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firasmlt/README.md

Hey, I'm Firas Melliti πŸ‘‹

Lead Software Engineer Β· Full-Stack (NestJS/React) Β· Multi-tenant SaaS & Cloud Architecture


About Me

  • Full-stack engineer (6+ years) focused on multi-tenant SaaS, healthtech, and payments.
  • I build scalable systems with NestJS, React, Prisma, PostgreSQL, and Docker on GCP (Cloud Run + VPC).
  • Upwork Top Rated Plus (Top 3%). I care about results, reliability, and clean architecture.

What I’m Building Now

  • Black Label Solutions / Aide Products β€” Lead engineering across:
    • Affiliaide, Roofaide, Healthaide/Hyve Wellness (multi-tenant SaaS; SSO via Supertokens).
    • 4Ever Young custom booking & payments for 60+ U.S. clinics (Stripe, SendGrid, Zenoti, GHL).
    • Healthie EHR integrations, including work for OpenLoop ($1B+ valuation).
    • Deployed a microservice ecosystem on GCP Cloud Run with private networking, CI/CD.

Selected Work Highlights

  • Leadshook (09/2024–09/2025) β€” Rebuilt v3 of a decision-tree SaaS used by marketers managing 200k daily leads and $20M+/mo ad spend.
    Migrated AngularJS β†’ Angular; backend in NestJS + MySQL + Docker; reliability and DX massively improved.

  • Gyoom (01/2023–08/2024) β€” Shipped web/mobile platform reaching 2,000,000+ active users; backend sustained 250+ req/s.
    Stack: React, Express, TypeScript, MongoDB. Built analytics system + admin dashboard.

  • Tutosh (2021–2023) β€” E-learning platform with 7 microservices using TypeScript, NestJS, GraphQL, PostgreSQL, Angular.


Tech I Use

  • Languages: TypeScript, JavaScript
  • Frontend: React, Next.js, Angular, Redux/Toolkit, Vite, TailwindCSS
  • Backend: Node.js, NestJS, Express, GraphQL, Prisma
  • Databases: PostgreSQL, MySQL, MongoDB
  • Cloud/Infra: Docker, GCP (Cloud Run, VPC), CI/CD, Linux, Nginx
  • Auth & Integrations: Supertokens (SSO), Stripe, SendGrid, Healthie, Zenoti, GoHighLevel, OAuth/JWT
  • Testing: Jest

Principles

  • Ship fast, with clean boundaries (domain-driven, modular services).
  • Observability-first (logs/metrics) and security by default (least privilege, secret hygiene).
  • Multi-tenant from day one (per-tenant isolation, subdomain routing, safe migrations).

Contact

Popular repositories Loading

  1. firasmlt firasmlt Public

    1

  2. tutosh-app tutosh-app Public

    tutosh mobile app | react native

    TypeScript

  3. jest jest Public

    Forked from jestjs/jest

    Delightful JavaScript Testing.

    TypeScript

  4. firasmlt1 firasmlt1 Public

    1

  5. nvim-config nvim-config Public

    my nvim configuration

    Lua

  6. tunicode tunicode Public

    TypeScript