Promise.all to the Rescue
Frontend
Debugging

Are your async/await calls slowing your app without you even knowing? Having your async requests block execution is a classic performance pitfall. Learn how to identify when this happens and how you can use Promise.all to optimize your code to be more performant.

Looking for a different quest?

A Brief Orientation

Wilco is where devs like you acquire, practice, and master new skills using a real-life tech stack. Our hands-on developer challenges look and feel like real work tasks, including things like PRs and cloud deployment. While Sierra is just an experiment, the main Wilco catalog already helps engineers and companies around the world.

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What our community is saying

"I am a software developer with experience in Front-end , I tried Wilco to start my journey as a full stack developer, I loved the practical approach of teaching/ skill development on industry level provided by this platform. I learned Python, Monitoring and Backend and eagerly waiting for new quests to open."

Prasoon Mahawar

Software Developer

"Wilco gives me the opportunity to challenge myself in a joyful and meaningful way that was hard to reach otherwise as a junior developer."

Oryam Nehoray

Web Developer @ Webiya

"Learning the fundamentals of Git and GitHub was super confusing when I first learned to code. I didn't experience many situations where I'd open pull requests and collaborate with a team. Wilco simulates that environment and enables new developers to gain knowledge of industry standards."

Rizel Scarlett

Developer Advocate @ Github

"Wilco completely succeeds in what it sets out to be: a realistic simulation of integrating a junior developer into a company. The guided approach to all of the traditional first steps (setting up an environment, contributing to the first task...), makes it easy to feel the sense of progress while still giving lots of room to explore and try to figure things out on one’s own."

André Ferreira

Bootcamp Instructor @ Ironhack
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