Location
London office, London

Hours
Full Time - 12 weeks, starting June 2027

Salary
Negotiable

About the Role
The Software Engineer Summer Internship at London Stock Exchange Group (LSEG) offers a unique opportunity to experience a career within the Post Trade Solutions (PTS) engineering team. You will work on real projects alongside experienced engineers in the Optimisation Core Technology Team, part of the Post Trade Engineering division based in London. The internship focuses on building and improving systems that deliver optimisation services to financial market clients. These systems securely handle risk and trade data, deliver computations, and provide actionable feedback to clients. Hosted in the cloud using AWS technologies such as lambdas, EC2, RDS, and Redshift, the team works collaboratively to enhance these services based on client feedback and strategic initiatives.

During the internship, you will join a team of 5-10 engineers working on projects including designing workflows for data quality checks, collaborating with analytics teams, building internal portals, implementing connectivity to external systems, and improving task queueing systems. The role involves software development primarily in Python and offers exposure to cloud infrastructure and financial engineering applications.

The programme runs for 12 weeks starting June 2027. Applications close on 30th November, with early applications encouraged as candidates are reviewed on a rolling basis. The recruitment process includes application submission, technical and coding assessments, an immersive online assessment, a video interview, and a virtual half-day assessment centre.

Life at LSEG
LSEG values innovation, quality, and continuous improvement. The company supports hybrid working with three days in the office and flexible working arrangements. With a global workforce of 25,000 across 65 countries, LSEG fosters an inclusive culture that values individuality and diversity. The organisation is committed to equal opportunities and reasonable accommodations for employees' religious practices and disabilities. LSEG promotes sustainability and community engagement through its charitable foundation and offers a range of benefits including healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.

Experience
Penultimate or final year undergraduate student planning to continue to a Masters in 2027/28, studying Computer Science, Engineering, or a relevant technology field. Familiarity with Python for executable and repeatable programs is essential. Experience with UNIX command line is required. Some exposure to AWS and/or frontend development is a plus.

About you
Passionate about a career in Financial Engineering and eager to learn about the full business. Strong collaboration and communication skills. Curious about data with the ability to analyse information, draw conclusions, and propose solutions. Demonstrates that how you achieve results is as important as what you achieve. Eligible to work in London or New York City without restrictions for the duration of the internship.

Qualifications
Currently enrolled in an undergraduate degree relevant to technology with plans to pursue a Masters degree. No additional formal qualifications required beyond academic standing and relevant technical skills.