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Hybrid in London·Added yesterday (last checked 23 Oct)
Our summary
- Salary
- £50,000 - £60,000 a year
About £3,290 - £3,780 a month after tax.
- Work mode
- Hybrid, London
- Contract
- Permanent contract



Skills
Nice to have
Harnham is hiring for this role in several places. This vacancy is in London.
The role
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BI Developer
London/Hybrid
Up To £60,000
This is an excellent opportunity for a BI Developer to join a specialist data consultancy delivering high-impact projects for clients across the private capital and investment sector. You'll work on complex data integration challenges, gain exposure to a variety of client environments, and play a key role in building scalable data solutions that drive business decision-making.
The Company
They are a growing data and technology consultancy that helps investment-focused organisations unlock greater value from their data. Combining advisory expertise with a proprietary data platform, they deliver solutions across reporting, analytics, system integration, and operational efficiency. With an established client base and a strong reputation in their market, they offer a collaborative environment where individuals are encouraged to take ownership and develop their technical expertise.
The Role
As a BI Developer, you will work closely with analysts, developers, and client stakeholders to design and deliver robust data solutions.
Key responsibilities include:
- Building and maintaining ETL pipelines across a range of client environments
- Developing, optimising, and supporting complex T-SQL solutions
- Designing and enhancing semantic, tabular, and dimensional data models
- Supporting data warehousing initiatives and reporting capabilities
- Developing and maintaining DAX calculations and analytical models
- Troubleshooting data issues and resolving technical challenges
- Collaborating with analysts to translate business requirements into technical solutions
- Working directly with client data environments and contributing to solution design
- Supporting the delivery of data integration projects across varying architectures and technology stacks
- Managing changing priorities while maintaining high-quality delivery
Your Skills & Experience
You will ideally have:
- Strong commercial experience with SQL, preferably T-SQL
- Experience designing and building ETL pipelines
- SQL Server development experience
- Strong understanding of data warehousing principles
- Experience with dimensional modelling, including concepts such as star schema, semantic models, tabular models, and Kimball methodologies
- Exposure to DAX and analytical modelling
- Experience working across complex data environments
- Strong stakeholder communication skills and the ability to work with evolving requirements
- Experience within a consultancy or project-based environment, or evidence of delivering multiple concurrent initiatives in a fast-paced setting
- Python experience would be advantageous but is not essential
What They Offer
- £50,000 - £60,000 base salary
- Hybrid working model with three days per week in the London office
- Fixed-term contract with strong potential for longer-term opportunities
- Exposure to leading organisations within the private capital and investment space
- Opportunity to work with modern data technologies and proprietary platforms
- Varied, project-driven work across different client environments
- Investment in professional development, training, and certifications
- A collaborative culture that values autonomy, ownership, and continuous learning
How to Apply
If you're a BI Developer with strong SQL, ETL, and data modelling expertise looking to broaden your experience within a specialist consultancy environment, please apply with your CV to be considered.