$ whoami

Vitalii Panfilov

Full Stack Engineer — back-end and front-end development

8+ years building scalable web applications and API-driven platforms — from architecture to production. High-load systems, real-time apps, performance obsession.

get in touch

// summary

8+ years building
for production
80K+ users on a product
I built from scratch
50× faster API calls
5s → 100ms
30+ legacy projects
migrated to PHP 8

I design and ship products end-to-end: backend architecture in Laravel and NestJS, frontends in Vue/Nuxt with TypeScript, real-time features over WebSockets. One of my proudest achievements — independently building a project from concept to production that won VK DEV GRANTS 2025.

// experience

Full Stack Engineer

Sep 2024 — Present

Spider Group · remote · 2y 2m

  • Architected and developed a complex e-auction trading platform from scratch — launched for 80K+ active users, supporting 100+ live auctions daily.
  • Optimized product-matrix lookup algorithms for a high-scale B2B store: instant catalog rendering and much faster (-20%) mobile app responsiveness.
  • Implemented feature testing for SAP synchronization and expanded system logging — incident count down 90%.

Full Stack Web Developer

Dec 2020 — Sep 2024

ClickON · remote · 3y 10m

  • Reduced API response times from ~5s to under 100ms by overhauling complex SQL queries and backend performance.
  • Migrated 30+ e-commerce projects from PHP 5.6/7.2/7.4 to PHP 8+.
  • Lifted Google PageSpeed from 50 to 90+ (green zone) via Core Web Vitals optimization.
  • Mentored 2–5 junior developers through code reviews (~20–30/week) and knowledge sharing.

Full Stack Web Developer

Sep 2018 — Dec 2020

Freelance, self-employed · remote · 2y 4m

  • Built a secure customer portal for microfinance (MFO) clients with self-service account management.
  • Designed an admissions eligibility engine matching exam scores to qualifying university programs in real time.
  • Created an immersive virtual campus tour with custom Google Panoramas.

Intern Programmer

May 2018 — Aug 2018

INTERVOLGA

  • Optimized corporate-portal UI for managing business processes; architected custom PHP workflows and dynamic front-end components.

// education

Master of Software Engineering — Volgograd State University 2019–2021

Bachelor of Software Engineering — Volgograd State University 2015–2019

// skills

backend

  • PHP
  • Laravel
  • NestJS
  • Node.js
  • Express
  • REST APIs
  • PostgreSQL
  • MySQL

frontend

  • Vue
  • Nuxt
  • Quasar
  • Vuetify
  • React
  • TypeScript
  • RxJS
  • Lottie

architecture & infrastructure

  • Redis
  • Kafka
  • RabbitMQ
  • Docker
  • CI/CD
  • Microservices
  • System Design
  • AWS / GCP

real-time

  • WebSockets
  • LiveKit
  • Colyseus
  • Laravel Reverb

performance

  • SQL optimization
  • Caching
  • Core Web Vitals
  • Load testing

// achievements

🏆 winner

VK DEV GRANTS 2025 — Lapa Play

Independently designed and developed a project from concept to production. Laravel · Vue · Colyseus · LiveKit.

🏆 winner

Digital Breakthrough Hackathon

Online learning platform improving the educational experience for university students. Laravel · Vue · Tailwind CSS.

// contact

Have a product idea, a high-load system that needs rescuing, or just want to talk architecture?

panfilov.v@icloud.com Telegram GitHub LinkedIn