At a Glance
- Tasks: Lead a team in migrating data pipelines and develop cutting-edge financial data solutions.
- Company: Join BMLL, a leading FinTech innovator with a collaborative culture.
- Benefits: Enjoy competitive salary, 25 days holiday, remote work options, and wellness perks.
- Other info: Inclusive workplace with a focus on equality and continuous learning opportunities.
- Why this job: Make an impact in the fast-paced world of finance while growing your tech skills.
- Qualifications: Experience in Agile leadership, C++, and Delta Lake required.
The predicted salary is between 80000 - 100000 £ per year.
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.
At BMLL we process financial data in a process we call parsing. We continually add new financial datasets to our platform whilst upgrading and improving existing ones. Parsing occurs in well defined data pipelines built using a distributed architecture. The engineering of the pipeline is as important as the data transformation process, and we are constantly working to improve its performance and reliability. We curate the data to ensure the highest quality of delivery to our customers. Every day we consume over 1TB of new data across 750,000 securities to deliver into our platform, our dashboard products and data services. These are accessed by our customers who are dependent on our services for their own workflows.
We are in the process of a major technology migration, moving our core data pipelines from generating HDF5 files into generating Delta Tables. This will improve efficiency, ensure future scalability and modernise the architecture. We are looking for an experienced lead to head up a small team (currently 4) in this migration project, and in future architectural and infrastructural changes to our systems, such as performance improvements: performance really matters as we process terabytes of data per day, and need to get it in front of our customers as early as possible.
The role will involve an amount of hands-on development work, in C++ with some Python, organising developers in Agile sprints, and leading scrums as we work through the migration. Planning is a key aspect, both at the sprint level and at the quarterly level alongside the Lead Architect, CTO and Product Team. Within the team, a key focus is helping to unblock developers by working with other teams and providing guidance and technical expertise. You should expect to spend approximately 50% of your time in hands-on development, and 50% in team management.
You will work closely with the Equities and Derivatives market data teams who build the parsers, and the Data Feed team who get our data out to customers. This is an opportunity to join a cutting-edge FinTech company with the potential to grow your technical, finance and cloud- & data-engineering skills.
Responsibilities
- Technical leadership and management of the delta lake migration team, organising work into 2-week sprints, upwards reporting on progress and blockers.
- Development, testing and migration of some of the Delta Lake components.
- Quarterly planning with the Lead Architect, CTO and Product Team.
- In time, line management of a small number of developers.
- Understanding the data, how it reaches BMLL, how we process it and deliver it to customers.
- In time, some second-line support of the daily data production processes and the data, shared amongst the data production teams on a rotational basis.
Requirements
- Demonstrated ability to lead a small team of developers in an Agile environment.
- Demonstrated ability to work with other teams to achieve business outcomes.
- Experience of working with Delta Lake or other open table formats.
- Industry experience of writing production-level C++ and delivering functioning, well-tested systems.
- Industry experience of developing on a Linux platform.
- Experience of industry-standard development methodologies such as source code control, unit testing and continuous integration.
- Ability to self-organise and deliver complex projects.
- Strong problem solving skills.
- Strong communication skills.
- Computer science or other STEM degree.
Benefits
- 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.
- Childcare Nursery Scheme.
- 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 careers@bmlltech.com.
Market Data Team Lead in London employer: BMLL Technologies
BMLL is an exceptional employer that fosters an inclusive and collaborative culture, offering a hybrid working environment with regular team lunches and social activities in London. Employees benefit from competitive salaries, generous holiday allowances, and opportunities for continuous learning and professional growth, all while being part of a cutting-edge FinTech company at the forefront of data analytics and technology migration.
StudySmarter Expert Advice🤫
We think this is how you could land Market Data Team Lead in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, especially those at BMLL. A friendly chat can open doors and give you insights that a job description just can't.
✨Tip Number 2
Prepare for the interview by diving deep into BMLL's tech stack and recent projects. Show us you’re not just a fit for the role but also genuinely interested in what we do!
✨Tip Number 3
Practice your problem-solving skills! We love candidates who can think on their feet, especially when it comes to technical challenges. Brush up on your C++ and Python coding skills.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets the attention it deserves. Plus, we love seeing candidates who take that extra step.
We think you need these skills to ace Market Data Team Lead in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the Market Data Team Lead role. Highlight your experience with C++, Agile methodologies, and any relevant projects that showcase your leadership skills. We want to see how you fit into our vision!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you're passionate about the role and how your background aligns with BMLL's mission. Keep it engaging and personal – we love to see your personality come through!
Showcase Your Problem-Solving Skills:In your application, don’t forget to mention specific examples of how you've tackled challenges in previous roles. We’re looking for someone who can lead a team through complex projects, so let us know how you’ve done this before!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way to ensure your application gets to us quickly and efficiently. Plus, you’ll find all the details you need about the role and our company culture there!
How to prepare for a job interview at BMLL Technologies
✨Know Your Data Inside Out
Before the interview, make sure you understand the types of financial data BMLL works with. Familiarise yourself with Level 1, 2, and 3 data, as well as Delta Lake concepts. This will show your genuine interest in the role and help you answer technical questions confidently.
✨Showcase Your Leadership Skills
As a Market Data Team Lead, you'll need to demonstrate your ability to lead a team in an Agile environment. Prepare examples from your past experiences where you've successfully managed a team, resolved conflicts, or improved processes. Highlight how you can unblock developers and facilitate collaboration.
✨Brush Up on C++ and Python
Since hands-on development is a key part of the role, be ready to discuss your experience with C++ and Python. Consider reviewing some common coding challenges or projects you've worked on. You might even want to prepare for a technical assessment during the interview.
✨Prepare Questions About the Migration Project
The migration to Delta Tables is a significant project for BMLL. Prepare insightful questions about their current challenges, goals, and how they envision the future of their data architecture. This shows your proactive approach and genuine interest in contributing to their success.
