At a Glance
- Tasks: Design and build innovative analytics applications using C#/.NET and React.
- Company: Join a leading financial services firm with a collaborative culture.
- Benefits: Enjoy hybrid work, competitive salary, and opportunities for professional growth.
- Other info: Dynamic team environment with excellent career advancement opportunities.
- Why this job: Make an impact by transforming complex data into actionable insights.
- Qualifications: Degree in a quantitative field and experience in software development required.
The predicted salary is between 51750 - 63250 £ per year.
We are seeking a Full Stack Developer with a strong quantitative or analytical background to help build and evolve a global analytics platform. This role is ideal for someone who enjoys working at the intersection of software engineering, data, and applied mathematics, and who is comfortable reasoning about complex systems, models, and workflows.
The role has a balanced 50/50 split between C#/.NET backend development and React frontend development, and sits within a highly collaborative analytics team. You will work closely with traders, analysts, and operations teams to design and deliver systems that turn large, complex datasets into actionable insights. This is a hands-on engineering role rather than a purely UI or purely mathematical position, but a quantitative mindset and strong problem-solving skills are essential.
Key Responsibilities
- Design, build, and enhance end-to-end analytics applications using C#/.NET on the backend and React on the frontend.
- Work across the full development lifecycle, from concept and modelling through to implementation, testing, and deployment.
- Collaborate directly with business users (e.g. traders, operators, analysts) to translate quantitative requirements and workflows into robust software solutions.
- Build performant, maintainable APIs and services that support data-heavy and computation-focused use cases.
- Develop intuitive, data-driven user interfaces that expose complex logic and datasets in a clear, usable way.
- Contribute to design discussions, code reviews, and architectural decisions within a highly skilled global team.
- Deliver high-quality, well-tested code under time pressure while maintaining a strong focus on correctness and performance.
Required Qualifications & Experience
- Bachelor's or Master's degree in Mathematics, Applied Mathematics, Engineering, Physics, or a similarly quantitative discipline, or Computer Science (or closely related).
- Up to 10 years of professional experience in software development (typically 4–9 years).
- Strong commercial experience with C# and .NET (ASP.NET Core, Web APIs), building backend services for enterprise or analytical systems.
- Strong experience with React and modern frontend development, with the ability to build clean, maintainable, data-driven UIs.
- Solid understanding of data structures, algorithms, and computational problem-solving.
- Experience working with relational databases and SQL (e.g. SQL Server, PostgreSQL, Oracle).
- Comfortable reasoning about numerical data, models, edge cases, and correctness.
- Experience working in agile/scrum environments.
- Strong communication skills and the ability to engage directly with technically minded and non-technical stakeholders.
Desirable (but not essential)
- Experience in quantitative, trading, commodities, or financial systems.
- Exposure to messaging or event-driven architectures (e.g. Kafka).
- Experience with Reactive Extensions (Rx), async workflows, or concurrency-heavy systems.
- Familiarity with GraphQL or gRPC.
- Background in building systems that support analytics, optimisation, or decision-support use cases.
What We're Looking For
- A developer who enjoys thinking deeply about problems, not just implementing tickets.
- Someone comfortable working with complex data and business logic, even if they are not a pure quant.
- A balanced engineer who values both backend correctness and frontend clarity.
- A pragmatic, delivery-focused mindset with strong attention to detail.
Full Stack Developer | .NET & React | Quant Background | London, Hybrid employer: Source Group International
As a Full Stack Developer in our London-based financial services team, you'll thrive in a dynamic hybrid work environment that fosters collaboration and innovation. We prioritise employee growth through continuous learning opportunities and a culture that values diverse perspectives, ensuring you can develop your skills while contributing to impactful projects that transform complex data into actionable insights. Join us to be part of a supportive team where your contributions are recognised and rewarded, making a meaningful difference in the world of finance.
Contact Details:
Source Group International Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land Full Stack Developer | .NET & React | Quant Background | London, Hybrid
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Source Group International or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Source Group International.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Source Group International.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Source Group International that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Full Stack Developer | .NET & React | Quant Background | London, Hybrid
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Source Group International.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Source Group International and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Source Group International
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Source Group International uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
