Kazem Mirzaei

Senior Full Stack Developer · SaaS & Multi-tenant Platforms · Laravel, Next.js, .NET

Turkey · Open to remote (UTC+3)

kazemm.devkazemmdev@gmail.comlinkedin.com/in/kazem-mirzaeigithub.com/kazemmdev

Senior full stack engineer with 8+ years of experience taking SaaS products from requirements to production, covering system design, backend services, frontend, and infrastructure. Co-founder of GradeUp, a multi-tenant education platform, and engineering lead on consumer platforms built to handle traffic spikes from influencer campaigns.

Experience

Senior Full Stack Developer · Confidential

Jun 2026 - Present

  • Building an enterprise workflow automation platform for an automotive manufacturer on .NET, ABP Framework, and Elsa Workflows.
  • Designed role-based approval flows with escalation timers, a shared task inbox, and append-only audit records.

Co-Founder & Lead Full Stack Engineer · GradeUp

Dec 2024 - Present

  • Built a multi-tenant SaaS where each tutor gets a branded site, subdomain, and isolated database, provisioned in under 10 minutes.
  • Designed the Laravel API as stateless services so pods scale out during tutor launch campaigns and back in afterwards.
  • Moved FFmpeg transcoding to dedicated nodes and split jobs into priority queues so payments never wait behind video.

Frontend Developer · TobiBot, Beleb Software

Nov 2025 - Mar 2026

  • Built a Next.js app with subscriptions and a real-time partner panel at TobiBot; fixed React rendering issues at Beleb.

Full Stack Developer, Mobile & AI · Tidalflow

Sep 2025 - Dec 2025

  • Built photo meal logging, AI meal plans, and real-time chat in React Native, with a Node.js, Prisma, and Supabase API.

Freelance Full Stack Developer · Upwork

Apr 2023 - Jun 2025

  • Completed 10+ full stack projects for international clients with a 100% Job Success Score.
  • Rebuilt an influencer's yoga platform, migrating legacy student and course data and adding protected video streaming.

Lead Full Stack Developer · Hunter

Dec 2022 - Apr 2025

  • Broke the Laravel monolith into services, starting with the video transcoder, and rewrote mission scheduling as a Go service.
  • Reduced the Docker image from about 1 GB to under 400 MB with multi-stage builds, speeding up deploys and scale-out.
  • Made app servers stateless (Redis, S3) so K3s could add pods during influencer campaign bursts.
  • Tuned background jobs with priority queues, batched notifications, and retries with backoff.
  • Improved Next.js load time and SEO for blog and course pages with server rendering and image optimization.

Full Stack Developer · Lazo (via Upwork)

Apr 2023 - Nov 2024

  • Cut page load time from about 8 seconds to under 1 second by refactoring the Next.js app.
  • Reworked Stripe payments for subscriptions and B2B payouts, and localized the product into four languages.

Full Stack & Frontend Developer · Torotazeh, eVergabe.de

May 2022 - Oct 2022

  • Built a location-based produce marketplace in Laravel and Nuxt.js with TDD and CI/CD; fixed a slow React list load in Germany.

Co-Founder & Full Stack Developer · Percept

Nov 2019 - Mar 2021

  • Co-founded a creator platform that paid writers by views, with a custom Persian RTL editor and Docker deployments on Hetzner.

Backend Developer · Faraz Ati Afarin

Oct 2017 - Nov 2018

  • Developed Laravel backend features and added Redis caching for frequently read data.

Skills

Languages:
PHP, TypeScript, JavaScript, Go, C#
Frameworks:
Laravel, Next.js, React, Nuxt.js, Node.js, Express, React Native, Expo, .NET, ABP Framework, Elsa Workflows
Architecture:
Multi-tenant SaaS, microservices, stateless services, DDD, queues and background jobs, caching
Data:
MySQL, PostgreSQL, SQL Server, Supabase, Redis, S3
DevOps:
Docker, Kubernetes (K3s), GitHub Actions, CI/CD, Grafana
Integrations:
Stripe Connect, WebSockets, PubNub, Customer.io, FFmpeg video streaming, LLM prompt engineering

Education

M.Sc. in Systems Engineering

University of Tehran · 2015 – 2018