Add olist challenge

Author: diegomaranhao

README.md

@@ -44,6 +44,7 @@ Feel free to contribute! Only open-source challenges please!
 | :brazil: | [iFood - 6](https://www.ifood.com.br/) | Any Language, REST API | [Code →](https://github.com/ifood/ifood-backend-payment-test)
 | :uruguay: | [Ingenious](http://ingenious.agency/) | Ruby, .Net, Node.js or Python | [Code →](https://github.com/ingsw-dev/backend-test)
 | :de: | [Join](https://join.com/) | Node.js, Any Framework & SQL Database | [Code →](https://github.com/join-com/coding-challenge-backend-nodejs)
+| :brazil: | [Olist](https://olist.com/) | Python or Go | [Code →](https://github.com/olist/work-at-olist)
 | :us: | [Ontraport](https://ontraport.com/) | Any Language | [Code →](https://github.com/Ontraport/Backend-Test)
 | :brazil: | [Petlove](https://www.petlove.com.br/) | Ruby, Rails & Any Database | [Code →](https://github.com/petlove/vagas/tree/master/backend-ruby)
 | :uk: | [PhotoBox](http://www.photobox.co.uk/) | .NET | [Code →](https://github.com/photobox/Moonpig.Recruitment)
@@ -62,6 +63,7 @@ Feel free to contribute! Only open-source challenges please!
 | :indonesia: | [Xendit](https://www.xendit.co/en/) | Node.js, Typescript | [Code →](https://github.com/xendit/backend-coding-test)
 | :brazil: | [Zé Delivery](https://www.ze.delivery/) | Any Language, GraphQL or REST API | [Code →](https://github.com/ZeLabs/code-challenge/blob/master/backend.md)
 
+
 ## Inspiration
 
 Inspired on [Felipe Fialho](https://github.com/felipefialho)'s [frontend-challenges](https://github.com/felipefialho/frontend-challenges). Kudos!