Core Software Engineering Intern - Summer 2026

The Firm

XTX Markets is a leading algorithmic trading firm which uses state-of-the-art machine learning technology to produce price forecasts for over 50,000 financial instruments across equities, fixed income, currencies, commodities and crypto. It uses those forecasts to trade on exchanges and alternative trading venues, and to offer differentiated liquidity directly to clients worldwide. The firm trades over $250bn a day across 35 countries and has over 250 employees based in London, Singapore, New York, Paris, Bristol, Mumbai, Yerevan and Kajaani.

We leverage the talent of the people who work here, modern computational techniques and state-of-the-art research infrastructure to analyse large data sets across markets quickly and efficiently, to maximize the effectiveness of our proprietary trading algorithms. We are actively seeking new methods and ideas. The models that drive our trading strategies have evolved considerably over the last 10 years, from econometric methods that gave our company its name, to trees, to neural networks, to modern deep learning architectures.

XTX Markets has an unrivalled level of computational resources in the trading industry, with a growing research cluster currently containing over 25,000 GPUs with 650 petabytes of usable storage. Teams across the firm include world-class researchers with backgrounds in pure math, programming, physics, computer science and machine learning. The firm is also constructing a large-scale data centre in Finland to future-proof its significant computational capabilities.

At XTX Markets technology is our business and we are a diverse organization which attracts outstanding talent from across all industry backgrounds. We are focused on teamwork and our people collaborate on all aspects of the business, working openly and with respect for each other, our clients and the market. Our culture is non-hierarchical and one where everyone is valued. We strive for excellence in everything we do.

The Role

The Core Technology team will host 2 interns for 10-12 weeks in Summer 2026. (Start-date flexible).

Core Technology builds and runs our technology platform supporting the post-trade activities of our Operations, Risk, Compliance, Tax, Treasury and Financial Control teams. The platform has been developed in-house using a distributed microservices architecture to provide high throughput (millions of trades per day) and high availability while also allowing very agile but well-controlled development practices (multiple production releases per day). The primary development language for back-end services is Go, with web-based GUI development in JavaScript.

Process: 1 x 30-minute phone screen with a member of our Core Development Team. If successful, this will be followed by a 60-minute technical interview with the HM / Intern Mentor for this role.

Essential Attributes

• You should be in your penultimate year of university study, strong preference for Mathematics, Computer Science or Physics related courses.
• You should have completed software development projects outside of your university coursework.
• We have a preference for those with work experience of any kind (i.e. even a part-time role outside of industry or field).

Application Notes

Please prepare a CV and answer all questions on the application form. You’re also welcome to attach a supporting cover letter. We can be slightly flexible on start dates, but all internships will take place in Summer 2026, and we are not able to offer off-cycle internships.

We expect to receive a high volume of applications for our Summer 2026 internships. Whilst we are happy to consider your application for more than one opening, we ask that you only submit one application. We will reallocate you if appropriate based on the preferences listed on your application form.

Please Note – XTX does not run a graduate program, and the successful completion of an internship does not necessarily result in a full-time role upon graduation. We offer internships to provide insight into the inner workings of a leading algorithmic trading firm.

Applications will close on the 21^st September. If your application is shortlisted and the team would like to move forwards with an interview, you will hear back from us during the final week of September.


Benefits

• Onsite gym, sauna, and fitness classes at no charge.
• Extensive medical benefits including an on-site doctor and therapist at no charge.
• Breakfast and lunch provided daily.
• Beautiful Kings Cross office: https://vimeo.com/257888726