Add Third Iron (#703)

* Add third-iron.md

* Update README.md

* Fix link to third-iron.md

README.md

@@ -411,6 +411,7 @@ Name | Website | Region
 [The Wirecutter](/company-profiles/the-wirecutter.md) | http://thewirecutter.com/ | Worldwide
 [Theorem](/company-profiles/theorem.md) | https://theorem.co/ | UTC-10 to UTC+2
 [Thinkful](/company-profiles/thinkful.md) | https://www.thinkful.com/ | WorldWide
+[Third Iron](/company-profiles/third-iron.md) | https://thirdiron.com/ | United States
 [TIDY Homekeeping](/company-profiles/tidy-homekeeping.md) ⚠️️ | http://tidy.com/ | United States
 [TimeSpot](/company-profiles/timespot.md) | https://timespothq.com/ | Worldwide
 [Tipe](/company-profiles/tipe.md) | https://tipe.io | USA

company-profiles/third-iron.md

@@ -0,0 +1,33 @@
+# Third Iron
+
+## Company blurb
+
+Creating innovative technologies that help libraries and the researchers they support
+
+## Company size
+
+25 employees, devoted to creating, supporting and selling exceptional software for academic, hospital, corporate, and government libraries
+
+## Remote status
+
+Remote-first since our company began in 2011
+
+## Region
+
+US-based company with employees in the US and UK - currently interested in future teammates with US work authorization
+
+## Company technologies
+
+* NodeJS, Postgres, CouchDB, TypeScript, AWS, Heroku, Elasticsearch for web front-end and back-end
+* Swift + Obj-C for our native iOS app, and Java for our native Android app
+* [See our entire stack on StackShare](https://stackshare.io/third-iron/third-iron)
+
+## Office locations
+
+None! Unless you count each of our homes :blush:
+
+## How to apply
+
+Check out our careers page: https://thirdiron.com/careers/
+
+If you don't see an opening, always feel free to email careers@thirdiron.com