Lead Software Engineer, London Stock Exchange
Financial Data Platform
Stock exchange in the City of London
Be an early applicant
Stock exchange in the City of London
1001+ employees
Be an early applicant
1001+ employees
Company mission
To make things happen, out there in the real world, where it matters.
Role
Who you are
- Either lead the development of production systems in Python, or have equivalent depth in Java, C#, C, C++, Scala, Go, or Rust and be motivated to make Python your primary language in this role
- Bring depth in software design and architecture: decompose complex problems, define appropriate boundaries and interfaces, evaluate alternatives, and explain the reasoning behind decisions
- Take ownership of technical and production outcomes, including how systems behave in production
- Have strong experience with relational databases such as PostgreSQL or Aurora PostgreSQL, including data modelling, query performance, scalability, and schema evolution under production workloads
- Have solid AWS experience and strong CI/CD, automation, testing, and software delivery practices
- Have experience with data-intensive systems, including areas such as batch processing, ETL, schema evolution, data quality, and reasoning about correctness at significant scale
- Have excellent communication skills and adapt explanations of technical decisions to different audiences, creating shared understanding across engineering, product, and business stakeholders
- Take a collaborative approach to engineering, value strong teams and shared ownership over individual heroics, and thrive in an Agile environment
Desirable
- Have experience with Apache Spark / PySpark and optimising large-scale distributed processing
- Have big data experience designing and operating systems for datasets and workloads well beyond single-machine scale
- Have experience with Apache Iceberg, Delta Lake, or similar open table formats and lakehouse architectures, Databricks, Snowflake, or comparable data platforms
- Have experience with CI/CD tooling such as GitLab CI, Jenkins, or GitHub Actions
- Have experience with infrastructure as code using technologies such as Terraform or AWS CDK, and broader platform or DevOps practices
- Have experience in financial markets, index data, investment analytics, or other data-intensive financial products
What the job involves
- You’ll join the team building the next-generation index data platform at FTSE Russell and help shape it
- Design, write, review, and ship production software, primarily in Python, setting the standard for good engineering through the code you deliver
- Own technical direction and architecture for a defined area of the platform, making trade-offs explicit so the team can move quickly and confidently
- Lead the design of software systems—including services, APIs, shared libraries, and their interfaces—with resilience, performance, maintainability, and reusability designed in
- Drive engineering quality across the team through code reviews, well-designed shared components, testing, refactoring, automation, and secure development practices
- Mentor and coach engineers through pairing, code reviews, design guidance, and hands-on technical support
- Assess technical design and risk trade-offs, including failure modes, operational readiness, security, performance, and cost, and resolve blockers that slow the team down
- Design data-intensive software across relational databases such as Aurora PostgreSQL, object storage, and AWS services, with attention to data modelling, performance, and schema evolution at scale
- Build software that processes data at scale on AWS using technologies such as Lambda and containerised services, and, where appropriate, Glue, EMR Serverless, and lakehouse table formats such as Apache Iceberg
- Embed observability, automated testing, monitoring, and quality controls so issues are identified before they affect customers
- Take ownership of production outcomes and help the team build reliable, supportable software that is straightforward to operate
- Influence and collaborate across engineering teams, translating effectively between technical and non-technical audiences
- Build deep knowledge of the financial indices domain and use that understanding to guide technical and architectural decisions
- This is a hands-on Lead Individual Contributor role, not a people management role; you’ll continue designing, writing, and reviewing code every week while owning architecture and technical direction in a defined area, mentoring engineers, and raising engineering quality across the team
Salary benchmarks
Our take
The London Stock Exchange is one of the world’s oldest stock exchanges, with a history dating back over 300 years. It operates as a part of LSEG (London Stock Exchange Group), one of the world’s leading providers of financial markets infrastructure, as a marketplace to enable stock brokers and traders to buy and sell stocks, bonds, and other securities.
The London Stock Exchange has lived through a stream of innovations; from telegraph and telephone, to the Market Price Display System, automatic trade matching, and the digitisation of issuer services. In 2019 it acquired Refinitiv, a financial information company, and in doing so became a global financial news and data business.
Over the last few years, the London Stock Exchange has made moves to support the evolution of private markets and further build its presence in this space. It partnered with Floww, a platform that connects investors with private companies, with aims to launch a private primary capital raising facility, as well as exploring new technologies and secondary market options for the platform.
Steph
Company Specialist at Welcome to the Jungle
Insights
21% employee growth in 12 months
Company
Company HQ
City of London, London, UK
Leadership
David Schwimmer
(CEO)Prior to joining LSEG in 2018, David was a Managing Director at Goldman Sachs for over 20 years.
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