76 to 100 of 229 C# Jobs in the City of London

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 … external reporting/tradeflow and 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 clean, well-written, fully tested production More ❯

Senior C# Developer Key Technologies: C#, .NET, .NET Core, Azure, SQL London Perm Role | Hybrid Working £80,000 - £110,000 Harrington Starr has partnered with a global Investment Bank who are looking to hire a seasoned C# Developer with extensive experience developing Front Office - Fixed Income trading systems. Key Responsibilities: Design, develop and maintain Front Office systems written in C# More ❯

Software Engineering Manager – Insurance, C#/Azure Location: London EC3 (Hybrid – 3 days per week in-office) Type: Permanent/Full-time We are partnering with our client – a leading specialist insurer – for an Engineering Manager with London Market experience to lead the development and delivery of business-critical systems and solutions using Microsoft (C#/Azure) stack. The successful … and hands-on technical oversight across multiple platforms, projects, and stakeholders. You will not be expected to write code day-to-day but will need to be comfortable reviewing C# code Key Responsibilities Own the strategic vision and roadmap for all products in your domain Lead the software engineering lifecycle from planning through to delivery and support Ensure solutions align … and business systems analysis Oversee budgets, resource planning, vendor relationships, and delivery KPIs Support continuous improvement, Agile practices, and adoption of modern technologies Key skills 10–15 years in C# software engineering, architecture, and delivery leadership Strong background in Agile and hybrid delivery models Excellent understanding of modern software development practices and tools Experience in London Market insurance or reinsurance More ❯

.NET Software Engineer - C#, .NET, Azure cloud services - (Mid & Snr) £60k-£100k A unique opportunity to help shape the future of cross-border financial infrastructure. Summary A pioneering technology firm is expanding as it prepares to launch an innovative, cloud-native platform focused on global liquidity movement. As part of this growth, the company is seeking experienced Software Engineers to … lifecycle—from design through deployment and monitoring—is essential. Senior Engineers will also be expected to provide mentorship and technical leadership within their teams. Key Requirements: Professional experience with C# (.NET) Expertise in recent C# and .NET versions (e.g. C# v9.0+ and .NET 6.0+, ideally v10.0/.NET 8.0) Proficiency in Azure cloud services (e.g. Azure SQL, Cosmos DB, Functions … is suited to individuals seeking a challenging, high-impact engineering position at the intersection of fintech and infrastructure, where secure, scalable, and performant software is critical. .NET Software Engineer - C#, .NET, Azure cloud services - (Mid & Snr) £60k-£100k More ❯

Full Stack Developer | C# .NET 6, Vue/React, MVC | GeoSpatial Tech with Real-World Impact This is a full stack developer position focused on building and enhancing web applications for a high-performance GIS platform. You’ll work on everything from client-side UIs to server-side architecture, playing a key role in modernising tools that deliver interactive map … customer implementations. Expect a mix of interface design, server-side logic and architecture, with the chance to influence application design patterns and best practices across the stack. The Tech: C# development in a modern .NET 6 MVC environment Data Access Technologies JavaScript, HTML, CSS for core UI builds Vue or React (virtual DOM libraries) for interactive front ends Tooling with … health cover Gym membership + cycle-to-work scheme *Remote first company – you must be commutable to the office based in Stevenage to attend if needed Full Stack Developer | C# .NET 6, Vue/React, MVC | GeoSpatial Tech with Real-World Impact More ❯

Software Engineer – C#/Python/Kubernetes – Trading Infrastructure 12-Month Contract | Inside IR35 | £900/day (Please note: Sponsorship is not available for this role) A top-performing global hedge fund is seeking an experienced Software Engineer for a 12-month contract to help enhance and scale its mission-critical trading infrastructure. This is a high-impact opportunity to … suited for engineers who excel in complex, fast-paced environments where clean design and system resilience are essential. Key Responsibilities Design and implement backend services and RESTful APIs using C# (.NET Core/.NET 6+) and Python . Containerize and orchestrate applications using Kubernetes across hybrid cloud/on-prem environments. Build highly available, scalable, and observable systems designed for … in collaboration with quants and traders. Automate CI/CD pipelines and implement rigorous testing to support rapid, reliable deployments. What We’re Looking For Solid engineering experience with C#/.NET and/or Python in production environments. Proficiency preferred with Kubernetes and containerization tools (Docker, Helm, Operators, etc.). Strong grasp of distributed systems, microservices, and service-oriented More ❯

bureaucracy. Now I am looking for talented Mid to Senior Full-Stack Developers to help shape the future of the platform. What you’ll do: Build greenfield tools using C#/.NET/SQL Server/ASP.NET Design, develop, and own full-stack solutions Collaborate with smart, friendly teammates Influence tech decisions from day one What you bring: Strong recent … experience with C# and the .NET platform Database skills (SQL Server, Oracle, or similar) BSc in Computer Science or related subject Excellent communication and fluent English Eye for detail and quality code Nice to have: React or other JavaScript front-end frameworks Multi-threaded app development Network programming (TCP/UDP) Git, Mercurial, PlasticSCM, or similar Strong understanding of Windows More ❯

team. Up to £130K base salary + bonus Hybrid working - 3 days in London city office Skills & Experience: Proven experience as a technical lead with a strong background in C#, SQL, Oracle PL/SQL and front-end technologies. Proficiency with tools such as Jira, Octopus, and Artifactory (or similar), Docker, Kubernetes, Azure functions, App service plans, SQL server Experience More ❯

lifecycle, from design and development to deployment and operation in production. They're building this platform in modern .NET and Azure PaaS. 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 ❯

Shaped profile with experience in following languages and technologies like Java, J2EE, Springboot, React, Angular, CCS, CSS pre-processors and Node.js. Secondary Skills hands-on experience on Kotlin and C# will be an added advantage. CRM tool such as Salesforce knowledge will be an added advantage. Knowledge of modern DevOps CI/CD practices with relation to the Full Stack More ❯

Deliver documentation (DOIs, technical wikis), promote best practices, and reduce operational risk Propose innovative solutions, new business capabilities, and system improvements Experience: Proven background in software development using .NET (C#, .Net Core, WPF, Entity Framework) Front-end experience with Angular/AngularJS Strong database skills with SQL Server, Oracle, MongoDB Familiarity with market data tools: Bloomberg API, Reuters EIKON, RMDS More ❯

ll Bring: Recent graduate in a STEM discipline with a minimum of 1 year experience in software engineering. Knowledge of programming with experience in a structured language such as C#, C++, Java, Python or Golang. Knowledge of coding fundamentals e.g. modern software design principles, data structures & algorithms. Experience with databases, cloud, containerisation and testing is beneficial. Strong complex problem-solving More ❯

skills, able to simplify complex ideas. Proven ability to manage multiple projects and meet deadlines in dynamic environments. Proficiency with SQL Server in high-transaction settings. Experience with either C# or Python/PySpark for data tasks. Hands-on knowledge of Azure cloud services, such as Databricks, Event Hubs, and Function Apps. Solid understanding of DevOps principles and tools like More ❯

written form Managing stakeholders, including customers and end users Championing quality assurance and best practices Practical software development experience in the full technical stack, e.g. React, Typescript, Javascript, Java, C#, messaging, Elastic, MongoDB and traditional RDBMS such as PostgreSQL. Following an agile development methodology Driving innovation within a team of engineers to find new solutions to difficult problems It would More ❯

Bonus : Up to 15% Pension : Up to 10% Amazing Holiday Allowance : + bank holidays Birthday Off Private Healthcare Comprehensive Pension Plan 🌳 Tech Stack 🌳 Languages: Ruby-on-Rails, Java, Python, C#, VueJs, Typescript/Angular/React Cloud: Amazon Web Services (AWS) Databases: PostgreSQL, DynamoDB Additional Tools & Frameworks: GraphQL, REST APIs, Software Design Patterns – TDD, DDD, Agile methodologies: Scrum and Kanban More ❯

both front-end and back-end technologies , a solid understanding of Object-Oriented Design , and a passion for learning and embracing new tech. Languages : 🌳 Ruby-on-Rails, Java, Python, C# 🌳 VueJs, Typescript/Angular/React Cloud : 🌳 Amazon Web Services (AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban More ❯

have to have all the languages but just some and you will be taught the rest, Strong object orientated design is a must. Languages : 🌳 Ruby-on-Rails, Java, Python, C#, PHP 🌳 VueJs, Typescript/Angular/React Cloud : 🌳 Amazon Web Services (AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and More ❯

with the modern Software Development Life Cycle (SDLC). Core Technical Skills: You have hands-on experience with some combination of: At least one modern programming language (like Java, C#, Python, or JavaScript). Modern automation frameworks (such as Selenium, Appium, Cypress, Playwright, or TestNG). Development tools and IDEs (like Git, IntelliJ IDEA, or Visual Studio). Preferred Skills More ❯

development roles Minimum 5 years in Engineering Management and above roles London-based, with flexibility for travel . Strong technical background: Two or more popular web development programming languages (C#, JS/TS, Python, Java, Ruby, PHP) One or more cloud providers (AWS, Azure, GCP) Containerisation technologies Knowledge of microservices and event-driven architecture. CI/CD, pipelines development, Infrastructure More ❯

Senior C# Developer - Systematic Trading Firm | Up to £140K Base A high-growth systematic trading firm are searching for an experienced C# Developer to join their Data Applications team. This team sits at the heart of the business giving you exposure to many exciting areas. There is currently an abundance of ongoing and upcoming projects available, much of which is … cross team interactions, flat structure with access to the founder and C level individuals Free daily lunch and snacks Requirements: 10+ years of software engineering experience Strong proficiency in C# Track record of delivering scalable, greenfield products Relational database experience - ideally Postgres API experience Ideally proficiency in React and/or Typescript Bachelor's degree - ideally in computer science or More ❯

practices, we would love to 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 Pipelines Having worked with at least More ❯

your skills and gain valuable experience, by joining us to support our clients transition to a sustainable future. Role Summary We’re looking for a talented mid-level C C# developer to join our Cross Product Platform Software Development team. Responsibilities Design and develop scalable solutions for pricing, risk management, trade booking, straight-through processing (STP), payments, settlements, and regulatory … users, stakeholders, and cross-functional teams to deliver high-quality solutions following Agile and SCRUM best practices. Candidate Skills and Requirements Strong hands-on experience in either C++ or C# (proficiency in both is a plus); familiarity with Python is advantageous. Proven ability to deliver results within agreed timelines, leveraging Agile and SCRUM methodologies. Prior experience in financial technology, particularly More ❯

Senior Software Engineer Key Technologies: C#, .NET, React, AWS, Docker, Kubernetes City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing team! This role provides the perfect opportunity to launch your career in a … Pension scheme. Hybrid working in Central London. Excellent salary base of up to £100,000 based on experience. Key skills, experience and qualifications required: Excellent knowledge and experience with C#, .NET and React.. Experience with cloud technology – specifically AWS. Knowledge of TDD/BDD. Excellent communication skills. Unrestricted right to work in the UK. This role offers hybrid working, with … an office location based in the City of London. This role will suit a Senior Software Engineer, with expert C#, .NET experience and commercial use of React having a direct impact from the get-go. Apply below and if you have any questions, please contact me via LinkedIn or email – ollie.bluck@harringtonstarr.com. More ❯

Senior C# Engineer C# Software Developer City of London, On-site Perm Role: £90,000 - £120,000 Harrington Starr has partnered with an innovative proprietary trading firm headquartered in the City of London. They are seeking to hire a Senior Software Engineer with extensive experience across the Microsoft technology stack. What you will get: A chance to work on the … your family. Various perks and in office benefits. Up to £120,000 basic salary depending on experience. Market leading bonus structure. What you will need: A strong background with C# development. Strong commercial experience with .NET Core. A strong understanding of SQL Server. 2:1 or above in Computer Science or related subject. Experience working on reporting and data analysis More ❯

Title: Senior Full Stack C#/Angular Developer 💰 Salary: £80-£100k 📍 Location: 3 days a week in the London office (Tuesday to Thursday) [Unfortunately, sponsorship is not available for this role at the moment] 🌿 Join a forward-thinking investment firm driving innovation and impact 🌿 💡 Your Role: You’ll be a key part of a collaborative development team, working on a … software solutions that drive growth. 💡 Key Responsibilities: Develop and maintain SPA (Single Page Applications) using Angular, HTML, CSS, and TypeScript. Build and enhance web services and RESTful APIs using C# and ASP.NET. Support the migration and modernisation of legacy applications. Collaborate with stakeholders across different departments to define and implement new functionality. Work with SQL databases, optimising performance and writing … you don’t meet all the requirements below, reach out anyway!) 💡 Required Skills: 10+ years’ commercial dev experience Angular – Experience developing SPA applications with Angular, HTML, CSS, and TypeScript. C#/.NET – Strong proficiency in C#, .NET, Linq, and ASP.NET for web services. Database – Solid SQL experience, including designing tables/views and writing stored procedures. Version Control – Experience with More ❯