1. We're a small company with an early product that's exploding in popularity. We had the highest revenue of any pre-demo day YC company and have investment from SV Angel, Paul Buchheit (the inventor of gmail), and others.…

  2. We are looking for a leading backend engineer with experience of building large systems. About us: - We love Linux, server clusters, big data, distributed everything, task queues and network protocols. - Our favorite…

  3. We are looking for several hackers to work with us in the Mountain View area. We are a profitable software company founded by two hackers who are working to change healthcare in America by giving physicians software…

  4. We are a location based social network looking to "Connect the Unconnected world around you." We are backed by YC (starting in January) and are looking to add team members NOW (designers and hackers) to be part of it…

  5. We a social gaming startup, that is what Pokemon would look like if they started today. We soft launched two weeks ago, and are currently growing 10% a day. The founders are the youngest YC has ever funded, and are…

  6. I'm a YC Winter 2011 batch startup. I have a single founder. He's called pclark. But he's technical and a pretty nice guy so I don't feel like him flying solo will spook awesome people too much. He's spent the past 2.5…

  7. // NowJS, Y Combinator W2011 company, is hiring employee #1 and interns. var nowjs = require("hiring"); // Preferred Skills everyone.now.preferredSkills = function(){ Understanding of web technology Experience with…

  8. We're an unannounced YC company, but you may have heard of us (millions have). We're profitable, and we're looking to hire a smart all-around programmer as our first hire. It's a cliche, but we want people who like…

  9. We’re using a transparent marketplace to disrupt the tutoring industry ($7B in the US and counting). Billed by TechCrunch as the “Airbnb of tutoring,” we’re helping parents bridge the gap between the tutor they want for…

  10. If you are a single founder and din't find the right co-founder, you should consider joining an awesome team instead. If your team din't make the cut, we might be able to hire your whole team. (if we find the finest of…

  11. WakeMate recently launched, took pre-orders and then took some angel funding. Now we need to finish building out our product and because of the overwhelming amount of orders we received we need some help. Here is our TC…

  12. =The Project= Hi. I'm Sam. I'm building a better photo sharing site. The site will enable the seamless transfer of hi-res photos among friends. Here's the demo of our photo sharing site that we included with our YC…

  13. We are a well-funded-but-stealth YCombinator company solving a fundamentally fun and hard problem in the system software space. There are two of us today and we're looking to hire Engineers #1 and 2 to help us expand…

  14. I'm currently a single founder (technical) of a Winter 2011 YC company looking for another technical founder to be CTO. I’ve built and designed the site from scratch and am looking for someone to accelerate development.…

  15. dropbox is a YC startup in SF (we've since been funded by sequoia and accel.) we want to be the way the world stores and shares files, and we're well on our way. from the blurb: "We're looking for someone great to join…

  16. Hi! We're a two person company (one dev, one biz) looking for our first engineering hire, starting as soon as possible. This position is onsite in San Francisco; we have shared office space in SOMA. Experience in web…

  17. Heroku (YC W08) is transforming the way people build and deploy applications. We’ve got a fun and wicked smart crew of 25, a hacker-driven company culture, and a sweet office in San Francisco. Come help us change the…

  18. We were in the YC Winter 09 batch and took a small round of funding out of demo-day to keep us going while we worked on developing and testing our product and building relationships in the travel industry. We've been…

  19. We're RethinkDB (YC S09). We're building a database optimized for solid-state drives and are looking for a technical cofounder to join our team. What you get: - A significant equity stake. - Very interesting and…

  20. WakeMate (http://wakemate.com) is dedicating to improving the way people sleep. We're taking algorithms and ideas developed in sleep labs and bringing them to mainstream consumers in a low cost, easy to use way.…

  21. Scribd launched less than two years ago, and has grown around 25% per month since then - that's somewhere in between the growth rates of Facebook and YouTube. For the month of January 2009, we're expecting to end the…

  22. Chart.io is a Y Combinator (W10) company that is changing the future of business analytics. Basically, we're Google Analytics for databases. Our goal is to give every small and medium sized (and eventually big) business…

  23. We’re a San Francisco-based startup addressing a huge market with a groundbreaking product, early success, and a passionate founding team. We are building products at the intersection of phones and the web, with the…