Modernizing a High-Load E-Commerce Platform with Headless Architecture

Executive Overview

This project focused on modernizing a high-load e-commerce platform built on 1C-Bitrix without disrupting live business operations. Instead of a risky full rewrite, a pragmatic Headless architecture was introduced, preserving core business logic while dramatically improving frontend performance and scalability.

Business Challenge

• ~28,000 products with complex SKU structure
• Multi-region availability and pricing logic
• Slow catalog navigation and filtering
• SEO-critical structure that could not be broken
• Growing technical debt and release instability

Strategic Architecture Decision

Rather than replacing the legacy PHP backend, we preserved the stable revenue-generating core (orders, pricing, integrations) and decoupled the frontend.

• Backend: 1C-Bitrix (PHP)
• Frontend: Next.js (Headless approach)
• Search & Filtering: Elasticsearch
• CI/CD: GitLab CI + GitHub Actions
• Infrastructure: Dockerized environments

Key Leadership Contributions

• Led cross-functional teams (Backend / Frontend / QA)
• Designed scalable system architecture
• Introduced GitFlow and structured release management
• Implemented automated CI/CD pipelines
• Improved production stability via DevOps practices
• Integrated AI-powered search & recommendation systems
• Implemented ChatGPT-based internal workflow automation

Technical Deep Dive

Headless Migration Strategy

The migration avoided a "big-bang rewrite." The catalog layer was extracted and rebuilt in Next.js while preserving backend business logic. SEO-critical URLs and indexing logic were maintained to prevent ranking loss.

Search Architecture

Elasticsearch was introduced as a dedicated search engine with region-aware indexing. Catalog filtering became near-instant due to optimized query structures and cache layers.

DevOps & Stability

Full Docker-based environments ensured parity across development, staging, and production. Automated pipelines reduced deployment errors and improved release predictability.

Results

• Near-instant catalog navigation and filtering
• Zero SEO ranking loss during migration
• Improved release stability
• Reduced deployment risks
• Increased system scalability
• Improved production reliability

Impact as a Technical Leader

This project demonstrates pragmatic modernization: evolving a revenue-generating legacy system without operational downtime, while significantly improving performance, developer experience, and architectural scalability.