Intern - Software Engineer

• Deadline: November 30th, 2026
• Salary: Competitive
• Location: London (Hybrid)
• Degree required: Master's expected
• Duration: 12 weeks
• Starting: June 2027
• Disciplines: Software, Computer Science, IT, Systems, Data

Please review all the internship programme opportunities and make one application.

Our Software Engineer Summer Internship has been crafted so that you can understand what a career in the Post Trade Solutions (PTS) engineering team at LSEG would really be like. In the internship you will work on projects solving real problems and work as part of a team with experienced engineers.

This position is within the Optimisation Core Technology Team, part of the Post Trade Engineering division based in our London office.

To be eligible, you should be in the penultimate year of your undergraduate or final year of an Undergraduate degree and plan to continue onto Master's for academic year 2027/28 studying Computer Science, Engineering, or any other relevant tech field.

Internship Summary

The Core Technology team creates the systems that deliver the optimisation services to clients. It is this team’s responsibility to design and build systems that permit financial market participants to securely provide risk and trade data to the company, to deliver that data to the optimisation services developed by the financial engineers, and to return the output of those computations safely back to the participants in a timely manner.

In addition, the systems should provide feedback to the clients to help them understand the results as well as how they can modify their parameters and data to gain improvements in the future. Our systems live in the cloud, hosted by AWS, and leverage lambdas, EC2, RDS, and Redshift.

The successful candidate will work as part of a team of 5-10 engineers to build and research improvements to the applications & environment. They will work directly with the Product Development team to enhance the services based on feedback from clients and analysis of runs as well as on strategic projects.

Examples of possible projects, which involve writing software in python, include:

• Designing and building a new workflow to run data quality (DQ) checks on financial data submitted by the clients
• Collaborate with the Analytics team to leverage their pricing algorithms in our DQ checks
• Building the internal portal screens used by the Product team to perform the optimisations
• Implement the code providing connectivity to external booking systems, trade stores, etc.
• Enhance our task queueing system to improve resource utilisation

What we are looking for:

We are passionate about recruiting people who are interested in pursuing a career within Financial Engineering and would like to learn about the full breadth of our business – and are interested in playing a part of our development, as it grows and diversifies.

• Solid understanding of python for executable & repeatable programs (as opposed to data analytics). Affinity to PyData stack is preferred.
• Someone who can collaborate with others, using their communication skills in the process.
• A curiosity for data and an ability to analyse information to draw conclusions and propose solutions.
• Familiarity with UNIX command line
• Some experience with AWS and/or frontend development is a plus
• Ideal candidates will have the rights to work in London without restrictions for the duration of the internship programme

You will stand out to us if you can demonstrate and recognise that what you achieve is equally important as how you achieve it.

Benefits

At LSEG, we provide our employees with a comprehensive benefits portfolio as part of a competitive total rewards package. Our benefit plans are designed to supplement the financial, emotional and physical wellbeing of our employees and their families at all stages of their life. We encourage an appreciative, collaborative and inclusive culture that promotes employee and organisational wellbeing.

We believe hybrid working makes more possible and recognise difference as a good thing. We want to set everyone up to bring their best self to work. Everyone will spend time with colleagues in the office (3 days), but you’ll be trusted to work flexibly, in a way that delivers excellence.

Recruitment Process:

• The first stage of the recruitment process involves making an application and submitting your resume.
• The second stage is completing Technical and Coding Assessment. This technical assessment is designed to evaluate your coding ability, logical reasoning and problem-solving skills.
• The next stage of the application process is an untimed Immersive Online Assessment. The assessment is designed to give you an insight into what it’s like to work at LSEG.
• The third stage is a video interview where you will answer a series of questions using a strength-based-interview style
• The final stage is a virtual half day assessment centre which involves several different types of exercises – further information is provided at the point of invite.

Please note, all our assessment centres are held virtually.

We recommend an early application as we consider candidates on a rolling basis. Due to the volume of applications, we might close the applications earlier, so we recommend an early application.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.