Data Platform Engineer

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, for which we have a powerful data processing platform built on AWS to provide best-in-class capacity, scalability and reliability.

We are looking for a Data Platform Engineer to join BMLL's Core Engineering team, where you'll architect the core platform in which BMLL's development teams execute highly complex data pipelines. You'll design and build solutions that scale compute to millions of concurrent job executions, optimised to meet performance, efficiency and cost-effectiveness requirements, while ensuring high availability.

Data Platform Engineers bridge the gap between software and infrastructure, and are essential to the success of BMLL's technology strategy.

Responsibilities

• Design and build software solutions to scale AWS compute resources to meet application performance requirements.
• Ensure 24/7 system reliability by implementing company and industry best practices in replication, redundancy and monitoring.
• Implement workflow management software, to automate operational tasks and optimise the utilisation of infrastructure and applications.
• Design and implement CI/CD workflows to maintain software quality via continuous and automated deployment and testing.
• Work with development and operations teams to design solutions to complex problems, involving large data pipelines that process terabytes of historical market data, in the most efficient and cost-effective manner.
• Regularly review and assess new tools that become available in the industry and assess how they could be integrated into the platform to continuously improve.

Essential

• Industry experience with cloud computing tools and services in complex systems, preferably in AWS.
• Strong Python programming skills.
• Industry experience with software development lifecycle processes and tools.
• Experience working in a Linux environment.
• Experience with Docker.
• Experience with SQL and relational databases.
• Avid learner, problem solver and detail-orientated.
• Excellent teamwork and the ability to communicate and work in multidisciplinary teams in a collaborative manner.
• Computer science or other STEM degree.
• At least two years of industry experience.

Desirable

• Familiarity with distributed systems concepts and tools, such as Spark, Ray, RabbitMQ, Kafka, AWS Batch.
• Familiarity with DevOps practices and tools, such as Terraform.
• Familiarity with job execution and orchestration tools, such as Celery and Airflow.

• 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
• 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 [email protected].