PurchasingPlatform — B2B Procurement SaaS
Feb 2019 – Present
Senior Full-Stack Engineer
Technical leader across a Rails + React/TypeScript procurement platform for seven years; scope grew from feature delivery to platform architecture and cross-team technical leadership. Default reviewer for cross-cutting work and the engineer who set the patterns other teams build on.
Architecture & Frontend Modernization
- Drove the multi-year migration of a jQuery server-rendered Rails monolith to a React/TypeScript single-page app — porting every legacy page (catalog, search, analytics, dashboards, settings, vendors, favorites), introducing the admin/client split, an HMR build pipeline, and chunk-level library deduplication.
- Led major-version upgrades across the core stack — Rails, Ruby, Node, React 16→18, and the Yarn→pnpm migration — each shipped with zero production downtime, keeping the platform on supported runtimes and unblocking downstream teams from incompatible dependencies.
- Re-architected the front-end data layer, replacing legacy class-based stores with server-state caching, query-driven hooks, and URL-synchronized table state — eliminating recurring stale-data and cross-page state-leak bugs.
- Established the org-wide component system and migrated its foundational primitives — tables, modals, pagination, form controls, date pickers, theming — onto a unified, accessible library now used by every product team.
AI, Product & Enterprise Platform
- Designed and shipped an LLM-driven invoice-anomaly categorization pipeline integrated into existing finance workflows, reducing the manual review burden for routine anomalies and setting the template for later AI features.
- Owned the multi-tenant whitelabeling platform — theming, branded emails and PDFs, login/logout flows, and per-tenant feature gating — the foundation that let the company onboard large enterprise customers under their own brand.
- Shipped customer-facing features end-to-end — faceted search with third-party search-engine integration, reorder and frequently-ordered flows, and location-scoped payment methods with owner-permission safeguards.
Reliability & Developer Experience
- Refactored the Sidekiq background-jobs subsystem and large-scale customer-segmentation workers with concurrency-safe locking and partial-failure recovery, reducing recurring job failures and resolving a long-standing on-call incident.
- Built the team's developer-experience foundation — containerized dev environment, Storybook with deploy automation, Cypress E2E and Jest component suites in CI, type-check gates, and the pre-commit lint setup still in use.