At a Glance
- Tasks: Lead the design and implementation of innovative features in cutting-edge financial applications.
- Company: Join BMLL, a leading provider of market data and analytics with a collaborative culture.
- Benefits: Enjoy a competitive salary, 25 days holiday, and a hybrid working environment.
- Other info: Be part of a dynamic team with excellent career growth opportunities.
- Why this job: Make an impact in FinTech by building industry-leading technology and mentoring junior engineers.
- Qualifications: Proven experience in SaaS development and strong problem-solving skills 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
This is a unique opportunity to build industry-leading technology, drive innovation and influence the direction of our company. The BMLL Lab & Vantage products are the market leading applications for data science and data visualisation on the largest financial datasets. This role involves working in a team of Python & Typescript engineers, alongside the SaaS applications Product Owner. As a senior engineer you will take the lead on design and implementation of new features.
Key Responsibilities
- Partner closely with Product Owner in translating complex requirements into clear, actionable engineering tasks
- Contribute to the application design and development, with effective strategies for testability and product quality
- Ensure the architecture of the system aligns with best practice and meets the goals for scalability, reliability & security
- Provide mentorship to junior engineers
Requirements
- Leadership: Proven experience in designing solutions in a fast‑paced agile environment
- SaaS: Expertise in developing single‑tenant and multi‑tenant B2B SaaS applications with REST APIs and distributed microservices.
- FinTech: Experience in delivering SaaS applications into front‑office capital markets.
- Design: Proficient in architecture design using AWS services such as Cognito, Lambda, Fargate, API Gateway, Terraform
- Data Skills: Experience in data science and financial data visualisation applications in Typescript
- Problem Solving: Strong analytical and troubleshooting skills
- Communication: Excellent communication skills to interact effectively with development teams and product managers
Desirable Skills
- Excellent communication skills, with the ability to communicate fluently with both technical and non-technical audiences
- Experience with data science tools, e.g. one or more of Spark, pandas, DuckDB, DataBricks, Snowflake
- Knowledge of agile development and continuous delivery methodologies
Benefits
- Competitive salary
- 25 days holiday plus
Senior Python Engineer in London 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. As a Senior Python Engineer, you will have the opportunity to lead innovative projects in a fast-paced FinTech setting, while benefiting from mentorship opportunities and a commitment to employee growth. With competitive salaries and a focus on work-life balance, BMLL is dedicated to creating a rewarding workplace for its employees.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Python Engineer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with professionals on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those related to Python and data visualisation. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for interviews by brushing up on your technical skills and understanding the company’s products. Be ready to discuss how your experience aligns with their needs, especially in SaaS and FinTech.
✨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 team at BMLL.
We think you need these skills to ace Senior Python Engineer in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the Senior Python Engineer role. Highlight your experience with SaaS applications, Python, and any relevant FinTech projects. We want to see how your skills align with what we're looking for!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you're passionate about this role and how you can contribute to our team. Don't forget to mention your experience in agile environments and your problem-solving skills.
Showcase Your Projects:If you've worked on any relevant projects, make sure to include them! Whether it's a personal project or something from your previous job, we love seeing practical examples of your work, especially in data science and visualisation.
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 keen on joining our team at BMLL!
How to prepare for a job interview at BMLL
✨Know Your Tech Stack
Make sure you’re well-versed in Python and Typescript, as these are key for the role. Brush up on your knowledge of AWS services and how they relate to architecture design. Being able to discuss your experience with REST APIs and microservices will definitely impress.
✨Understand the Company’s Products
Familiarise yourself with BMLL's Lab & Vantage products. Knowing how they leverage data science and visualisation can help you articulate how you can contribute to their success. This shows genuine interest and helps you connect your skills to their needs.
✨Prepare for Problem-Solving Questions
Expect to tackle some analytical challenges during the interview. Practice explaining your thought process clearly and concisely. Highlight your troubleshooting skills and how you've approached complex problems in past projects.
✨Showcase Your Leadership Skills
As a senior engineer, you’ll be expected to mentor junior team members. Be ready to share examples of how you’ve led projects or guided others in an agile environment. This will demonstrate your capability to take charge and foster collaboration.
