At a Glance
- Tasks: Lead a team in migrating to Delta Lake while developing and optimising data pipelines.
- Company: Join BMLL, a leading FinTech innovator with a collaborative culture.
- Benefits: Enjoy competitive salary, 25 days holiday, remote work options, and continuous learning opportunities.
- Other info: Inclusive workplace with regular team socials and a focus on well-being.
- Why this job: Make a real impact in a cutting-edge tech environment while growing your skills.
- Qualifications: Experience in C++, Agile leadership, and familiarity with Delta Lake or similar technologies.
The predicted salary is between 70000 - 90000 € per year.
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.
About the Role
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 1 TB 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 and reporting progress and blockers to senior leadership.
- Development, testing and migration of 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, providing second‑line support of the daily data production processes 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.
Market Data Team Lead in London employer: BMLL
BMLL is an exceptional employer, offering a dynamic and inclusive work culture that fosters collaboration and innovation. With a strong focus on employee growth, we provide opportunities for continuous learning through funded training and challenging projects, alongside a competitive benefits package that includes flexible working arrangements and a well-being budget. Join us in our London office to be part of a cutting-edge FinTech company where your contributions directly impact the future of financial data processing.
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, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Prepare for interviews by practising common questions and showcasing your technical skills. Make sure you can talk about your experience with C++ and Agile methodologies confidently. We want to see how you can lead a team and tackle challenges head-on!
✨Tip Number 3
Showcase your passion for data and technology during interviews. Talk about projects you've worked on, especially those involving Delta Lake or similar technologies. Let us see your enthusiasm for the role and how you can contribute to our growth at BMLL.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our awesome team at BMLL.
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++, Python, and any relevant projects that showcase your leadership in Agile environments. We want to see how your skills align with our needs!
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 makes you a perfect fit for BMLL. Don’t forget to mention your experience with Delta Lake or similar technologies.
Showcase Your Problem-Solving Skills:In your application, give examples of how you've tackled complex projects or unblocked teams in the past. We love seeing candidates who can think on their feet and lead others through challenges!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands. Plus, you’ll find all the details about the role and our company culture there!
How to prepare for a job interview at BMLL
✨Know Your Tech Inside Out
Make sure you brush up on your C++ and Python skills, as well as your understanding of Delta Lake and data pipelines. Be ready to discuss your past experiences with these technologies and how they relate to the role at BMLL.
✨Showcase Your Leadership Skills
Since this role involves leading a small team, be prepared to share examples of how you've successfully managed teams in an Agile environment. Highlight your experience in organising sprints and how you’ve helped unblock developers in previous projects.
✨Understand the Business Context
Familiarise yourself with BMLL's services and the importance of data quality in financial markets. Being able to articulate how your work will impact customers and improve their workflows will show that you’re aligned with the company’s goals.
✨Prepare for Problem-Solving Questions
Expect to face technical challenges during the interview. Brush up on your problem-solving skills and be ready to walk through your thought process on how you would tackle complex issues related to data processing and system performance.
