226 to 250 of 264 C# Jobs in London

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 ...

ensure high availability, and support scalable, resilient integrations across cloud and on-premises environments. This hybrid dev/SRE role requires both coding expertise (C#/.NET, Scripting) and operational proficiency in Azure governance, security, and observability. Experience in Financial Services/Asset or Investment management Responsibilities and Requirements Integration … Legacy systems. Implement automation for end-to-end processes: error handling, retries, dead-letter queues, notifications, and orchestration across services. Develop custom code (C#/.NET, JavaScript/TypeScript) for complex transformations, adapters, or extensions in Functions or Logic Apps. Azure API Management (APIM) Configuration & Management Configure and operate Azure ...

Junior Technical Consultant (Java/C#) – Energy/Commodities Trading | London Kick-start your career in one of the most specialised and high-value areas of technology and business: Energy & Commodities Trading and Risk Management. As a Junior Technical Consultant, you’ll undertake a rigorous six-month training programme , building … path from Consultant to Principal, to Managing Consultant to Director. What you’ll be doing: Designing and developing solutions using Java and/or C# Working across full project lifecycles: implementation, upgrade, and integration Contributing to system architecture, data modelling, and integration design Collaborating with traders, risk teams, and operations ...

Contract Software Engineers C# & C++ (Linux) Near Wimbledon, London 6 months Inside IR35 Were hiring two separate contract engineers to work on hardware-integrated software projects: Contract C# Software Engineer (Windows) C#/.NET Windows desktop applications (Windows Forms) Multi-threaded & networked applications TCP/IP, UDP Hardware/physical ...

Contract Software Engineers C# & C++ (Linux) Near Wimbledon, London | 6 months | Inside IR35 Were hiring two separate contract engineers to work on hardware-integrated software projects: Contract C# Software Engineer (Windows) C#/.NET Windows desktop applications (Windows Forms) Multi-threaded & networked applications TCP/IP, UDP Hardware/physical ...

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 ...

Power Apps, Dual-write, BYOD, Lifecycle Services (LCS), and environment monitoring. The ideal candidate will possess strong technical expertise across X++, .NET/C#, SQL, JavaScript, Visual Studio, and D365 extension frameworks. Key Requirements Strong hands-on expertise in Microsoft Dynamics 365 F&O Proven implementation and AMS/support … experience X++ .NET/C# SQL & JavaScript Visual Studio D365 Extension Frameworks Power Platform Azure Services, including Logic Apps, Functions, and Service Bus Experience with DMF, Data Entities, SSRS, ER, Dual-write, BYOD, and LCS Duration: Initial 1-month contract with strong possibility of extension Day Rate ...

Software Engineering Manager – Liquidity Management - Greenfield Project FinTech | SaaS | Cloud-Native | Azure | C#/.NET Ripple is hiring a Software Engineering Manager to lead the modernisation of our Liquidity Management platform , powering $100B+ in daily cash flow across 40+ countries. This is a rare opportunity to rebuild a mission-critical … within a You-Build-It-You-Run-It culture We’re looking for: • Proven Engineering Manager experience - leading teams of 5+ • Strong background in C#/.NET/SQL Server • Experience with cloud-native architecture (Azure preferred) • Agile delivery & engineering excellence mindset • Ability to scale teams and influence technical direction ...

Developer to contribute to the build of their industry-leading, massively scalable and reliable Portfolio Management System. The technology stack is comprised mostly of C# services which call into a proprietary C++ quant library and present results via a browser frontend. Hosted on Linux in AWS with large calculations distributed … party platforms via FIX feeds. Source control, CI, CD and issue tracking are all done in GitLab. Quants work on the C++ libraries and C# services. Some scripts and calibrations are run on a regular basis and these are written in Python. What You'll Get An opportunity to play ...

There are 2 versions of this ad. Below is the anodyne version. Bonus points if you can find the more analeptic version. And provide proof of your quest. Good luck! The Back-End Developer will ...

tables and datasets Support releases, deployments and production stability Participate in on-call/occasional weekend support Skills & Experience Strong application production support experience C#, ASP.NET, .NET experience Strong Oracle, PL/SQL and SQL skills Experience working with complex, data heavy systems Good communication and problem-solving skills ...

analysis. Hybrid role based in London (2 days per week in office) You will work in a team of 15, collaborating with C# developers and actuarial data scientists to deliver scalable features. The role Technical Challenge: Take ownership of performance bottlenecks involving 4GB+ datasets. Cloud Infrastructure: Utilize Azure PaaS tools … including Functions, Batch, Blob/Table Storage, and CosmosDB. Integration: Work on the integration and restructuring of Python and C# codebases to improve cohesion. Standards: Apply software engineering best practices including OOP, unit testing, and CI/CD. To be successful in this role, you must demonstrate specific experience ...

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 ...

Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first few weeks). C# Software Engineer skills required - Good analytical skills … large projects. Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. Strong Experience in developing Windows desktop applications in C# Interfacing with hardware/physical products .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. ...

Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first few weeks). C# Software Engineer skills required - Good analytical skills … large projects. Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. Strong Experience in developing Windows desktop applications in C# Interfacing with hardware/physical products .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. ...

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 ...

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 ...

Description Our client is a tier 1 investment bank who are looking for a C# .Net developer. Tasks include understanding business requirements, designing applications, business data analysis, programming in Visual C#.NET using both Oracle and SQL Server database, Unit testing, Quality Assurance (QA), Implementation, Production and Disaster Recovery environments supporting … users and preparing documents. Along with the application development, this role will also include supporting the existing C# and .NET applications. General IT Support to maintain environments where applications are running will be also essential. Responsibilities: Develop and maintain applications that integrate Fixed Income and Repo trades with downstream back ...

client is a tier 1 investment bank who are looking for a C# .Net developer. Tasks include understanding business requirements, designing applications, business data analysis, programming in Visual C#.NET using both Oracle and SQL Server database, Unit testing, Quality Assurance (QA), Implementation, Production and Disaster Recovery environments supporting users … preparing documents. Along with the application development, this role will also include supporting the existing C# and .NET applications. General IT Support to maintain environments where applications are running will be also essential. Responsibilities: Develop and maintain applications that integrate Fixed Income and Repo trades with downstream back office, settlement ...

Trading, Quant, and Technology colleagues across London, Hong Kong, and New York, contributing to a modern technology stack that includes TypeScript/React UI, C# services, PostgreSQL, and pricing services integrating with quant libraries. Required Skills & Qualifications: Strong experience in C# and modern backend development. Solid understanding of TypeScript … cross-time-zone collaboration. Day-to-day of the role: React/TypeScript UI (20%): Real-time risk visualisation, scenario tools, trader workflows. C# Backend Services (30%): Pricing requests, risk aggregation, workflow orchestration. PostgreSQL (20%): Schema design, performance tuning, data modelling. Pricing Services/Quant Integration (30%): Interfacing with quant ...

high-integrity industries including Fire, Security, Telecare, Retail, Water, and National Infrastructure. The Role You will: Build and maintain backend systems using .NET/C# Design clean, scalable, maintainable architectures Contribute to high automated test coverage across all services Translate business requirements into secure, performant backend solutions Collaborate closely with … front‐end, QA, product, and platform teams Solve complex technical challenges with elegant, thoughtful solutions Our Technical Environment Backend: .NET/C# Automated Testing: NUnit Solution Testing: Playwright Strong focus on: Reliability and performance Clean, maintainable code High‐level automated test coverage Scalable, production‐ready services Our Culture ...

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 ...

Detils: Role Name : C# Developer Type : Contract – Inside IR35 Location : Bromley (BR1 1LR), UK Hybrid/Remote : Hybrid – 2 to 3 days per week onsite Start Date : ASAP Duration : 2 Years Job Description: • This is a unique and exciting opportunity for a dynamic, enterprising mid-level developer to join … Optimize Treasury workstream, with a view to increasing STP Rates into Treasury and supporting additional attributes requested by different Treasury Teams. Must Haves : • Strong C# • Strong React • Strong Python • Solid hands on coding ability The ideal candidate will possess • 7+ year of technology development experience and specifically 3+ years ...