Backend/full-stack engineer

High-load pet-supplies online store — 6+ years as lead developer

Problem

A federal pet-retail chain needs a reliable high-load online store: dozens of external integrations, marketplaces, delivery and payments — with no downtime under peak load.

What I built

I lead development of a 1C-Bitrix platform (PHP 7.4, legacy monolith) on nginx + php-fpm, with a Vue frontend. 30+ integrations — delivery services, payment systems, marketplaces; an internal API of ~200 endpoints, RabbitMQ queues, Redis cache. Observability with Prometheus + Grafana + Loki and Graylog. I focus on performance too: DB indexes and rewritten queries, and removing quadratic (O(n²)) scans. I extract logic from the monolith into Go microservices with a clean (ports-and-adapters) architecture. CI/CD runs on GitLab CI.

Result

6+ years as lead developer with a cross-functional team. Production holds 600+ RPS at peak. I sped up heavy endpoints by tens of times: 10s → 0.2s, 40s → 1.2s, and 2s → 0.2s on average. Releases ship through GitLab CI.

• PHP 7.4
• 1C-Bitrix
• nginx
• php-fpm
• Vue
• Go
• RabbitMQ
• Redis
• Prometheus
• Grafana
• Loki
• GitLab CI

Veterinary-services website on Symfony DDD+CQRS and FrankenPHP

Problem

A veterinary clinic needed to move away from a compromised WordPress site to a safer, editable and extensible platform: preserve legacy SEO value, give editors control over content, and prepare the foundation for bookings, pet profiles and future integrations.

What I built

I designed a modular monolith on Symfony 7.4 LTS and PHP 8.5: Site, Lead, Clinic, Catalog, Page, Seo and Admin contexts, DDD layers and CQRS through three Symfony Messenger buses. I built Twig SSR for indexable service, program, clinic, specialist and static pages; added EasyAdmin for editors, a lead form with email notifications, and idempotent content seeds imported from the old WordPress dump. Production runs on FrankenPHP/Caddy worker mode, PostgreSQL 16, Doctrine ORM 3, Docker Compose and a deploy script.

Result

The result is a modern services website with public SSR pages, an admin panel and a strong SEO/GEO foundation: canonical/meta/OG, JSON-LD for the organization, clinics, doctors, services and breadcrumbs, sitemap.xml, robots.txt, cookie consent for Yandex Metrica and 301 redirects from legacy WordPress URLs.

• PHP 8.5
• Symfony 7.4 LTS
• DDD
• CQRS
• Symfony Messenger
• FrankenPHP
• PostgreSQL 16
• Doctrine ORM 3
• EasyAdmin 5
• Twig SSR
• Tailwind CSS
• Docker

Employee portal for the pet-retail chain: bonuses, vacations, gigs, HR

Problem

Staff of the same Bethowen chain (see bethowen.ru above) need one portal: sales bonuses, vacations with approval, news, polls, gigs, store chat, HR.

What I built

A monorepo: a NestJS backend (Prisma, PostgreSQL, Redis, JWT with refresh-token rotation) and a Next.js frontend (React 19, TailwindCSS, TanStack Query). Role model — seller, store manager, network manager, HR, admin — with per-store data isolation. Bonuses are computed from the corporate sales API; notifications arrive in real time (SSE). One bearer API serves web and a mobile client; GitLab CI auto-deploys to production.

Result

MVP plus 25+ feature stages in production (lk.petretail.ru): bonuses, vacations, news, polls, notes, gigs, flea market, store chat, feedback and an HR section.

• NestJS
• Next.js
• React 19
• Prisma
• PostgreSQL
• Redis

Internal SaaS monitoring 100+ services with alerting

Problem

A retail chain needs to watch hundreds of services — HTTP, TCP, databases, domains, SSL — and be the first to know about outages.

What I built

A Go service: checks of several kinds, metrics stored in PostgreSQL + ClickHouse, alerting to Telegram and Yandex Messenger. Shipped with ADRs, OpenAPI 3.1 and architecture diagrams.

Result

Covers 100+ services. Delivered to production with full docs and a deployment guide.

• Go
• PostgreSQL
• ClickHouse
• Docker

Designer-furniture online store — 4+ years of improvements and support

Problem

A designer-furniture shop needs to evolve and maintain its existing site on a legacy stack, without a rewrite.

What I built

I improve a 1C-Bitrix site (PHP 7.4, BitrixVM): new sections and features, catalog and checkout changes. The frontend is plain JavaScript and jQuery.

Result

4+ years evolving and supporting the project in production.

• PHP 7.4
• 1C-Bitrix
• JavaScript
• jQuery

Training and assessment for furniture-store staff: quizzes, materials, admin panel

Problem

A designer-furniture store needs to train and assess its staff: learning materials, quizzes with attempts and statistics, and cabinet access granted only after admin approval.

What I built

Laravel 13 (PHP 8.5, FrankenPHP) + PostgreSQL 17. The cabinet is Inertia.js + Vue 3 + Tailwind; the admin panel is Filament 4. Quiz module: single/multiple-choice questions, timer, attempt limits, shuffling, wizard flow with autosave. Learning materials with rich content and video attach to quizzes as prerequisites. Email sign-up with admin approval and roles (spatie/laravel-permission). QA: Pest, Larastan, Pint; the whole environment runs in Docker Compose.

Result

From spec to production in 3 days and 73 commits: AI-driven development where the architecture, task breakdown and review of every commit stay with me. Live: quizzes with results and CSV export, materials, and an admin dashboard with statistics.

• Laravel
• PHP 8.5
• PostgreSQL
• Filament 4
• Inertia.js
• Vue 3

Offline privacy auditor for installed apps

Problem

Apps quietly observe what else is installed on the phone and how the device is used.

What I built

A fully offline Android app: parses manifests, scores risk from permission/receiver combinations, and explains every finding in plain language. Zero network calls, zero analytics.

Result

Open source under MIT. Local-only analysis — no servers, no signature feeds.

• Android
• Kotlin
• Gradle

A Telegram bot for currency conversion using CBR rates

Problem

Quickly convert an amount to another currency right inside a chat — no calculators or websites.

What I built

A Go bot: free-form amount input, inline mode, rate subscriptions, whitelist and admin commands, rate caching. Rates come from the official CBR XML feed.

Result

Does the math right inside the chat — no more calculators or rate websites. Deploys with a single docker-compose.

• Go
• Telegram Bot API
• Docker