Intern - Software Engineer

LSEG; City Of London; On-site; GBP 22,000 - 31,000; Full time

Job summary

The London Stock Exchange Group (LSEG) is offering a 12-week Software Engineer Summer Internship in its Post Trade Solutions (PTS) engineering team. The programme starts in June 2027 and targets penultimate-year undergraduates or final-year students in Computer Science or related tech fields.

The successful intern will work with a team of 5–10 engineers, solving real problems and collaborating with Product Development to enhance services for clients using Python, AWS, and cloud-based systems.

Qualifications

• Solid understanding of python for executable & repeatable programs.
• Affinity to PyData stack is preferred.
• Strong collaboration and communication skills.
• Curiosity for data and ability to analyse information.

Responsibilities

• Designs and builds software in Python as part of a team.
• Collaborates with Product Development to implement feedback from clients.
• Researches improvements to applications and the software environment.
• Implements connectivity to external booking systems and trade stores.
• Enhances the task queueing system to improve resource utilisation.

Skills

Python

UNIX

AWS

Frontend

Data analysis

Education

Undergraduate degree in CS/Engineering

Tools

Git

Docker

PyData

Job description

Duration: 12 Weeks

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.

Programme starts: June 2027

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 Masters 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 the London or New York City 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.

Applications close: 30th November, we recommend an early application because we consider candidates on a rolling basis and may close applications early.

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 run virtually.

Life at LSEG

We believe hybrid working makes more possible andrecognise difference as a good thing. We want to seteveryone up to bring their best self to work. Everyone will spend time with colleagues in the office (3 days), butyou’ll be trusted to work flexibly, in a way that deliversexcellence.

Career Stage

Associate

London Stock Exchange Group (LSEG) Information

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

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.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

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