DOCUMENT
THE WHOLE
SYSTEM.

01 / Start here Beginner → advanced

Developer learning roadmap

A practical order for learning programming, DSA, web development, databases, systems, testing, and production deployment.

roadmapstudybeginnercareer

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02 / Start here Beginner

Programming fundamentals

The core ideas shared by nearly every programming language: data, control flow, functions, scope, errors, files, and program structure.

variablesloopsfunctionsoop

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03 / Languages Beginner → intermediate

JavaScript for modern applications

JavaScript fundamentals, DOM events, modules, async/await, fetch, validation, and browser security boundaries.

javascriptdomasyncfetch

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04 / Languages Intermediate

Kotlin and Android fundamentals

Kotlin syntax, null safety, coroutines, Android architecture, state, storage, networking, and lifecycle-aware code.

kotlinandroidcoroutinesviewmodel

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05 / Web + frameworks Intermediate

HTTP, REST APIs, and backend design

Requests, responses, status codes, JSON APIs, validation, idempotency, pagination, authentication, and API boundaries.

httprestapijson

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06 / Data + backend Intermediate → advanced

Backend architecture and data integrity

Service boundaries, validation, transactions, migrations, concurrency, caching, and designing state changes that remain correct under failure.

backendtransactionsmigrationsconcurrency

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07 / Systems + delivery Intermediate

Linux, networking, and Docker

Linux service basics, permissions, ports, IP addressing, sockets, reverse proxies, containers, and deployment troubleshooting.

linuxnetworkingdockerports

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08 / Systems + delivery Intermediate → advanced

Application security essentials

Authentication, authorization, password hashing, MFA, CSRF, XSS, CSP, rate limiting, secrets, uploads, and secure production defaults.

securitycsrfxssmfa

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09 / CodeDev system System reference

CodeDev deployment and operations

Render/Docker production configuration, PostgreSQL, Cloudinary, Redis/Valkey, migrations, uptime monitoring, health checks, recovery, and deployment verification.

codedevrenderdockerdeployment

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10 / CodeDev system System reference

CodeDev inquiries, CRM, and Resend notifications

The implemented contact-to-CRM flow, preferred-contact data, Resend owner notifications, retry behavior, and what the system does not claim about final email delivery.

codedevcontactcrmresend

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