaborative environment with casual dress code and a range of facilities. About you: You have strong C# desktop development experience on Windows within a banking or financial services environment You have a strong knowledge of SQL databases You have a good understanding of asset classes e.g. More ❯

C# Developer/Software Engineer (C# .Net SQL) *London onsite* to £180k+ Are you a technologist with a record of academic achievement? You could be progressing your career working on complex and challenging systems at a Hedge Fund with over $17 billion under management. As a C# Developer you'll collaborate with a … minimum 2.1 in a STEM discipline from a top tier university (i.e. Russel Group or top 100 global university), backed by A grades at A-level You have advanced C# .Net programming skills including .Net Core (will also consider Java, Python or C++ background if happy to use C# going forward) You have a strong knowledge of SQL … entrepreneurial with good business acumen, keen to take ownership and lead projects You're collaborative, enjoy problem solving and sharing ideas What's in it for you: As a C# Developer/Software Engineer you will earn a competitive package: Salary to £180k Significant bonus earning potential Fund performance share Personal training budget and mentoring Family friendly More ❯

Fixed Income Senior Analyst Developer C# (VP) City of London Hybrid (3/2 split) 6-months contract £720 per day cer Financial are working alongside an international bank, who are based in the City of London. They are seeking a Fixed Income Senior Analyst Developer C# (VP) to work with them on a … months contract. The responsibilities of the Fixed Income Senior Analyst Developer C# (VP) will include: Responsible for effective and efficient running of the Fixed Income systems, integrated into the wider banks environment to meet the needs of the banks trading desks. Delivering fast-paced agile high quality software changes and solutions, help running Scrums, Sprints and creating … and deploying Releases. Providing guidance and advice on .Net, .Net Core, C#, and other development tools and languages, their usage and upgrades, and leveraging them to maximise the business benefit. Frequent .Net/C# tasks such as delivering new projects, improving and optimising the current setup, providing future-proofing guidance on all relevant data points. Promoting enterprise data More ❯

.NET C# Developer - FX Options - Pricing - Quant Libraries Contact email: Job ref: C Duration: Permanent Startdate: Negotiable C# Developer - FX Options Trading Technology We are currently seeking a skilled C# Developer to join the FX Options Trading Technology team at a leading global investment bank. This is a front-office role … for real-time pricing logic Partner directly with front-office users including traders, quants, and structurers to gather requirements and deliver solutions Required Skills and Experience Strong experience in C# development Proficiency in SQL Proven ability to work with large-scale, complex codebases Experience integrating with or working alongside quantitative libraries or models Solid understanding of FX Options and More ❯

Senior C# Developer - Apache Kafka, Azure, Microservices Up to £460 per day (Outside IR35) Primarily Remote Initially 3 months I am working with an instantly recognisable consultancy who require a C# .Net Developer with hands-on experience with Apache Kafka and Confluent Kafka, and a strong background in cloud-native development using Docker and … Azure.Key Requirements: Proven experience as a C# .Net Developer Strong experience in building and managing Kafka clusters and topics. Recent experience developing Microservice based solutions Strong knowledge of version control systems such as Git and associated CI/CD tooling (ideally with Azure DevOps, Jenkins or similar) Experience working with structured data formats and APIs (JSON Payloads More ❯

Role - Lead C# Developer, Fixed Income Location: London (Hybrid Working) Duration: 6-months Rate: Via umbrella Join one of the most stable and globally respected financial institutions as a Director-level Lead C# Developer within the Front Office Fixed Income technology team. This is a high-impact leadership role at the intersection of trading … Income technology team, you will work closely with the Product Owner, trading desks, and development leads to deliver high-quality, scalable solutions. This role combines deep technical expertise in C#/.Net with leadership in design, architecture, and delivery. You will represent the team across senior forums, partner with stakeholders globally, and ensure the technology stack remains cutting-edge … Own the design and delivery of software solutions supporting front-office Fixed Income trading Represent IT in strategy, planning, and architecture discussions at senior levels Provide technical leadership in C#, .Net Core, and SQL Server within a fast-moving Agile environment Contribute to IT strategy for Fixed Income, including integrations with tools like ION Anvil , Neptune , and Mosaic Smart More ❯

Lead Software Developer C# & .Net - CPS - G7 Full-time (Permanent) National - £56,640 - £65,490 London - £60,990 - £71,380 + £3150 RRA Published on 13 August 2025 Deadline 31 August 2025 Location Please note that this post can be based in any location within England and Wales, where a CPS office is located. Whilst it's … is a hands-on leadership role where you combine deep technical expertise with strategic influence, mentor others, and drive delivery across high-impact projects. You bring extensive experience in C# (ideally C# 12) and .NET 6-8, with a strong track record in designing and building scalable backend services and RESTful APIs using ASP.NET. Your understanding of cloud … in this role. The start date is expected to be 8-12 weeks after the application deadline. Your roles and responsibilities : You have an in-depth technical understanding of C# and .NET, and coach and mentor others in their use. Proficient in a range of development tools and skills relevant to your specialism, you are a committed learner who More ❯

Role : Lead C# Developer - Fixed Income Location : London, 3 days per week on site required Duration : 6-month contract Rate : Via umbrella company Are you a highly skilled C# Developer with a deep understanding of Fixed Income products and the confidence to take ownership in a front-office environment? Join a globally respected financial … will act as the key technical representative for the team, attending stakeholder meetings, partnering directly with Directors, and solving complex business problems with robust backend solutions. Working primarily with C# and SQL Server, you'll design and implement high-performance systems that support trading desks across the Fixed Income space. This role is ideal for someone who thrives on … enjoys building relationships with both IT and business stakeholders. Key Responsibilities Represent the IT team in meetings with Directors and business users Own and drive backend solution design using C# and SQL Server Collaborate closely with the Product Owner and senior stakeholders to understand requirements and deliver fit-for-purpose solutions Work hands-on across all stages of the More ❯

.NET Developer - Financial Trading - C#, React - London (Tech stack: .NET Developer, .NET 9, C#, React, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client, a market-leading financial trading firm, renowned for its innovation, lightning-fast technology and elite engineering culture, is seeking talented .NET Developer to join their award … to join a company where tech is not a support function, it is the business. The ideal candidate .NET Developer will have commercial experience working with .NET, C# and React.. Prior exposure to trading systems or financial services is highly desirable due to the nature of the role. Our client will provide training in: .NET 9, JavaScript … low-latency trading platforms and tools. This is a greenfield project and a chance to leave your mark on a business-critical system from day one. All .NET Developer positions come with the following benefits: Company shares 15% pension contribution Bupa private healthcare 3 hours per week of personal development time £4.5k annual training allowance 27 days holiday More ❯

.NET Developer - Financial Trading - C#, React - London (Tech stack: .NET Developer, .NET 9, C#, React, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client, a market-leading financial trading firm, renowned for its innovation, lightning-fast technology and elite engineering culture, is seeking talented .NET Developer to join their award … to join a company where tech is not a support function, it is the business. The ideal candidate .NET Developer will have commercial experience working with .NET, C# and React.. Prior exposure to trading systems or financial services is highly desirable due to the nature of the role. Our client will provide training in: .NET 9, JavaScript … low-latency trading platforms and tools. This is a greenfield project and a chance to leave your mark on a business-critical system from day one. All .NET Developer positions come with the following benefits: Company shares 15% pension contribution Bupa private healthcare 3 hours per week of personal development time £4.5k annual training allowance 27 days holiday More ❯

.NET Developer - Financial Trading - C#, React - London (Tech stack: .NET Developer, .NET 9, C#, React, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client, a market-leading financial trading firm, renowned for its innovation, lightning-fast technology and elite engineering culture, is seeking talented .NET Developer to join their award … to join a company where tech is not a support function, it is the business. The ideal candidate .NET Developer will have commercial experience working with .NET, C# and React.. Prior exposure to trading systems or financial services is highly desirable due to the nature of the role. Our client will provide training in: .NET 9, JavaScript … low-latency trading platforms and tools. This is a greenfield project and a chance to leave your mark on a business-critical system from day one. All .NET Developer positions come with the following benefits: Company shares 15% pension contribution Bupa private healthcare 3 hours per week of personal development time £4.5k annual training allowance 27 days holiday More ❯

.NET Developer - Financial Trading - C#, React - London (Tech stack: .NET Developer, .NET 9, C#, React, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client, a market-leading financial trading firm, renowned for its innovation, lightning-fast technology and elite engineering culture, is seeking talented .NET Developer to join their award … to join a company where tech is not a support function, it is the business. The ideal candidate .NET Developer will have commercial experience working with .NET, C# and React.. Prior exposure to trading systems or financial services is highly desirable due to the nature of the role. Our client will provide training in: .NET 9, JavaScript … low-latency trading platforms and tools. This is a greenfield project and a chance to leave your mark on a business-critical system from day one. All .NET Developer positions come with the following benefits: Company shares 15% pension contribution Bupa private healthcare 3 hours per week of personal development time £4.5k annual training allowance 27 days holiday More ❯

months contract with a global manufacturing client. The C# developer will be involved in the development and architecture of applications and services that process local data and integrate third-party web services. The successful C# developer will have proven and demonstrable experience with application development using C#. The Role: Software architecture, design, and development More ❯

Overview Company Global Investment Firm Position Senior C# Developer Impact Market Data Ingestion, Analytics, and Distribution Size Elite trading and tech teams across global markets Skills C#, Market Data, High-Performance Systems, Real-Time Infrastructure Location London (On-site) Hybrid On-site working (City-based HQ) Offer Highly competitive base + Bonus (Annual Review) Benefits … Days Holiday, Private Medical, Free Meals, Extensive Learning & Development The Role A global investment firm is seeking a Senior C# Developer to join their Market Data Technology function-an elite team responsible for building and maintaining the infrastructure that powers their global fixed income, FX, equity, and derivatives trading platforms. You'll work across real-time and … architecture and contributing to system scalability under peak load conditions Mentoring junior engineers and supporting broader technology roadmaps What Makes You a Great Fit 5+ years of experience in C# or Java , ideally within high-performance environments Deep understanding of market data infrastructure (feeds, storage, transformation, analytics) Strong knowledge of SQL Server and other database technologies (e.g. Redis) Familiarity More ❯

Software Developer/Engineer (C# TypeScript) London/WFH to £65k Would like to progress your career as a Software Developer, working on a modern, web based, tech stack with continual learning and development opportunities as part of a diverse team? You could be progressing your career at a global FinTech consistently voted as a … you'll collaborate to design and develop new features and enhancements to the company's flagship web based trading product. You'll focus on backend systems using C# and TypeScript but will also have exposure to front end components in Angular and React within a TDD environment. Location/WFH: You can work from home most of … you can you enjoy a range of facilities including large kitchen, café, roof top bar, showers and all the latest kit to work on. About you: You have backend C# .Net, ASP.Net MCV application development skills You also have experience with TypeScript, Angular or React You have a good understanding of Docker for Containerisation You have a good knowledge More ❯

.NET Core/C# Developer6 Month ContractLondon (Hybrid)Rates: Negotiable We’re partnering with a global trading organisation at the forefront of commodity markets, delivering high-performance solutions to support fast-paced, data-driven trading desks. This team builds and maintains cutting-edge tools that help traders make rapid, informed decisions in dynamic markets. The Role We’re seeking … a .NET Core/C# Developer with strong SQL Server skills to join a high-impact development team. You’ll be embedded in a trading environment, working closely with end users to deliver robust, efficient, and scalable solutions. Key Responsibilities Develop and maintain applications using .NET Core/C#, SQL Server Work closely with traders, analysts … to speed on the domain and current architecture Apply a pragmatic approach to problem-solving, balancing formal processes with real-world demands Essential Skills & Experience Strong .NET Core/C# development background Strong SQL Server expertise Experience in fast-moving, demand-driven environments (e.g. embedded desk development) Excellent communication skills and stakeholder engagement ability Proactive, quick learner with the More ❯

Senior Angular/C# Developer - Commodities/Shipping sought by leading financial services organisation based in West London. Outside IR35 - 3 days a week on site SUMMARY This role will suit a full-stack developer, with a broad, yet modern skill set and a proven track record, who ideally has some knowledge and experience of … the commodity or financial trading sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with … and identify creative solutions Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to More ❯

Senior Angular/C# Developer - Commodities/Shipping sought by leading financial services organisation based in West London. **Outside IR35 - 3 days a week on site** SUMMARY This role will suit a full-stack developer, with a broad, yet modern skill set and a proven track record, who ideally has some knowledge and experience of … the commodity or financial trading sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with … and identify creative solutions Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to More ❯

Senior Angular/C# Developer - Commodities/Shipping sought by leading financial services organisation based in West London.**Outside IR35 - 3 days a week on site** SUMMARY This role will suit a full-stack developer, with a broad, yet modern skill set and a proven track record, who ideally has some knowledge and experience of … the commodity or financial trading sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with … and identify creative solutions Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to More ❯

Role: Senior Full Stack Developer (C#/.NET) Salary: £90,000 - £130,000 + bonus + benefits Location: Central London - 5 days per week onsite Overview Our client is a high-performing, London-based investment management firm specialising in sports trading. Generating £6.11M in turnover last year, they operate globally across football, cricket, US sports, and more. … on greenfield projects with real-world impact, building predictive modelling systems that power automated trading and investment strategies. Key Responsibilities Design, build, and maintain full-stack software solutions in C#/.NET* Develop predictive models for real-time sports trading and analysis* Contribute to greenfield product development with autonomy and ownership* Collaborate across a highly technical team with strong … Solve complex, data-driven problems that have immediate business impact* Support system integration, testing, and deployment processes Ideal Candidate 5-10 years of software engineering experience* Strong proficiency in C# and the .NET platform* Solid foundation in mathematics, statistics, or quantitative problem-solving* Experience with SQL Server, Oracle, or similar RDBMS* Comfortable working in a fast-paced, collaborative environment More ❯

Python & C# Developer - Front Office Risk (VP) Commodities Tech Overview CITIGROUP is one of the largest players in the financial industry, employing more than 200,000 people across the globe. What We do/The Team The Commodities trading business at CITI has grown significantly in the last 10 years to become one of the leading industry … and day-to-day usage of the latest technology. Role Overview/What will you do: Services Development and maintenance: Design, develop and maintain high performing fault-tolerant Python (& C#/.NET) micro-services, in order to deliver a seamless user experience for our clients. Stakeholder Management : Work with Traders and Risk Managers to gather requirements, perform analysis and … A history of interacting with the trading desks and ability to analyse and address issues and queries quickly and effectively. Proven recent hands-on experience with Python (and ideally C#) plus SQL Server and/or Parquet. Evidence of strong delivery throughout the entire lifecycle. Strong problem-solving skills and capability to write code quickly and accurately to troubleshoot More ❯

The role is for a C# developer who will be working within a small team on Commodities Marking and Market Discovery Platform used by traders across the regions. We offer the opportunity to grow professionally, learn new technologies and gain business knowledge. Responsibilities: Develop thePlatform using C# with an opportunity to learn React during WPF to … to testing, documentation and release process as per business requirements and firm standards Collaborate with other global Commodities technology teams and more widely across markets technology Knowledge/Experience: C# development experience with understanding of multi-threading JavaScript, Python, WPF, messaging, React and/or Angular are a plus but not required Experience in financial services is a plus More ❯

Senior Lead C# Software Developer We urgently require a Senior C# Lead Developer with at least 5 to 10 years solid expertise in developing financial systems ideally banking systems. Your experience should include extensive knowledge of developing complex financial systems in C# as Teal Leader. Any experience of SQL Server or backend database More ❯