At a Glance
- Tasks: Lead a team in migrating to Delta Lake and enhance data processing systems.
- Company: Join BMLL, a leading FinTech with a collaborative and inclusive culture.
- Benefits: Enjoy competitive salary, 25 days holiday, remote work options, and wellness budget.
- Other info: Dynamic role with excellent career growth and a focus on continuous learning.
- Why this job: Make a real impact in a cutting-edge tech environment while growing your skills.
- Qualifications: Experience in leading teams, C++, Delta Lake, and Agile methodologies required.
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 at careers@bmlltech.com.
Market Data Team Lead employer: BMLL
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 working on cutting-edge technology in the dynamic FinTech sector.
StudySmarter Expert Advice🤫
We think this is how you could land Market Data Team Lead
✨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. Try coding challenges or mock interviews to sharpen those skills before you meet us.
✨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 keen on joining our team!
We think you need these skills to ace Market Data Team Lead
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, it shows us you’re serious about joining our team at BMLL!
How to prepare for a job interview at BMLL
✨Know Your Data Inside Out
Before the interview, make sure you understand the types of data BMLL works with, especially Level 1, 2, and 3 historical data. Familiarise yourself with how parsing works and the importance of data quality in delivering to customers. This knowledge will show your genuine interest in the role.
✨Showcase Your Technical Skills
Be prepared to discuss your experience with C++ and Python, particularly in a production environment. Bring examples of past projects where you've successfully implemented Agile methodologies or led a team through a technical migration. This will demonstrate your hands-on capability and leadership skills.
✨Emphasise Collaboration
BMLL values teamwork, so highlight your ability to work with cross-functional teams. Share specific instances where you've collaborated with other departments to achieve business outcomes. This will illustrate your communication skills and your understanding of the bigger picture.
✨Prepare for Problem-Solving Questions
Expect to face questions that assess your problem-solving abilities. Think of challenges you've encountered in previous roles, especially related to data processing or team management, and how you overcame them. This will help you convey your analytical thinking and resilience.
