Senior Power BI and Data Science Specialist

Senior Power BI & Data Science Specialist

ROLE PROFILE 

The GIM Dashboard Team designs, delivers, and maintains advanced Power BI dashboards that provide deep insights into Group Investment Management’s project and portfolio performance, primarily sourced from Clarity and enterprise data platforms. These dashboards are widely used across LSEG by business managers, portfolio leads, project and programme managers, and senior executives. Reporting to the GIM Dashboards Owner, the Senior Dashboard Developer plays a key role in shaping high‑visibility reporting products that support strategic decision‑making at scale. 

ROLE SUMMARY 

The Senior Dashboard Developer is responsible for building intuitive, scalable, and visually consistent Power BI dashboards to support project and programme delivery and executive decision-making. They will participate in briefing sessions, build prototypes and mock-ups, and refine them into production‑ready dashboards supported by strong data modelling and performance optimisation. Success requires technical depth in BI development, strong analytical thinking, stakeholder engagement skills, and the ability to work efficiently in a fast‑moving environment. 

WHAT YOU'LL BE DOING 

• Design, build, and maintain enterprise‑grade Power BI dashboards used across GIM and broader LSEG leadership. 

• Utilize data science capabilities to inform, improve and optimize data models and dashboard construction. 

• Engage with stakeholders to understand business requirements and produce prototypes (mock-ups, spreadsheets, initial PBIX models). 

• Collaborate with the Data Engineering team to integrate data from the data warehouse, OneLake, or Snowflake. 

• Build robust data models, DAX measures, and efficient transformations using Power Query (M). 

• Develop ETL scripts to ingest and structure data for reporting, including support for modern pipelines (e.g., Fabric Dataflows Gen2, Databricks, PySpark). 

• Optimise Power BI dashboards for high performance, usability, and maintainability. 

• Ensure dashboard UX follows the established style guide and aligns with the GIM reporting framework. 

• Conduct unit testing, peer reviews, support SIT/UAT, and ensure defect resolution. 

• Produce essential documentation: Design Specs, User Guides, Release Notes, and Process Docs. 

• Contribute to improvements in development standards, Agile practices, and Jira processes. 

• Identify data issues or process inefficiencies and contribute to resolution. 

• Support the adoption of Q&A, AI features, and advanced analytics in dashboards where applicable. 

WHAT YOU'LL BRING 

Essential Skills & Experience 

• 2+ years hands‑on Power BI development. 

• Advanced SQL (T‑SQL/ANSI SQL) and strong DAX expertise. 

• Proven experience with Power Query (M), data modelling, and performance optimization. 

• Experience with enterprise programme management / PPM tools such as Clarity, Planview, Asana, and JIRA.   

• Experience implementing Row Level Security (RLS). 

• Strong understanding of data flows from data warehouse to UI. 

• Proficiency with Python or R, with experience in libraries such as scikit-learn, TensorFlow, or similar.  

• Experience of LLM prompt engineering for systematic feature extraction from unstructured data.   

• Hands‑on experience with ETL processes and tools. 

• Experience with source control (Git). 

• Strong analytical skills and ability to identify patterns and insights in data. 

• Skilled in requirements analysis, designing specifications, testing, and documentation. 

• Excellent communication skills (written & verbal). 

Key Behaviors 

• Thrives in rapidly evolving environments with shifting priorities. 

• Collaborative team player—supportive, flexible, proactive, and accountable. 

• Highly organised, self‑disciplined, and detail‑focused. 

• Strong eye for dashboard design, usability, and accessibility. 

• Excellent stakeholder relationship management. 

• Proactive and able to work with minimal supervision. 

• Meets strict deadlines and manages workload effectively. 

• Flexibility to work aligned with UK business hours. 

Nice to Have (Technical Skills & Experience) 

• Experience with OneLake/Snowflake, Microsoft Fabric, Lakehouse, or Dataflows Gen2. 

• Experience with SQL optimisation and modelling. 

• Experience with KQL for Log Analytics or Fabric monitoring. 

• Familiarity with advanced Power BI features such as AI visuals or Q&A. 

• Degree in a numerate discipline (Statistics, Math, Physics, Engineering, Data Science, Computer Science). 

 

WHAT YOU’LL GET IN RETURN 

This role gives you the opportunity to influence some of the most widely used dashboards in LSEG, directly supporting GIM leadership and global business decision‑making. You'll work with Microsoft Fabric, OneLake, and modern BI technologies, expanding your expertise while contributing to high‑impact reporting solutions. We recognise that flexibility attracts the best talent. We are open to discussing work arrangements, and this role follows a Blended (Hybrid) model. 

Purpose and Values 

Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our values guide our actions every day: 

• Integrity – We honour commitments and build trust. 

• Partnership – We succeed by collaborating. 

• Innovation – We nurture new ideas and embrace change. 

• Excellence – We hold ourselves to the highest standards. 

Career Stage:

Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Experience Level

Senior Level