Full Stack Developer

Duties & Responsibilities
Role Summary
The Full Stack Developer reviews, repairs, and maintains the web application our team and our clients
rely on every day. The role begins with a focused review — a clear, prioritized picture of what is broken,
risky, or slow — and then works through that list with us, most important first. Our app connects to our
clients' QuickBooks Online accounts and turns their accounting data into CFO-level reports and
dashboards, so accuracy, reliability, and security are the heart of the job.

Key Responsibilities

Application Review & Assessment

- Review the codebase (Python/FastAPI backend and a large single-file JavaScript frontend) and produce a short, prioritized report of what is broken, risky, or slow.

- Flag security and data-integrity concerns clearly, with recommended fixes ranked by importance.

- Give honest estimates of effort so leaders can d ---------- what to tackle first.

Bug Fixes & Application Maintenance

- Fix bugs across the app — data accuracy, syncing, and the user interface. Improve the reliability and accuracy of the QuickBooks Online data sync.

- Harden security and improve performance.

- Keep the app stable and deployable while changes are being made.

Testing & Documentation

- Write and maintain automated end-to-end tests (Playwright) so fixes stay fixed.

- Document what changed and why, so the work is easy to pick up later.

Maintain clear technical notes and documentation.



Technical Environment Backend:

Python 3.11, FastAPI, raw SQL Database: PostgreSQL Frontend: one large single-file vanilla JavaScript app (no framework, no build step) Integrations: QuickBooks Online API (OAuth2) Hosting / deploy: Railway (push to GitHub = deploy) Testing: Playwright (end-to-end)