Merge #833

833: Rename DevMynd to Tandem r=poteto a=mercedesb

In December 2018, DevMynd rebranded as Tandem. Updated list with new
name and website.

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## Add/Update/Remove <CompanyName>

- [ X] I have read the [contributing guidelines](https://github.com/poteto/hiring-without-whiteboards/blob/master/CONTRIBUTING.md)
- [X ] I agree to the [Code of Conduct](https://github.com/poteto/hiring-without-whiteboards/blob/master/CODE_OF_CONDUCT.md)
- [X ] I have followed the [format](https://github.com/poteto/hiring-without-whiteboards/blob/master/CONTRIBUTING.md#format) prescribed in the contributing guidelines
- [ ] (OPTIONAL) In your pull request message, add additional context on the interview process if necessary

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Co-authored-by: Mercedes Bernard <mercedesrbernard@gmail.com>

README.md

@@ -191,7 +191,6 @@ Additions to this document that are properly formatted will automatically be pus
 - [DeSmart](https://www.desmart.com) | Gdynia, Poland | Technical interview, take-home project and talk about your experience
 - [Despark](https://despark.com) | Sofia, Bulgaria & Remote | Culture add interview, sample code review and paid pair programming with team member or take-home project.
 - [Detroit Labs](https://www.detroitlabs.com/careers) | Detroit, MI | Our technical interview starts with a take-home assignment that we will look at during the interview. You'll walk us though your thought process, add functionality if applicable to the interview, and talk about your experience. We believe that showing us your work in a practical setting is more telling of your abilities and what you will bring to the table, than writing code on a whiteboard.
-- [DevMynd](https://www.devmynd.com) | Chicago, IL; San Francisco, CA | Take-home project, take-home project phone review, a few hour-long pairing sessions on real projects.
 - [DG-i](https://www.dg-i.net) | Cologne, Germany | Take-home project and/or discussion on-site about past experiences
 - [DICE](http://www.dice.se) | Stockholm, Sweden | Take-home project and code review at the on-site
 - [Digitally Imported](http://www.di.fm/jobs) | Denver, Colorado & Remote | Video meetings on past experience and high level tech questions, take-home project
@@ -597,6 +596,7 @@ Additions to this document that are properly formatted will automatically be pus
 - [TableCheck](https://corp.tablecheck.com/en/jobs) | Tokyo, Japan | Show us your code! Brief Skype interview and take-home project or pairing for those without code.
 - [Tailor Brands](https://tailorbrands.com/jobs) | Tel Aviv-Yafo, Israel | Discuss knowledge and interests, explore previous work experience, during the technical interview we discuss real-life problems.
 - [tails.com](https://tails.com/careers) | Richmond (London), UK | Live pair programming or take home project with review
+- [Tandem](https://www.madeintandem.com) | Chicago, IL; San Francisco, CA | Introductory phone screen, take-home project, take-home project phone review, a few hour-long pairing sessions on real projects.
 - [Tanooki Labs](http://tanookilabs.com) | New York, NY | Paid half-day take home project with followup review and discussion
 - [Tattoodo](https://www.tattoodo.com) | Copenhagen, Denmark | Takehome exercise
 - [Telus Digital](https://labs.telus.com) | Toronto, Canada; Vancouver, Canada | Discuss knowledge and interest, explore previous work, pair with developers when possible, alternatively take home project.