500px.com, Toronto
We are looking for a senior, performance-driven full-stack Web developer who can help us to bring 500px to the next level in terms of scaling, speed, and user experience. Check out other dev positions at <a href="http://500px.com/jobs" >
About us:
  500px is an award-winning online community for the sharing, discovery, buying and selling of high-quality photography. Check out http://500px.com/popular

About you:
  - 5+ years of experience with high traffic websites, SQL and NoSQL databases, distributed systems and large data analysis
  - Passionate about writing high-quality, maintainable and robust code
  - Strong knowledge of Ruby on Rails, JavaScript and C, or the ability to learn them quickly
  - Solid understanding web technologies including HTTP(s), RESTful services, HTML5
  - Software development tools (git, bug tracking) and *nix environment

We need help with:
  - Designing, implementing and optimizing products and services used by millions of users.
  - Improving real-time algorithms for photos rating, image recognition, content recommendations and spam detection
  - Building highly scalable API services
  - Bringing beautiful UI/UX designs to life