76 to 95 of 95 C# Jobs in the City of London

experienced developers, researchers, and traders, you'll play a key role in delivering reliable and scalable solutions. Our client's technology stack primarily includes C#, .NET, SQL Server, and ASP.NET, and you'll receive mentorship to help you grow your expertise in these areas. Key Responsibilities Assist in designing, developing … maintaining applications using C# and .NET Support the development of scalable systems for trading and research Contribute to database development and optimisation (SQL Server or similar) Collaborate with senior developers, researchers, and traders to deliver software solutions Participate in code reviews and adopt best engineering practices Help improve system performance ...

queries, stored procedures, and data processing logic to handle high-volume structured data Design and implement backend services using modern programming languages (Python or C#) Support and enhance existing legacy platforms, identifying opportunities for iterative modernisation Improve query performance through indexing strategies, query optimisation, and data processing efficiency Enhance platform … Server skills, including complex queries, stored procedures, indexing, and performance tuning Experience working with large relational datasets Solid backend development experience in Python or C# Experience working in AWS environments Experience with complex enterprise or legacy systems Strong analytical and problem-solving abilities Ability to operate autonomously with minimal onboarding ...

Senior Software Engineer (.NET/C#) | Greenfield Systems Rebuild | Remote (UK) | £80,000-£100,000 This is a hands-on senior engineering role with real technical authority. You will be the lead engineer and technical decision-maker on a greenfield rebuild of a mission-critical system, working within a small … planning. WHAT WE'RE LOOKING FOR Must-have 5+ years in senior software engineering or technical lead roles, with strong hands-on .NET/C# delivery. Demonstrable experience leading architecture decisions on production-grade systems, not just contributing to them. REST API design and integration experience at scale, including defining ...

with pragmatic, commercial solutions. You’ll have direct interaction with PMs, quants, and the CTO, contributing across design, architecture, and production support. Tech Environment C# and .NET are central to the team’s core systems Python is widely used across quant and data groups Open to candidates from other … essential, but interest in Fixed Income/Rates is beneficial Requirements Strong academic background in Computer Science or related field Excellent programming ability in C# and .NET Experience with large or complex data sets 1–5 years’ experience in a software engineering role Interest in finance; exposure to fixed income ...

will develop and consolidate systems, write software, guide a team of developers, and take ownership of several critical platforms. This includes an in‐house C# PnL and Risk system that performs real‐time portfolio valuation, alongside other components that will be integrated into a cohesive, modernised core platform. You will … date) accounting reconciliations Particular interest in candidates with Fixed Income and Rates experience Technical Skills Strong computer science fundamentals Hands‐on development experience in: C# and .NET (essential for this role) Python within quant or data environments The client will also consider exceptional engineers from other OOP backgrounds such ...

.NET Developer, C#, WPF - Asset Management - London (Tech stack: .NET Developer, .NET 10.0, C# 14, WPF, Azure SQL, MVVM, Prism, TDD, Agile, Programmer, Engineer, Architect, .NET Developer) Founded in 1930, our client is a leading investment manager with offices in Europe, Asia and North America. They manage over £120 billion … across all asset classes and employ over 2000 people around the world. Working in tandem with Microsoft they are developing revolutionary .NET/C# software applications that have attracted much attention in the trade press. We are seeking two .NET Developer to work on these exciting Greenfield enterprise level .NET ...

.NET Developer, C#, WPF - Mobile Telecommunications - London (Tech stack: .NET Developer, .NET 10.0, C# 14, WPF, Azure SQL, MVVM, Prism, TDD, Agile, Programmer, Engineer, Architect, .NET Developer) Established in the early 1990s and listed on the London Stock Exchange our client is an instantly recognizable brand within the mobile telecommunications … launch of several new products. As such they are looking to recruit 6 .NET Developer to help design and develop the .NET/C# software applications that will be the backbone of this exciting new generation of products and services. The ideal .NET Developer candidates will have a skill ...

Lead C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product . Were looking … twinned with experience of AI-Native Engineering and Agentic Workflow . Skills Were Looking For: SeniorStaff-level backend engineer with deep, current expertise in C# and .NET Core 8/9 , capable of architecting and leading the design of distributed REST API microservices at scale. Authority in AWS serverless architecture ...

Senior C# Engineer City of London (On-site) Permanent | £90,000 – £120,000 We’re partnered with an innovative proprietary trading firm in the City of London that is hiring a Senior C# Software Engineer . You’ll work on greenfield projects, cutting-edge technology, and play a key part … culture where innovation and creativity are encouraged Great work-life balance supported by wellness perks, healthcare, and team socials Key Requirements Strong background in C# and the .NET platform (working with the latest versions) Database knowledge (SQL Server, Oracle, or equivalent) Degree in Computer Science or related subject Fluent ...

What You'll Do Develop and optimise SQL Server queries, stored procedures, and data processing logic Design and build backend services in Python or C# Modernise legacy platforms and improve system performance Build and maintain AWS-hosted services and APIs Collaborate with distributed engineering and product teams Top Skills Required … Advanced SQL Server expertise (performance tuning, indexing, complex queries) – non-negotiable Backend development in Python or C# AWS environment experience Proven experience in enterprise or legacy systems – critical Strong analytical and problem-solving abilities We'd expect you to have around 10 years of software and data engineering skills. Nice ...

Principal SQL Developer – Trading Desk | SQL Server, C#/.NET, Concurrent SQL environment | 25-Year Systematic Hedge Fund £140k-£180k circa base + bonus (up to 100%) City of London, on-site Mon-Fri Our client, an algorithmic trading hedge fund with a 25-year track record in systematic trading … core business logic sits in SQL stored procedures, and the role spans both the database and application layers across SQL Server and C#/.NET systems while acting as a key link between the trading desk and wider engineering team. Non-Negotiables SQL Server Concurrent SQL environments Stored Procedures Complex ...

Backend Software Engineer/Developer (Windows C/C++, C#) London to £75k FTC Are you a skilled Backend Software Engineer with strong C++ skills? You could be progressing your career in a senior, hands-on role at a global market data provider. As a Backend Software Engineer you will … time and low latency, maintaining data feeds and developing key underlying transport protocols for data transmission. The platform has been built with C++ and C# deploying to AWS and requires high scalability and low latency - they currently handle 40 billion messages per day. Location/WFH: You'll join colleagues ...

About the job C#/.NET Engineer (Commodities/Derivatives) | £75k - £95k | London (Hybrid) We’re looking for a strong C#/.NET Engineer to join a Back Office IT team within a financial markets environment. This role combines hands-on development with ownership of critical systems, supporting core operations … broader data platform transformation. What you’ll be doing: Supporting and enhancing existing back-office trading applications Designing and building backend solutions in C#/.NET Working closely with stakeholders across trading, risk, and operations Contributing to data platform initiatives (Azure Data Lake/Databricks) Maintaining and improving performance ...

Front Office C# Developer - Commodities Derivatives Day Rate: Up to £750/day (Umbrella) Duration: 6 months initially Location: Marylebone - London Working Arrangement: Hybrid - 3 days per week onsite We're looking for a Front Office C# Developer to join a London-based leading Global Markets business team supporting … Ensure platform stability through robust testing and release control. Follow team standards for code review, deployment and architectural governance. Essential Strong commercial experience with C# Solid SQL Server experience Background working on complex, business critical platforms Experience with commodities and/or derivatives products Organised, delivery-focused, and comfortable working ...

Lead Unity Developer (C# Games) Remote UK to £90k Do you have a strong technical background with Unity and C#, now more people and management focussed? You could be progressing your career at a growing games company that combines state of the art technology, gaming and luxury fashion. … visa restrictions. About you: You have strong people management and technical leadership skills and experience You have a strong technical background with Unity and C# development within a games environment You're able to provide technical guidance, problem solving and remove any blockers You have advanced communication, collaboration and stakeholder ...

delivery of a bespoke research and risk assessment tool built in Dynamics. Write, review, and validate code written in C#, ensuring alignment with development standards and governance. Work across both project delivery and BAU, including backlog ownership and triage support. Collaborate with onshore and offshore resources to deliver high-quality … Dynamics Developer will possess: 5+ years’ experience in software development, with strong exposure to Microsoft Dynamics and Power Platform. A solid development background in C# .Net, with the ability to understand legacy code. Experience delivering custom Dynamics solutions (not just configuration/customisation). Understanding of Power Platform (Power Apps ...

Full Stack Software Engineer (C#/React) – Broadcast & Video Technology Location: London Area - Hybrid Full-Time Contract Rates: Negotiable We are looking for a versatile Full Stack Software Engineer to join our engineering team working on cutting-edge solutions in the broadcast and media technology space . This role combines … stakeholders to deliver high-quality solutions Contributing to and improving CI/CD pipelines and development workflows Technical Skills & Experience Strong experience with C# Strong experience building modern UIs with ReactJS Building and supporting APIs and microservices Working with databases such as Oracle and/or Couchbase Cloud experience Understanding ...

experienced senior developer to build on their experience in Commodities or similar trading development role in this successful Commodities Trading company. The Senior C# Developer will have significant prior experience as a Senior Software Engineer/Senior Developer working as C# Developer in a Commodities trading environment where they will … business as well as senior technical colleagues such as architects. Central London location, with Hybrid working expected. Very strong core skills in C# are expected Good knowledge of Commodities Trading is also required. Please apply now if your curious to learn more, for a confidential discussion about the role ...

Lead Unity Developer (C# Games) Remote UK to £90k Do you have a strong technical background with Unity and C#, now more people and management focussed? You could be progressing your career at a growing games company that combines state of the art technology, gaming and luxury fashion. ...

Lead C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product click apply for full ...