At Kantox, we are looking for a Senior Business Controller to join our Finance team and play a key role in monitoring and optimising our commercial performance.

We’re seeking an analytical and detail-oriented finance professional who thrives in a fast-paced environment and enjoys working close to the numbers. This role is focused on accurate reporting, analysing revenue and margin data in depth, and providing insights that support business planning and decision-making.
You will report to the Senior Controlling Manager, work closely with Sales and Customer Success, and act as a business partner to the Chief Commercial Officer (CCO). You will lead the preparation of the monthly revenue deck and present it to top management. The role will also take part in the development of a new revenue forecasting model, collaborating with Tech and Product teams to enhance accuracy and scalability.

About the Team

You’ll be part of a small but high-impact Finance team based in Barcelona. Your mission is to ensure commercial performance is accurately planned, tracked, analysed, and reported to the business and the Group.

We are detail-oriented, collaborative, and committed to continuous improvement. The role places a strong emphasis on data accuracy, commercial reporting, and insight generation to support the wider business with reliable financial information. You will contribute to budgeting, forecasting, and commercial analysis — calculating SaaS metrics, explaining revenue deviations and drivers, challenging assumptions, identifying opportunities, and driving projects that improve processes and help scale the finance function.

Your mission within Kantox

Budgeting & Forecasting

Participate in the annual budget cycle and rolling forecasts with a strong focus on revenue. Collaborate with Sales and Customer Success teams to ensure forecasts reflect business realities. Challenge assumptions where necessary and help prepare presentations for internal stakeholders and Group reporting.

Commercial Performance Analysis & Reporting

Ensure revenue data is accurate and properly reflected in the financial ERP. Perform variance analysis against budget and prior periods, delivering clear explanations of deviations and performance drivers. Lead the preparation and presentation of the monthly revenue reporting deck to senior leadership. Calculate and monitor key SaaS performance metrics, including ARR, churn, LTV, CAC, and net revenue retention.

Business Partnering & Commercial Support

Act as a finance partner to Sales and Customer Success teams. Support the CCO with financial insights, performance tracking, and ad hoc analysis. Oversee the calculation of sales commissions and commercial bonuses, ensuring accuracy and alignment with policy.

Financial Modelling & Business Cases

Build financial models and prepare business cases for commercial initiatives and customer strategies. Provide insight to support data-driven decisions and profitability optimisation.

Process & Systems Improvement

Contribute to projects that enhance forecasting accuracy, reporting efficiency, and commercial data quality. Collaborate with Tech, Product, and external consultants to support system and process improvements. Lead the development of a new revenue forecasting model and support future BI tool integrations.