Senior Python Developer

lseg; City of Edinburgh; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work model

Office presence 3 days/week

Competitive compensation and benefits

Career development opportunities

Job summary

London Stock Exchange Group (LSEG) is seeking a Lead Software Engineer to design and develop scalable Python-based platforms that enable AI-powered product evaluation. The role sits at the intersection of software engineering, data science, and AI, helping establish engineering standards and responsible use of AI across the organisation.

You'll lead technical direction, mentor engineers, and collaborate with data scientists to deliver platforms, services, and tooling that support consistent and

Qualifications

• Proven production software development experience with Python.
• Experience designing robust, scalable cloud-based systems.
• Strong focus on code quality, security, and operations.
• Experience guiding technical direction or mentoring engineers.
• Experience building platforms or shared services that support multiple teams.
• Curiosity about AI technologies and responsible use in software development.

Responsibilities

• Design, develop, and maintain scalable Python-based software solutions and services.
• Build reusable platforms and tooling for evaluating AI-assisted applications across teams.
• Collaborate with data scientists and engineers to translate requirements into technical solutions.
• Support deployment and operational activities within Azure, collaborating with DevOps and platform teams.

Skills

Python

Cloud platforms (Azure)

Software design & architecture

Mentoring & leadership

DevOps collaboration

Data science collaboration

Job description

Role profile

Build the platforms that help shape how AI-assisted applications are evaluated across our organisation. We're looking for a Lead Software Engineer to design and develop scalable software solutions that enable the testing, evaluation, and continuous improvement of AI-powered products. Working at the intersection of software engineering, data science, and AI, you'll help create the technical foundations that support reliable, data-driven decision making across the organisation.

Role summary

Our Lead Software Engineers are hands-on technical leaders who design, build, and evolve scalable software systems while providing technical leadership within their area of expertise. In this role, you'll work closely with software engineers and data scientists to develop platforms, services, and tooling that support AI application evaluation. You'll contribute across the software lifecycle, from solution design and architecture through implementation, deployment, and operation, while helping establish engineering standards that promote quality, maintainability, and the responsible use of AI. You'll combine strong software engineering fundamentals, practical cloud experience, and a collaborative approach to deliver solutions that have impact across multiple teams.

What you'll be doing:

• Design, develop, and maintain scalable software solutions and services, primarily in Python, which measure the quality, reliability, performance, and safety of AI-assisted applications.
• Build reusable platforms, frameworks, and tooling that enable teams across the organisation to evaluate AI-assisted applications consistently and efficiently.
• Partner closely with data scientists and engineers to understand evaluation methodologies, translate requirements into technical solutions, and enable data-driven insights.
• Support deployment and operational activities within Azure, collaborating with DevOps and platform teams where appropriate.
• Own the technical direction, promote engineering best practices, mentor colleagues, and help raise technical standards across the team.
• Leverage AI-assisted development tools responsibly and effectively to improve productivity, software quality, and delivery outcomes.

What you'll bring:

• Strong professional experience developing production software, with significant experience in Python.
• Experience designing and delivering robust, scalable systems and services in cloud environments.
• Strong understanding of software engineering principles, including code quality, maintainability, security, and operational excellence.
• Experience influencing technical direction, driving engineering improvements, or mentoring other engineers.
• Experience building platforms, frameworks, or shared services that support multiple users or teams.
• Curiosity about AI technologies and a commitment to using AI tools responsibly and effectively within the software development lifecycle.

Desirable

• Practical knowledge of DevOps practices, including CI/CD pipelines, automated testing, source control workflows, and application monitoring.
• Experience working with cloud platforms, ideally Azure, including deploying and operating applications and services.

What you'll get in return:

• High-impact projects : We work on a variety of core projects pioneering AI products across the organisation.
• Competitive benefits : We offer a strong compensation package, comprehensive benefits, and ongoing investment in career growth and skill development.
• Industry leadership : We deliver brand-new AI-products that democratise financial analytics solutions.
• Career progression : We provide opportunities for continuous learning and professional development in a work environment of dedicated, highly experienced teams.
• We recognise that to attract the best talent, we need to be flexible, and we are open to discussing work arrangements with you. We take a hybrid approach to the workplace; this role will require attending the office at least three days per week.

Career Stage:

Manager

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