Joseph Yas_
Senior Full-Stack Engineer · Tech Lead · 7+ yrs
I build scalable systems that survive high traffic — and the teams that keep them alive.
Who I am
# Senior full-stack engineer with 7+ years designing, building, and operating production web systems — from high-traffic platforms to a co-founded product serving 10K+ users. Backend depth in PHP/Laravel with Go, Python (FastAPI), and NestJS services; frontend in React, Next.js, and TypeScript. Runs everything on Docker with CI/CD, Redis-backed queues, and monitored deployments — 99.8% uptime across four production services, load-tested to 5,000 concurrent users. Values clean architecture, testing, and pragmatic delivery.
I lead small, high-trust teams and like the unglamorous parts: on-call rotations, runbooks, code reviews, and automating the work nobody wants to do twice. I've taken services to 99.8% uptime, built an ERP that removed 70% of manual ops, and shipped landing pages that absorb 10K+ signups a week.
Equally at home translating architecture trade-offs for the C-suite and pairing with a junior on their first PR. I care about systems that don't break and teams that don't burn out.
The stack
- PHP 8.x (OOP, SOLID)
- Laravel 12/13
- Eloquent ORM
- RESTful API Design
- Queues & Jobs
- Sanctum Auth
- Filament & Livewire
- Pest Testing
- React 19
- Next.js 16 (SSR/SSG)
- TypeScript
- JavaScript (ES6+)
- TailwindCSS
- shadcn/ui
- Zustand
- TanStack Query
- Go (chi, GORM)
- Python (FastAPI)
- NestJS
- JWT & OAuth2
- HMAC Request Signing
- Idempotency Patterns
- Payment & SMS Gateways
- MySQL & Query Optimization
- PostgreSQL Tuning
- Redis (cache, queues, sessions)
- MongoDB
- ERD & Schema Design
- Docker & Compose
- GitHub Actions / GitLab CI
- Linux Admin
- Nginx / Caddy
- Prometheus & Grafana
- Locust Load Testing
- On-Call Incident Response
- OWASP Top 10
- SQLi / XSS / CSRF
- JWT & OAuth2
- OTP Flows
- Rate Limiting
- Vuln Scanning
Selected work
Zargold.plus — Precious-Metals Exchange
Sole Developer · Zargold.plus ↗
A trading exchange built solo — Laravel modular-DDD backend + Next.js frontend — with a hash-chained append-only wallet ledger, idempotency keys, HMAC-signed price quotes, KYC, and payment-gateway integrations. Pest suite covers ledger invariants and trade execution.
Portfo.plus — Investment Platform
Co-Founder & Technical Lead · Portfo.plus ↗
Co-founded an investment advisory & portfolio platform and built it end-to-end — Laravel REST API, Next.js frontend, phone-OTP auth, subscription payments, and Redis-backed queues — shipped as a PWA + Android (TWA) app behind a Pest test suite.
Market-Data & Automation Estate
Technical Lead · ForexShayan ↗
A ~19-service production estate behind Nginx/Caddy: an async FastAPI aggregator ingesting 16 market data sources into Redis + PostgreSQL, a Go REST service, a NestJS licensing SaaS, and automation bots across three messaging platforms — all deployed via GitHub Actions.
Back-Office ERP
Technical Team Lead · Barjil ↗
A custom ERP that replaced spreadsheet-driven operations with auditable, queue-backed workflows — automating routine back-office tasks and removing a whole class of manual error across the business.
Dark-Store Reliability
Technical Team Lead · Barjil ↗
Operate four production dark-store services under a weekly on-call rotation — metrics, alerting, and runbooks that hold 99.8% uptime across the fleet and keep incident response fast and repeatable.
High-Concurrency Funnels
Senior Full-Stack Developer · Khane Sarmaye ↗
Acquisition funnels for an investment platform — server-rendered landing pages and A/B-tested flows engineered to convert 10K+ signups a week without degrading under spiky campaign load.
WordPress Plugin Suite
Senior Full-Stack Developer · Datarivers
A library of 250+ bespoke WordPress and WooCommerce plugins for international clients — shipped on tight timelines behind QA gates that kept production stable at scale.
Shipped websites
Where I've worked
Co-Founder & Technical Lead @ Portfo.plus
Mar 2026 — PresentRemotecurrent- Co-founded an investment advisory & portfolio platform and built it end-to-end — Laravel 12 REST API + Next.js 16 (TypeScript, Tailwind).
- Grew the product to 10K+ registered and 2K+ active users in ~4 months.
- Implemented Sanctum phone-OTP authentication, subscription payments, and Redis-backed caching & queues with dedicated worker and scheduler containers on a Dockerized MySQL stack.
- Ship behind a Pest test suite with one-command dev/prod-parity deploys; distributed as PWA + Android (TWA) app.
Technical Team Lead @ Barjil
Apr 2024 — PresentTehran, Irancurrent- Lead the weekly on-call rotation, maintaining 99.8% uptime across four production dark-store services.
- Planned and developed a custom ERP system for back-office operations, automating 70% of routine tasks and reducing operational errors by 50%.
- Present architecture trade-offs to C-suite stakeholders; designed the technical team's structure, review processes, and standards, improving delivery timelines by 30%.
Technical Lead @ ForexShayan Academy
Nov 2024 — PresentRemote · Part-timecurrent- Own a ~19-service production estate (30+ Docker containers behind Nginx/Caddy) spanning Laravel platforms, a NestJS licensing SaaS, WordPress sites, and Python/Go microservices.
- Built an async FastAPI price aggregator ingesting 16 market data sources into Redis + PostgreSQL, and a Go (chi) REST service; automated production deploys with GitHub Actions CI/CD.
- Shipped automation bots across three messaging platforms (broker-API integrations, LLM-powered news translation) and high-traffic OTP/SMS registration funnels.
Senior Full-Stack Developer @ Khane Sarmaye
Apr 2022 — Sep 2024Tehran, Iran- Developed high-traffic landing pages sustaining 10K+ concurrent user registrations per week.
- Built API automations across 8+ production websites, reducing manual workload by 30%.
Senior Full-Stack Developer @ Datarivers
Apr 2018 — Apr 2022Amsterdam, Netherlands · Remote- Designed and programmed 250+ custom WordPress/PHP plugins for international clients, reducing delivery timelines by 25%.
- Maintained 99% uptime for client applications through systematic QA and risk evaluations.
- Diagnosed and resolved production issues end-to-end while working fully remotely with internal and external teams.
Let's build something
$ echo $STATUS
→ Open to senior / lead roles · remote-friendly