“Most interview resources teach you what to answer. The .NET Senior Playbook teaches you how to think.”
Online Course · 50 Chapters · 800+ Q&A
The .NET Senior Playbook
An interactive online course — 50 chapters, 800+ real-world interview questions with expert answers, and a self-test after every chapter. Built to take you from junior to senior.
By Anton Martyniuk · Microsoft MVP · 12+ years in .NET
A structured path to the next level of your .NET career.
Wherever you are today — junior, mid, or senior — here's exactly what's holding you back, and what to do about it.
Junior
You're learning fast, but the .NET ecosystem is enormous.
- You don't know which topics actually matter for getting hired
- Interview questions feel random and you can't tell what's important
- You're guessing what to study next and often guessing wrong
Mid-level
You ship features, but the senior label keeps slipping past you.
- You can't pinpoint what separates you from the seniors on your team
- DI lifetimes, caching, messaging - you use them but couldn't explain them in depth
- You're not sure what options to select. What are the trade-offs, pros and cons?
Senior
You're senior on paper, but blind spots show up at the worst moments.
- Topics you skipped early on now surface in architecture reviews
- Interviewers probe areas you've never had to formalize
- You want a structured map of what 'senior' actually covers
Random blog posts, scattered YouTube videos, and docs skimmed before an interview won't get you there. This Playbook does.
Table of contents
50 chapters spanning the full .NET ecosystem.
From the fundamentals every junior needs to master, to the advanced topics that define senior-level expertise: 800+ questions with in-depth answers.
Take a look inside
See exactly what you're getting
Test yourself
Take a test after every chapter
Mid-chapter tests, full chapter tests, and a final exam — so you prove you actually know it, not just that you read it.
Questions & answers
Read questions with expert answers
Every question comes with an in-depth written answer, copy-ready code, and diagrams and comparison tables where they help.
Active recall
Try first, reveal when ready
Attempt each question yourself, then reveal the full solution whenever you want.
Instant feedback
See results and explanations
Get scored the moment you submit, with a clear explanation for every answer.
Stay organized
Bookmark anything
Save tricky questions and jump straight back to them later.
Your library
All your courses in one place
The playbook plus every bonus course — organized and ready whenever you are.
Watch a quick walkthrough
See the course in action — open a chapter, try a question, reveal the answer, bookmark it, and take a test.
Get 3 free chapters and 80 questions straight to your inbox
Try before you buy. Get the Controllers, Dependency Injection, and REST Fundamentals chapters — completely free. See the depth of the answers for yourself.
How to Use
How to Use This Playbook
This playbook covers all the topics you need to advance your .NET career — whether you're a junior developer reaching for a mid-level position, a mid-level developer ready to break into senior, or a senior who wants to level up and fill in the gaps. Here are four ways to get the most out of it.
Prepare for .NET Interviews
Going through a hiring process? Work through the chapters that match the job description. Practice answering each question out loud or in writing. By the time you walk in, you'll have already seen the hardest questions they can throw at you.
Find Your Knowledge Gaps
Go chapter by chapter and try to answer each question before reading the answer. Every time you struggle or get it wrong — you've found a gap. This is the fastest way to build an honest map of what you know and what you don't.
Level Up Few Minutes a Day
Pick one chapter per day and work through a few questions each morning or evening. In a few weeks, you'll have covered the entire .NET ecosystem — without ever feeling overwhelmed. Small, consistent progress compounds fast.
Train and Mentor Your Team
If you lead a team, use the playbook as a structured learning resource for your developers. Assign chapters based on skill level, use the questions for one-on-one discussions, or run weekly knowledge-sharing sessions around a single topic.
Is This Playbook Right for You?
The .NET Senior Playbook is designed for developers who are serious about growing their .NET careers. Here's how to know if it's the right fit.
This is for you if:
- You're a junior .NET developer who wants a clear roadmap to mid-level
- You're a mid-level developer ready to break into a senior role
- You're a senior developer who wants to fill blind spots and stay sharp
- You're preparing for a .NET technical interview at any level
- You lead a team and need a structured training resource for your developers
- You want to understand what the .NET job market actually expects in 2026
This is NOT for you if:
- You have zero programming experience — this course assumes basic C# and .NET knowledge
- You're a .NET trainee or very recent junior who doesn't yet understand how .NET and C# fundamentally work
- You're working on Desktop, Mobile, Game Dev projects or any kind of projects not related to ASP.NET Core
- You only work with other tech stacks (Java, Python, Go) and don't plan to work with .NET
- You're not willing to put in the effort — this playbook delivers results for those who actively work through it
- You are a Technical Lead, Principal Developer, or an Architect who is already proficient and has a deep knowledge of modern .NET and ASP.NET Core.
“You will get A LOT of value from this course, basic C# knowledge, in depth ASP .NET development (a whole new world for me), design patterns, SOLID, Linkedin Profile Optimization and even Soft Skills as a bonus course (this matter a lot on Senior and above roles). Highly recommended!”
Bonuses
Everything That Comes With the Playbook
The .NET Senior Playbook is more than just questions and answers. Every package comes loaded with bonus playbooks, career resources, and tools to help you land the role and grow faster.
Bonus Playbooks Included
Go beyond C# and .NET with focused guides on SOLID Principles, Design Patterns (all packages), Soft Skills Interview Questions, and Real-World Senior System Design Questions (Premium).
Career Toolkit to Land the Job
Stand out before the interview even starts with LinkedIn Profile Optimization Guide, GitHub Profile Optimization Guide, and Side-Projects Guide (available in Premium Package).
Hands-On Tests, Not Just Reading
Try each question first and reveal the answer when you're ready — then prove it with a mid-chapter test, a chapter test, and a final exam after every topic. The Custom Test Builder (coming soon, Premium) lets you generate your own test from any chapters.
Direct Access to Me
I'm Anton Martyniuk — Microsoft MVP, software architect, and .NET developer with 12+ years of experience. Get direct access to me (and other members) in my private Discord community where you can ask questions directly (available in Premium Package).
Author
Anton Martyniuk — Microsoft MVP, Software Architect, .NET Developer
Hey, I'm Anton — a Microsoft MVP, Software Architect, and .NET developer with over 12 years of experience building production systems, leading teams, and shipping software that actually matters.
I run the Anton DevTips newsletter — one of the top .NET newsletters with 25,000+ subscribers — and share daily content on LinkedIn with a community of 100,000+ developers. I've spent years helping .NET developers at every level get unstuck, close knowledge gaps, and reach the next stage of their careers.
I wrote The .NET Senior Playbook because I kept seeing the same problem: talented developers who didn't know what they didn't know. This is the resource I wish someone had given me when I was trying to level up — and now it exists for you.
What customers are saying about the playbook...
“I've conducted a lot of technical interviews over 14 years. With 100% confidence, this course is the only thing you need to pass one.”
Pricing
Pick Your Package
“The .NET Senior Playbook” is available in two packages so you can pick the one that's right for your goals.
- Features included:
- The .NET Senior Playbook (800+ questions, 50 chapters)$150
- C# Interview Questions$150
- GitHub repository with code$100
- 🎁 Bonuses included:
- SOLID Principles Blueprint$75
- Design Patterns Blueprint$75
- Total bonus value: $150 — included free
- Everything in Standard, plus:
- Custom Test Builder — generate your own test from any chapters across the course (coming soon)
- Real-World Senior System Design Questions$100
- Soft Skills Interview Playbook$75
- LinkedIn Profile Optimization Guide$100
- GitHub Profile Optimization Guide$100
- Side-Projects Guide$100
- 🎁 Premium bonuses:
- Private Discord community access — ask me questions on the course directly$300
🛡️ Every plan is backed by our 14-day money-back guarantee — try it risk-free.
Personal-use license: Each purchase is for one individual. Account sharing is not permitted. Team licensing available below.
Team licensing: Need to train your whole team? Contact me for team packages and volume pricing.
Frequently Asked Questions
Try it risk-free for 14 days
If the playbook isn’t right for you, email me within 14 days and I’ll refund you in full — no questions asked. The only real risk is walking into your next interview unprepared.
Become the .NET developer they’re looking for
800+ real-world questions across 50 chapters, hands-on tests after every chapter, and a verifiable certificate when you finish. Close every gap and walk into your next interview ready.
Lifetime access · Free future updates · 14-day money-back guarantee