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About the Role

We're looking for an experienced BI Developer to join our ATLAS team in London. This is a hands-on, client-facing role within a fast-paced consulting environment. You'll build and improve BI and data solutions, work directly with clients to understand their challenges, and turn evolving requirements into practical, high-quality solutions. You'll work across multiple projects and priorities, so we're looking for someone who combines strong technical capability with confidence, adaptability and ownership.

Responsibilities

• Design, build and enhance BI and data solutions for our clients
• Develop and optimise SQL queries, stored procedures and data models
• Design, build and maintain Tabular semantic models in Power BI and Microsoft Fabric, including DAX calculations, incremental refresh and deployment automation
• Work directly with clients and stakeholders to understand requirements and translate them into effective technical solutions
• Manage delivery across multiple projects and changing priorities
• Investigate data and technical problems and identify practical solutions
• Validate and test data to ensure accuracy, reliability and quality
• Collaborate with consultants, developers and other stakeholders throughout delivery

Requirements

• Strong SQL Server development skills, including T-SQL queries and stored procedures
• Experience developing and maintaining SSAS multidimensional and Tabular models
• Strong working knowledge of DAX
• Good understanding of BI and data warehousing methodologies
• Experience working in a consultancy or client-services delivery environment would be a distinct advantage
• A track record of delivering across multiple concurrent projects or clients
• Familiarity with Azure data services and modern data platform components
• Experience with data validation and testing techniques
• Experience working with Data Vault and Kimball modelling approaches
• Programming or scripting experience would be an advantage
• Applicants must have the legal right to work in the UK for the duration of the fixed-term contract.
• Holland Mountain is unable to provide visa sponsorship, transfers or extensions for this role.

Skills

• SQL Server development
• T-SQL queries
• Stored procedures
• SSAS multidimensional models
• SSAS Tabular models
• DAX
• BI methodologies
• Data warehousing methodologies
• Azure data services
• Modern data platform components
• Data validation
• Data testing
• Data Vault modelling
• Kimball modelling
• Programming
• Scripting
• AI tools in development

Location

• London Bridge

Work Type

• Hybrid - 3 days per week in the office
• Fixed-term contract

Experience Level

• Experienced

About the Company

• We’re a global leader in consulting and data solutions for the Private Markets industry.
• Since 2009, we’ve partnered with Private Capital managers to deliver smarter analytics, seamless integration, and lasting operational excellence through our award-winning ATLAS data platform.
• Winners of The Drawdown’s 2026 PE Service Provider Awards
• Best Advisory / Consultancy
• Best Technology for Data
• Trusted, respected, and growing fast
• Joining Holland Mountain means the opportunity to work on complex, high-impact client challenges, develop your expertise in a specialist and growing business, and help shape how data, technology and emerging tools such as AI are used in practice.
• At Holland Mountain, people are at the heart of everything we do.
• You'll work with talented colleagues, collaborate with some of the biggest names in Private Markets, and have the opportunity to develop your expertise in an environment that values curiosity, innovation and continuous improvement.
• If you're looking for a varied, client-facing role where you can solve complex problems, embrace new technologies and make a real impact as part of a growing, award-winning business, we'd love to hear from you.

Equal Opportunity

• Holland Mountain is committed to providing equal opportunities throughout our recruitment process.
• We welcome applications from candidates of all backgrounds and will assess applicants based on their skills, experience and suitability for the role.
• If you require any reasonable adjustments during the recruitment process, please let us know and we will be happy to discuss how we can support you.