Selected Engineering Work

Building a consumer SaaS as a solo engineer requires balancing fluid mobile-responsive UX, secure tier-gated subscriptions, resilient data pipelines, and production infrastructure on a lean operational budget.

Engineered an end-to-end architecture: React/TypeScript frontend with zero UI bloat, Go REST microservice on Cloud Run, OpenAI integration for personalized wine recommendations based on tasting history, and hardened Stripe webhook lifecycle handlers.

When upstream general ledger accounts or dimensions changed, refreshing financial models without a clear preview made it hard for finance users to understand what would change before applying updates.

Designed a multi-stage preview pipeline in the UI. Customers can inspect pending GL and account diffs, review added/modified/removed dimensions, and confirm changes before refreshing financial models.

Payroll calculation is unforgiving: an hour shift during Daylight Saving Time transition or miscalculating a blended overtime rate across multiple job roles directly affects employee wages and employer legal compliance.

Spearheaded technical development plans defining strict database access patterns, API contracts, and defensive boundary tests. Implemented robust calculation rules in Go and intuitive calculation verification interfaces in React.

Customers reported that those notifications were missing or arriving late. During peak periods, most notifications did not go through; those that did could arrive 5–30 minutes after the configured threshold. The issue could not be reproduced in lower environments, which did not have production-scale data volume.

Production logs showed out-of-memory errors clustered around common shift start and end times. Rather than raising the process memory limit, the job was changed to paginate in ~10,000-record batches, with additional logging and a Grafana dashboard for failures.

The Real Time Adherence widget re-rendered massive DOM trees on every incoming agent status event, creating perceptible UI freezing of over 2 seconds per event and severely degrading supervisor efficiency.

Used React Profiler to pinpoint cascading re-renders, decoupled volatile websocket state from static table layouts, implemented memoization boundaries, and established comprehensive Cypress end-to-end integration tests in Jenkins CI.