Portfolio index

Independent systems record / 03

February 2026–present

Vayro

A pre-launch ride marketplace designed as a ground-up independent system with server-authoritative ride and payment state, geospatial service boundaries, and security controls across mobile, web, API, and data layers.

State
Pre-launch
Authorship
Independent Creator
Spotlight

A current-state engineering record with authorship and maturity kept explicit.

Verified evidence

Résumé QA snapshot · May 2026
600 automated testsThe snapshot spans API, web, admin, and mobile; live-provider validation and marketplace operation remain open pre-launch gates.

Technologies and themes

  • Application security
  • NestJS
  • Next.js
  • Flutter
  • PostgreSQL/PostGIS
  • Redis
  • WebSockets
  • Docker

Authoritative marketplace

A marketplace becomes dependable when identity, fare, location, ride, and payment transitions remain under explicit server authority—and release stays gated until the surrounding system is ready.

Conceptual state-boundary modelIllustrative · not product UI or live telemetry

  1. 01 / State authority

    Keep ride and payment state authoritative at the server

    Vayro places fare negotiation, geospatial service-zone enforcement, real-time chat and location, and auditable ride and payment state machines across mobile, web, API, and data layers. Client surfaces can request a transition; canonical marketplace state remains server-authoritative.

  2. 02 / Access boundary

    Constrain identity, objects, and request volume

    The security design combines Argon2id, short-lived JWTs, hashed refresh-token rotation with reuse detection, role and object-level authorization, Redis-backed rate limiting, and browser security headers. The boundary spans identity, ownership, service-zone eligibility, and abuse resistance rather than ending at sign-in.

  3. 03 / Release boundary

    Treat readiness as a condition of release

    Signed, idempotent Stripe webhook handling, privacy and audit controls, and a May 2026 résumé snapshot of 600 automated tests across API, web, admin, and mobile support the release case. Live-provider validation and marketplace operation remain explicit pre-launch gates—not completed outcomes.