Data import pipeline for Clearledger
A CSV and Excel importer with column mapping, validation and background processing. A case study by Noah Fischer, Full-Stack Developer (Next.js & Supabase).
Challenge
New customers of Clearledger, an accounting platform, had to send their data to support for manual import. Onboarding took two weeks and imports often failed on bad dates or duplicates.
Solution
I built a self-serve importer: upload, automatic column mapping, row-level validation with clear error messages, preview, and background processing that handles files with 200,000 rows.