At Periscope (San Francisco, USA), we make really fast charts and dashboards.
We're constantly making the SQL faster and the charting more powerful. You'll be working on the full stack: from the Go and Java servers managing giant database clusters to the Rails and CoffeeScript frontends.
* In your first day you'll ship new code to production.
* In your first week you'll ship at least one customer-facing feature.
* In your first month you'll write code at every level of the stack, from cache backends to web servers to UI code.
* In your first 6 months you'll rebuild a major piece of the Periscope stack to support our ever-increasing scale.
More: <a href="https://www.periscope.io/data-obsessed-engineer" >
Ask HN: Who is hiring? (January 2015)