201 to 225 of 229 C# Jobs in the Thames Valley

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 ❯

Senior Cloud Software Development Engineer in Test (SDET) Ciphr has an exciting opportunity for a Senior Cloud Software Development Engineer in Test (SDET) to join the team as we grow and develop. Youll be responsible for leading testing of the More ❯

Senior Cloud Software Development Engineer in Test (SDET) Ciphr has an exciting opportunity for a Senior Cloud Software Development Engineer in Test (SDET) to join the team as we grow and develop. You’ll be responsible for leading testing of 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 ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … team transitions from Selenium. This is a hybrid role, primarily remote with scheduled monthly in-office collaboration days. Key Responsibilities: Enhance and maintain an evolving test automation framework using C# and Playwright Write clear, maintainable test scripts using Gherkin syntax and ReqNRoll Collaborate in Agile ceremonies, providing early feedback on testability and quality concerns Expand and maintain regression and feature … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend More ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … team transitions from Selenium. This is a hybrid role, primarily remote with scheduled monthly in-office collaboration days. Key Responsibilities: Enhance and maintain an evolving test automation framework using C# and Playwright Write clear, maintainable test scripts using Gherkin syntax and ReqNRoll Collaborate in Agile ceremonies, providing early feedback on testability and quality concerns Expand and maintain regression and feature … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend More ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … team transitions from Selenium. This is a hybrid role, primarily remote with scheduled monthly in-office collaboration days. Key Responsibilities: Enhance and maintain an evolving test automation framework using C# and Playwright Write clear, maintainable test scripts using Gherkin syntax and ReqNRoll Collaborate in Agile ceremonies, providing early feedback on testability and quality concerns Expand and maintain regression and feature … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend More ❯

Are you an experienced Senior C# ASP .Net Developer looking for a new challenge to enhance your development skills? Our clients are a leading web development agency seeking a Senior .Net Developer to deliver technically excellent web solutions for high profile brands. About the role Working within a team of designers, front-end developers and .Net developers, you will have … others within the development team Preparing functional and technical specification documents Scoping projects, requirements capture and delivering time estimates Essential skills and experience Commercial ASP.NET web application development using C#, MVC and SQL Server with a specific focus on e-commerce and CMS platforms Experience working as technical lead on commercially focused web development projects, and demonstrate an ability to More ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend More ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend More ❯

Excellent opportunity for a QA Engineer with strong hands-on experience in C#, Visual Studio. If you enjoy working across both frontend and backend systems, are passionate about automation then this could be the ideal role for you. About the Role In this position, you'll be a key contributor to the quality assurance efforts of a cutting-edge Microsoft … backend/API testing and assist with security testing initiatives Skills and experience required: 2+ years of experience in software testing with a focus on test automation Proficiency in C# and automation tools like Selenium or Playwright Experience working within Agile/Kanban teams and a strong understanding of shift-left testing principles Strong knowledge of API testing and backend 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 (2 days per week in the office) Are you a QA More ❯

Position: QA (Appium)/Technical Account Manager (TAM) - Enterprise clients Salary: £80k per annum + bonus Industry: Global software leader in DevOps, Testing, AI & Data Management Location: Bracknell Hybrid (2 days per week in the office) Are you a Senior 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 ❯

Position: QA (Appium)/Technical Account Manager (TAM) - Enterprise clients Salary: £80k per annum + bonus Industry: Global software leader in DevOps, Testing, AI & Data Management Location: Bracknell Hybrid (2 days per week in the office) Are you a Senior 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 (2 days 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 ❯