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Production-Grade IT Education

Go From Coder to Production Engineer

Build job-ready programming skills through hands-on projects in C#, .NET, JavaScript, React, and Python — personally designed and taught by a Software Architect with 15+ years of production experience. Mentorship and code review included.

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Structured Learning Path

Productized expertise: master architecture through hands-on projects and mentorship.

C# Pro: Advanced Programming & System Design
Advanced

C# Pro: Advanced Programming & System Design

Master the advanced capabilities of C# and .NET. Learn collections, reflection, async programming, threading, GC, serialization, TPL, functional programming, Windows kernel synchronization and more.

C#.NETAdvanced
⏱ 9 weeks
👥 7.2K enrolled
Design Patterns in C#: From Theory to Practice
Advanced

Design Patterns in C#: From Theory to Practice

Master classic GoF design patterns in C#. Learn how to apply creational, structural and behavioral patterns to build clean, flexible and maintainable systems.

C#Design PatternsArchitecture
⏱ 6 weeks
👥 5.8K enrolled
1:1 Backend & Architecture Review
Advanced

1:1 Backend & Architecture Review

A private 1:1 architecture-focused session to identify risks, clarify trade-offs, and define concrete next steps. We review your backend architecture and code, assess production readiness, and deliver a clear action plan tailored to your goals.

BackendArchitectureCode Review
⏱ 1 weeks
👥 92 enrolled
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Who We Work With

We help individual engineers and teams solve real technical and career challenges — at every stage of growth.

For Individual Engineers

  • Accelerate your career growth with clear next steps
  • Master code review and production-quality practices
  • Prepare confidently for technical and system design interviews
  • Learn how to think in systems, not just write code
Start with a 1:1 Review

For Teams & Companies

  • Independent architecture review & technical assessment
  • Technical due diligence before scaling or investment
  • Targeted team training & upskilling
  • Technical hiring and interview support
See B2B Services

How We Work

A clear, senior-level process focused on outcomes, not abstract advice.

1

Context & Goals

We clarify your objectives, constraints, and success criteria before touching code or architecture.

2

Review & Diagnosis

Deep analysis of code, architecture, processes, and technical decisions — based on real-world production experience.

3

Recommendations & Roadmap

Concrete recommendations with trade-offs, priorities, and a realistic execution plan.

4

Follow-up & Support

Optional follow-up to support execution, answer questions, and track real progress.

Oleksii Anzhiiak
Meet Your Instructor

Oleksii Anzhiiak

Software Architect, Senior .NET Engineer & Co-Founder

Oleksii Anzhiiak is a Software Architect, Senior .NET Engineer, and Co-Founder of ToyCRM.com and ProfectusLab. With over 15 years of experience, he specializes in distributed systems, cloud infrastructure, high-load backend development, and identity platforms. Oleksii designs complex architectures, builds secure authentication systems, and develops modern engineering education programs that help students achieve real career results.

Meet the Team

Expert Guidance Beyond Courses

One-on-one mentoring, code reviews, and interview preparation from a Software Architect.

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What You'll Learn

Master in-demand skills with practical projects

Backend Development

Web Development

QA Engineering

Python & Data

DevOps Basics

Technical Insights & Thought Leadership

In-depth analysis of real production challenges and architectural decisions.

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Join a Community of Builders

Connect with other engineers, share projects, and grow together.

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Production-Focused Programming Courses in C#, .NET, JavaScript, React & Python

Learn modern software engineering from a Software Architect with 15+ years of production experience. Build deployable projects, get code reviews, and follow a clear path to job-ready skills.

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Profectus Lab provides professional programming education built around the way real teams deliver software. Courses are personally designed and taught by a Software Architect with 15+ years of production experience, covering C#, .NET, JavaScript, React, Python, databases, APIs, and the engineering practices that matter in real jobs.

Instead of passive watching, you learn by building. Every program includes hands-on assignments, production-style patterns, and practical workflows: Git, debugging, clean architecture, testing, and deployment basics. You’ll understand not only how to write code, but how to structure it so it stays maintainable as a project grows.

Whether you’re starting from zero, leveling up from junior to mid, or preparing for senior interviews, the curriculum emphasizes outcomes: portfolio-quality projects, clear explanations, and consistent feedback. You’ll learn to communicate technical decisions, avoid common anti-patterns, and build confidence through practice.

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