OnetoOne Personnel

£55K to £60K Central London Mon - Fri 9am to 5:30pm Office Based Join a globally recognised group company with a portfolio of reputable international brands as a Senior BI Developer based in London. This is an exciting opportunity for an experienced BI professional to lead enterprise-level Power BI architecture, ERP data integration, and business-critical reporting solutions across multiple functions. We are seeking a highly skilled candidate with 10+ years' experience in Power BI development, advanced SQL Server expertise, strong ERP and ETL knowledge and proven experience building scalable semantic models and data infrastructure. The ideal candidate will combine strong technical capability with excellent problem-solving, communication, and stakeholder management skills. Due to the technical nature of this role, applications will only be considered from candidates who meet the essential experience and technical requirements listed. Essential Skills and Experience 5 plus years UK based BI experience 10+ years in Power BI development with strong backend/data engineering focus. Advanced SQL Server expertise, including query optimisation, views, stored procedures, and performance tuning. Strong experience managing ERP data structures and integrations. Experience building and managing semantic models and enterprise datasets in Power BI. Strong knowledge of ETL processes, data transformation, and data modelling principles. Advanced DAX development and optimisation experience. Experience with Power BI gateways, dataflows, workspace management, and deployment pipelines. Strong understanding of BI governance, security models, version control, and documentation standards. Excellent troubleshooting and problem-solving skills. Advanced Excel and PowerPoint skills; experience working with ERP systems and large datasets. Strong communicator, good presentation skills, cross functional collaborator, detail oriented and able to deliver strategic insights. Key Roles and Responsibilities Power BI Architecture & Data Infrastructure Own and manage the end-to-end Power BI environment, including datasets, semantic models, gateways, dataflows, and reporting infrastructure. Design, build, and maintain scalable Power BI data models that support enterprise-wide reporting and analytics. Develop and manage ODBC connections and integrations between ERP systems, SQL Server databases, and Power BI environments. Control, optimise, and maintain SQL queries, stored procedures, and backend logic feeding the Power BI semantic layer. Ensure data models are performant, scalable, maintainable, and aligned with evolving business requirements. ERP Data Management & ETL Ownership Manage ERP data extraction processes and ensure reliable movement of data into reporting environments. Design and maintain ETL processes, data transformation pipelines, and data validation procedures. Develop robust data cleansing, mapping, and transformation logic to ensure data accuracy and consistency across systems. Troubleshoot and resolve data integrity, refresh, connectivity, and performance issues across the BI stack. Work closely with internal stakeholders to understand ERP structures, business logic, and reporting dependencies. SQL Development & Semantic Model Management Write, optimise, and maintain complex SQL queries and views supporting reporting and analytics. Build and manage enterprise semantic models within Power BI, ensuring consistency in KPI definitions and business logic. Develop and maintain advanced DAX calculations, measures, and performance optimisation strategies. Implement incremental refresh, partitioning, and other best-practice optimisation techniques where appropriate. BI Governance, Security & Best Practices Establish and maintain standards for BI governance, documentation, version control, testing, and deployment. Manage user access, row-level security, workspace structure, and data governance policies. Ensure reporting environments follow best practices for scalability, maintainability, and auditability. Create technical documentation covering data models, ETL processes, SQL logic, and reporting architecture. Reporting & Business Intelligence Support Support and enhance reporting capabilities across Sales, Operations, Finance, and Supply Chain teams. Partner with business stakeholders to translate reporting requirements into scalable technical solutions. Work alongside front-end dashboard/report developers to ensure reliable and efficient backend data delivery. Provide technical leadership and act as the internal subject matter expert for Power BI infrastructure and BI data architecture. What's in It for You? £55,000 to £60,000 per annum (depending on qualifications & experience) 25 days of annual leave + bank holidays Additional days holiday between Christmas and New Year if the Directors decide to close the business Standard working hours 9 to 5:30 - 30 min lunch = 40 hours a week 1-day WFH after probation and training at the company's sole discretion (non-contractual) Workplace Pension Scheme 60% Discount on our products that we have on Ecommerce Sample sales 2+ times a year Short Leave - with pre-approval from Line Manager to take up to 2 hours off without deduction from holiday allowance Statutory sick pay Annual pay review and/or bonus at the Directors discretion If you have all the essential requirements and are ready for your next challenge, contact Louise at 121 Personnel

1st & 2nd Line IT Support Engineer Permanent £35k - £38k PA Brentwood Mon-Fri 9am -5pm We are currently recruiting for an experienced 1st & 2nd Line IT Support Engineer to join a well-established organisation supporting a multi-site IT environment. This is an excellent opportunity for a technically capable IT professional with experience across Microsoft technologies, virtualisation, and end user support. Key Responsibilities: Provide 1st and 2nd line IT support to users across the business Support and maintain Windows Server environments (2012 R2 through to 2025) Install, configure and support Windows 11 desktop environments Administer and maintain Active Directory and Microsoft Exchange Manage user accounts, permissions, and access to confidential data Support VMware virtualised infrastructure environments Configure, deploy and troubleshoot hardware and software Maintain endpoint devices including desktops, laptops, mobile devices, and printers Support enterprise messaging and unified communications systems Assist in maintaining backups, documentation, and core server infrastructure Ensure IT incidents and service requests are resolved efficiently Provide remote support to additional offices and travel between sites when required Deliver occasional out of hours and weekend support cover Support and maintain telephony systems including Mitel Assist with ongoing IT improvement projects and system upgrades Candidate Requirements: Previous experience within a 1st/2nd Line Support, IT Support Engineer, or Infrastructure Support role Strong troubleshooting and problem-solving skills Experience supporting both physical and virtual environments Good understanding of Microsoft server and desktop technologies Experience with Active Directory and user administration Excellent communication and customer service skills Ability to manage and prioritise workloads effectively Strong attention to detail and documentation skills Flexible approach with willingness to support multiple locations when required Job Details: Monday to Friday - 9am to 5pm (fully onsite) Car owner/Driver Company Pension/Life Assurance Staff Car Parking Holidays 33 inc Bank holidays This is an excellent opportunity for an experienced IT support professional looking to further develop their experience within a busy and technically diverse environment. Please contact Julie Paton or Aimee Page at One to One Personnel for further job details.