Zulip is an open source team chat product, with dozens of weekly active contributors, and an experienced core leadership based in SF (https://zulipchat.com/team/). You can check out the product at the Zulip community server, https://chat.zulip.org.
Pay is competitive. One of the big perks of working for Zulip is that all of your work will be open sourced and available forever.
Email us at email@example.com with a resume/portfolio, and we'll take it from there. Women and minorities encouraged to apply.