We are looking for a more than highly experienced Senior TypeScript Web Developer for a Bitcoin wallet app -- 2

We are looking for a more than highly experienced Senior TypeScript Web Developer who has the necessary skills to work as a Lead Developer with us and is very confident in what they do.

You should have experience with at least the following technologies:
- Node.js
- React.js (client-side rendering)
- Gatsby.js (+ Gatsby Cloud, Gatsby Functions)
- MongoDB
- Jest

Note: There will be an application process and we will test you on your skills beforehand with complicated questions regarding the above technologies, so please be prepared!

It would be an advantage if you have experience in the following technologies:
- Ionic Capacitor
- DevExtreme
- TypeORM
- React Query

It would be beneficial if you have experience with the following platforms:
- Ionic Appflow
- Github Actions
- Github Workflows
- Postman

It would be beneficial if you have experience with the following tools:
- Visual Studio Code
- ESLint
- Prettier
- Git

Do you have experience with Bitcoin? Be sure to let us know!

IMPORTANT NOTE!: We do not work with companies or agencies, only with individuals!

Please solve the following questions and send us a PM with the result:
Memory Management: https://codesandbox.io/s/purple-http-fndzn?file=/src/index.js
TypeScript: https://codesandbox.io/s/inspiring-diffie-b0uxt?file=/src/index.ts
Web Security: https://codesandbox.io/s/wild-bush-nu2xh?file=/src/index.js

Project Details:
We want to create a Bitcoin wallet, where you can send and receive Bitcoins.