101 to 125 of 219 C# Jobs in the City of London

funded project in the firm. This role applies to a developer using any programming language as they use a range from Java/Scala/Kotlin to Python/C#/F# and C++. Additionally, this is a great opportunity to pick up any new technologies as the ideal candidate is someone who can cross train into other tools to More ❯

You will be leading a team and providing technical leadership and doing requirements gathering, whilst still remaining hands on in the code. Must-haves: Senior-level experience developing in C#, .NET Core Strong understanding of APIs using ASP.NET, MVC, Web API, etc. Experience working on Event Driven Architectures and Event Sourced Architectures Solid understanding of distributed systems design, resilience, and More ❯

analysts. The ideal candidate should have; Experience in insurance architecture, preferably within the London Market. Familiarity with Policy Administration Systems (PAS) is desirable. Proficiency in .NET Core, ASP.NET, and C# for backend development. Practical experience working within Agile software development lifecycles. Understanding of Azure. More ❯

Assist with modernising and automating legacy processes. Play a key role in the design, testing, and deployment of new data solutions. Technology Stack: Azure SQL, SSIS, Power BI, PowerShell C# (used for testing automation) Excel/Power Query CI/CD tooling What We’re Looking For: A hands-on data engineer or BI engineer with solid SQL skills and More ❯

team’s project leader IT and Strong Skills Required: Proficiency in object-oriented programming Solid understanding of architectural patterns (e.g., n-tier, MVVM) Preferred: Experience with the .NET framework, C#, WPF, Angular Familiarity with frameworks such as Unity, Spring, Prism, or Castle Business and Technical Exposure Experience in financial markets, ideally with commodities (e.g. oil, gas, power) Solid understanding of More ❯

reliable user experiences — apply a keen eye for detail and modern design principles to create polished, user-friendly interfaces. About You Proven experience in either Python, Go, Ruby or C# PostgreSQL & AWS Strong analytical and problem-solving skills Excellent communication and interpersonal abilities Ability to thrive in a fast-paced, collaborative environment Nice to have CI/CD Docker, Kubernetes More ❯

services. Experience: D365 & Power Platform Lead Developer or Technical Lead experience. Model Driven and Canvas Apps experience. Power Automate, Power Pages, and Logic Apps expertise. Strong coding skills in C# .NET and JavaScript. Experience with Azure, including YAML pipelines. Knowledge of PowerBI and Service Bus (preferred). PL-400 certification (preferred). Excellent stakeholder management and communication skills. Salary: Up More ❯

with infrastructure-as-code tools such as Terraform or CloudFormation Experience of working in a fast-paced product-focussed environment Good understanding of other programming languages such as Java, C#, C++, Rust, Go or Python Experience in healthcare or finance domains Other stuff Salary up to £120,000 basic 10% bonus Hybrid working – 3 days in London (Tues-Thurs) – some More ❯

a team of junior engineers to collaborate on projects. Required Skills: Strong experience with at least one of the following languages: Python, JavaScript, Java, Go, Rust, C/C++, C#, or Ruby. Experience working with well-maintained, widely-used repositories with 500+ stars Proficiency with Git, Docker, and basic software pipeline setup. Ability to understand and navigate complex codebases. Comfortable More ❯

The ideal candidate will work as a Senior Solutions Architect in Engineering Divison, the individual will be responsible for designing solutions for varied trasnformational and operational risk iniatives across all the Index Platform estate. The candidate will hold specialization in More ❯

AWS Dev Ops Engineer – Financial Markets - £100,000-£120,000 AWS Dev Ops Engineer with a broad experience across both Linux and Wintel, required to lead on automated software delivery for a major UK trading house. There is a particular More ❯

C# Developer – FX Options Trading Technology We are currently seeking a skilled C# Developer to join the FX Options Trading Technology team at a leading global investment bank. This is a front-office role, working closely with traders, quants, and structurers to build cutting-edge trading tools. The team is responsible for developing applications that enable traders to price and … for real-time pricing logic Partner directly with front-office users including traders, quants, and structurers to gather requirements and deliver solutions Required Skills and Experience Strong experience in C# development Proficiency in SQL Proven ability to work with large-scale, complex codebases Experience integrating with or working alongside quantitative libraries or models Solid understanding of FX Options and related More ❯

C# Engineer | Global Hedge Fund | London [On-Site] We are working on behalf of a highly collaborative hedge fund with a global presence. The fund has a strong track record of performance and has committed significant resource to further expanding their established front-office engineering team. At this moment, the fund are looking to hire a couple C# engineers … and being central to the shaping of a systematic business expansion. In this role, the successful applicant(s) will be supporting the development and maintenance of performative and responsive C# applications that enable the front office business to operate and function. Concomitantly, you will be working closely with key business stakeholders throughout the business across a range of novel and More ❯

a service platform that automates contact operations across voice, email, chat and SMS, enabling humans in the loop where necessary. Overview: We’re hiring for a Product Engineer (backend C# .net core) to join our founding team. The role will focus on backend development that blends email, chat, telephony, voice AI and LLMs. You’ll play a key role in … a startup environment, this role is for you. Key Responsibilities: Communicate clearly, seek clarification when needed. Navigate ambiguity and working with minimal supervision. Develop and maintain backend services using C# and .NET Core. Design and test REST APIs with JWT-based authentication (OAuth is desirable for the future). Write performant SQL for PostgreSQL databases; help design schemas and queries. … Twilio, ChatGPT, and ElevenLabs. Maintain compliance and security in systems handling sensitive financial or personal data. Requirements/experience: 5+ years of software engineering experience. Proven backend experience with C# (.NET Core) in Linux-based production environments. Comfortable navigating ambiguity and working with minimal supervision. Strong SQL knowledge, with experience using PostgreSQL in live systems. REST API development experience; understanding More ❯

Have you ever wanted to work in one of the top Alternative Investment funds in the world? Or maybe you already do, but want a change of scenery and less red tape. If so, this is for you. They are More ❯

Lead Software Engineer Tech Stack: C#, .NET, SQL, Azure, Docker, Bloomberg, Fidessa London - Onsite Salary Range: £80,000 - £135,000 Harrington Starr has partnered with a boutique Investment Bank, with decades of experience and exceptional performance. They are currently seeking to hire a Senior/Lead Engineer possessing strong experience developing front office applications and systems, integrating with 3rd party … of the front office, with daily interaction with Traders and a host of stakeholders across all levels of the business. Responsibilities: Design and develop new front office application utilising C#, .NET Working on internal systems to maintain quality and standards Integration of real-time and historical data with 3rd party APIs - Bloomberg, FactSet and Fidessa Utilising historical data for analytics … domain knowledge Exceptional bonus and benefits (health and dental care, life insurance) Working flexibility Key Requirements: BSc Computer Science or related Mathematical degree Excellent knowledge and experience developing with C#, .NET Strong experience with 3rd party APIs Good experience developing front office systems, interacting with various stakeholders Excellent communication Un-restricted right to work in the UK If you would More ❯

projects to life. What you’ll do: Architect and build backend systems for multiplayer online games — authentication, matchmaking, lobbies, orchestration, and more Develop high-performance backend services using C++, C#, Go, or Node.js Collaborate across gameplay and network engineering to deliver smooth, low-latency experiences Optimise backend systems for scalability, cost-efficiency, and reliability Build and maintain APIs, microservices, and … Ensure clean documentation and support accurate planning with time estimates and reporting What you’ll need: 5+ years' backend development experience (games industry preferred) Strong coding skills in C++, C#, Go, or Node.js (C C# ideal) Deep understanding of distributed systems, real-time networking (WebSockets, RPCs, REST, gRPC) Experience with cloud platforms (AWS, Azure, or GCP) Familiarity with matchmaking, player … Engineer vacancy is being handled by Langham Recruitment Ltd. Langham Recruitment Ltd acts as an employment agency and is registered in England and Wales (reg 11525223). Keywords: C++, C#, Go, Node.js, WebSockets, RPCs, REST, gRPC, AWS, Azure, GCP, PostgreSQL, Redis, MongoDB, PlayFab, AccelByte, Nakama More ❯

Analyst Developer C# SQL Server T-SQL Kafka React.js Financial Technology Projects 6-monthly rolling contract 500 - 550 p/d outside IR35 Central London (Tower Hill tube) 4 days in the office/1 day from home We are seeking a C# Analyst Developer to join a dynamic IT team on a contract basis. This role focuses on maintaining … to free up established team members to work on new dev, you will be working on a variety of apps. This is a 6 monthly rolling assignment. Key Skills: C# .net Visual Studio SQL Server T-SQL Kafka React.js Front-office/back-office trading applications: Fidessa, TT, CQG. GMI, ETDs, CFDs, fixed income, FX, trade lifecycle Regulatory reporting (MiFIR More ❯

Analyst Developer C# SQL Server T-SQL Kafka React.js Financial Technology Projects 6-monthly rolling contract £500 - £550 p/d outside IR35 Central London (Tower Hill tube) 4 days in the office/1 day from home We are seeking a C# Analyst Developer to join a dynamic IT team on a contract basis. This role focuses on maintaining … to free up established team members to work on new dev, you will be working on a variety of apps. This is a 6 monthly rolling assignment. Key Skills: C# .net Visual Studio SQL Server T-SQL Kafka React.js Front-office/back-office trading applications: Fidessa, TT, CQG. GMI, ETDs, CFDs, fixed income, FX, trade lifecycle Regulatory reporting (MiFIR More ❯

Lead SDET - £90,000 to £100,000 - London (Hybrid 2 days in the office) - C# experience Please note: This role does not offer sponsorship. Candidates must have the right to work in the UK and be able to commute to London as required. La Fosse has partnered with a London based financial services client to find a skilled SDET to … engineering. This is a unique opportunity to take ownership of automation initiatives, influence best practices, and drive innovation across the engineering function. ✅ Required Experience: Strong test automation expertise with C# Hands-on experience in testing RESTful web services Experience working with cloud platforms, particularly AWS Solid understanding of CI/CD pipelines and related tooling Mobile application experience (automated testing More ❯

quality results. Technical Expertise - Strong educational background in software development with a minimum of 5 years of professional experience. Proficient in .NET and .NET Core, with advanced knowledge of C# and object-oriented programming. Hands on experience in microservices architecture and web APIs, including message brokers, in-memory caches, and databases. Software Design & Development - Ability to design software with key … considerations such as scalability, performance, maintainability, reliability, reusability, security, and usability. Expertise in C# development, ensuring code is maintainable, efficient, reliable, and robust, with clear interfaces and proper exception handling. Software Testing & CI/CD - Experienced in unit testing, including the use of mocking frameworks to achieve required code coverage. Solid understanding of Git, software versioning, and modern CI/… with a pragmatic approach—focused on achieving results and getting things done. Proactive in identifying and addressing challenges, demonstrating a hands-on approach to problem-solving. Technical Stack Proficiency - C#, .NET 8/9 Redis, Kafka, MySQL RESTful APIs, SignalR Docker, Kubernetes More ❯

gradually move the company across to a more automated environment. What You’ll Be Doing: 🔹 Design, develop, and execute automated & manual tests for AI and non-AI systems using C# 🔹 Perform end-to-end, API, UI/UX, performance, security, and regression testing. 🔹 Contribute to software quality improvements & code reviews 🔹 Continuously improve testing processes, implementing new tools & automation techniques 🔹 Work …/LLM model testing, ensuring accuracy and performance What We’re Looking For: 3+ years’ experience in manual & automation testing for desktop and/or web applications Proficiency in C# or Python to develop and maintain automated test suites Experience with Desktop Applications (Windows) Experience in software QA methodologies, and API testing specifically Familiarity with Azure, AWS, and cloud-based More ❯

London on a hybrid basis, 3 days per week. You will be responsible for the development and support of Business applications using Opentext MBPM (Metastorm), MS .Net platform with C#, JavaScript and Oracle SQL Tasks include understanding business requirements, designing applications/workflows in Opentext MBPM (Metastorm), business data analysis, programming in Visual C#.NET using both Oracle and SQL Server More ❯

Engineer – HealthTech | London | Up to £110k + Equity Location: Central London (Hybrid, 3 days/week) Salary: £70,000–£110,000 (DOE) + Equity Tech Stack: Ruby, PHP, Python, C#, JavaScript Join a fast-growing HealthTech scaleup that’s already improved the lives of over 1 million patients through innovative fitness, tracking, and subscription-based solutions. Backed by strong investment More ❯

digital products. This person will act as the Tech Lead and Product Owner, providing technical leadership and doing planning and delivery, refining requirements, etc. Must haves: Strong experience in C#/.NET to developer backend systems and service development Strong experience in React and TypeScript to deliver performant, scalable frontend apps Strong testing experience – from unit tests to accessibility and More ❯