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Mihail Leybuk-Galin — home

Product Engineering & Architecture.

I partner with visionary founders and engineering teams to architect scalable, resilient, and forward-looking software systems. My services bridge the gap between high-level business strategy and deep technical execution, ensuring your technology stack is a competitive advantage, not a liability.

Strategic Technology Services

Fractional CTO

Executive-level technical leadership on a part-time basis. I guide technology strategy, build high-performing engineering teams, and oversee critical technical decisions, aligning them with your overarching business goals.

  • Technology Roadmap Development
  • Team Mentorship & Hiring
  • Vendor & Tool Selection

Architecture Audits

Comprehensive evaluations of your existing software architecture. I identify bottlenecks, security vulnerabilities, and areas for optimization, providing a detailed, actionable blueprint for modernization and scale.

  • Codebase Quality Review
  • Infrastructure Assessment
  • Scalability & Performance Analysis

Platform Scaling

Designing and implementing resilient architectures capable of handling massive growth. I specialize in migrating monolithic systems to microservices and optimizing databases for high-throughput environments.

  • Microservices Architecture Design
  • Cloud Infrastructure Optimization
  • High-Availability System Design

Core Expertise

E-commerce Architecture

Designing headless commerce solutions that decouple the frontend experience from backend logic, enabling unparalleled flexibility and performance. Expertise in complex integrations with Shopify Plus, ERP systems, and modern frontend frameworks.

  • Headless CMS Integration
  • Next.js / React Frontends
  • Shopify Plus Customization
  • Omnichannel Architecture
Headless e-commerce architecture connecting web and mobile frontends to a CMS, API gateway, commerce engine, payments, order management, customer data, and search.

FIG. 1: HEADLESS COMMERCE TOPOLOGY

Open full-size diagram: E-commerce Architecture

SaaS Platforms & AI Integration

Building secure, scalable multi-tenant architectures for modern SaaS products. Seamlessly integrating advanced AI capabilities (LLMs, machine learning models) into core product workflows to deliver intelligent, differentiated user experiences.

  • Data Isolation Strategies
  • LLM API Integrations
  • Serverless Architectures
  • Scalable Data Pipelines
AI-powered e-commerce ecosystem connecting storefronts and an AI assistant to catalog, order, customer, analytics, and automation services, with integrations, messaging, storage, and infrastructure.

FIG. 2: AI-POWERED COMMERCE ECOSYSTEM

Open full-size diagram: SaaS Platforms & AI Integration

High-Load Systems

Engineering robust systems designed for extreme concurrency and low latency. Utilizing advanced caching strategies, asynchronous processing, and distributed databases to ensure stability under immense traffic loads.

  • Event-Driven Architecture
  • Distributed Caching
  • Load Balancing Strategies
  • Performance Profiling
High-load system architecture showing clients, edge security, load balancing, application services, Kafka event streaming, databases, caching, and deployment infrastructure.

FIG. 3: HIGH-LOAD SYSTEM ARCHITECTURE

Open full-size diagram: High-Load Systems

Engagement Model

  1. PHASE 1

    Discovery

    Deep dive into your business objectives, technical constraints, and current architecture.

  2. PHASE 2

    Blueprint

    Developing a comprehensive architectural roadmap and technical strategy tailored to your needs.

  3. PHASE 3

    Execution

    Guiding implementation, mentoring teams, and ensuring rigorous adherence to the architectural vision.

  4. PHASE 4

    Optimization

    Continuous monitoring, performance tuning, and scaling the system as your user base grows.

Ready to architect your next phase?

Let's discuss how strategic technical leadership can accelerate your product vision.