101 to 125 of 125 C# Jobs in Slough

build strong and effective relationships Have experience building and maintaining complex distributed systems Take a proactive approach to spotting problems and areas for improvement Skills & Experience Strong Knowledge of C# and SQL Experience building on Azure, GCP or AWS At least 5 years of experience building distributed systems Excellent communication skills Can inspire and lead a team Experience overseeing multiple … concurrent projects Tech Stack C# .NET Kafka Real time distributed systems High throughput Git Elastic stack If you are not an expert in these specific technologies but are familiar with an equivalent then we’re happy to train you. More ❯

intelligence platform - spanning OBD diagnostics, API-based vehicle integrations, and real-time energy data streams. The Role We’re looking for a skilled Backend Developer with strong experience in C# and the .NET ecosystem to help us scale and evolve our core data and API infrastructure. You’ll play a central role in designing, building, and optimising services that power … scalability, and data integrity. Help evolve our internal tools and services to support ClearWatt’s growing product suite. What We’re Looking For 2+ years of professional experience with C# and .NET Core . Experience building REST APIs or microservices at scale. Familiarity with cloud-native design and Azure services . Understanding of async programming, dependency injection, and distributed systems. More ❯

Senior C# Engineer | Renewable Energy Trading | £600-700 OUTside IR35 | 6 Months rolling | Hybrid (London) A Senior C# Engineer is required for a Renewable Energy Trading company that’s leading the charge in sustainable energy production, optimisation, and trading technology. With the UK committing over £24Bn to Renewable Energy , this is an opportunity to play a key part in the … the boundaries of technology to accelerate the shift to clean energy. 💰 £600–700 per day | OUTside IR35 📑 6-month rolling contract 📍 Hybrid – 2-3 days per week, London ⚡ Senior C# Engineer - Energy Trading experience required As a Senior C# Engineer , you’ll be working on the design and build of real-time trading and analytics platforms , leveraging microservices architecture and … ll collaborate closely with traders, data engineers, and DevOps specialists to deliver event-driven solutions that power trading decisions and optimise market operations. Experience required: Strong commercial experience with C# and .NET Core Proven experience building microservices-based architectures Strong knowledge of Azure Cloud Services (Functions, Service Bus, Event Hub, Kubernetes, etc.) Experience with event-driven/message-based systems More ❯

V19-V23 preferred), as well as API design and development fundamentals and with API testing using tools such as Swagger Good SQL/Sybase skills; building modern applications with C# Strong hands-on development experience with: AVS, OpenJVS, Open Components, Java, SQL, C#, Python Connex Gateways for trade booking and market data integration Real-Time Position Engine (RTPE) and Automated More ❯

Our Investment Banking client is looking for a highly skilled C# Fullstack Developer to join their London team in a permanent capacity. Skills required: Key Responsibilities: Collaborate with middle and back office teams to understand requirements and deliver robust technical solutions. Develop and maintain fullstack applications using modern technologies. Contribute to DevOps processes and CI/CD pipelines. Work with … large data models and multithreaded systems. Essential Skills: Strong proficiency in C# and backend development. Frontend experience with Angular and AG Grid . Solid understanding of SQL Server and database design. Familiarity with Jenkins or other DevOps tools. Ability to build strong relationships with stakeholders and communicate technical concepts clearly. Desirable: Experience in PnL systems , multithreading , or large data models 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 £120,000 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 ❯

systems communicate, scale, and deliver value across the business. The Role You’ll be responsible for designing and developing high-performance integrations that connect core systems and partners, using C#, Python, and Azure cloud technologies . This is a hands-on engineering role that also offers the opportunity to influence architecture, best practices, and technology direction. What You’ll Be … Doing Designing, building, and maintaining high-throughput, reliable integration components using C# and Python Developing and optimising SQL interactions that underpin APIs and message-driven workflows Implementing asynchronous messaging via Azure Service Bus (or similar) to decouple systems and ensure scalability and resilience Building workflow automations with Azure Logic Apps to orchestrate processes and connect enterprise systems Managing API exposure … long-term maintainability Championing best practices around API versioning, secure messaging, error handling, monitoring, and CI/CD automation What We’re Looking For Strong hands-on experience with C# and Python in production settings Proven proficiency in SQL – from database design to performance tuning Practical experience with Azure Service Bus (queues, topics) or comparable enterprise messaging technologies Experience using More ❯

to continuous improvement WHAT YOU’LL BRING Strong experience with Service Fabric and Kubernetes Proven experience architecting and scaling B2B SaaS platforms Strong full-stack technical expertise – especially across C#, JavaScript, and React Experience integrating with APIs and identity platforms (e.g. Microsoft Entra ID/Azure AD) Solid understanding of cloud infrastructure – ideally Azure and Service Fabric A collaborative mindset … and client delivery A pragmatic, hands-on approach to problem-solving and decision-making Background in IAM or SSO is a bonus OUR TECH STACK Frontend: React, JavaScript Backend: C#, .Net, Azure Service Fabric Infrastructure: Azure, Service Fabric, Cosmos DB WHY COCENTRIC Be a key part of a product that’s transforming how the frontline workforce connects Help shape the More ❯

Managers. Title: Test Automation Engineer - QA Company: Consultancy - Financial Location: London Hybrid (often 3 days a week in office) Salary: £50,000-£65,000 + benefits Tech essentials : Backend (C#/Java/Python) SQL, Specflow/BDD Nice to have: CI/CD pipes, GitHub Actions, YAML, Powershell Interview process: 1 stage remote video interview Why should you be … endless and they are active looking for future leaders Why they’ll be interested in you - You have solid Programming experience, with a keen interest in Software Quality & Testing C# or Python or Java knowledge needed You probably have a relevant degree at 2:1 level or above You may have 1-3 years commercial experience, but they're open More ❯

ensuring issues are resolved efficiently. Collaborate closely with the development team to rapidly identify, report, and fix bugs, improving product reliability and user satisfaction. Contribute to feature development using C#, Angular, and SQL, enhancing product performance and functionality. Leverage AI-powered tools to streamline support, automate repetitive tasks, and boost team efficiency. Create clear, reusable documentation for processes, common solutions … explain technical concepts to both technical and non-technical users. Comfortable working independently and as part of a collaborative team in a fast-paced environment. Hands-on experience with C#, Angular, and SQL, with a willingness to deepen expertise. Familiarity with version control systems (Git) and modern development practices. Desirable Skills & Experience Curiosity about or experience with AI-powered development More ❯

day brings a new challenge, a new skill to learn, and the chance to see your work make a real difference. What You’ll Be Doing Developing solutions in C# (and occasionally Dart and other languages) Designing user-friendly interfaces for technical operators and engineers Creating tools for real-time monitoring, control, and experimentation Collaborating closely with experts in hardware … excited by the crossover of software and hardware, and who thrives in a collaborative environment. You’ll fit well if you bring: 2+ years of professional development experience Strong C# skills (extra kudos if you’ve touched other languages) Experience working with Git or similar tools A problem-solving mindset and a methodical approach to debugging Good communication and a More ❯

Looking to excel your career in a start-up environment? C# Developer – VC-backed Cloud Security 💰 Salary up to £120k + equity 📍 London 5 days in office 🌎 Visa sponsorship available We have recently partnered with a rapidly growing VC-backed startup who develop technology to identify and minimize the effect of security incidents, with the aim of cutting response times … to minutes. Their solution is built for rapid deployment and ease of use, enabling organisations to handle threats far more effectively. They are now on the hunt for a C# Developer to work on the system that platform processes billions of events every week, powered by modern cloud infrastructure and innovative methods. 👀 Experience required as a C# Developer: Russell Group … university 1st Class Degree in Computer Science (or related – Maths, Physics, Engineering) 2-6 years experience in C# Strong computer science fundamentals End-to-end project experience (from design, to build, to deployment) 💡 What you’ll do: Write clean, scalable code in C# (also open to Python & Go engineers) Drive innovation using AWS and GCP Build and scale platform capabilities More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . With millions … and iterate. Contribute to a product used by developers and enterprises worldwide. What you’ll bring Mastery of vanilla JavaScript and TypeScript , with additional exposure to C++, Java, or C# . Strong knowledge of data structures, algorithms, and performance optimisation . Experience with frameworks like React, Angular, or Vue , and a deep understanding of DOM internals and rendering pipelines . More ❯

C++ Developer/Backend Software Engineer (Windows C/C++, C#) London to £70k FTC Are you a skilled C++ Developer? You could be progressing your career in a senior, hands-on role at a global market data provider whilst enjoying a range of perks and benefits. As a C++ Developer you will join an Agile team focussed on building … software systems that require real-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 in the City office three More ❯

eFX Algo IT team. The team develops the pricing, hedging and low latency order and price distribution team systems for the eFX desk. The team consists of Java and C# developers, developing server-side and UI components, respectively. This role is specifically a low-latency Java role, encompassing pricing work, hedging work, market connectivity work and associated services around that. … FATCA, EMIR, MiFID), Pricing & Valuation, Organizational Transformation & Process Improvement. IT & Information systems consulting: Business Analysis, Project Management, Change management, Front Office Support (functional and technical), Development (e.g C++, Python, C#, Java, VBA), Financial Software (e.g. Sophis, Murex, Summit, Calypso), IT Transformation & Innovation. As part of Quanteam Group, Quanteam UK & PL has today more than 80 consultants, working for major Capital More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

The Client My client is a market leading FinTech business that spun-out of one of the largest and most successful hedge funds in the world. Their offering is a suite of technology and investment management infrastructure services that they More ❯

Are you a software developer who enjoys working with financial markets and innovative technology? Spun out of one of the most successful hedge funds globally, you'll get the chance to work with likeminded people on an innovative project. You More ❯

your work on live trading decisions. High-Visibility Projects – Deliver technical solutions that are business-critical, fast-paced, and directly aligned with P&L outcomes. Tech Stack – Work across C#, SQL, and Excel/VBA with opportunities to introduce Python and modern data tools as the role evolves. Autonomy & Ownership – Shape your own solutions, from idea through to deployment, in … them into production. Your work will blend short-term delivery with longer-term technical improvements, always focused on speed, stability, and reusability. Expect to work across technologies such as C#, SQL, and Excel/VBA, with opportunities to incorporate Python and modern data frameworks as projects evolve. What You’ll Need Solid background in front-office or trading technology within … financial services Strong development experience across C#, Excel/VBA, and SQL Understanding of financial products, ideally spanning Fixed Income, Derivatives, or other cross-asset classes A hands-on approach and the confidence to collaborate directly with trading and risk teams The ability to balance fast-paced delivery with structured, maintainable development practices Curious to explore new tools and technologies More ❯

Position: QA Tester/Technical Account Manager (TAM) - Enterprise clients Salary: £73,000.00 + 4% bonus Industry: Global software leader in DevOps, Testing, AI & Data Management Location: Bracknell Hybrid (1 day per week in the office) Are you a QA More ❯

to minutes using intelligent, cloud-based security methods. You’ll be building the next generation of security infrastructure from the ground up and expanding platform capabilities - think high-performance C# systems, scalable cloud-native architecture, and detection tools designed for speed, precision and resilience. What You’ll Do Design and build distributed systems in C# for cloud-based threat detection. … is fine). A background in building performant, scalable platforms. Interest in security engineering and cloud infrastructure. A Computer Science (or related) degree from a strong academic background. 💻 Tech : C#, some Go & Python, AWS, GCP, Kubernetes (you can come from ANY backend programming language ⭐) Be part of a team redefining how companies respond to threats - apply now More ❯

a team of other Automation Infrastructure Engineers and Analysts Experienced in the following: Infrastructure Development and Automation: Building use cases and creating infrastructure applications using programming languages such as C#, C++, and Python to process data locally Containerization and Orchestration: Using tools like Docker and Kubernetes to package and manage applications for scalable and efficient deployment. Packaged Application and industry … Collaborate with cross-functional teams to ensure data quality and integrity. We are looking for experience in the following skills: Extensive experience with Network and Infrastructure Engineering Experience with C#, C++ and Python Infrastructure API implementation experience Experience with creating and managing Data Pipelines, Experience with Data Analytics Experience with Palantir Foundry & AIP or other equivalent tools Experience of SQL More ❯

defence along with major banks and many more. You'll be tasked with creating tooling for building and analysing software created in C/C++, GO, Rust, Java or C# and developing novel program analysis techniques for identifying using AI models. Requirements: Recent and relevant experience in Reverse engineering, Security research, malware analysis and Vulnerability research. Familiar with IDA Pro … or Ghidra or other reverse engineering tools Experienced with low level languages: C/C++, GO, Rust, Java, C# and Python. Strong use of scripting languages such as python, PowerShell or Bash. Independent and strong work ethic, understanding and solving new challenges. Can be in the London office 2-3 times a week If this sounds like you and you More ❯

support mentoring, upskilling, and knowledge-sharing across the team, contributing to the broader technical excellence of the consultancy. ESSENTIAL SKILLS: • Deep technical proficiency in SQL, Python, TypeScript, C++, and C# • Experience and awareness of Palantir technology • UK Sole Nationals with active DV clearance (current and valid) • Experience delivering solutions for government or secure clients TO BE CONSIDERED: Please either apply … us to process and submit (subject to required skills) your application to our client in conjunction with this vacancy only. KEY SKILLS: Consultant Engineer, Palantir, SQL, Python, TypeScript, C++, C#, DV Cleared, Data Modelling, Operational Workflows, AI/ML, Secure-by-Design, NSD More ❯

for someone who can drive projects, mentor junior and deal with senior business stakeholders. Technically they are looking for strong E2E test automation with a heavy focus on complex C# API automation testing. What's required Strong experience in C# backend testing Previous experience working in trading is strongly desirable Strong ability to communicate with non technical stakeholders What's More ❯