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case studies

Product Engineering Diaries

A growing archive of technical case studies exploring how complex engineering challenges were solved across frontend development, backend systems, infrastructure automation, AI integrations, developer tooling, analytics pipelines, and scalable web application architecture.

Smart Lead Management with Building Bubbles

An in-house WhatsApp CRM that replaced costly third-party tools, cut acquisition cost per student by 20%, and boosted reply speed by 35%. All while giving the team full control over data and workflows.

Scaling Google Docs Delivery for 500+ Students. Without Premium APIs

A workshop system that used Google Drive started failing under scale. I rebuilt it to be resilient, latency-free, and quota-safe, all without buying a Google Workspace subscription.

Bootstrapping a Real-Time Analytics Pipeline Without Breaking the Bank

How I built a custom Express.js + BigQuery data sync system to power investor-ready dashboards, saving ~$700/month in ETL costs and turning raw LMS data into live visual insights.

© 2026 | Rahul Ravindran

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