Build Systems,
Not Just APIs.
Go beyond CRUD. Master high-scale architecture, observability, and industrial-grade engineering with Node, Python, and Go.
Trusted by Developers
Building Real Systems
Engineers across startups, enterprises, and independent teams use DELY to master backend architecture, concurrency, and production systems.
Advanced Architecture Topics
In-Depth Backend Lessons
Production-Focused Content
Lifetime Access
Our Core Values
Production Ready
Stop learning basics. We focus on real-world patterns used in systems handling millions of requests.
Cross-Language Mastery
Learn the concepts once, apply them anywhere.
Direct Funnel to Pro
Our premium tracks provide deep dives into deployment, security, and high-scale architecture.
Architectural Tracks
Select your specialization and start building.
Node.js Mastery
Master asynchronous architecture and high-scale Express deployments.
Python Mastery
Rapidly build secure, type-safe backends with the power of FastAPI.
Go Mastery
Achieve legendary performance with Fiber and cloud-native concurrency patterns.
Java Mastery
Build enterprise-grade backends with Spring Boot and JVM performance.
C# Mastery
Create robust, scalable APIs using .NET and ASP.NET Core.
PHP Mastery
Power dynamic web backends with Laravel and modern PHP practices.
Ruby Mastery
Build elegant backends quickly with Ruby on Rails.
More Tracks Coming
MongoDB, SQL, Rust, Kotlin, Lua, Typescript, Swift and more are being architected as you read this.
The Pro Community
Join thousands of backend engineers who have leveled up their careers with Dely.
"Dely's roadmap is the best I've seen. It doesn't just teach code; it teaches the thinking behind the code."
"The Go track saved me weeks of architectural research. The distributed system patterns are pure gold."
"We use Dely to onboard all our junior engineers. The consistency across languages is unique."
See the Journeys of
15,000+ Engineers
From first lines of code to leading backend at companies like Google, Stripe, and Microsoft. Real people. Real numbers. Real growth.
Read Success StoriesFree vs Pro
Every module starts free — first 4 chapters unlocked. Go deeper with Pro.
| Curriculum Phase | Basic FREE ACCESS | Recommended PRO MEMBERSHIP |
|---|---|---|
Phase 1: FoundationsFirst 4 chapters free. Master variables, structures, and basic execution flows. | Included | Unlimited Access |
Phase 2: IntermediateFirst 4 chapters free. Concurrency, I/O patterns, and service-oriented primitives. | Included | Unlimited Access |
Phase 3: AdvancedFirst 4 chapters free. Distributed locking, pub/sub architecture, and consistency models. | Included | Unlimited Access |
Phase 4: Enterprise BackendFirst 4 chapters free. Observability, tracing, performance tuning, and capacity planning. | Included | Unlimited Access |
All Remaining ChaptersEvery chapter beyond the first 4 in every phase — full depth, no limits. | Locked | Unlimited Access |
| Start Coding | Unlock Pro Access |
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