Parsa Pooresmaeili

High-Performance Full-Stack & Web Systems Engineer

Isfahan, Iran (UTC+3:30)

Open to Remote (Part-Time / Contract)

Email: parsapursmaili@gmail.com•Portfolio: parsadevstudio.ir•GitHub: github.com/parsastudio

Production Software Development

2024 – Present

Independent Full-Stack & Web Systems Engineer

Architected, deployed, and actively operate 6 production-grade web systems across isolated subdomains, enforcing strict hexagonal boundaries, atomic database concurrency, and sub-millisecond execution paths.

Technical Core & Architecture

Web & UI Architecture:Next.js 16 (App Router), React 19, TypeScript, Tailwind CSS v4, Core Web Vitals, Clean Architecture
Browser Systems & Graphics:WebGL2 (GLSL Shaders), Web Crypto API (AES-GCM / PBKDF2), Web Locks API, Web Audio API, Dexie.js (IndexedDB)
Data & Concurrency Backend:PostgreSQL (SELECT FOR UPDATE row locks), Drizzle ORM, Prisma, Upstash Redis, Next.js Server Actions, REST / Edge

Flagship Engineered Systems

The Last Empire Simulation Engine

WebGL2 • GLSL Shaders • Next.js 16 • React 19 • Web Audio API
  • GPU Texture Rasterizer & GLSL Edge Pipeline:Sustained locked 60 FPS across 4,000+ interactive subdivisions with 0 DOM nodes by dynamically evaluating sub-pixel borders with smoothstep shaders over an R16UI binary state buffer.
  • Procedural Web Audio Engine with Dynamic Limiting:Eliminated 100% of audio asset overhead (0 KB network payload) by synthesizing multi-layer FM tones, filtered noise, and harmonic chords in real time via the Web Audio API.

Fluxio Visual DAG Automation Engine

Web Crypto API • Web Locks • node:vm • Drizzle ORM • PostgreSQL
  • Zero-Knowledge Vault & Hardened Sandbox:Secured credentials via in-memory 256-bit AES-GCM and PBKDF2 derivation while running user scripts inside an isolated node:vm sandbox freezing native prototypes against Prototype Pollution.
  • Multi-Tab Distributed Mutex:Prevented database write collisions and duplicate network queue flushes across concurrent browser tabs using the native Web Locks API (navigator.locks).

Vendora Multi-Tenant Commerce Engine

PostgreSQL • SELECT FOR UPDATE • Next.js 16 • Redis • Decimal.js
  • Atomic Stock Reservation:Eliminated flash-sale inventory overselling under high concurrency by executing PostgreSQL transactional row-level locks (SELECT ... FOR UPDATE) and Decimal.js precision math.
  • Zero-Latency Edge Routing:Isolated hundreds of merchant storefronts by rewriting incoming request hostnames directly at the network edge with zero client-side HTTP redirection overhead.

Metricon Telemetry & Link Infrastructure

Next.js 16 after() • Upstash Redis • Edge Telemetry • Drizzle • Zero-SSRF
  • Sub-1ms Redirect Ingestion:Delivered instantaneous HTTP 307 redirects inside Server Component pages while offloading analytics writes asynchronously via Next.js 16 after() runtime.
  • Zero-Dependency SSRF & Cookie-Free Tracking:Blocked internal RFC 1918 and cloud metadata subnets without third-party dependencies while generating GDPR-compliant visitor footprints via salted SHA-256 IP hashing.