876 to 900 of 983 C# Jobs in the South East

small, high-performing development team Drive the end-to-end design and build of SaaS products, from initial architecture to delivery Remain technically involved and hands-on, particularly in C#, .NET, and Azure Implement engineering best practices: Agile/Scrum, CI/CD pipelines, and code quality standards Collaborate cross-functionally with product and business stakeholders to translate requirements into … as both a technical leader and mentor, fostering a culture of innovation and accountability About You Proven experience building SaaS products from the ground up Strong technical background in C#, .NET, and Azure Experience managing and mentoring small development teams while remaining technically hands-on Solid understanding of modern software development practices, cloud architecture, and Agile delivery Excellent communication skills More ❯

small, high-performing development team Drive the end-to-end design and build of SaaS products, from initial architecture to delivery Remain technically involved and hands-on, particularly in C#, .NET, and Azure Implement engineering best practices: Agile/Scrum, CI/CD pipelines, and code quality standards Collaborate cross-functionally with product and business stakeholders to translate requirements into … as both a technical leader and mentor, fostering a culture of innovation and accountability About You Proven experience building SaaS products from the ground up Strong technical background in C#, .NET, and Azure Experience managing and mentoring small development teams while remaining technically hands-on Solid understanding of modern software development practices, cloud architecture, and Agile delivery Excellent communication skills More ❯

small, high-performing development team Drive the end-to-end design and build of SaaS products, from initial architecture to delivery Remain technically involved and hands-on, particularly in C#, .NET, and Azure Implement engineering best practices: Agile/Scrum, CI/CD pipelines, and code quality standards Collaborate cross-functionally with product and business stakeholders to translate requirements into … as both a technical leader and mentor, fostering a culture of innovation and accountability About You Proven experience building SaaS products from the ground up Strong technical background in C#, .NET, and Azure Experience managing and mentoring small development teams while remaining technically hands-on Solid understanding of modern software development practices, cloud architecture, and Agile delivery Excellent communication skills More ❯

small, high-performing development team Drive the end-to-end design and build of SaaS products, from initial architecture to delivery Remain technically involved and hands-on, particularly in C#, .NET, and Azure Implement engineering best practices: Agile/Scrum, CI/CD pipelines, and code quality standards Collaborate cross-functionally with product and business stakeholders to translate requirements into … cloud-based systems Act as both a technical leader and mentor, fostering a culture of innovation and accountability About You Proven experience building SaaS products Strong technical background in C#, .NET, and Azure Experience managing and mentoring small development teams while remaining technically hands-on Solid understanding of modern software development practices, cloud architecture, and Agile delivery Excellent communication skills More ❯

small, high-performing development team Drive the end-to-end design and build of SaaS products, from initial architecture to delivery Remain technically involved and hands-on, particularly in C#, .NET, and Azure Implement engineering best practices: Agile/Scrum, CI/CD pipelines, and code quality standards Collaborate cross-functionally with product and business stakeholders to translate requirements into … cloud-based systems Act as both a technical leader and mentor, fostering a culture of innovation and accountability About You Proven experience building SaaS products Strong technical background in C#, .NET, and Azure Experience managing and mentoring small development teams while remaining technically hands-on Solid understanding of modern software development practices, cloud architecture, and Agile delivery Excellent communication skills 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 ❯

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 ❯

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 ❯

Our digital apprenticeship programs are 2 years long. During this time, you’ll work on different projects alongside learning day to day operations, to become a rounded professional. Role We’ve embarked on an ambitious plan to modernise and transform More ❯

Data Engineer - C#/SQL/Azure DevOps/Kubernetes/Docker/Clickhouse. Data consumption, Data discovery, fast retrieval. £700/Day Inside IR35. 6 month rolling. Hybrid London. My client is a top tier commodities trading house. They are building a repository of gas data for analysts. It’s all about data, data consumption, data discovery, fast retrieval. More ❯

Data Engineer - C#/SQL/Azure DevOps/Kubernetes/Docker/Clickhouse. Data consumption, Data discovery, fast retrieval. £700/Day Inside IR35. 6 month rolling. Hybrid London. My client is a top tier commodities trading house. They are building a repository of gas data for analysts. It’s all about data, data consumption, data discovery, fast retrieval. More ❯

IMPORTANT: ONLY APPLY IF YOU HAVE EXPERIENCE WITH TRADING PLATFORM SUCH AS ORCHESTRADE, MUREX, CALYPSO, CHARLES RIVER, OR SIMILAR TRADING SYSTEMS. The Role We're seeking an experienced Senior C# Developer to architect and build enterprise-grade trading and risk management systems. You'll design robust middle-tier solutions for high-frequency trading environments, working directly with traders, portfolio managers … and quants to understand complex financial products and translate requirements into scalable systems. Technical Skills: • 7+ years of professional C# and .NET development experience • Deep expertise in distributed systems and messaging architectures (Kafka, RabbitMQ, TIBCO, or equivalent) • Solid understanding of architectural patterns: microservices, event sourcing, domain-driven design • Proficiency with SQL and NoSQL databases in high-volume environments • Strong async More ❯

IMPORTANT: ONLY APPLY IF YOU HAVE EXPERIENCE WITH TRADING PLATFORM SUCH AS ORCHESTRADE, MUREX, CALYPSO, CHARLES RIVER, OR SIMILAR TRADING SYSTEMS. The Role We're seeking an experienced Senior C# Developer to architect and build enterprise-grade trading and risk management systems. You'll design robust middle-tier solutions for high-frequency trading environments, working directly with traders, portfolio managers … and quants to understand complex financial products and translate requirements into scalable systems. Technical Skills: • 7+ years of professional C# and .NET development experience • Deep expertise in distributed systems and messaging architectures (Kafka, RabbitMQ, TIBCO, or equivalent) • Solid understanding of architectural patterns: microservices, event sourcing, domain-driven design • Proficiency with SQL and NoSQL databases in high-volume environments • Strong async More ❯

IMPORTANT: ONLY APPLY IF YOU HAVE EXPERIENCE WITH TRADING PLATFORM SUCH AS ORCHESTRADE, MUREX, CALYPSO, CHARLES RIVER, OR SIMILAR TRADING SYSTEMS. The Role We're seeking an experienced Senior C# Developer to architect and build enterprise-grade trading and risk management systems. You'll design robust middle-tier solutions for high-frequency trading environments, working directly with traders, portfolio managers … and quants to understand complex financial products and translate requirements into scalable systems. Technical Skills: • 7+ years of professional C# and .NET development experience • Deep expertise in distributed systems and messaging architectures (Kafka, RabbitMQ, TIBCO, or equivalent) • Solid understanding of architectural patterns: microservices, event sourcing, domain-driven design • Proficiency with SQL and NoSQL databases in high-volume environments • Strong async More ❯

play a key role in refactoring existing SQL pipelines, enhancing data models, and implementing best practices for high-volume, low-latency data operations. This system will be built in C# .NET, but the real focus of the role is on experience with non-relational databases - ideally clickhouse. They accept alternative experience with C#, Python or similar languages. If not C# … Python is preffered. The ideal candidate will bring strong hands-on ClickHouse experience , and some experience in either C#/.NET/Python. 💷 Day rate: Up to £800/day Inside IR35 📈 Contract: 6 months rolling (long-term migration programme) 📍 Location: Hybrid – 2–3 days office, London 💻 NO ENERGY TRADING EXPERIENCE REQURED - great opportunity for someone to get into the … platforms. Establish data quality controls, monitoring, and performance tuning best practices. Support the ongoing evolution of the data architecture and tooling ecosystem. Experience Required: 5+ years’ experience as a C# Engineer or ClickHouse Developer in trading or financial services. Expert-level SQL development and optimisation skills. Hands-on experience with ClickHouse (architecture, performance tuning, schema design). Experience with data More ❯

play a key role in refactoring existing SQL pipelines, enhancing data models, and implementing best practices for high-volume, low-latency data operations. This system will be built in C# .NET, but the real focus of the role is on experience with non-relational databases - ideally clickhouse. They accept alternative experience with C#, Python or similar languages. If not C# … Python is preffered. The ideal candidate will bring strong hands-on ClickHouse experience , and some experience in either C#/.NET/Python. 💷 Day rate: Up to £800/day Inside IR35 📈 Contract: 6 months rolling (long-term migration programme) 📍 Location: Hybrid – 2–3 days office, London 💻 NO ENERGY TRADING EXPERIENCE REQURED - great opportunity for someone to get into the … platforms. Establish data quality controls, monitoring, and performance tuning best practices. Support the ongoing evolution of the data architecture and tooling ecosystem. Experience Required: 5+ years’ experience as a C# Engineer or ClickHouse Developer in trading or financial services. Expert-level SQL development and optimisation skills. Hands-on experience with ClickHouse (architecture, performance tuning, schema design). Experience with data More ❯

play a key role in refactoring existing SQL pipelines, enhancing data models, and implementing best practices for high-volume, low-latency data operations. This system will be built in C# .NET, but the real focus of the role is on experience with non-relational databases - ideally clickhouse. They accept alternative experience with C#, Python or similar languages. If not C# … Python is preffered. The ideal candidate will bring strong hands-on ClickHouse experience , and some experience in either C#/.NET/Python. 💷 Day rate: Up to £800/day Inside IR35 📈 Contract: 6 months rolling (long-term migration programme) 📍 Location: Hybrid – 2–3 days office, London 💻 NO ENERGY TRADING EXPERIENCE REQURED - great opportunity for someone to get into the … platforms. Establish data quality controls, monitoring, and performance tuning best practices. Support the ongoing evolution of the data architecture and tooling ecosystem. Experience Required: 5+ years’ experience as a C# Engineer or ClickHouse Developer in trading or financial services. Expert-level SQL development and optimisation skills. Hands-on experience with ClickHouse (architecture, performance tuning, schema design). Experience with data 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 ❯

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 ❯

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 ❯

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 ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance and data flow … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM exposure … OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid model More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance and data flow … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM exposure … OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid model More ❯

C# Developer | Energy Trading | ETRM | OpenLink Endur | Hybrid (London) | £800/Day Inside IR35 | 6-Month Rolling Contract We’re working with a major energy and commodities trading house undergoing a large-scale technical transformation across their Power & Gas trading desks . As trade volumes increase, the business is investing heavily in system integration to enhance performance and data flow … a high-impact integration project , focused on improving how data moves from Olympus ETRM into OpenLink Endur , ultimately boosting trading capabilities. 🧩 The Role We're looking for three experienced C# Developers with strong back-end skills and a background in Energy or Commodities Trading . This project demands hands-on experience in trading systems, ideally with ETRM/CTRM exposure … OpenLink Endur or Orchestrade 🧠 What You’ll Bring Solid C# back-end development experience Experience with ASP.NET Background in Energy Trading or Commodities Hands-on experience with ETRM/CTRM platforms - OpenLink Endur or Orchestrade Bonus: Previous experience on integration projects involving Olympus and/or OpenLink Endur 💼 Contract Details 3 days/week onsite in London (hybrid model More ❯

Data Developer – Hybrid - £800/day Inside IR35 | C# | ClickHouse | SingleStore | Rockset | TimescaleDB | 6-Month Rolling | I’m working with a commodities trading firm that’s embarking on a greenfield rebuild of their data-intensive trading platform, moving from traditional SQL infrastructure to a next-generation analytical stack built in .NET and ClickHouse. They’re looking for a Data Developer …/Engineer with a strong C# background and solid experience working with analytical databases and modern data lake technologies. The Details £800/day Inside IR35 6-month rolling contract Hybrid, 2 days onsite in London Key Focus Areas Strong experience with .NET/C# (backend-focused) Hands-on with analytical databases such as ClickHouse, SingleStore, Rockset, or TimescaleDB Experience … e.g. Apache Iceberg, Delta Tables, Apache Spark, column stores) Comfortable working with large-scale data ingestion and processing (batch or streaming) Data Developer – Hybrid - £800/day Inside IR35 | C# | ClickHouse | SingleStore | Rockset | TimescaleDB | 6-Month Rolling More ❯