Software Engineer

Job Description

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 market data every day into a data feed of normalized historical data products. We have many customers, and many different ways our customers want to consume our data.

This role is an exciting opportunity for someone near the beginning of their career in technology to join us in the Datafeed Distribution team, where we develop and maintain the mechanisms that deliver data to our customers.

The promise we make is that however a customer gets BMLL’s data, they get it in the most efficient, cost-effective and timely manner possible. Performing that task is no mean feat, and requires overcoming a lot of obvious problems - but many more subtle ones. It’s a challenge but we thrive on it.

Our systems are engineered to a high standard. The technologies we use include cloud databases like Databricks and Snowflake, open table formats e.g., Delta and Apache Iceberg; Apache Airflow and Celery for data processing workflows. Most of our tooling is in Python and SQL, and everything we run internally runs on AWS.

Your job will involve contributing to ongoing the design and development of these systems, from basic architecture down to implementation of complex features, ensuring that what we own stays efficient, precise, scrutable, operable and error-free. Our team is crucial to the success of BMLL’s technology and commercial strategies.

Responsibilities

• Design, analysis and implementation of features in the data distribution platform.
• 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.

Essential

• Degree in computer science or other STEM degree plus demonstrable computer science skill-set.
• Excellent communication and problem-solving skills.
• 2+ years industry experience as a software engineer, or a data engineer leaning to software engineering.
• Experience writing software on AWS.
• Familiarity with Databricks and/or Snowflake.
• Excellent working knowledge of Python and SQL.
• Robust theoretical or practical understanding of concepts in distributed systems.
• Familiarity with Linux, Docker and Pytest.

Desirable

Deep Experience with:

• Databricks or Snowflake

• C++ / C and Java

• Working knowledge of admin-proximate tasks on a conventional RDBMS e.g., Postgres or Oracle query optimisation.

• Competitive salary

• 25 days holiday plus bank holidays

• Discretionary Bonus

• Pension Scheme

• Private Medical Insurance

• Work remotely abroad for up to 40 business days each year

• Life Insurance

• Nursery salary sacrifice

• Combination of remote and London-based office working, with 2 days in the office per week.

• A yearly Well-being Physical Activity budget

• Continuous learning through funded training and challenging projects

• Collaborative culture

• Weekly team lunches

• Free Fruit, snacks, and drinks provided throughout the day (When office-based)

• Regular Team Socials

• Cycle to Work Scheme

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 [email protected].