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masihjahangiri/README.md

About

Senior Full-stack and platform engineer with 12+ years of experience building production systems end-to-end — from backend APIs and cloud infrastructure to polished frontend experiences.

I've shipped across the full stack and I'm comfortable owning features from architecture through deployment and monitoring. I've also led engineering teams (up to 15), run architecture reviews, and mentored developers — but I'm equally happy heads-down writing code and solving hard problems.

Production at Scale

Built and operated a globally distributed subscription platform as sole developer — architecture, infrastructure, product, and operations.

  • Designed and ran a 100-node server fleet across 20 countries on Linux — provisioning, load balancing, health checking, automated failover, and zero-downtime deployments
  • Scaled to 5,000+ paying subscribers, 100K+ transactions, and 15K+ concurrent sessions
  • Built production observability with Prometheus, Grafana, and Alertmanager — near-zero downtime maintained throughout
  • Full application stack: NestJS + GraphQL + PostgreSQL backend; Next.js + React frontend
  • Multi-currency payment processing across 20 countries, handling subscriptions, renewals, and refunds

What I Work On

  • Full-stack development — backend APIs, frontend UIs, and everything in between
  • Platform & infrastructure — CI/CD, containerization, cloud infrastructure, observability
  • Architecture & systems design — multi-tenant SaaS, microservices, scalability and reliability
  • Team leadership & mentoring — engineering practices, code reviews, cross-team delivery

What I bring:

  • Full-Stack ownership — architecture through deployment and monitoring
  • Frontend development — React, Next.js, TypeScript, responsive UIs, design systems
  • Back-End engineering — Node.js, NestJS, GraphQL, REST APIs, PostgreSQL
  • DevOps / SRE / Platform — Docker, Kubernetes, Terraform, AWS, CI/CD, observability

Credentials

  • 100-node fleet · 5K+ paying subscribers · 100K+ transactions · 15K+ concurrent sessions — all on self-managed Linux infrastructure
  • 11,000+ StackOverflow reputation — top ~1% of all users, 13M+ developers reached
  • Led 15-person engineering team as CTO; contributed as senior engineer across multiple product companies

Links

Pinned Loading

  1. radshim/backend radshim/backend Public

    Production NestJS + GraphQL API that processed 100K+ sales with 5K+ concurrent subscribers. Multi-tenant architecture, Telegram bot integration, self-managed Docker infrastructure. Solo-built and o…

    TypeScript

  2. radshim/frontend radshim/frontend Public

    Production Next.js frontend for a subscription platform with 5K+ concurrent users. Static export, Apollo Client with cache persistence, Radix UI + Tailwind, typed GraphQL codegen. Deployed via rsyn…

    TypeScript

  3. fleet-monitoring-stack fleet-monitoring-stack Public

    Production monitoring stack for multi-node servers. Prometheus, Grafana, Alertmanager with pre-configured dashboards, alerts, and Telegram notifications.

    Dockerfile

  4. Automate-Elasticsearch-backup Automate-Elasticsearch-backup Public archive

    Automate Elasticsearch backup from a remote server via SSH tunnel in a docker container (dockerized)

    Shell

  5. docker-postgres-backup-via-ssh docker-postgres-backup-via-ssh Public

    Dockerized PostgreSQL backup from remote servers via SSH tunnel. Automated pg_dump scheduling, configurable retention, built-in file browser.

    Shell 6 4

  6. directory-backup-remotely-docker directory-backup-remotely-docker Public

    Dockerized remote directory backup via SSH and rsync. Daily scheduling, configurable retention, built-in file browser for browsing archives.

    Shell 4