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Show HN: Diamodel – Estimate T1 Diabetes parameters from data

https://github.com/gmbit-co/diamodel

Hey HN!Currently, the key parameters for Type 1 diabetes management, like Insulin-To-Carb ratio (ICR) and Correction Factor (CF), are estimated manually by eyeballing historical charts and making a subjective guess about what the "true" values should be.There is a lot of uncertainty and noise in the data itself, so the estimation task is hard even for Diabetic doctors.I thought there had to be...

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Re:Ask HN: Who is hiring? (April 2016) on Friday April 01, 2016 @11:04AM (#11405280)
500px | Toronto, Canada | Full time | Onsite

500px is a photo community and marketplace for discovering, sharing, buying, and selling inspiring photography powered by creative people around the world. We are well funded, backed by great investors and the company is growing super fast. Join us and help us build the very best place to show and sell photos.

Our architecture is a Ruby on Rails monolith surrounded by a constellation of Go based microservices. There are a wide variety of technologies and distributed systems in use, and you will always be welcome and encouraged to learn something new and touch any part of the stack. We are passionate about what we ship, we care deeply about our craft and our users, and absolutely everything at 500px is made with love.

We are hiring many roles and disciplines, but we are especially looking for:

  * Devops and site reliability engineers
  * Backend and frontend engineers
  * Data engineers
  * Tooling engineers
Check us out and let's build something cool: https://about.500px.com/jobs/
Re:Ask HN: Who is hiring? (September 2015) on Tuesday September 01, 2015 @02:29PM (#10154629)
http://500px.com, Toronto Downtown, Fulltime

We value small teams, engineering-friendly culture, beautiful design and getting things done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior DevOps Engineers to help us grow our infrastructure, 
    build new tools and automation, provide expert advice on 
    building robust systems at large scale, and work with cutting 
    edge technologies like Docker and Kafka.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (August 2015) on Monday August 03, 2015 @08:20PM (#10000865)
http://500px.com, Toronto Downtown, Fulltime

We value small teams, engineering-friendly culture, beautiful design and getting things done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior DevOps Engineers to help us grow our infrastructure, 
    build new tools and automation, provide expert advice on 
    building robust systems at large scale, and work with cutting 
    edge technologies like Docker and Kafka.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (July 2015) on Wednesday July 01, 2015 @12:19PM (#9813003)
http://500px.com, Toronto Downtown, Fulltime

We value small teams, engineering-friendly culture, beautiful design and getting things done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior DevOps Engineers to help us grow our infrastructure, 
    build new tools and automation, provide expert advice on 
    building robust systems at large scale, and work with cutting 
    edge technologies like Docker and Kafka.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (June 2015) on Monday June 01, 2015 @11:23AM (#9639287)
http://500px.com, Toronto Downtown, Fulltime

We value small teams, engineering-friendly culture, beautiful design and getting things done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior DevOps Engineers to help us grow our infrastructure, 
    build new tools and automation, provide expert advice on 
    building robust systems at large scale, and work with cutting 
    edge technologies like Docker and Kafka.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:How 500px serves up 500TB of high res photos on Saturday May 16, 2015 @09:22AM (#9555995)
we still have "Display Adult Content" flag that can be disabled on https://500px.com/settings
Re:How 500px serves up 500TB of high res photos on Saturday May 16, 2015 @09:19AM (#9555991)
performance is the main reason. Additionally we needed a solution to modify images on the fly (watermarking and attribution). That's why we decided to build our own service using go
Re:How 500px serves up 500TB of high res photos on Saturday May 16, 2015 @09:06AM (#9555944)
bingo! Extra storage for all the resized images that never get seen, lack of flexibility to introduce new sizes, plus requirements for watermarking and attribution on images are the main reasons why we are moving away from pre-conversion to dynamic image resizing
Re:How 500px serves up 500TB of high res photos on Friday May 15, 2015 @09:05PM (#9554577)
Performace is the reason why we switched from ImageMagick
Re:How 500px serves up 500TB of high res photos on Friday May 15, 2015 @09:04PM (#9554572)
I'm the CTO of 500px. Decoupling uploaders and converters simplifies the overall design and makes it more robust. Converters are a part of the legacy design that we are planning to retire. In the past, we would generate multiple sizes and crops for every image so it can be efficiently displaced on the site and/or mobile apps.

Today, we rely on the new Resizer service that can resize and crop images on the fly. It's an interesting piece of technology that we will be writing about on our blog: developers.500px.com

Re:Ask HN: Who is hiring? (May 2015) on Friday May 01, 2015 @11:54AM (#9472272)
http://500px.com, Toronto Downtown, Fulltime

We value small teams, engineering-friendly culture, beautiful design and getting things done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior DevOps Engineers to help us grow our infrastructure, 
    build new tools and automation, provide expert advice on 
    building robust systems at large scale, and work with cutting 
    edge technologies like Docker and Kafka.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (April 2015) on Wednesday April 01, 2015 @10:33AM (#9303865)
http://500px.com, Toronto Downtown, Fulltime

500px is a photo community. Every month, millions of people use the 500px.com website and mobile apps to find and engage with the world’s most inspiring photography.

We value small teams, engineering-friendly culture, beautiful design and getting shit done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px, http://developers.500px.com/.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.
What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (March 2015) on Sunday March 01, 2015 @10:57AM (#9127494)
http://500px.com, Toronto Downtown, Fulltime

500px is a photo community. Every month, millions of people use the 500px.com website and mobile apps to find and engage with the world’s most inspiring photography.

We value small teams, engineering-friendly culture, beautiful design and getting shit done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Kafka, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px.

We are looking for:

  - Senior/Intermediate Web Developers to help us solve 
    scalability challenges, build beautiful UI/UX, improve
    search and rating algorithms, implement machine learning 
    and vision solutions.
  - Senior/Intermediate Mobile Developers to help us build 
    500px iOS and Android mobile products for capturing, 
    editing, licensing and engaging with beautiful 
    photography.

What we offer:

  - hard technical challenges
  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice

Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (February 2015) on Sunday February 01, 2015 @10:40AM (#8980235)
http://500px.com, Toronto Downtown, Fulltime

500px is a photo community for premium photography. Every month, millions of people use the 500px.com website and mobile apps from around the world to find the world’s most inspiring photography.

We value small teams, engineering-friendly culture, beautiful design and getting shit done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Kafka, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px.

We are looking for:

  - Senior Web Developers to help us solve scalability challenges, build beautiful UI/UX, implement machine learning and vision solutions.
  - Senior Mobile Developers to help us build 500px mobile products for capturing, editing, licensing and enjoying beautiful photos

What we offer:

  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice

Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (December 2014) on Monday December 01, 2014 @03:43PM (#8683650)
http://500px.com, Toronto, Fulltime

500px is a photo community for premium photography. Every month, millions of people use the 500px.com website and mobile apps from around the world to find the world’s most inspiring photography.

We value small teams, engineering-friendly culture, beautiful design and getting shit done. Our technology stack includes: RoR, Go, Backbone/Marionette, Elastic Search, Mongo, Redis, MySQL, Kafka, Chef, AWS, Hadoop, Python for Machine Learning. Check out https://github.com/500px.

We are looking for Senior Web Developers to help us solve scalability challenges, build beautiful UI/UX, implement machine learning and vision solutions.

What we offer:

  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice

Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (November 2014) on Saturday November 01, 2014 @05:56PM (#8544771)
http://500px.com, Toronto, Fulltime

500px is a photo community for premium photography. Every month, millions of people use the 500px.com website and mobile apps from around the world to find the world’s most inspiring photography.

We value small teams, engineering-friendly culture, beautiful design and getting shit done. Our technology stack includes Ruby on Rails, Go, Javascript, Python.

We are looking for Senior Web Developers to help us solve scalability challenges, build beautiful UI/UX, implement machine learning and vision solutions.

What we offer:

  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - computer/laptop of your choice
Apply here: http://500px.com/jobs
Re:Ask HN: Who is hiring? (October 2014) on Wednesday October 01, 2014 @02:55PM (#8396834)
http://500px.com, Toronto, Fulltime

500px is a photo community for premium photography (http://500px.com/popular). We value small teams, engineering-friendly culture, beautiful design and getting shit done.

Who we are looking Senior Android Developers to help us build cutting-edge, native Android apps that change how our four-million photographers take, share, view and license photography

What we offer:

- competitive salaries

- flexible work hours

- unlimited vacation

- free lunches

- medical insurance

- computer/laptop of your choice

Apply here: http://500px.com/jobs

Re:Ask HN: Who is hiring? (September 2014) on Tuesday September 02, 2014 @10:01AM (#8257576)
http://500px.com, Toronto, Fulltime

500px is a photo community for premium photography (http://500px.com/popular). We value small teams, engineering-friendly culture, beautiful design and getting shit done.

Who we are looking for: 1. Senior Android Developers to help us build apps for creating and enjoying inspiring photography 2. Senior Web Developers to help us solve scalability issues, engineer microservices and implement beautiful UI/UX

What we offer: - competitive salaries - flexible work hours - unlimited vacation - free lunches - medical insurance - computer/laptop of your choice

Apply here: http://500px.com/jobs

Re:Ask HN: Who is hiring? (August 2014) on Friday August 01, 2014 @02:25PM (#8121973)
http://500px.com, Toronto, Fulltime 500px is a photo community for premium photography (http://500px.com/popular). We value small teams, engineering-friendly culture, beautiful design and getting shit done.

Who we are looking for: 1. Senior Android Developers to help us build apps for creating and enjoying inspiring photography 2. Senior Web Developers to help us solve scalability issues, engineer microservices and implement beautiful UI/UX

What we offer: - competitive salaries - flexible work hours - unlimited vacation - free lunches - medical insurance - computer/laptop of your choice

Apply here: http://500px.com/jobs

Re:Ask HN: Who is hiring? (December 2013) on Thursday December 05, 2013 @05:20PM (#6857772)
http://500px.com, Toronto

500px is a photo community for premium photography. Check out http://500px.com/popular

We are looking for:

1. Senior Android Developers to help us build apps for Android based devices such as cameras, smartphones and TVs

2. Senior Web Developers to help us with scalability issues, API, new features and chinese spammers

What we offer:

  - competitive salaries
  - flexible work hours
  - unlimited vacation
  - free lunches
  - medical insurance
  - any computer/laptop

Apply here:

http://500px.theresumator.com/apply/YiIWfi/Senior-Android-De...

http://500px.theresumator.com/apply/N9l8cp/Senior-Web-Develo...

http://500px.com/jobs

Re:Ask HN: Who is hiring? (November 2013) on Monday November 11, 2013 @03:54PM (#6713951)
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 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