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jay-inventor007/README.md

Hi, I'm Jesse Uwodi 👋

I am a Product Design Engineer who builds complete, high-reliability software end to end — interfaces, databases, backend services, and AI systems — with zero handoff friction for fast-moving remote teams.

🚀 Featured Engineering Projects

  • MarkMD — Solo-built medical exam platform with multi-tier Paystack billing, handwritten answer evaluation, and live spoken oral examinations.
  • Zero-Trust Records Vault — PostgreSQL multi-tenant isolation engine strictly enforced by Row-Level Security (RLS).
  • Paystack Subscription Engine — SaaS billing engine with webhook signature verification and idempotent audit ledgers.
  • Cognoscope Instrument — Adaptive cognitive-training telemetry instrument styled as a clinical bedside monitor with Canvas waveforms.

🛠️ Core Engineering Stack

  • Mobile & Frontend: React Native, Expo, React, TypeScript, Tailwind CSS, shadcn/ui, Reanimated, FlashList, TanStack Query, Zustand
  • Backend & Data: Node.js, Supabase, PostgreSQL (RLS, keyset pagination, indexing), Redis, BullMQ, REST / BFF
  • Systems & AI: pgvector, RAG pipelines, Paystack / Webhooks, Canvas API, Vitest, k6 Load Testing

Available for remote Product Engineering and Design Engineering roles.

Pinned Loading

  1. cognoscope-instrument cognoscope-instrument Public

    COGNOSCOPE: Adaptive cognitive-training telemetry instrument styled as a clinical bedside monitor. Built with React, TypeScript, Vite PWA, and Canvas waveforms.

    TypeScript

  2. lagos-property-listings-engine lagos-property-listings-engine Public

    High-performance Nigerian real estate search API with keyset cursor pagination, in-memory IP rate limiting, and PostgreSQL full-text search.

    TypeScript

  3. lagos-ride-hailing-core lagos-ride-hailing-core Public

    Distributed ride-hailing API specification and PostgreSQL state machine engine with geo-fencing, idempotency, and concurrency invariants.

    PLpgSQL

  4. paystack-subscription-engine paystack-subscription-engine Public

    SaaS subscription and billing engine integrated with Paystack: tiered plans, webhook signature verification, and append-only payment audits.

    TypeScript

  5. pg-queue-worker pg-queue-worker Public

    Resilient PostgreSQL-backed background job queue with atomic SKIP LOCKED claims, exponential backoff retries, and PDF flyer rendering.

    TypeScript

  6. zero-trust-records-vault zero-trust-records-vault Public

    Multi-tenant zero-trust records engine enforced with PostgreSQL Row-Level Security (RLS), query isolation audits, and tamper-proof access control.

    TypeScript