Systems Engineering Portfolio
A comprehensive catalog of transactional APIs, database architectures, microservice structures, and developer libraries built to scale performance and secure business workflows.
Enterprise POS-Linked Virtual E-Gift Card Engine
Private Internal SystemDesigned a virtual gift card ledger system operating entirely independent of public payment gateways. Supports 4 tenant roles handling in-store balance updates, offline POS transaction approvals, and automated balance checks.
Fargtryckarn: High-Capacity Print-on-Demand E-Commerce Backend
View Production SiteDeveloped the complex backend print sizing, pricing matrix engine, and file upload validation layers for a massive printing company established in 1999.
Morp (The Prom App): Multi-Tenant Event & Ticketing Backend
View Morp PlatformArchitected the central transaction and ticket distribution system. Scaled custom access roles for administrators and teachers to safely publish ticket inventories with Stripe webhook escrow synchronization.
Sync Zone: Multi-Timezone Meeting Coordinator
View Production PlatformEngineered a standalone timezone coordination scheduler targeting independent contractors. Built entirely on client-side IndexedDB layers.
dj-all-auth: Plug-and-Play Django OAuth2 Federation
View on PyPICreated a unified Django auth library compilation linking standard user settings with federated social platforms (Google, Discord, Steam OpenID).
Fr-easy: Hierarchical Multi-Tenant Fundraising Pipeline
Corporate RestrictedArchitected the database schemas and routing checks for 11 dynamic hierarchical roles, syncing volunteer communications across major regional offices.
Kalaty: Legacy Enterprise Rug E-Commerce Migration
View Production SiteRebuilt and migrated a complex, database-heavy legacy PHP5 custom site into a secure, modern Yii2 application for Kalaty. Restructured relational schemas.
Justify: Unified Backend Validation Form Mapper
View RepositoryDeveloped an agnostic validation layer mapping client form responses directly to native server constraints, preventing dual-writing validation code schemas.
Post Sea Maritime Course Registration Backend
System InternalRebuilt the registration queues for a maritime training institute training center. Added checksum validation with CCAvenue Payment Gateways.
@deviser/notify: Lightweight Popup Engine
View on npmBuilt a vanilla JS notifications wrapper to display transient alerts, warnings, and messages with zero dependencies and a lightweight 2.5KB footprint.
synkn.app: High-Speed JAMstack Portal
Visit synkn.appDesigned a custom, high-speed JAMstack static-generated portal using Eleventy (11ty) layout nodes. Renders with absolute minimal CSS weight.
Ready to secure and optimize your backend systems?
I consult directly with product owners to solve database scaling limits, implement secure payment webhooks, and streamline internal APIs.