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rahunak/README.md
Eugene Zaiko banner


Profile views Followers Experience Open to remote

👋 About me

Senior Full-Stack Engineer with 5+ years of commercial experience. I build end-to-end web applications and backend systems that stay fast and reliable as they grow.

  • ⚙️ Event-driven systems: queues, async job processing, idempotency, real-time updates over WebSockets
  • 🤖 AI in production: inference pipelines with concurrency control, job prioritization, and automatic refunds for failed tasks
  • 🗄️ Database performance: PostgreSQL partitioning and execution-plan tuning (reports over 109M+ records: from 1 hour to under 5 seconds)
  • 🏢 Multi-tenant infrastructure: migrations and schema updates across 216+ independent databases
  • 🌐 Web and SEO: websites and web apps with technical SEO for small businesses

🛠️ Tech stack

Backend

Backend

Frontend

Frontend

Databases and messaging

Databases

DevOps and tooling

DevOps

Testing

Testing

🚀 Selected work

Area What I did Stack
AI media platform Built an event-driven orchestration system and an MVP from scratch in 2 months; async AI inference pipelines, idempotent jobs, automated credit refunds, real-time job status NestJS, BullMQ, Redis, AWS S3, Next.js
Fintech reporting Cut report queries over 109M+ records from 1 hour to under 5 seconds; built analytical dashboards and secure banking-partner APIs with RBAC PostgreSQL, React, TypeScript, PHP/Symfony
University multisite Managed migrations and schema updates across 216+ databases; containerized a Drupal/WordPress ecosystem, reducing deployment failures by 70% PHP, Docker, MySQL

📊 GitHub stats

GitHub streak

🤝 Let's talk

I'm happy to discuss backend architecture, performance problems, AI integrations, or a new project. Write me on Telegram or LinkedIn.

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