1 to 25 of 36 Permanent 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 on 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 an AWS environment, but also with exposure across the full technology stack in a modern development environment with … scratch. Location/WFH: You'll join colleagues in the London office Monday to Wednesday with flexibility to work from home Thursday and Friday. About you: You have strong C# .Net Core backend development experience You have a good knowledge of microservices and Cloud (AWS or Azure) experience, ideally, you'll have some experience with Docker/Kubernetes, EKS More ❯

Senior C# Developer/Backend Software Engineer (C# .Net) *Newcastle onsite* to £130k+ Are you a Senior C# Developer looking to escape the hustle and bustle of London and relocate to somewhere with stunning scenery and a better quality of life (there's also great restaurants and bars!)? You could be joining a … has secure backing and an established Hedge Fund client as a partner, they're creating a finance technology hub bringing a wealth of talent and experience. As a Senior C# Developer you will collaborate with a small, talented team to deliver the core trading platform within a Microsoft environment using the latest versions of C# .Net … backed by A*s and As at A-level You're a technologist who enjoys collaborating and problem solving, working on complex, distributed systems You have expertise with modern C# .Net Core, Python skills would also be of benefit You have a strong knowledge of modern software engineering best practices and have experience across the full software development lifecycle More ❯

Senior C# Developer – Endur Transition | Commodities Trading House | £120k + Bonus + Benefits | 2-3 Days Hybrid/Week in London A hands-on Senior C# Developer is required for a global trading company operating across energy, chemicals, metals, machinery, infrastructure, food, and financial services. With a strong footprint in energy trading , this client … oil, natural gas, LNG, and renewables . They are looking to bring someone on who is keen on learning and picking up on Endur for their ETRM systems. This C# Developer role will focus on building, enhancing, and optimising the company’s Energy Trading and Risk Management (ETRM) platform. You’ll be designing and implementing new solutions … a developer who can deliver immediate impact — coding, configuring, and optimising Endur to ensure scalability and performance when upgrading them from version 18 to 25. As a C# Developer focusing on Endur, you’ll work closely with business users, analysts, and other technologists to deliver solutions across front, middle, and back office , particularly around pricing More ❯

Senior C# Developer – Endur Transition | Commodities Trading House | £120k + Bonus + Benefits | 2-3 Days Hybrid/Week in London A hands-on Senior C# Developer is required for a global trading company operating across energy, chemicals, metals, machinery, infrastructure, food, and financial services. With a strong footprint in energy trading , this client … oil, natural gas, LNG, and renewables . They are looking to bring someone on who is keen on learning and picking up on Endur for their ETRM systems. This C# Developer role will focus on building, enhancing, and optimising the company’s Energy Trading and Risk Management (ETRM) platform. You’ll be designing and implementing new solutions … a developer who can deliver immediate impact — coding, configuring, and optimising Endur to ensure scalability and performance when upgrading them from version 18 to 25. As a C# Developer focusing on Endur, you’ll work closely with business users, analysts, and other technologists to deliver solutions across front, middle, and back office , particularly around pricing 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 ❯

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 ❯

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 and minimize the effect of security incidents, with the aim of … to minutes. Their solution is 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. 👀 Experience required as a C# Developer: Russell Group university 1st Class Degree in Computer Science (or related – Maths, Physics, Engineering) 2-6 years experience in C# (also open to Python & Go engineers) Strong computer science fundamentals End-to-end project experience (from design, to build, to deployment) 💡 What you’ll do: Write clean, scalable code in C# Drive innovation using More ❯

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 and minimize the effect of security incidents, with the aim of … to minutes. Their solution is 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. 👀 Experience required as a C# Developer: Russell Group university 1st Class Degree in Computer Science (or related – Maths, Physics, Engineering) 2-6 years experience in C# (also open to Python & Go engineers) Strong computer science fundamentals End-to-end project experience (from design, to build, to deployment) 💡 What you’ll do: Write clean, scalable code in C# Drive innovation using More ❯

C# DEVELOPER Commodities Trading firm is looking to grow their business and are hiring a Senior .NET Developer due to significant growth across their Front Office team. This is an extremely rare opportunity to break into the world of high-finance, trading and few and far between. £140-175k package This is an experienced … role within the team and the C# Developer will be expected to understand complex technical solutions and deliver in an Agile/SCRUM/Kanban environment. Requirements: C# - ESSENTIAL FRONT-END - VUE or similar - preferred AZURE - preferred TRADING - preferred The role is hybrid working, 2 days in lovely central London offices. Free cooked or contintal breakfast More ❯

C# Developer (Contract) – Investment Bank - Mid-Level/AVP Location: London (4 days in office) Contract: 6 Months Rate: £600–£800 per day Team: EMEA Markets Engineering We are supporting a leading global investment bank in their search for a mid-level C# Developer (Contract) to join the EMEA Markets Engineering team. This is … on the development side than operations, while understanding how these systems are managed in production the role includes: Maintaining and enhancing front-office pricing and risk systems built in C# Collaborating with quantitative analysts and traders to understand requirements and deliver effective solutions Troubleshooting and resolving production issues, ensuring smooth system operation Working with grid and cloud-based platforms … rather than leading large greenfield projects. Essential Experience: 4–7+ years of experience in quantitative development or technical roles supporting trading/risk systems Hands-on development experience with C# Understanding of derivatives, pricing, and risk concepts Exposure to front-office/trading environments in a financial institution Experience maintaining or supporting production systems (DevOps-lite, more dev than More ❯

C# Developer (Contract) – Investment Bank - Mid-Level/AVP Location: London (4 days in office) Contract: 6 Months Rate: £600–£800 per day Team: EMEA Markets Engineering We are supporting a leading global investment bank in their search for a mid-level C# Developer (Contract) to join the EMEA Markets Engineering team. This is … on the development side than operations, while understanding how these systems are managed in production the role includes: Maintaining and enhancing front-office pricing and risk systems built in C# Collaborating with quantitative analysts and traders to understand requirements and deliver effective solutions Troubleshooting and resolving production issues, ensuring smooth system operation Working with grid and cloud-based platforms … rather than leading large greenfield projects. Essential Experience: 4–7+ years of experience in quantitative development or technical roles supporting trading/risk systems Hands-on development experience with C# Understanding of derivatives, pricing, and risk concepts Exposure to front-office/trading environments in a financial institution Experience maintaining or supporting production systems (DevOps-lite, more dev than More ❯

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 from the ground up and currently expanding their team to … role is paying up to £130,000 + 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 of the … technology created/maintained by the delivery team. Develop Web Trading Applications using .Net, C# Develop solutions to a high standard that is maintainable, testable and meets the requirement’s acceptance criteria. Adhere to development best practices and processes. Communicate with team members, introduce ideas, and keep abreast of the latest technologies If you are interested in this Senior More ❯

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 from the ground up and currently expanding their team to … role is paying up to £130,000 + 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 of the … technology created/maintained by the delivery team. Develop Web Trading Applications using .Net, C# Develop solutions to a high standard that is maintainable, testable and meets the requirement’s acceptance criteria. Adhere to development best practices and processes. Communicate with team members, introduce ideas, and keep abreast of the latest technologies If you are interested in this Senior More ❯

C# Developer (.Net) Location: Canary Wharf Hybrid: 3 days onsite per week Rate: £415 per day (Inside IR35) Duration: 6 months initial contract with potential extension up to 2 years with a Permanent conversion option Positions Available: 13 positions Industry: Financial services Interview Process: 2 rounds of interview - Face-to-face interview only, and Technical assessment - Home … behalf of our client, a leading financial services company, within their Business Intelligence development team. The role focuses on developing and supporting business applications using the MS .NET platform (C#, Visual Studio) and working with both Oracle and SQL Server databases. You’ll be joining a collaborative team that delivers key business solutions across various environments. Key Responsibilities: Design … develop, and maintain business applications using Visual C# .NET with Oracle and SQL Server databases Provide ongoing support for existing C# and .NET applications, including troubleshooting and implementing solutions Write and optimise T-SQL and PL/SQL scripts for data analysis and reporting requirements Collaborate with Database Administrators, Technical Support, and Infrastructure teams across London and New More ❯

C# Developer (.Net) Location: Canary Wharf Hybrid: 3 days onsite per week Rate: £415 per day (Inside IR35) Duration: 6 months initial contract with potential extension up to 2 years with a Permanent conversion option Positions Available: 13 positions Industry: Financial services Interview Process: 2 rounds of interview - Face-to-face interview only, and Technical assessment - Home … behalf of our client, a leading financial services company, within their Business Intelligence development team. The role focuses on developing and supporting business applications using the MS .NET platform (C#, Visual Studio) and working with both Oracle and SQL Server databases. You’ll be joining a collaborative team that delivers key business solutions across various environments. Key Responsibilities: Design … develop, and maintain business applications using Visual C# .NET with Oracle and SQL Server databases Provide ongoing support for existing C# and .NET applications, including troubleshooting and implementing solutions Write and optimise T-SQL and PL/SQL scripts for data analysis and reporting requirements Collaborate with Database Administrators, Technical Support, and Infrastructure teams across London and New More ❯

This is a newly created position for a Senior .Net Software Developer based in Central London, paying up to £95,000. PLEASE … NOTE – this role is 5 days a week in the Oxford Street area of Central London. To be considered for this position you will be a highly experienced Lead C# Software Developer with solid Azure cloud experience. The ideal Senor C# .Net Developer will have previous experience with: C# & .Net Core React.js &/… and dedication my client is offering a salary of £95,000. If you are an experienced Senior Software Developer or Lead Software Developer with impressive C# skills and you are looking for a new challenge, please send me your CV immediately. More ❯

Now 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 Developer to work alongside 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 to performance optimization Gain exposure to financial markets, trading systems, and quantitative research 🧠 What … We’re Looking For Strong programming skills in C#/.NET Solid grasp of computer science fundamentals (data structures, algorithms, design patterns) Analytical mindset with a genuine interest in finance and quantitative methods Bachelor’s or Master’s degree in Computer Science, Mathematics, Engineering, or related field 🌟 Why Join Us Direct mentorship from experienced quantitative developers Opportunity to see More ❯

A global trading organisation is seeking a skilled C# Developer to join a high-impact team dealing with business critical projects. This an exciting opportunity to contribute to strategic solutions while being part of a broader modernisation programme into a cloud and data platform focused environment. As the business moves away from legacy systems and invests in … intersection of stability and transformation — ensuring continuity in existing applications while helping shape the future tech landscape. What You’ll Be Doing: Develop and maintain full-stack solutions using C#, SQL, and front-end technologies like React. Support mission-critical regulatory applications as part of a collaborative, Agile feature team. Contribute to the strategic migration from legacy platforms to … to deliver high-quality, scalable software in a Kanban Agile environment. What We’re Looking For: 3–6 years’ experience as a software engineer or similar. Strong skills in C#, SQL, REST APIs, and single-page web applications. Hands-on experience with Azure, Git, CI/CD, and DevOps tooling. Exposure to or interest in Python and Databricks as More ❯

A global trading organisation is seeking a skilled C# Developer to join a high-impact team dealing with business critical projects. This an exciting opportunity to contribute to strategic solutions while being part of a broader modernisation programme into a cloud and data platform focused environment. As the business moves away from legacy systems and invests in … intersection of stability and transformation — ensuring continuity in existing applications while helping shape the future tech landscape. What You’ll Be Doing: Develop and maintain full-stack solutions using C#, SQL, and front-end technologies like React. Support mission-critical regulatory applications as part of a collaborative, Agile feature team. Contribute to the strategic migration from legacy platforms to … to deliver high-quality, scalable software in a Kanban Agile environment. What We’re Looking For: 3–6 years’ experience as a software engineer or similar. Strong skills in C#, SQL, REST APIs, and single-page web applications. Hands-on experience with Azure, Git, CI/CD, and DevOps tooling. Exposure to or interest in Python and Databricks as More ❯

Role Type : Perm Title – Senior C# Engineer Client – Established Financial Institution Salary - Up to £140,000 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 senior C# Developer, with outstanding technical and communication skills to join … with some of the best 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 Communication skills with a drive More ❯

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, with outstanding technical and communication skills to join … with some of the best 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 Communication skills with a drive More ❯

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, with outstanding technical and communication skills to join … with some of the best 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 Communication skills with a drive More ❯

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 9, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage, and … customers by delivering inbound experiences 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 what should be created, and … roles would be suitable Graduate/Junior Developer who have recently graduated from university and have a basic understanding of any of the following technologies: Python, Linux, C# or Java; which might have been acquired as part of your degree course or through a placement year in industry. At the center of our client's culture is More ❯

Job Title: C# Software Developer Client: Elite Quant Trading Firm Salary: Up to £120K Base + Exceptional Bonus Location: London (Hybrid) What’s on offer: Cutting-edge technology, direct front-office exposure, and a highly technical environment We’re working with a leading quant trading firm that’s looking to bring top-tier C# Software Engineers More ❯

Paragon are working with a world class systematic hedge fund - after mutiple record breaking years they are scaling aggressively. We are searching for an elite C# Quant Developer to join a team working on building a platform which will enable the capturing of equity trade ideas. Focus: Develop tools and systems (often in C#/.NET … that help quants and researchers identify, test, and track trading opportunities. Translate research prototypes (e.g., from Python, MATLAB, or R) into production-quality C# code for real-time or batch execution. Design efficient data pipelines to ingest, clean, and store large volumes of financial and alternative data for use in signal generation. Improve computational efficiency and latency of backtesting … screening, or signal engines to handle high data throughput. Work closely with quant researchers to turn raw trading ideas into actionable, production-ready strategies. Tech: C#, Python, AWS If you are a an elite C# engineer - please get in touch More ❯