Senior C# / .NET Developer Risk & Securities Lending Location: London (Hybrid) Contract Duration: 6 Months Industry: Financial Services About the Opportunity Are you a seasoned C# engineer with a deep understanding of financial markets? We are seeking an experienced Senior C# / .NET Developer to join a high-performing technology team supporting critical Risk Management and Securities Lending platforms. In this 6-month hybrid contract, you will play a pivotal role in designing, building, and supporting high-performance systems used for complex risk calculations and trading/financing workflows. Working closely with quants, risk managers, and the Front Office, you will deliver scalable, robust solutions in a fast-paced, regulated environment. What You Will Do System Development: Design, build, and maintain high-performance C# / .NET applications supporting Risk and Securities Lending workflows. API Integration: Build and consume RESTful APIs to seamlessly connect complex upstream and downstream financial systems. Data & Throughput: Handle large datasets and high-throughput systems, contributing to vital exposure calculations, limits, and reporting. Best Practices: Write scalable, testable, and maintainable object-oriented code, participating in architectural discussions and code reviews. Cross-Functional Collaboration: Partner with Risk, Front Office, Operations, Compliance, and Product Owners to translate business needs into technical reality. Production Support: Assist with incident analysis, remediation, and the ongoing support of live systems. What We Are Looking For Core Technical Expertise: Deep, hands-on experience with C# and .NET (including .NET Core). Exceptional Object-Oriented Programming (OOP) skills and architectural design principles. Proven track record in designing and implementing REST/JSON APIs. Solid SQL database experience (e.g., SQL Server). Strong grasp of application performance, scalability, unit/integration testing, and CI/CD pipelines. Essential Domain Knowledge: A proven background working within Financial Services technology. Strong domain knowledge in at least one of the following: Risk Management, Securities Lending, Prime Brokerage, or Collateral/Margin/Financing platforms. Highly Beneficial / Nice-to-Have: Exposure to risk and regulatory methodologies (RWA, CCAR, Basel III / IV). Understanding of credit risk, counterparty exposure, or capital calculations. 10+ years of commercial software engineering experience. Experience with Cloud platforms (Azure/AWS) and messaging technologies (e.g., Kafka). Familiarity with front-to-back trading systems and Agile/Scrum delivery. About You You possess a strong analytical and problem-solving mindset. You are highly comfortable navigating complex, highly regulated enterprise environments. You can communicate complex technical concepts clearly to non-technical stakeholders. You are proactive, detail-oriented, and hyper-focused on reliable delivery. How to Apply If you have the technical depth and the financial domain expertise to hit the ground running, we want to hear from you. Apply now at Prasanna com with your updated CV to be considered for this immediate contract opportunity. Randstad Technologies is acting as an Employment Business in relation to this vacancy.
Aug 06, 2026
Contractor
Senior C# / .NET Developer Risk & Securities Lending Location: London (Hybrid) Contract Duration: 6 Months Industry: Financial Services About the Opportunity Are you a seasoned C# engineer with a deep understanding of financial markets? We are seeking an experienced Senior C# / .NET Developer to join a high-performing technology team supporting critical Risk Management and Securities Lending platforms. In this 6-month hybrid contract, you will play a pivotal role in designing, building, and supporting high-performance systems used for complex risk calculations and trading/financing workflows. Working closely with quants, risk managers, and the Front Office, you will deliver scalable, robust solutions in a fast-paced, regulated environment. What You Will Do System Development: Design, build, and maintain high-performance C# / .NET applications supporting Risk and Securities Lending workflows. API Integration: Build and consume RESTful APIs to seamlessly connect complex upstream and downstream financial systems. Data & Throughput: Handle large datasets and high-throughput systems, contributing to vital exposure calculations, limits, and reporting. Best Practices: Write scalable, testable, and maintainable object-oriented code, participating in architectural discussions and code reviews. Cross-Functional Collaboration: Partner with Risk, Front Office, Operations, Compliance, and Product Owners to translate business needs into technical reality. Production Support: Assist with incident analysis, remediation, and the ongoing support of live systems. What We Are Looking For Core Technical Expertise: Deep, hands-on experience with C# and .NET (including .NET Core). Exceptional Object-Oriented Programming (OOP) skills and architectural design principles. Proven track record in designing and implementing REST/JSON APIs. Solid SQL database experience (e.g., SQL Server). Strong grasp of application performance, scalability, unit/integration testing, and CI/CD pipelines. Essential Domain Knowledge: A proven background working within Financial Services technology. Strong domain knowledge in at least one of the following: Risk Management, Securities Lending, Prime Brokerage, or Collateral/Margin/Financing platforms. Highly Beneficial / Nice-to-Have: Exposure to risk and regulatory methodologies (RWA, CCAR, Basel III / IV). Understanding of credit risk, counterparty exposure, or capital calculations. 10+ years of commercial software engineering experience. Experience with Cloud platforms (Azure/AWS) and messaging technologies (e.g., Kafka). Familiarity with front-to-back trading systems and Agile/Scrum delivery. About You You possess a strong analytical and problem-solving mindset. You are highly comfortable navigating complex, highly regulated enterprise environments. You can communicate complex technical concepts clearly to non-technical stakeholders. You are proactive, detail-oriented, and hyper-focused on reliable delivery. How to Apply If you have the technical depth and the financial domain expertise to hit the ground running, we want to hear from you. Apply now at Prasanna com with your updated CV to be considered for this immediate contract opportunity. Randstad Technologies is acting as an Employment Business in relation to this vacancy.
Senior Software Engineer (TypeScript Full Stack) London / WFH to £100k Do you enjoy problem solving and working with a range of technologies including functional programming languages such as Elixir, using the right tool for the job? You could be progressing your career in a senior, hands-on Software Engineer role at a successful and profitable energy trading market data scale-up. What's in it for you: Competitive salary, to £100k + Significant Equity Hybrid working (3 days London office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership, working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture and design through to implementation. There's a range of technology in the stack, you'll have a 50/50 split between backend and frontend development using TypeScript, Elixir, Elm and AWS amongst others, learning and picking new things up on the job in a collaborative, tech driven environment where you can get stuff done and see the results of your work. Location / WFH: You'll join the team in London three days a week in a hybrid work from home model. About you: You are degree educated in Computer Science or similar STEM discipline, having achieved a 2.1 or above from a Russel Group / Oxbridge or top 100 global university You are an experienced software engineer with a strong knowledge of best practices and Computer Science fundamentals and experience of delivering complex, data centric software You have advanced analytical and problem solving skills You're comfortable taking ownership of projects and mentoring more junior team members You have strong TypeScript skills, combined with any backend programming language (e.g. Python, Java, C++, C#) You're happy to work with the following tech stack (you don't need experience with all): Elixir, Ember, Elm, Phoenix, LiveView, Python, PostgreSQL, AWS, Docker You have an analytical mindset and enjoy problem solving You have experience of working in start-ups / SMEs and have good business acumen Ideally you will have a good understanding of financial markets Apply now to find out more about this Senior Software Engineer (TypeScript Full Stack Elixir) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.
Oct 01, 2025
Full time
Senior Software Engineer (TypeScript Full Stack) London / WFH to £100k Do you enjoy problem solving and working with a range of technologies including functional programming languages such as Elixir, using the right tool for the job? You could be progressing your career in a senior, hands-on Software Engineer role at a successful and profitable energy trading market data scale-up. What's in it for you: Competitive salary, to £100k + Significant Equity Hybrid working (3 days London office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership, working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture and design through to implementation. There's a range of technology in the stack, you'll have a 50/50 split between backend and frontend development using TypeScript, Elixir, Elm and AWS amongst others, learning and picking new things up on the job in a collaborative, tech driven environment where you can get stuff done and see the results of your work. Location / WFH: You'll join the team in London three days a week in a hybrid work from home model. About you: You are degree educated in Computer Science or similar STEM discipline, having achieved a 2.1 or above from a Russel Group / Oxbridge or top 100 global university You are an experienced software engineer with a strong knowledge of best practices and Computer Science fundamentals and experience of delivering complex, data centric software You have advanced analytical and problem solving skills You're comfortable taking ownership of projects and mentoring more junior team members You have strong TypeScript skills, combined with any backend programming language (e.g. Python, Java, C++, C#) You're happy to work with the following tech stack (you don't need experience with all): Elixir, Ember, Elm, Phoenix, LiveView, Python, PostgreSQL, AWS, Docker You have an analytical mindset and enjoy problem solving You have experience of working in start-ups / SMEs and have good business acumen Ideally you will have a good understanding of financial markets Apply now to find out more about this Senior Software Engineer (TypeScript Full Stack Elixir) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.
Computer Futures - London & S.E(Permanent and Contract)
Full Stack Software Engineers - Build the Future from Anywhere in the UK! Ready to engineer solutions that matter? Join a cutting-edge tech company where your work powers AI-driven platforms, cloud-native systems, and secure digital infrastructure across industries. Whether you're mid-level or senior, your skills will help shape mission-critical applications used nationwide. Role: Full Stack Software Engineer Location: Remote-first (UK-based) Salary: Up to £75,000 DOE Clearance: Must be SC Clearable (British Citizen, UK residency for 5+ years) Why You'll Love This Role This isn't your average dev job. You'll be part of a high-impact engineering team solving real-world problems with modern tech. From Real Time data processing to AI integration and cloud automation, you'll work on projects that push boundaries-all within a flexible, remote-first culture. What You'll Be Building AI-powered platforms for smarter decision-making Cloud-native microservices using AWS and DevOps best practices Secure, scalable systems for public and private sector clients Modern Front End experiences with React.js and intuitive UI/UX What's In It for You Flexible Work Week: Choose your working hours with TOIL Remote-First Culture: Work from anywhere in the UK, with optional office access Career Coaching: Regular 1:1s with a dedicated coach to support your growth Learning & Development: 5 paid training days per year + premium resources Tech Stack Exposure: Java, Spring Boot, AWS, React.js, DevOps, and more Inclusive Culture: Join a collaborative team that values innovation and diversity Competitive Package: Up to £75K DOE + comprehensive benefits Your Skills & Experience Strong in Java & Spring Boot Hands-on with AWS (Lambda, ECS, S3, etc.) Front End experience with React.js , TypeScript , or Angular.js Familiar with CI/CD pipelines and DevOps tooling Bonus: Exposure to AI/ML , Kubernetes , or serverless architecture Security Clearance Notice Due to the nature of the work, SC Clearance eligibility is essential . You must be a British Citizen and have lived in the UK continuously for the past 5 years . Ready to make an impact? Apply now and be part of a team that's redefining what's possible in tech. To find out more about Computer Futures please visit our website Computer Futures, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales
Sep 25, 2025
Full time
Full Stack Software Engineers - Build the Future from Anywhere in the UK! Ready to engineer solutions that matter? Join a cutting-edge tech company where your work powers AI-driven platforms, cloud-native systems, and secure digital infrastructure across industries. Whether you're mid-level or senior, your skills will help shape mission-critical applications used nationwide. Role: Full Stack Software Engineer Location: Remote-first (UK-based) Salary: Up to £75,000 DOE Clearance: Must be SC Clearable (British Citizen, UK residency for 5+ years) Why You'll Love This Role This isn't your average dev job. You'll be part of a high-impact engineering team solving real-world problems with modern tech. From Real Time data processing to AI integration and cloud automation, you'll work on projects that push boundaries-all within a flexible, remote-first culture. What You'll Be Building AI-powered platforms for smarter decision-making Cloud-native microservices using AWS and DevOps best practices Secure, scalable systems for public and private sector clients Modern Front End experiences with React.js and intuitive UI/UX What's In It for You Flexible Work Week: Choose your working hours with TOIL Remote-First Culture: Work from anywhere in the UK, with optional office access Career Coaching: Regular 1:1s with a dedicated coach to support your growth Learning & Development: 5 paid training days per year + premium resources Tech Stack Exposure: Java, Spring Boot, AWS, React.js, DevOps, and more Inclusive Culture: Join a collaborative team that values innovation and diversity Competitive Package: Up to £75K DOE + comprehensive benefits Your Skills & Experience Strong in Java & Spring Boot Hands-on with AWS (Lambda, ECS, S3, etc.) Front End experience with React.js , TypeScript , or Angular.js Familiar with CI/CD pipelines and DevOps tooling Bonus: Exposure to AI/ML , Kubernetes , or serverless architecture Security Clearance Notice Due to the nature of the work, SC Clearance eligibility is essential . You must be a British Citizen and have lived in the UK continuously for the past 5 years . Ready to make an impact? Apply now and be part of a team that's redefining what's possible in tech. To find out more about Computer Futures please visit our website Computer Futures, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales
