Sebastian Callender

Strategic finance leader building scalable financial data and reporting infrastructure within regulated, high-growth fintech and global technology environments. Strong background in FP&A, balance sheet analytics, revenue modelling, compliance reporting, and operational cost optimization. Experienced partnering with CFO, COO, and VP-level stakeholders to improve decision-making, strengthen financial controls, and enhance KPI visibility across Product, Treasury, Marketing, and Operations.

Combines advanced financial modelling with modern data engineering tools (SQL, dbt, AWS, BI) to deliver scalable, automation-driven finance systems.

Finance Analytics Manager at TapTap Send (2025-09 – Present)

Lead financial data modelling across revenue, balance sheet, compliance, MEC, and marketing analytics within a regulated cross-border payments business.

• Designed and governed analytics-ready financial data models (SQL + dbt + Redshift), creating scalable revenue, CAC, and compliance reporting infrastructure across FCA regulated business.
• Owned balance sheet analytics and reconciliation modelling, resolving 92% of historical variances for reversals and delivering traceable drivers across $300M+ AvE movements.
• Designed executive KPI architecture replacing fragmented reporting, reducing ingestion time by 87% and enabling near real-time capital allocation, treasury and product decision support.
• Acted as SME for UAE compliance analytics, partnering with the COO and MLRO to design customer risk models supporting regulatory approval and ongoing monitoring.
• Led financial data integration for Apple Pay launch [Card Launch SME], ensuring regulatory reporting accuracy and partner compliance.
• Increased Day 2 reconciliation coverage from 22% to 72%, materially strengthening financial control environment and audit readiness.

Sr. Finance Analyst at Amazon (2024-11 – 2025-09)

Head of EU TPH (Productivity) Data & Analytics – Owned EU productivity and variable cost financial analytics across 26 regional sort centers, directly supporting Regional Directors and CFO-level performance reviews.

• EU ATS Weekly Business Review Lead – Led EU Weekly Business Review (WBR) analytics, partnering with FP&A to improve performance vs financial plan and present variance drivers to CFO-level stakeholders.
• EU ATS MEC Lead – reduced EU MEC data ingestion timelines by 40% through automation and metric standardisation, improving reporting accuracy and CFO-level insight delivery.
• EU ATS Peak Captain (High Volume Events) – led cross-business unit finance coordination during high volume events, delivering intra-day visibility to 26 sort centers for AVS VP level, and helped identify cost initiatives forecasted to save $0.03/per package.

Category Lead – Camera, Home Entertainment & Luggage at Amazon (2024-09 – 2024-11)

Oversaw growth for 3 core GLs on a short-term assignment, leading selection growth (selection +8.6% QoQ) whilst ensuring development of portfolio via effective P&L management for sustainable growth.

• Created ZA Retail Q4 Strategy for Deals, including Finance calculations for phased targets, allowing for improvement of deal selection for South African consumers, exceeding topline deals targets by +104% for my managed categories.

Senior Strategic Account Manager – EU Fashion at Amazon (2024-06 – 2024-09)

Led EU9 Softlines Deal Selection strategy and operated as SME for Apparel Deals, performing data analysis for Head of Marquee Events to drive topline growth and reduce cost-to-serve achieving YoY growth in all events T12M.

• Core selection coverage improvement +780bps YoY, with bottom-line improving +223bps YoY.
• KAM for +£30MM GMS entitlement vendor (managing additional Brand Specialist), delivering YoY growth above industry benchmark, and generating an ROI on investment of 7.8x.

Strategic Account Manager at Amazon (2022-06 – 2024-05)

Account manager for a Top-5 EU GMS, developing financial dashboards to drive insights into core KPI's via more efficient stock management strategies.

Large Corporates Intern – Commercial Banking at HSBC (2021-06 – 2021-09)

Supported relationship managers in servicing large corporate clients, assisting with credit analysis, financial modelling, and portfolio performance reviews.

• Conducted market and industry research to support lending decisions and identify growth opportunities across key corporate sectors.

Bachelors in Economics, Politics & International Relations – University of Warwick (2019-09 – 2022-06)