Power BI Developer

The role:

We are seeking a talented and motivated Power BI Developer to join our Financial Planning & Analysis (FP&A) team in London. In this mid-level role, you will be responsible for designing, developing, and maintaining interactive dashboards and reports that provide the finance community with clear, accurate, and timely insights to support strategic and operational decision-making.

You will work closely with stakeholders across the firm — from finance business partners to senior leadership — translating business requirements into robust and visually compelling reporting solutions. Strong analytical thinking, meticulous attention to detail, and the ability to engage confidently with colleagues at all levels of seniority will be key to your success in this role.

What will you do:

• Design, develop, and deploy Power BI dashboards and reports tailored to the needs of the finance community, including FP&A, management accounting, and senior leadership.

• Engage directly with finance stakeholders to gather, analyse, and document business and reporting requirements, applying strong business analyst skills throughout.

• Translate complex financial data into clear, user-friendly visualisations that drive insight and support decision-making.

• Conduct thorough testing of all reports and dashboards prior to release, ensuring data accuracy, consistency, and alignment with agreed requirements.

• Manage the full lifecycle of reporting development, from initial scoping and design through to delivery, sign-off, and ongoing maintenance.

• Proactively identify opportunities to improve existing reports, streamline data models, and enhance the overall reporting infrastructure.

• Communicate effectively with stakeholders at varying levels of seniority, adapting your style accordingly — from technical discussions with IT teams to executive-level presentations.

• Maintain clear and up-to-date documentation for all reports, data sources, and development processes.

• Support the broader FP&A team with ad-hoc data analysis and reporting requests as required.

What we are looking for:

Essential Skills & Experience

• Proven experience developing and maintaining Power BI reports and dashboards in a professional environment.

• Strong business analyst capabilities, including requirements gathering, process mapping, and translating business needs into technical solutions.

• Excellent attention to detail with a rigorous approach to testing, data validation, and quality assurance before deployment.

• Ability to work with multiple stakeholders simultaneously, managing competing priorities and deadlines effectively.

• Solid understanding of financial data, reporting concepts, and FP&A processes (e.g. budgeting, forecasting, variance analysis).

• Confident communicator, comfortable presenting and discussing work with audiences ranging from analysts to senior leadership.

• Proficiency in data modelling, data transformation, and connecting Power BI to various data sources (e.g. SQL, Excel, ERP systems).

• Strong analytical and problem-solving skills with a proactive, solutions-oriented mindset.

Desirable Skills & Experience

The following are not requirements for this role but would be considered advantageous:

• Knowledge of DAX (Data Analysis Expressions) for creating calculated columns, measures, and KPIs within Power BI.

• Previous experience working within a law firm or professional services environment, with an understanding of the associated financial reporting landscape.

• Familiarity with Power Query (M language) for advanced data transformation.

• Experience working with financial systems such as Elite 3E, Aderant, or SAP.

• Exposure to other BI or analytics tools (e.g. Tableau, Qlik, or SQL Server Reporting Services).

Personal Attributes

• Highly organised with strong time management skills and the ability to prioritise effectively in a fast-paced environment.

• Collaborative team player who builds positive working relationships across the business.

• Inquisitive and self-motivated, with a genuine interest in data and financial analysis.

• Professional and composed when dealing with senior stakeholders, with the confidence to challenge requirements constructively where appropriate.

• Committed to continuous improvement and keeping up to date with developments in Power BI and the broader Microsoft data ecosystem.

Career Level:

The career level assigned to this role is level 4. The career level framework provides a formal structure for the business services functions at the firm. The framework, which ranges from level 1 to level 7, clearly defines the responsibilities, skills and competencies required at each level.

Here at Simmons & Simmons:

At Simmons, we are proud of our collaborative, open and non-hierarchical culture, where everyone is treated with respect and dignity and the wellbeing of our people is paramount. Our dynamic minds work as one integrated team, partnering with leading organisations on inspirational and thought-provoking projects that matter. From day one, irrespective of job title, qualification or background, everyone’s voice is heard, and you are encouraged to have an enquiring mind and share ideas that drive the firm forward. Through innovative learning and development opportunities, you will have a platform to excel, exceed your career ambitions, and achieve things you never thought possible.

Some key information:

• We offer a competitive package including bonuses dependant on role/level, private medical insurance and pension contribution.

• Our global skills academy provides our people, regardless of their role and location, with excellent learning opportunities (including live workshops, podcasts, short videos and practical learning experiences).

• We have adopted a hybrid working approach with a requirement for a minimum of three days in the office with flexibility dependant on role/team/client demands.

• We are proud to rank as a Times Top 50 Employer for Gender Equality, a Stonewall Top Global Employer, and a Top 75 Employer for Social Mobility.

• We have a range of social and sports committees, summer and winter parties and monthly get togethers.

• We have a range of diversity networks to connect people and celebrate our differences which is integral to our inclusive culture.

• All UK offices have their own artwork collections – including Damien Hirst and Tracey Emin pieces in the London office. We have a long-standing history in supporting the art community especially up-and-coming artists.

• We have recently introduced a Strategic Advisory Council which is a mix of associates and business services who will propose strategic initiatives that align with our firm's mission and support the delivery of our business plan, shaping the future of our next-generation law firm.

• Our in-house generative AI tool, Percy, won the ‘Innovation in Automation and AI Tools’ category at the 2024 FT Innovative Lawyers Europe Awards. This achievement highlights our commitment to technological innovation and client service.

• We have been commended in The Times Best Law Firms 2026 across three categories: construction, employment, and intellectual property. Our profile is highly positive, highlighting our sector specialisms and notable case and transactional work.

Equal opportunities:

We are committed to fostering equality, diversity and inclusion within our firm and to ensuring equal employment opportunities. We believe that this commitment creates a vibrant and rewarding work environment. We are therefore committed to:

• Upholding equal opportunities, regardless of race, ethnicity, religion, belief, age, disability, sexual orientation, sex, gender reassignment, gender identity, marital status, or pregnancy, including maternity and paternity. This commitment extends to addressing any instances of perceived or associative discrimination and harassment. We also ensure fair treatment during recruitment and selection processes for those who are serving or have served in the armed forces, along with their families.

• Accommodating requests for flexible working arrangements whenever possible. We encourage you to discuss your needs with us if this is something you require.

• Making our roles accessible to individuals with diverse abilities. If you need any reasonable adjustments during the recruitment process, please let us know so we can meet your needs.

• We offer a range of employee networks to support our colleagues. More information about these networks can be found in the D&I Information booklet that candidates are sent when invited to interview.

We encourage you to apply even if you don't meet every single requirement. We are looking for individuals who are passionate and eager to learn and grow with us. Your unique experiences and perspectives could be a great addition to our team.

We reserve the right to close this vacancy early if we receive sufficient applications for the role. Therefore, if you are interested, please submit your application as early as possible.

If you’re interested in finding out more about this position, please contact the Recruitment Team. To apply for the role, click on the link at the top of the page or visit our careers page for more details.