Technical notes
Write-ups with diagrams
Architecture write-ups with diagrams — when you want the how, not just the bullet. Project demos and case studies live under Projects.
Confidential / NDA
Seller onboarding and product variants
Shop applications on existing accounts, category attributes, and up to two variant axes with per-variant price and stock.
Confidential / NDA
Cart and stock reservation
A shared cart that checks availability on add, and holds stock only when the buyer opens the checkout summary.
Confidential / NDA
Cancel vs a late or duplicate payment confirmation
One locked mark-paid path so cancel, a late confirmation, and a background check end in one state.
Confidential / NDA
Order lifecycle and refunds
One child order per seller under a shared payment, with idempotent refunds and a buffer before seller income.
Illustrative
Multi-level revenue splits with a dry-run preview
Percent-plus-fixed splits down a partner chain. Preview and settle call the same function.
Illustrative
One interface for many third-party APIs
A registry of adapters for different auth, payloads, and status names, including an explicit pending flag.
Illustrative
Making background job failures visible and safe to retry
Claim a row before calling out, record the stage and last error, and retry without sending twice.
Confidential / NDA
Flexible Financial Settlement Engine
Enterprise CRM: shopping-cart batches, consolidated payment vouchers, and commission state design.
Team practice
Frontend Architecture Refactoring
Unified dynamic forms, shared component library, and RBAC across admin and agent portals.
Confidential / NDA
360° Performance Evaluation Module
Full-stack 360° HR: generation engine, JSONB, tokenized partner API, and Angular schema-driven forms with responsive Likert layouts.
Reflection
Full-Stack Assessment: Performance & Live Debugging
Take-home and live session: concurrent API aggregation, SWR + infinite scroll, a merge-order bug, and a clear follow-up.