OOctoResearch Preview
  • Prepare for
  • Certification·
  • Job Interview
  • AI
  • Engineering
  • Product
  • Data
  • Design
  • Marketing
  • Leadership
  • Founders
All categories›Engineering

Frontend

Start with your own topic→

Senior Frontend Engineering

The skills that separate senior frontend engineers from mid-level ones. Learn the patterns, trade-offs, and architectural judgment that get you the title, the trust, and the offers.

View course→

React Deep Dive

Move from shipping React apps to understanding why React works. Master concurrent rendering, server components, suspense, and the patterns shaping every serious React codebase.

View course→

Next.js Mastery

You moved to App Router and half your habits no longer apply. Master server components, server actions, and edge runtime, so Next.js stops surprising you in production.

View course→

TypeScript for Real Codebases

Your TypeScript types break the moment a real codebase touches them. Learn generics, conditional types, and narrowing well enough that types help you instead of fighting you.

View course→

Frontend Performance

Your Lighthouse score is bad and you do not know which fix actually matters. Learn Core Web Vitals, INP, hydration, and RUM, so you can move the numbers that decide rankings and revenue.

View course→

Design Systems Engineering

Your team has built three component libraries and nobody uses any of them. Learn the tokens, primitives, and headless UI patterns that get a design system actually adopted.

View course→

Web Accessibility

Accessibility feels like a checklist nobody has time for, until a complaint lands. Learn what a real, accessible product looks like, so a11y stops being a fear and starts being a habit.

View course→

More in Engineering

  • CS Fundamentals→
  • Backend→
  • System Design→
  • Distributed Systems→
  • Databases→
  • QA & Testing→
  • DevOps & Infrastructure→
  • Cloud→
  • Mobile→
  • Security→
  • Web3 & Blockchain→
OMedFirst

Learn

  • Certification Prep
  • Interview Prep
  • Personal Course
  • All categories

Categories

  • AI
  • Engineering
  • Product
  • Data
  • Design
  • Marketing
  • Leadership
  • Founders
  • Sales
  • Career
  • Writing

Octo

  • How Octo teaches
  • Pricing
  • For Business
  • Research Preview

Legal

  • Contact
  • Privacy
  • Terms
  • Cookies
  • Refunds

Get notified when something
new lands on Octo

Occasional updates on new course types, features, and capabilities. No spam.

Reach support: [email protected]

© 2026 MedFirst Learning, Inc.

Professional upskilling, taught by AI.