Senior Software Engineer, Product Security Engineering – London Stock Exchange Group

The LSEG DevSecOps Engineering team inside the cyber security division is looking for Senior Software Engineers to build tools and automations to help secure software development for thousands of developers across the group.

You will be working as part of a geographically distributed remote team comprising of security engineers and software engineers. Our team's mission is to allow engineers to embed security best practices frictionlessly as part of their day to day work.

Responsibilities and Skills

• Deep understanding of cyber security principles, secure software development, and threat modeling
• Experience conducting security assessments, code reviews, and vulnerability management across diverse technology stacks
• Experience in building full-stack products (web applications, APIs, CI tooling or low-level software)
• Hands‑on experience with cloud technologies (AWS, GCP, Azure) and containers (Docker, Kubernetes), with a focus on security
• Familiarity with infrastructure‑as‑code (Terraform, Pulumi, CloudFormation)
• Knowledge of supply chain security risks and mitigation strategies in the SDLC
• Ability to build and automate security tools, processes, and controls (e.g., web apps, APIs, CI/CD integrations)
• Strong communication skills for advising and educating engineers on secure coding and remediation
• Knowledge of common algorithms and data structures for dealing with large quantities of data (e.g., building data‑intensive systems)
• Experience analysing large datasets for security monitoring, detection, or incident response

Note: You do not need all the skills listed above to qualify. We are primarily interested in security‑minded professionals with a strong interest in secure software development.

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.

About LSEG

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.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of 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.

We are committed to sustainability across our global business and proudly partner with our customers to help them meet their sustainability objectives.

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