1 to 25 of 28 C# Developer Jobs in the City of 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 ❯

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 ❯

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 youll do: Write clean, scalable code in C# Drive innovation using AWS 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 | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | 800/Day Inside IR35 | 6-Month Rolling Contract Were 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 and … 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 Youll 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 model 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 (.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 ❯

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 – 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 ❯

My Financial Services client is seeking to recruit a C# .NET Developer on an initial 6 month contract based in London. It is hybrid and will require 3x days onsite per week. Essential: Strong background in C# programming and .Net technologies Strong Windows background Strong experience with relational databases and SQL Proven experience in continuous improvement … into application and operational requirements Good work ethic, with a focus on meeting deadlines and objectives Along with the application development, this role will also include supporting the existing C# and .NET applications. Strong hands-on skills for C# Windows applications is required. More ❯

As a C# skilled 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 to 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 and backtest trading models Ensure robustness and scalability in both real-time and batch environments What We’re Looking For: Strong … programming experience with C# Solid understanding of software engineering principles, design patterns, and performance tuning Experience in financial markets (equities, futures, FX, etc.) is a plus, but not required Familiarity with data science tools, APIs, and time-series databases is beneficial Self-starter attitude with a sharp eye for detail and a high level of ownership Why Join? Competitive More ❯

As a C# skilled 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 to 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 and backtest trading models Ensure robustness and scalability in both real-time and batch environments What We’re Looking For: Strong … programming experience with C# Solid understanding of software engineering principles, design patterns, and performance tuning Experience in financial markets (equities, futures, FX, etc.) is a plus, but not required Familiarity with data science tools, APIs, and time-series databases is beneficial Self-starter attitude with a sharp eye for detail and a high level of ownership Why Join? Competitive More ❯

Our Investment Banking client is looking for a highly skilled C# Fullstack Developer to join their London team in a permanent capacity. Skills required: Key Responsibilities: Collaborate with middle and back office teams to understand requirements and deliver robust technical solutions. Develop 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 strong relationships with stakeholders and communicate technical concepts clearly. Desirable: Experience in PnL systems , multithreading More ❯

Our Investment Banking client is looking for a highly skilled C# Fullstack Developer to join their London team in a permanent capacity. Skills required: Key Responsibilities: Collaborate with middle and back office teams to understand requirements and deliver robust technical solutions. Develop 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 strong relationships with stakeholders and communicate technical concepts clearly. Desirable: Experience in PnL systems , multithreading More ❯

Title: C#/.NET Developer Client: Elite Buy-Side Fund Salary: Up to £70,000 + Bonus + Benefits Location: London (Hybrid) The Opportunity: Seeking a Junior C#/.NET Developer to join their high-performing engineering team. This is an exceptional opportunity to work alongside experienced technologists and investment professionals building mission-critical … technologies, machine learning and cutting edge tools to advance competitive edge. Who You Are: Recent graduate with stellar academics and 1-5 years of relevant experience Strong proficiency in C# and .NET Experience with multithreading, asynchronous programming, and SQL Server Proven ability to tackle complex challenges with initiative and agility in high-pressure environments Apply now or reach out More ❯

Title: C#/.NET Developer Client: Elite Buy-Side Fund Salary: Up to £70,000 + Bonus + Benefits Location: London (Hybrid) The Opportunity: Seeking a Junior C#/.NET Developer to join their high-performing engineering team. This is an exceptional opportunity to work alongside experienced technologists and investment professionals building mission-critical … technologies, machine learning and cutting edge tools to advance competitive edge. Who You Are: Recent graduate with stellar academics and 1-5 years of relevant experience Strong proficiency in C# and .NET Experience with multithreading, asynchronous programming, and SQL Server Proven ability to tackle complex challenges with initiative and agility in high-pressure environments Apply now or reach out More ❯

Exciting opportunity for a Senior .Net C# Software Engineer with a background in front office trading to join a global Commodities Trading Company. You will be working in a front office trading environment dealing directly with business users & stakeholders. The role involves development & support of the existing platform for managing market and fundamental data across capture, forecasting and visualisation … for Power, Gas and Weather. Key Requirements - 15 year+ experience - Strong .Net/C# - Strong SQL Server - Strong Azure Cloud experience Ideally, you will have worked with modelling of commodities, ideally energy (power, gas, environmental products). This needs combining with a positive attitude and an ability to work within a large, globally dispersed project team in a multi More ❯

Exciting opportunity for a Senior .Net C# Software Engineer with a background in front office trading to join a global Commodities Trading Company. You will be working in a front office trading environment dealing directly with business users & stakeholders. The role involves development & support of the existing platform for managing market and fundamental data across capture, forecasting and visualisation … for Power, Gas and Weather. Key Requirements - 15 year+ experience - Strong .Net/C# - Strong SQL Server - Strong Azure Cloud experience Ideally, you will have worked with modelling of commodities, ideally energy (power, gas, environmental products). This needs combining with a positive attitude and an ability to work within a large, globally dispersed project team in a multi More ❯

C# Data Centric Developer with experience with real time analytical databases (non relational). 6 month rolling contract. 700/Day Inside IR35. Hybrid 2 Days in Central London. My client is a top tier commodities trading firm that is looking for a strong C# Data Engineer. The key things in summary are: Strong experience of … .NET C# Have you worked with an analytical database such as Clickhouse, SingleStore, Rockset, TimescaleDB? Have you got any experience working with an open standard datalake (e.g. Iceberg or Delta tables, Apache Spark, Column store) Have you got any experience processing (e.g. ingesting into a database) a large amount of data (in batches would be fine)? Required Skills and More ❯

Job Title: Front Office C#/Angular Developer Client: Quantitative Trading Firm – Elite, technology-led, and performance-driven Salary: Up to £85k + Exceptional Bonus + Package Location: London (Hybrid) Length: 6 Month FTC An elite global trading firm is seeking an experienced Front Office C#/Angular to join their front-office technology team in … years experience as a Quant Developer, Software Engineer, or similar front-office role within trading or hedge funds (also open to a vendor) Strong coding skills in C# and Angular (Python experience also valuable) Degree (or higher) in Computer Science, Engineering, or a related quantitative field Self-motivated, delivery-focused, and confident working in high-pressure environments More ❯