26 to 39 of 39 C# Jobs in the City of London

Senior Software Engineer who thrives on untangling complex systems and modernising core infrastructure without breaking production. This is an exciting opportunity to modernise core C#/SQL systems! Extract legacy business logic, build clean services, and verify changes in shadow mode with zero downtime to revenue flows. Extract business rules … scattered across C#, embedded JavaScript and undocumented SQL stored procedures into a clean, tested, dependency-free rules assemblies. Build new services cleanly. with proper Dependency Injection (DI), robust authentication/authorization, structured logging, and full observability. Work fluently across both legacy .NET Framework 4.8 (ASP.NET MVC5, WebAPI ...

solutions Building plugins, workflows, custom APIs and integrations Developing Azure-based integrations using Logic Apps, Function Apps and Service Bus Delivering high-quality C# and .NET solutions Implementing and supporting CI/CD pipelines and ALM processes Supporting secure development practices including OAuth and Key Vault Writing automated tests … demonstrate strong experience across most of the following: Dynamics 365 CE/CRM development Plugins, workflows and custom APIs Dynamics 365 configuration and customisation C# .NET Framework/.NET Core JavaScript, TypeScript, HTML and CSS Web APIs and integration services Azure Functions Azure Logic Apps Azure Service Bus Azure ...

manage a cross-functional development team Coach, mentor, and motivate team members Recommend changes in development and system standards Develop custom applications in C#/.Net and Microsoft Azure Develop integration services and APIs Leverage cloud technologies and DevOps practices for solution development Create conceptual architecture and solution design materials … value projects and driving this to bigger opportunities Ability to lead application transformation discovery, design and delivery, including integration platform transformation Advanced expertise in C#/Net Knowledge of Microsoft Azure AI and experience in use of GitHub Copilot to support architecture design and delivery Proficient in RESTful services, Microservices ...

hour, multi‐region trading operations (follow‐the‐sun handover, timezone‐aware processing across London/New York/Singapore). Expert‐level C#/.NET (LTS): back‐end services with ASP.NET Core. Experience designing and delivering event‐driven, service‐oriented back‐end systems (message brokers, async workflows, API design ...

Senior C# Engineer .NET 9/10, AWS Lambda, SQS, SNS OUTSIDE IR35 £700£800 per day Outside IR35 100% Remote 9 month rolling contract Takeaway: Contribute to the architecture and build of a major greenfield B2B SaaS platform as a deeply senior, hands-on C# engineer, with heavy emphasis … chance to adopt modern AI-assisted development practices as part of your workflow. What Youll Bring: Senior/Staff-level backend mastery in C# and .NET 9/10 , with the ability to architect and lead distributed REST microservices at scale. Strong authority in AWS serverless engineering: Lambda-first mindset ...

join a high-performing technology team responsible for architecting, developing, and enhancing sophisticated trading and research systems. This role would suit a strong C#/.NET engineer who enjoys solving complex technical problems and wants to have genuine influence over the architecture and direction of the systems they build. … engineering best practices, while working closely with researchers, traders and other technical specialists. Key Responsibilities Design, develop and maintain high-performance applications using C# and modern .NET Take ownership of significant software development projects from initial design through to production Contribute to and lead architectural and technical design decisions Design ...

focused on delivering bespoke integrations between internal systems, cloud platforms and third-party applications. The ideal candidate will have strong experience across Azure and C#/.NET , alongside a proven background in developing and supporting complex integration solutions. Candidates with strong integration experience using Python or other comparable programming languages … maintain integrations with third-party applications and services. Build and support cloud-based solutions using Microsoft Azure . Develop integration components and applications using C#/.NET or another suitable programming language. Work with APIs, web services and other integration technologies. Troubleshoot and resolve complex integration and application issues. Work ...

focused on delivering bespoke integrations between internal systems, cloud platforms and third-party applications. The ideal candidate will have strong experience across Azure and C#/.NET , alongside a proven background in developing and supporting complex integration solutions. Candidates with strong integration experience using Python or other comparable programming languages … maintain integrations with third-party applications and services. Build and support cloud-based solutions using Microsoft Azure . Develop integration components and applications using C#/.NET or another suitable programming language. Work with APIs, web services and other integration technologies. Troubleshoot and resolve complex integration and application issues. Work ...

Senior Full Stack Lead Engineer ReactJS, TypeScript, JavaScript, C#/.NET Banking London This is a new and exclusive opportunity for a Senior Full Stack Lead Engineer/software developer with expertise across ReactJS, TypeScript, JavaScript, C#/.NET to join this investment Banking client as they expand their full … stack software developer team in London city. Role details Title: Senior Full Stack Lead Engineer Technical stack: ReactJS, TypeScript, JavaScript, C#/.NET Employer: investment Banking Location: London City and home working hybrid 50/50% Permanent role, salary £90,000- £130,000 plus bonus This is a new opportunity ...

Mentor engineers and graduates; set quality and engineering standards through code review and design guidance What we're looking for Senior Software Engineering experience – C#/Python/SQL Strong technical depth in C# and full‐stack debugging across distributed systems Domain knowledge of investment operations, asset management workflows ...

Software Developer Key Technologies: C#, .NET, .NET Core, Azure, SQL London Perm Role | Hybrid Working Structure £50,000 - £60,000 Harrington Starr has partnered with a global Investment Bank who are looking to hire a seasoned Senior C# Developer with extensive experience developing from Back to Front Office trading systems. … Responsibilities: Design, develop and maintain Front Office systems written in C#, ,NET Collaborate closely with a variety of internal and external stakeholders around the globe from product managers to traders Developing with the existing systems technologies and integration with cloud based architecture (azure) Strong business knowledge with Post Trade systems ...

join our London team in a hybrid role with two days per week at our HQ. You’ll work on a dual-stack C#/.NET and TypeScript frontend, building scalable APIs and modern microfrontends for the estate industry. You’ll own features end-to-end, collaborate with product ...

working with a Global Commodity Trading Company based in London who are searching for a Lead C# Developer. They are looking for a hands-on Software Engineer to lead a small but scaling team of developers in their IT function. This is a modern technical environment so you will need … good hands on grasp of C# and some front end technology. Requirements) 5+ years of commercial experience in C# Some exposure to front end technology: Angular/React current experience working in a trading environment (financial, commodity etc) Understanding a full trade lifecycle Exceptional communication skills Ability to make both ...

Finance Customise, enhance, develop, test and optimise reusable components from within the MS stacks to supplement the core product offering using skills in SQL, C# (where applicable), Azure Integration Services, RESTApis and related tools Leverage Power Platforms (Logic Apps, Power Apps/Canvas Apps, Power Automate) to automate workflows across … Expert Sierra), Elite3E, PracticeEvolve, ProClaim. Solid understanding of core integration techniques utilising a range of the following skills SQL, REST APIs, Service Bus and C# (where applicable) Excellent vendor, stakeholder engagement, communication, training and documentation Experience of aspects of product ownership including roadmap development and backlog management Excellent opportunity ...