Software Developer - Front Office Trading Technology at GreySpark Partners, London, £500-£900 per day

GreySpark Partners is a specialist consultancy that helps capital markets firms transform how they operate, compete and innovate. We combine deep industry expertise with hands-on delivery to solve complex business, technology and regulatory challenges for investment banks, asset and wealth managers, fintechs and other financial institutions, with a strong focus on front-office trading technology and solutions.

GreySpark is expanding its Technology talent pool and is seeking experienced Software Developers interested in working on complex, business-critical trading platforms within global investment banks and financial markets clients. This is an opportunity to contribute to the design and optimisation of real-time systems across pricing, risk, connectivity and execution workflows.

As a GreySpark technology consultant, you will work closely with front-office and technology teams to deliver both review and delivery projects. Responsibilities include:

• Designing, developing and enhancing components for real-time trading, pricing or risk systems.
• Participating in all phases of the software development lifecycle, from requirements through to production deployment.
• Writing clean, efficient, testable code for high-performance, mission-critical applications.
• Contributing to architecture discussions and solution design within fast-moving delivery environments.
• Collaborating with business analysts, quant teams and senior developers to solve complex technical challenges.
• Working on client-site engagements within dynamic front-office or trading technology environments.

We are particularly interested in developers with strong experience in high-performance or low-latency systems used within financial markets. Ideal candidates will have:

• Strong experience in one or more programming languages used in trading system engineering (Java, C++, C#/.NET).
• Background in server-side development, multi-threading, concurrency or low-latency architectures.
• Experience with SQL and data-driven application design.
• Exposure to front-office or electronic trading environments (e.g., FX, equities, fixed income, commodities) is highly desirable.
• Experience working with established development methodologies such as Agile or iterative delivery.
• Familiarity with cloud technologies or modern DevOps toolchains is beneficial.
• Demonstrable ability to deliver high-quality software in complex, time-sensitive environments.

• Bachelor’s degree in Computer Science, Engineering or a related discipline.
• Professional certifications are welcome but not mandatory.

Why Join GreySpark?

Gain access to a continuous pipeline of challenging front-office technology projects at leading financial institutions, with the flexibility to take on assignments that match your skills and interests.

Working with GreySpark allows you to focus on solving complex technical challenges while we manage client relationships and project logistics. You’ll build a diverse portfolio of experience across trading systems, market data, connectivity and risk technology, and join a network of highly skilled professionals in the capital markets technology space.