Software Engineer
Speckyfox Technologies · Feb 2026 – Present
- Designed and built an end-to-end multi-vendor marketplace platform using React, TypeScript, Node.js, Express, PostgreSQL, and Sequelize, with separate customer storefront and combined admin/seller dashboards.
- Architected a modular monolith with 11 independently migrating plugins, a typed plugin contract, service registry, and declared dependencies, enabling the marketplace to be configured with different combinations of core and optional modules.
- Implemented a payment-first checkout flow using Stripe Checkout and webhooks, materializing orders only after confirmed payment capture from a frozen pricing snapshot, with idempotent webhook processing, refunds, Stripe Connect seller onboarding, transfers, and payout reconciliation.
- Engineered transactional order and inventory workflows using PostgreSQL transactions, row-level locking, advisory locks, unique constraints, and deterministic lock ordering to prevent overselling and maintain consistency during concurrent checkouts.
- Built core marketplace functionality including product and variant management, inventory, cart, multi-seller order management, seller onboarding, reviews, moderation, wishlist, platform settings, commissions, and payout workflows.

