Oleksii Siniaiev
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Oleksii Siniaiev · Senior Full-Stack Engineer

Senior Full-Stack Engineer — from backend architecture to frontend and deploy.

10+ years of hands-on experience across backend, frontend, payments, infrastructure, and production delivery. Laravel, Vue.js, MySQL, AWS, Docker.

Broad stack. Deep ownership. Maintainable code.

Laravel PHP MySQL REST APIs Vue.js TypeScript Redis AWS Docker GitHub Actions Stripe CI/CD
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Oleksii Siniaiev

Latest

From the blog

Technical articles based on real work: Laravel, architecture, performance, integrations, and practical engineering decisions.

When a Leaked Secret in Git Turned Into a Four-Year History Rewrite
Article Apr 11, 2026 8 min read

When a Leaked Secret in Git Turned Into a Four-Year History Rewrite

A real-world story of leaked API keys, a panicked git filter-branch that rewrote 4 years of history, and the correct incident response we should…

 Debugging a Production Site After AI Deployment — What the Browser Sees vs. What You Shipped
Article Mar 24, 2026 3 min read

Debugging a Production Site After AI Deployment — What the Browser Sees vs. What You Shipped

After deploying a portfolio site built with AI, I found broken mobile menus, bullet-point badges, and content overflow — all caused by server-level CSS…

 How I Built and Deployed a Custom WordPress Theme with AI Agents in Under 6 Hours
WordPress Mar 21, 2026 18 min read

How I Built and Deployed a Custom WordPress Theme with AI Agents in Under 6 Hours

A complete walkthrough of building a zero-JavaScript, multilingual WordPress theme on Bedrock architecture, deployed to Hostinger — with Claude Code AI doing the heavy…

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Portfolio

Selected work

Real projects I've shipped — from content platforms to SaaS products.

All projects →

Companies I've worked with

  • Artnet News
  • WebSpellChecker
  • DHL
  • WGames
  • RITE
  • SLP Test Prep
  • SPALAH

Background

A bit about me

Senior Full-Stack Engineer with 10+ years across product, outsourcing, and freelance environments. Strong across backend, frontend, integrations, infrastructure, and production delivery.

My journey started with an online store I built for my father's business while I was still in high school. It brought in real customers, and that made software feel practical from the start.

I later earned degrees in law and engineering, but chose software as my main path. Since then I have worked across freelance, outsourcing, and product teams, delivering systems with Laravel, PHP, MySQL, WordPress, Vue.js, React, billing integrations, and cloud-based delivery workflows.

What matters to me most now is ownership: understanding the whole system, making it reliable in production, and keeping it maintainable over time. Outside work, I spend time in the gym, hike in the Spanish mountains, and keep a long list of Linux and hardware projects for later.

10+ years in web development
Backend architecture and product delivery
Full-stack from APIs to dashboards to deploy
SaaS product engineering focus
  • Laravel
  • PHP
  • WordPress
  • MySQL
  • Redis
  • REST APIs
  • Vue.js
  • React
  • TypeScript
  • Tailwind CSS
  • AWS
  • Docker
  • GitHub Actions
  • Linux
  • CI/CD
  • Stripe
  • Node.js

Contact

Want to get in touch?

Best for project context, technical questions, consulting conversations, or direct engineering opportunities. Email is the simplest path.

Email [email protected] LinkedIn linkedin.com/in/alexsinyayev GitHub github.com/lex127 Telegram @Alexs127
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