Added AirBnB, AeroFS, MixMax and Polar (#271)

README.md

@@ -29,6 +29,7 @@ I'm in the process of extracting everything into an Airtable sheet. You can view
 - [Aiwip](http://aiwip.com) | London, UK | Skype/phone interview followed by takehome project or worksample (or whiteboard)
 - [Accredible](https://www.accredible.com/careers/) | Cambridge, UK / San Francisco, CA / Remote | Take home project, then a pair-programming and discussion onsite / Skype round.
 - [AdWyze](https://angel.co/adwyze/jobs) | Bangalore, India | Short takehome project + (for fulltime) onsite pairing
+- [AeroFS](https://www.aerofs.com/company/careers/) | San Francisco, CA | Short takehome project + phone interview
 - [AgileMD](https://angel.co/agilemd/jobs) | San Francisco, CA | Takehome project
 - [Alluvium](https://alluvium.io) | Brooklyn, NY | Take-home assignment, on-site review dovetailing into collaborative project planning for extension.
 - [Applied](https://www.beapplied.com) | London | Situational judgement tests focusing on real-world soft skills (online then in structured interview)
@@ -40,6 +41,7 @@ I'm in the process of extracting everything into an Airtable sheet. You can view
 - [Algolia](https://www.algolia.com/careers) | Paris, France / San Francisco, CA | Takehome project & Onsite discussions and presentation
 - [AlphaSights](https://engineering.alphasights.com/) | London / New York / Remote | Initial interview, pair programming then final round with general technical questions
 - [Arachnys](https://angel.co/arachnys/jobs/220465-software-engineer) | London, UK | Take home test, real world pair programming
+- [AirBnB](https://airbnb.com/careers) | San Francisco, CA | Short phone interview followed by pair programming Skype interview on a problem similar to daily work
 - [Articulate](https://articulate.com/company/careers) | 100% remote | Take-home project & pair program on a problem similar to daily work
 - [ASI Data Science](https://www.asidatascience.com/careers) | London, UK | Project to work at home, general technical questions, pair programming with engineers
 - [Avant](https://avant.com/jobs) | Chicago, IL | Pair programming interviews.
@@ -176,6 +178,7 @@ I'm in the process of extracting everything into an Airtable sheet. You can view
 - [Maxwell Health](https://www.maxwellhealth.com/careers) | Boston, MA | Take-home exercise or pairing session with team. Then conversational meetings with members of the team.
 - [Media Pop](https://mediapop.co) | Singapore | Take-home or unsupervised (onsite) real-world assignment
 - [Mercatus](https://www.mercatus.com/company/careers/) | Toronto, Canada | Practical on-site project similar to daily work
+- [MixMax](https://mixmax.com/careers/) | San Francisco, CA | Takehome assignment purely based on their platform, followed by phone interview
 - [MokaHR](http://mokahr.com) | Beijing, China | Take home project/challenge, then on-site programming session taken from problems we encounter at work
 - [Moneytree Front-end Web Team](https://moneytree.jp) | Tokyo, Japan | Pair programming exercise and social gathering with team
 - [Mutually Human Software](https://www.mutuallyhuman.com) | MI, OH, WA | Collaborative problem analysis and design exercise, pairing exercise
@@ -215,6 +218,7 @@ I'm in the process of extracting everything into an Airtable sheet. You can view
 - [Pivotal Labs](https://pivotal.io/careers/engineering) | HQ: San Francisco, International | Remote Pairing, and full day on-site pairing
 - [Pluralsight](https://www.pluralsight.com/careers) | UT, CA, MA, FL | Takehome exercise & pair programming session
 - [Poki](http://jobs.poki.com) | Amsterdam, the Netherlands | Pair programming on-site w/ two engineers where we focus on teamwork, googling relevant documentation and fixing things together.
+- [Polar](http://polar.me/company/careers/) | Toronto, Canada | Phone interview, followed by 1-2 onsite pair-programming interviews based on their platform
 - [Popstand](http://www.popstand.com) | Los Angeles, CA | Build MVPs for startups
 - [Pragma Team](https://pragma.team/talent) | Sydney AU | Engineering Consultancy And Delivery - Takehome exercise & discussion
 - [PremiumBeat](https://www.premiumbeat.com/careers) | Montreal, Canada | Discussion and general, high level questions