1 to 25 of 69 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 ❯

C# Developer, Microsoft Teams Integration, Remote, £425 day rate, Outside IR35, COR7386 We’re looking for an experienced C# Developer to join a 3-month contract role focused on building and integrating solutions within the Microsoft Teams and Microsoft 365 ecosystem. This position is fully remote, outside IR35, and offers an immediate start for … the right candidate. What’s required of the C# Developer? Strong experience developing with C# and .NET/ASP.NET Core Hands-on experience using the Microsoft Graph API Background in Microsoft Teams development, and a familiarity with the Microsoft 365 environment Knowledge of Azure AD, authentication protocols (OAuth 2.0), and RESTful APIs Experience working with JSON … webhooks, or event-driven architectures is a plus What Next? If you’re an experienced C# Developer with Microsoft Teams integration experience and you’re available immediately, apply today to find out more! C# Developer, Microsoft Teams Integration, Remote, £425 day rate, Outside IR35, COR7386 Corriculo Ltd acts as an employment agency and an 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 ❯

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 Onsite Working Financial Services Lorien's leading Investment client are looking for a C# Developer to join them on a contract basis on an 6-month contract. We are looking for a strong C# Developer who has experience of working within Investment Banking environments with strong communication skills. This More ❯

Senior Full Stack C# Developer Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary up to £65,000, plus excellent company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a … resident in the UK for a minimum of 5 years and have the right to work in the UK. Here at Triad Group, we're currently expanding our C#/.NET team and looking to bring on four experienced developers to contribute to an exciting Central Government project. This initiative is not only technically engaging but also offers the … unsafe products Powering systems that help the government monitor and reduce greenhouse gas emissions from commercial transport Role Summary Triad Group Plc is seeking a skilled and experienced Senior C# Developer to join our dynamic team. As a Senior Developer, you will be responsible for designing, developing, and maintaining software applications using .Net Core with More ❯

Senior Full Stack C# Developer Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary up to £65,000, plus excellent company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a … resident in the UK for a minimum of 5 years and have the right to work in the UK. Here at Triad Group, we're currently expanding our C#/.NET team and looking to bring on four experienced developers to contribute to an exciting Central Government project. This initiative is not only technically engaging but also offers the … unsafe products Powering systems that help the government monitor and reduce greenhouse gas emissions from commercial transport Role Summary Triad Group Plc is seeking a skilled and experienced Senior C# Developer to join our dynamic team. As a Senior Developer, you will be responsible for designing, developing, and maintaining software applications using .Net Core with More ❯

religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job Title : C# Developer Contract : Initial 6-Month Contract Location : London - 3 days a week in office Rate : £415 Are you a passionate C# Developer looking to … applications using the MS .NET platform. If you thrive on challenges and enjoy collaborating with various teams, we want to hear from you! What You'll Do: As a C# Developer, you will play a key role in the development and support of essential business applications. Your main responsibilities will include: Understanding Business Needs: Engage with stakeholders … C#.NET, interfacing with Oracle and SQL Server databases. Quality Assurance: Conduct unit testing and ensure quality at every stage of development. Support Existing Applications: Provide ongoing support for current C# and .NET applications, ensuring optimal functionality. Collaboration: Work closely with the IT department to maintain the environments where applications run. Additional Responsibilities: Define necessary database objects and liaise with More ❯

religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job Title : C# Developer Contract : Initial 6-Month Contract Location : London - 3 days a week in office Rate : £415 Are you a passionate C# Developer looking to … applications using the MS .NET platform. If you thrive on challenges and enjoy collaborating with various teams, we want to hear from you! What You'll Do: As a C# Developer, you will play a key role in the development and support of essential business applications. Your main responsibilities will include: Understanding Business Needs: Engage with stakeholders … C#.NET, interfacing with Oracle and SQL Server databases. Quality Assurance: Conduct unit testing and ensure quality at every stage of development. Support Existing Applications: Provide ongoing support for current C# and .NET applications, ensuring optimal functionality. Collaboration: Work closely with the IT department to maintain the environments where applications run. Additional Responsibilities: Define necessary database objects and liaise with More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM … exposure - OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM … exposure - OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM … exposure - OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM … exposure - OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid More ❯

C# .NET Developer Location: London (3 days onsite per week) Contract: 6 months Rate: £415 per day (via umbrella company) We're looking for a hands-on C# .NET Developer to join our JRIE Development team as an AVP. This is a fantastic opportunity to work on business-critical Windows applications in a collaborative … environment. If you have a passion for backend development, large-scale databases, and delivering high-quality code, we'd love to hear from you. Key Responsibilities Develop and maintain C# .NET Windows applications using SQL Server and Oracle. Translate business requirements into scalable technical solutions. Write and optimize SQL scripts (T-SQL and PL/SQL). Support production … procedures and maintain application change history. Provide occasional out-of-hours support (weekday/weekend). What We're Looking For Essential Skills & Experience Strong hands-on experience in C# and .NET development. Solid background in Windows application development. Proficient in SQL scripting, especially with large datasets. Understanding of MS .NET Framework and object-oriented programming. Excellent communication skills 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 ❯

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 ❯

C# Fullstack Developer Our investment bamkng client is looking for a highly skilled C# Fullstack Developer to join their London baseed team in a permananent capacity. Overview: We are seeking a highly skilled C# Fullstack Developer with experience in investment banking or large-scale enterprise environments. This role involves working closely … and maintain fullstack applications using modern technologies. Contribute to DevOps processes and CI/CD pipelines. Work with large data models and multithreaded systems. Essential Skills: Strong proficiency in C# and backend development. Frontend experience with Angular and AG Grid . Solid understanding of SQL Server and database design. Familiarity with Jenkins or other DevOps tools. Ability to build More ❯

C# Strategy Developer – Front Office Trading Overview Our client is a global quantitative trading firm that brings together exceptional talent in technology, trading, and quantitative research to compete in dynamic financial markets. Specializing in derivatives trading, market making, and systematic strategies, our client leverages cutting-edge technology and a collaborative culture to achieve sustained success. Within the … high-performance systems that empower traders and quantitative researchers to make data-driven decisions in some of the world's most competitive markets. Our client is seeking an experienced C# Strategy Developer to join its Front Office Trading Technology team in London. This role offers a unique opportunity to work closely with the Head of Trading Desk … is a high-visibility, high-impact position suited to skilled developers who thrive in fast-paced, collaborative environments where technology and strategy intersect. Key Responsibilities Design, build, and enhance C# applications that support and drive real-time trading strategies. Collaborate directly with traders, quantitative analysts, and the Head of Trading Desk to develop tools and analytics that enable informed 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 ❯