Denni Serra

About me

I provide digital document and spreadsheet services: Excel and Google Sheets data cleaning, structured CSV files, PDF/Word conversion, editable trackers, KPI dashboards, and repeatable administrative workflows. I also build research databases from public sources, with source references, deduplication, consistent fields, and quality checks. I clarify scope, deliverables, timelines, and acceptance criteria before work begins. I use automation when appropriate and personally verify results before delivery. Portfolio samples are identified as internal projects or demonstrations, not paid client commissions. I work remotely from Portugal and communicate in English and Portuguese. I do not send unsolicited mass messages or gather private personal data.