Early access for mid-level engineers
Grow beyond coding.
Train the skills that make
engineers senior.
AI handles the syntax. The gap is now architecture, trade-offs, and engineering judgment. dev-drill is structured daily practice for the skills that actually get you promoted.
Request Early AccessSmall cohorts. Personal onboarding. No credit card.
The Problem
Coding speed is no longer the bottleneck
AI writes code faster than you ever will. The engineers who advance are the ones who know what to build, how to structure it, and why.
What AI does well
- — Generate boilerplate and CRUD endpoints
- — Translate between languages and frameworks
- — Write tests from existing implementations
What still requires you
- → Decide which trade-offs fit your system's constraints
- → Diagnose why a distributed system is degrading under load
- → Evaluate architectural options against competing criteria
- → Respond to production incidents with structured reasoning
These are the skills that separate mid-level from senior. They don't come from watching videos or chatting with a bot. They come from practice.
How It Works
Structured daily practice, not random quizzes
15 minutes a day, adaptive difficulty, measurable progress over weeks and months.
5 exercises per session
Each daily session is a focused set of 5 exercises covering architecture, trade-offs, incident response, and engineering reasoning.
AI-personalized difficulty
Every exercise type has 20 difficulty levels. The system adapts to your performance — harder when you improve, reinforcing when you struggle.
Immediate structured feedback
After each exercise, you get specific feedback on your reasoning — not just right or wrong, but why and what to consider next.
Deep-dive courses every 7 sessions
After every 7 training sessions, you unlock a deep-dive course: a multi-chapter lesson on the topics where you have the most room to grow.
Exercise Types
Five types of practice, each targeting a different skill
Not multiple choice trivia. Every exercise requires structured reasoning about real engineering scenarios.
System Design
System Under Load
Inspect live metrics across degraded distributed system components. Diagnose cascading failures, identify the root cause, and select the correct remediation — before the system fails.
System Design
Tradeoff Matrix
Evaluate architectural options against weighted criteria. Rate each option across complexity, performance, and maintainability — then defend your recommendation with structured reasoning.
Delivery Reliability
Runbook Ordering
Reorder shuffled incident response steps into the correct sequence for a live SEV1 outage. Understand why ordering matters when every minute of downtime costs.
Programming Fluency
Output Prediction
Read syntax-highlighted code and predict its exact output. Explain closures, async execution, type coercion and edge cases — step by step in your own words.
Programming Fluency
Syntax Sprint
Eight rapid-fire knowledge challenges per sprint. Language edge cases, runtime behavior, standard library details. Timed. Scored. Adaptive difficulty after every session.
Who It's For
Built for engineers who can already ship code
You're not a beginner. You write production code daily. But you feel the gap between where you are and where senior engineers operate.
3-8 years experience
You can build features end to end. You ship to production. But when conversations turn to architecture trade-offs or system design, you're less confident.
Frustrated by fragmented learning
You've tried YouTube courses, system design interview prep, and reading blog posts. Nothing sticks because nothing gives you structured, progressive practice.
Seeing AI change the game
AI writes the code you used to write. The value you bring is now judgment, architecture, and the ability to reason about complex systems, not typing speed.
Why dev-drill
Not a course. Not a chatbot. Not interview prep.
Video courses are passive
Watching someone explain CQRS is not the same as evaluating whether CQRS fits your system's constraints. dev-drill gives you the scenario and asks you to decide.
Chatbots answer, they don't challenge
Asking ChatGPT about system design gives you answers. dev-drill makes you produce the reasoning yourself, then gives you structured feedback on where your thinking was strong or incomplete.
Interview prep is the wrong goal
LeetCode and system design interview courses optimize for passing interviews. dev-drill optimizes for actually being a better engineer — the kind who makes better technical decisions every day at work.
Ready to train the skills that matter?
5 exercises a day. Adaptive difficulty. Structured feedback. Start building engineering judgment that compounds over time.
Request Early AccessSmall cohorts. Personal onboarding. No credit card.
Early Access
Be one of the first to train with dev-drill
We're onboarding engineers in small cohorts. Leave your contact and we'll reach out within 2 days.