PolarityDigital

I took over a complex analytics SaaS and led a comprehensive frontend and backend revamp.

I rewrote React/Node.js components, built and refined advanced formula parsing, improved Highcharts performance, secured paid API access, and built data administration and provider workflows.

I also strengthened Stripe billing with durable webhook idempotency and migrated Python calculations into Node.js.

The client reported roughly 5× faster chart loading.

The platform served 431 active subscribers.

Stack: React, TypeScript, Highcharts, Node.js, PostgreSQL, Sequelize, Auth0, Stripe, Vercel.