19 of 19 C# Software Engineer Jobs in the City of London

C# Software Engineer/Developer (Windows Desktop Trading Systems) London to £140k Are you a seasoned Software Engineer with strong C# 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 C# Software Engineer you will work on critical systems across front, middle and back office systems to 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 is a senior, hands-on position, you'll collaborate More ❯

C# Engineer - Europe's Top Hedge Fund. 12 month fixed term contract - up to £950 day rate. Hybrid working, 2 days a week from home. Europe's most highly regarded Quant research and Technology firm are after the top C# Engineers in the UK to come … Responsibilities Play an integral role in the greenfield build of some of the top performing trading systems in the world Develop API's in C# to enable system integration and scalable development of the firms trading systems and data platforms. Requirements 6 + years in OOP C# Experience More ❯

C# Engineer - Europe's Top Hedge Fund. 12 month fixed term contract - up to £950 day rate. Hybrid working, 2 days a week from home. Europe's most highly regarded Quant research and Technology firm are after the top C# Engineers in the UK to come … Responsibilities Play an integral role in the greenfield build of some of the top performing trading systems in the world Develop API's in C# to enable system integration and scalable development of the firms trading systems and data platforms. Requirements 6 + years in OOP C# Experience More ❯

C# Engineer - Europe's Top Hedge Fund. 12 month fixed term contract - up to £950 day rate. Hybrid working, 2 days a week from home. Europe's most highly regarded Quant research and Technology firm are after the top C# Engineers in the UK to come … Responsibilities Play an integral role in the greenfield build of some of the top performing trading systems in the world Develop API's in C# to enable system integration and scalable development of the firms trading systems and data platforms. Requirements 6 + years in OOP C# Experience More ❯

Job Description C# .NET Software Developer with FX and Fixed Income Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with … C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments … pricing APIs. Maintaining the company's daily operation on the existing platforms. Essential skills :- Minimum 3 to 5 years experience of Microsoft web technologies ( C#, ASP.NET Core MVC ) Relational database experience (SQL Server) Proactively able to build relationships with stakeholders:- sales, brokers, middle office, external vendors. Ability to produce More ❯

The Role We’re looking for Software Engineers to join our Joule Direct team, to help us build and improve our high-throughput, low-latency energy trading platform. You’ll be working with some amazing technologists to solve complex problems. For us, teamwork is everything. We listen to … code to reduce latency Do some design/planning with a colleague and raise an RFC Our Tech Stack Our services are written with C# on .NET 6 We use a fair bit of SQL Server, Kafka and RabbitMQ Azure DevOps. We are big fans of Azure Pipelines! Some … including planning, implementation and delivery Pairing with other engineers to share and expand your knowledge Contributing to technical discussions Skills & Experience Strong knowledge of C# or any popular programming language Excellent communication skills Can write efficient, concurrent code Knowledge of how distributed systems work Experience with Git, TeamCity and More ❯

The Role We’re looking for Software Engineers to join our Joule Direct team, to help us build and improve our high-throughput, low-latency energy trading platform. You’ll be working with some amazing technologists to solve complex problems. For us, teamwork is everything. We listen to … code to reduce latency Do some design/planning with a colleague and raise an RFC Our Tech Stack Our services are written with C# on .NET 6 We use a fair bit of SQL Server, Kafka and RabbitMQ Azure DevOps. We are big fans of Azure Pipelines! Some … including planning, implementation and delivery Pairing with other engineers to share and expand your knowledge Contributing to technical discussions Skills & Experience Strong knowledge of C# or any popular programming language Excellent communication skills Can write efficient, concurrent code Knowledge of how distributed systems work Experience with Git, TeamCity and More ❯

The Role We’re looking for Software Engineers to join our Joule Direct team, to help us build and improve our high-throughput, low-latency energy trading platform. You’ll be working with some amazing technologists to solve complex problems. For us, teamwork is everything. We listen to … code to reduce latency Do some design/planning with a colleague and raise an RFC Our Tech Stack Our services are written with C# on .NET 6 We use a fair bit of SQL Server, Kafka and RabbitMQ Azure DevOps. We are big fans of Azure Pipelines! Some … including planning, implementation and delivery Pairing with other engineers to share and expand your knowledge Contributing to technical discussions Skills & Experience Strong knowledge of C# or any popular programming language Excellent communication skills Can write efficient, concurrent code Knowledge of how distributed systems work Experience with Git, TeamCity and More ❯

Job Title: Lead Software Engineer, Principal Developer, Terraform, AZURE, C# 100% Remote UK Inside IR35, London (City of London) Client: Experis UK Location: London (City of London), United Kingdom Job Category: Other EU work permit required: Yes Job Views: 1 Posted: 25.05.2025 Expiry Date: 09.07.2025 … contract, with potential for extension. The role involves creating scalable, high-quality solutions, mentoring junior developers, and supporting ongoing projects. Responsibilities: Develop and adapt C#/.NET Core services to meet business needs. Mentor team members through pair programming, peer reviews, and team discussions. Support and improve existing systems … successful project delivery. Experience mentoring and working in agile teams. Strong diagnostic skills and support experience. At least 5 years of extensive experience with C# and .NET Core. Deep understanding of OO principles and SOLID design. Proven experience with Microsoft Azure and Terraform. Strong SQL and database design skills. More ❯

The Role Trayport is actively looking for a Senior Software Developer to join our team for the design and development of our flagship data analytics platform where you will contribute to System Architecture, aid colleagues to help coordinate our projects and review code too. Our platform ingests hundreds … market data feeds that together add hundreds of millions of data points to our dataset every day. We encourage ownership across the entire software lifecycle, and will value your input on each stage. We take an iterative approach to solve problems and continually improve our product. If you … hear from you. Responsibilities Contribute to System Architecture, Aid colleagues to help coordinate our projects Peer review code The Person Strong working knowledge of C# or Kotlin Experience writing efficient, concurrent .NET code Experience working on distributed systems Strong knowledge of Kubernetes and Kafka Experience with Git, and Deployment More ❯

The Role Trayport is actively looking for a Senior Software Developer to join our team for the design and development of our flagship data analytics platform where you will contribute to System Architecture, aid colleagues to help coordinate our projects and review code too. Our platform ingests hundreds … market data feeds that together add hundreds of millions of data points to our dataset every day. We encourage ownership across the entire software lifecycle, and will value your input on each stage. We take an iterative approach to solve problems and continually improve our product. If you … hear from you. Responsibilities Contribute to System Architecture, Aid colleagues to help coordinate our projects Peer review code The Person Strong working knowledge of C# or Kotlin Experience writing efficient, concurrent .NET code Experience working on distributed systems Strong knowledge of Kubernetes and Kafka Experience with Git, and Deployment More ❯

The Role Trayport is actively looking for a Senior Software Developer to join our team for the design and development of our flagship data analytics platform where you will contribute to System Architecture, aid colleagues to help coordinate our projects and review code too. Our platform ingests hundreds … market data feeds that together add hundreds of millions of data points to our dataset every day. We encourage ownership across the entire software lifecycle, and will value your input on each stage. We take an iterative approach to solve problems and continually improve our product. If you … hear from you. Responsibilities Contribute to System Architecture, Aid colleagues to help coordinate our projects Peer review code The Person Strong working knowledge of C# or Kotlin Experience writing efficient, concurrent .NET code Experience working on distributed systems Strong knowledge of Kubernetes and Kafka Experience with Git, and Deployment More ❯

We’re looking for a Backend Engineer to join our global team to be responsible for the quality, development, and execution of our software products. You will be part of a technology department that is comprised of a successful and multidisciplinary group of professionals located across …/collaborate with automation engineers to ensure business needs are met, and allow for regression testing Work closely with users to provide personalized software support as needed Stay updated on emerging technologies and industry trends to continuously improve our backend infrastructure Document application support and operational procedures Mentor … related field 3+ years of experience in software development, with a focus on building scalable and reliable systems Extensive knowledge of DotNet C#, LINQ, MS SQL, Entity Framework and related technologies Capable to use version control software such as GIT Knowledge of SOLID principles Knowledge More ❯

We’re looking for a Backend Engineer to join our global team to be responsible for the quality, development, and execution of our software products. You will be part of a technology department that is comprised of a successful and multidisciplinary group of professionals located across …/collaborate with automation engineers to ensure business needs are met, and allow for regression testing Work closely with users to provide personalized software support as needed Stay updated on emerging technologies and industry trends to continuously improve our backend infrastructure Document application support and operational procedures Mentor … related field 3+ years of experience in software development, with a focus on building scalable and reliable systems Extensive knowledge of DotNet C#, LINQ, MS SQL, Entity Framework and related technologies Capable to use version control software such as GIT Knowledge of SOLID principles Knowledge More ❯

We’re looking for a Backend Engineer to join our global team to be responsible for the quality, development, and execution of our software products. You will be part of a technology department that is comprised of a successful and multidisciplinary group of professionals located across …/collaborate with automation engineers to ensure business needs are met, and allow for regression testing Work closely with users to provide personalized software support as needed Stay updated on emerging technologies and industry trends to continuously improve our backend infrastructure Document application support and operational procedures Mentor … related field 3+ years of experience in software development, with a focus on building scalable and reliable systems Extensive knowledge of DotNet C#, LINQ, MS SQL, Entity Framework and related technologies Capable to use version control software such as GIT Knowledge of SOLID principles Knowledge More ❯

crucial role in creating high-quality, scalable, and resilient solutions while mentoring junior team members and supporting existing initiatives. Responsibilities: Create and adapt new C#/.NET Core services to meet evolving business requirements. Mentor and coach existing team members through pair programming , peer reviews , and team talks , helping … them improve their C#/.NET Core skills. Support and enhance current systems and initiatives during office hours, ensuring that service level objectives are met. Maintain a strong focus on quality, reusability, clean architectures, security, and resilience across the full application lifecycle. Collaborate with the Lead Developer, Delivery Manager … of an agile and self-improving team. Strong diagnostic skills and experience providing levels of support when issues arise. Extensive experience ( 5+ years ) with C# and .NET Core . Deep understanding of Object-Oriented (OO) concepts and SOLID design principles . Proven experience developing in Microsoft Azure and using More ❯

crucial role in creating high-quality, scalable, and resilient solutions while mentoring junior team members and supporting existing initiatives. Responsibilities: Create and adapt new C#/.NET Core services to meet evolving business requirements. Mentor and coach existing team members through pair programming , peer reviews , and team talks , helping … them improve their C#/.NET Core skills. Support and enhance current systems and initiatives during office hours, ensuring that service level objectives are met. Maintain a strong focus on quality, reusability, clean architectures, security, and resilience across the full application lifecycle. Collaborate with the Lead Developer, Delivery Manager … of an agile and self-improving team. Strong diagnostic skills and experience providing levels of support when issues arise. Extensive experience ( 5+ years ) with C# and .NET Core . Deep understanding of Object-Oriented (OO) concepts and SOLID design principles . Proven experience developing in Microsoft Azure and using More ❯

crucial role in creating high-quality, scalable, and resilient solutions while mentoring junior team members and supporting existing initiatives. Responsibilities: Create and adapt new C#/.NET Core services to meet evolving business requirements. Mentor and coach existing team members through pair programming , peer reviews , and team talks , helping … them improve their C#/.NET Core skills. Support and enhance current systems and initiatives during office hours, ensuring that service level objectives are met. Maintain a strong focus on quality, reusability, clean architectures, security, and resilience across the full application lifecycle. Collaborate with the Lead Developer, Delivery Manager … of an agile and self-improving team. Strong diagnostic skills and experience providing levels of support when issues arise. Extensive experience ( 5+ years ) with C# and .NET Core . Deep understanding of Object-Oriented (OO) concepts and SOLID design principles . Proven experience developing in Microsoft Azure and using More ❯

I am supporting a leading global FinTech based in London with their search for a Senior Software Engineer. You'll join one of their core engineering squads and work on one of their core platforms used by their global customer base. You'll be brought on to work … the project + all future stuff that comes your way (and there will be a lot!). They are looking for a passionate Engineer who can really drive the product and communicate/liaise with various stakeholders in the company. You will need to be a GREAT COMMUNICATOR … You will need to have an in depth understanding of: React.js - 6+ years (Solid understanding of fundamentals & up to date with latest tools) TypeScript C# .Net Node.js Azure What is also needed: Good Communication skills Stakeholder Management Fintech/Finance experience is a plus They have an amazing office More ❯