About BMLL

BMLL is the leading independent provider of harmonised Level 3, 2 and 1 historical data and analytics across global equities, ETFs, futures and US equity options. We provide market participants with immediate access to granular T+1 order book data and advanced analytics, enabling them to accelerate research, optimise trading strategies, and better understand market behaviour.

BMLL was acquired in 2025 by Nordic Capital, alongside minority shareholder Optiver, marking a joint commitment to accelerate the company’s next phase of growth.

We offer an inclusive and collaborative culture, a hybrid working environment that includes regular days in our London office, weekly team lunches, and a variety of out-of-hours social activities.

For more information, visit our website or follow us on X (@bmlltech) and LinkedIn @BMLL.

About the Role

At BMLL we process terabytes of historical market data every day into suites of data products, which we then deliver to our customers.

This is an exciting opportunity for someone at or near the beginning of their career in technology to join us in the Data Distribution team. Our team owns the mechanisms that deliver data to customers, and ensures they’re robust, scalable and secure.

Our promise is that however a customer gets BMLL's data, they get it in the most efficient, cost-effective and timely manner possible, and the systems we build and maintain are responsible for keeping it.

These systems are engineered to a high standard, using many technologies including Python, SQL, RDS/Postgres, Snowflake and Celery.

Your job will involve contributing to ongoing design and development, ensuring what we own stays efficient, precise, easy to understand, easy to operate, and free of errors. Our team is crucial to the success of BMLL's technology and commercial strategies.

Responsibilities

• Design and build solutions to distribute data to customers.
• Ensure 24/7 system reliability by implementing company and industry best practices.
• Implement workflow management software to automate operational tasks and optimize the utilisation of infrastructure and applications.
• Design and implement CI/CD workflows to maintain software quality via continuous and automated deployment and testing.
• Work hand-in-hand with product and operations teams.
• Review and assess tools that become available in the industry.

Requirements

Essential

• Degree in computer science or other STEM degree plus demonstrable computer science skill-set.
• 2+ years industry experience as a software engineer, or a data engineer leaning to software engineering.
• Good working knowledge of Python and SQL.
• Robust theoretical or practical understanding of concepts in distributed systems.
• Familiarity with Linux.
• Avid learner, problem solver and detail-orientation.
• Excellent communication skills.

Desirable

Experience with:

• Development using AWS (or other cloud provider’s) services.
• Snowflake, Databricks
• Working knowledge of admin-proximate tasks on a conventional RDBMS e.g., Postgres or Oracle query optimisation.
• C++, or C and Java

Benefits

• Competitive salary

We are an inclusive employer and welcome applicants from all backgrounds. We pride ourselves on our commitment to Equality and Diversity. We are committed to removing barriers throughout our hiring process. If you have any special requirements or require reasonable adjustments to help you access career opportunities at BMLL, please do let us know at careers@bmlltech.com.