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Daniel Doubrovkine

aka dB., CTO at artsy.net, fun at playplay.io, NYC

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2018

Slava: a Slack Bot for Strava

How to Write a Great CTO Job Description

In Conversation with Andrew Russeth, ARTNews

Enabling SSL on Github Pages

Auto-Publishing Strava Runs to Github Pages

State of the Art Podcast: How Art Will Make Us Human

2017

Google Finance Web API Ruby Client

Sotheby's Institute: Mass Appeal - Tech's New Role in Art Collecting and Fundraising Panel

Generating and Handling Errors in GraphQL in Ruby

How To Do Startup Technical Due Diligence

Past, Present and Future of Art & Technology Panel at HG Contemporary

Building and Consuming a GraphQL API with Ruby on Rails

Artsy Overview for Coalition for Queens and Q&A

Introducing S'Up for Slack Teams

The Future of Art (Market) on the Blockchain

A Curriculum for Teaching how to Solve a 3x3 Rubik's Cube

Grape Framework 1.0 Released

Writing Data to Amazon S3 from Apache Spark

The Future of Art

Getting Started with Spark, Hadoop, HDFS and Hive

What's the simplest way to parse JSON in Scala?

The Demonic Possession of Hashie::Mash

Building a Simple Alexa Skill in Node.js (Live Code)

Installing, Starting and Waiting for ElasticSearch in Travis-CI

Building an Alexa Skill to Play Your Podcast

The AlexaJS Community Organization

2016

Art Basel Miami 2016: The Art World Is Officially Online

Hacking on Multiple Amazon Echos (Alexa)

MIT Hacking Arts 2016 Hackathon

MIT Hacking Arts 2016 Conference

Interview at NASDAQ

Use Open-Source to Pivot Around Your Hiring Problem

The Mongoid Community Organization

Phone Screens are Harmful and The Benefits of the Informational Interview

Democratizing the Art World Without Pitchforks

Obj-C Core Data View

Very Slow MongoDB in Development and Test

Should a CTO be technical?

How To Write Your Code Bootcamp Academy Resume

A Directory Structure for OSS and Work Github Clones

Your First Slack Bot Service (Video)

Backing up MongoDB Databases in Dokku Containers to Dropbox

What do Software Engineers Do?

Running Slack Bots on DigitalOcean with Dokku

Why does Slack API rtm.start send you all this data?

Downgrading a Yum Package with Chef

When Robots Die - Slack account_inactive and Closed Connections

Slack API Explorer and ShellBot (aka Shlack)

2015

PlayPlay.io: Ping Pong, Chess, Pool and Tic-Tac-Toe Slack Bot

Writing a Slack Bot running on Rails (with React)

Zooming Out to Give Away Your Legos

Writing a Slack Bot Service for Multiple Teams

How To Test Delayed Jobs

Passing Tests with Volkswagen

Docker-machine Hangs on Start: Testing TCP Connection

MIT Hacking Arts 2015

The Missing CTO and the IKEA Customer Service

Turning Hindsight into Foresight

Lazy Each in Ruby MRI vs. Rubinius

Getting Out of Your First Git Mess

Connecting People to Enable Magic

The New Ruby Grape

Creating Thinking Time while Walking to Work

Getting Things Done with Mongoid 5

Offering Time to The Team

The Easiest Way to Write a Slack Bot in Ruby

What does a CTO do?

A Roadmap for Hiring Engineering Teams

We don't poach each-other's engineers. It's a New York thing.

What is the difference between a CTO and a VP or Head of Engineering?

Join Us at NYC Tech Slack

Slack Bot Real Time Messaging API Integration in Ruby Tutorial

Your First 60 Days at an Engineering Job

ActionMailer Integration Testing with Email-Example-Spec

Open-Sourcing the Artsy Engineering Compensation Framework

Becoming Open Source by Default

CTO Cast Podcast: Open Source (Russian)

Remote Engineering, Cultural and Technical Diversity

How to Move Jekyll Posts Across Sites: Handling Redirects

First Class Mongoid Queries with Collection Snapshots

Verifying a Jekyll Site With Keybase.io

How to Make Recruiter Spam Useful: My Canned Response

The New code.dblock.org Powered by Jekyll

2014

Designing a Hypermedia API with Grape & Roar

Video: Mentoring Engineers and Humans

I Want to Contribute to Open-Source: Where do I Begin?

Taking Over Someone Else’s Open-Source Projects

Syntax Highlighting in Markdown Content with Recarpet, Coderay and Rails

The Other Side of Your Interview

Golden Gate Ruby Conference 2014

Serving Hypermedia with a Grape API and Roar

Swissnex: Swiss Startup Lunch

Anatomy of a Ruby Gem: Grape

Tiling and Zooming ASCII Art

When do you need to hire a designer?

Why One Giant Source Control Repository Is Bad for You (and Facebook)

Hex, Crayola and iOS7 Colors with EDColor

Pod5 Podcast

Reorganizing CocoaPod Folder Structure for Unit and Integration Testing

Mapping and Tiling on iOS

Your First CocoaPod

iOS UIView with an Image and Text with Dynamic Height

Mocking UIAlertView with OCMock

Debugging XCTool’s NSInternalInconsistencyException: Failed while trying to gather build settings for your scheme

dotNetInstaller 2.3 Released

American Horror Story and Entitlement in a Job Interview

2013

Ruby Enumerable Detect with Value

Custom RSpec Meta Tag Validator

ld: library not found for–lXext installing RMagick on Mavericks

Grape Mounted behind Goliath

Social Coding: Beyond Trolling Healthcare.gov

Error: No such module on process.binding

EdgeConf 2013 NYC

Recap of the StrangeLoop 2013 Conference in St. Louis

Making HTTPs Requests in Ruby & JavaScript w/ Node.js

10 Largest Collections in a MongoDB Database w/ Mongoid

Precompiling Rails Assets before RSpec/Capybara Integration Tests

Evolving APIs using Grape API Versioning

My Pathological Fear of Deadlines

Mentoring 101

How To Reject Engineering Candidates

Building & Scaling a Test-Driven Culture @ AppNexus (Video)

Being Helpful with Ruby Exceptions and Error Messages

Your First Ruby Gem

Calculating the Gifted and Talented Percentile Rank

Grape vs. Poncho

Doctors, Surgery and Open-Source

5 Anti-patterns in a College Grad Engineer’s Resume

Grape 0.4.0 Released w/ Stricter JSON Format Support & More

ResourceLib 1.4 Released

Graduating to Jenkins CI for Ruby-on-Rails Teams - Jenkins User Group in NYC (Video)

In Defense of Heroku

Data Corruption Is Most Likely Caused By Your Code And Not Your Database

Three DevOps Rake Tasks I Use Daily on Heroku with MongoDB

Should you use 'Should' in RSpec Examples?

Hacker News Karma: 666

Why I am Excited About the new Cornell Tech School

Open-Source Roundup for Early January 2013

Help Me Fix Tech Recruiting: Become a Recruiter

2012

10 Things Engineers and Non-Engineers Can Do to Make a Website Faster

Treat Every Line of Code as If It's Going to be Thrown Away One Day

Losing Control to the Heroku PaaS

Migrating from a relational to a NoSQL cloud database?

Five Ways to Torture Candidates in a Technical Interview

Measuring Performance in Grape APIs w/ NewRelic RPM

Debugging 'object has no properties' in a MongoDB map/reduce

TaxCloud: SOAP Service Integration in Ruby

Slow Migration to Mongoid::Slug 2.x

New York Times Open Source Science Fair

Hack 0-60 in Startup Tech

The Safety Net: Removing Barriers to Test Automation

AgileDC 2012: Taming the Testing Beast

WAFFLE 1.5 Released

JNA 3.5.0 Released

The tech? It just worked. Thanks AWS!

How do I get the name of an object’s type in JavaScript?

Serkan Piantino on Scaling Facebook News Feed and Ken Little on Scaling Tumblr

Single Sign-On: Servlet Negotiate Security Filter (Kerberos + NTLM) w/ Waffle and Jetty

5 Ways to Avoid Feature Branches

dotNetInstaller 2.2 Released

VMWareTasks 1.7 Released

RSpec-Rerun Gem

Returning a Sample Set from a Mongo Collection w/ Mongoid

Wrapping Responses with Grape and Rack

GoRuCo 2012: From Zero to API Cache w/ Grape & MongoDB in 10 Minutes (Video)

5in5 NYC Episode 7

Why I Love Code Reviews

Jenkins AnsiColor 0.3.0 Released

MongoNYC 2012: Using MongoDB to Build Art.sy - Video

Community MSI Extensions 1.3 Released

ResourceLib 1.3 Released

Pressing the Big Scary Red Reset Button

How Not to Rewrite Everything

How to Cross the Chasms of Your Technology Career

You Have to Stop Saying Your Experience is Under NDA in Interviews

Grape 0.2.0 Released

Paging and Iterating Over Large Mongo Collections

How To Convert Numbers Into Words in Ruby (with numbers_and_words)

VMWareTasks Moved to Github

Avoiding Production Disasters and The Value of Patience in Software Development

Full Client-Server Negotiate SSO in Java w/o a Web Server using WAFFLE

How Long Does it Take to Create a 12 Lecture, 8 Week Course

Crafting a Ruby on Rails Course for Developers

How to Redirect Bang Hash Urls

Why You Should Leave Microsoft, Too

Github Hacked: Things to Do on Monday

Waffle @ NYJavaSIG

Watching Rack Application Changes with Guard-Rack

Grape API Mounted on RACK w/ Static Pages, Tests, JQuery UI, Backbone.js and Even Mongo

Don’t Hate UI Testing - Reliably Testing Asynchronous UI w/ RSpec & Capybara

Toyota Production System & Why Should Architects Write Code

Updating Devise Trackable Last User Sign-In Time with Devise Rememberable

Jenkins AnsiColor 0.2.1 w/ Support for Conceal Codes

CarrierWave: DelayJob-Processing of Selected Versions, Revisited

Testing w/ Analytical Gem and RSpec

Grape API Mounted on RACK w/ Static Pages

How Art.sy uses Github to Build Art.sy

Octopress: Setting up a Blog and Contributing to an Existing One

Octopress: Blogging Evolution

Paginating w/ Mongoid 2.4.0, MongoMapper and Kaminari

Warning: Toplevel Constant XYZ Referenced Admin:XYZ

Fabricating Spec Failures

2011

Blame it all on MongoDB

Grape vs. Webmachine

Measuring Activity in Open-Source Projects using Github Network Graph

Grape: Describing and Documenting an API

Pushing Assets to S3 w/ Rake: Versioning and Cache Expiration

Serving Compressed Rails Assets from S3 via Cloudfront

Sensations Fortes: Deploying Software from Airplanes

dotNetInstaller 2.0 Released

Me in Wired: Art.sy’s ‘Genome’ Predicts What Paintings You Will Like

Favorite Talks from QConfSF 2011

Oh BetaBeat: Me in New York’s 20 Most Poachable Techies

At QConSF 2011

Me @ Silicon Alley Talent Fair on NY1

Alla Klein: A Fake Person In Charge of Customer Support

NYC.rb: Building RESTful APIs w/ Grape

Rendering Markdown Documents in Rails

Don’t Use MongoDB?

Corporate America: How to Let Great Engineers Go

Grape: Routing Multiple Methods

Filtering by User-Agent in Rails

Using GCC to install Ruby w/ RVM on Mac OSX Lion

Moving to New York? All You Need is the Tech Made in NYC List

Making Agile Technology Choices

NoRails: Application Design in Times of APIs

Mongoid 2.0.2, Mongo + bson + bson_ext 1.4.0 and 1.4.1

Ubuntu 11.10 and Back

Sorting Tables in Rails w/ Mongoid

Migrating from CodePlex SVN to Github

Eye&Mind Interview

Oracle Didn’t Learn From the Redhat Experience, PRs a NoSQL Database

Mongo Boston 2011

Capybara: Failed to Resynchronize, Ajax Request Timed Out (not caused by green elves)

Mongo Boston – October 3rd Cambridge, MA

CarrierWave: DelayJob-Processing of Selected Versions

New Relic: Performance Instrumentation with Grape API

Mongoid Collection Snapshot

Just Say 'No' To Mailing List Spam by Recruiters (Continued)

Rails Editable Mail Templates w/Preview from 37Signals

IE9: Cache-Busting with Grape Middleware

Being Lazy: Using the Ruby driver to connect to MongoDB

Just Say 'No' To Mailing List Spam by Recruiters

Rails: Custom and Editable Mailer Templates in Markdown

Implementing My First Jenkins Plugin: AnsiColor

Jenkins: Running RoR Builds w/ Bash & RVM

Autoconf: Maybe the First Example of Microsoft Pushing Features into the OS to Kill a Competitor

Blast From The Past: Jade

JQuery Konami Komando

The Jenkins AnsiColor Plugin You’ve All Been Waiting For

Barista: Custom Preambles in CoffeeScript => JavaScript

Deploying Latest to Heroku with Jenkins CI

Exporting Data to Excel in Ruby on Rails w/ Spreadsheet and to_xls

CIJoe => Jenkins CI

Permission denied - /var/tmp/ruby-uuid

Committing CIJoe Runner Configuration into Git

Installing a Specific Version of NodeJS, NPM and CoffeeScript

Embedding API Sandboxes in Documentation

Contribute to any of these open-source projects and I will help you in any way I can

Unable to Obtain Stable Firefox Connection in 60 seconds: Downgrading Firefox on Ubuntu

Happiness is MongoDB: Slides from MongoNYC Meetup

RSpec: Fuubar + Breaking Tests into Suites

Selecting items from a dropdown with Capybara, Selenium (Firefox) & JQuery

No app specified: telling Heroku gem what its default --app should be

Rubber Ducky Branch

DBlog: Implementing Skeleton CSS Boilerplate

Modularizing a RoR Grape API: Multiple Versions

Introducing Gem-Licenses: Collect 3rd Party Licenses in RoR Projects

Enginelopers and Devengeers: How do You Title Engineering Hires?

Modularizing a RoR Grape API

DBlog: Implementing Blog Post Slugs in .NET

Open-Source Is Simply Part of my Team’s Job Description

Github is Your New Resume

Storing Server-Side JavaScript Functions w/ Mongoid + Weekly Rollup

Sitting is Killing You? Move to New York

Pragmatic Replacement for the Vendor-Based, Bureaucratic and Soviet Style Technology Decision Makings

Mongoid 2.0.2 Dropped Pagination => Kaminari

Non-Traditional Methods of Choosing Technology for a Software Project

Slides from 'Choosing Technology'

Moving to New York: a Guide for Software Engineers

FoodCandy.com: Pulling the Plug

Waffle 1.4 Released

RSpec + Capybara Don’t Return a Proper Exit Code

How we Upgraded a Live Site in the Middle of Demo (and Didn’t Die of a Heart Attack)

JNA is now a Githubber

Internet Explorer Refuses to read CSS from S3/CloudFront

Git: Deleting Merged Branches

Compass: Invalid US-ASCII character 'xE2'

Svn2Svn 1.2 Released

Delaying Image Processing on Heroku with delayed_job

Why Microsoft Should Open-Source Skype

Dear California Engineer - Your Commute is Killing You? Move to New York!

RoR Win: 'Getting Things Done' with MongoDB Mongoid

Your Startup’s Technology: 0-60 @ Internet Week

Capitalizing on the LinkedIn IPO: Avoiding Short Term Personal Stock Loss

:Slow Rails server in development? => :rails_development_boost

Improving tags map/reduce with MongoDB 1.8.x

Rails + S3 + Cloudfront + Jammit + Heroku + 100 грам

Grape: API Authentication w/ Devise

Grape: trapping all exceptions within the API

Thinking open source: How startups destroy a culture of fear

Blast from the past: working versions of XReplace-32 and Expression Calculator

0-60 In Startup Tech: Slides

Summer Math and Engineering Internships @ Art.sy

Wrapping the Idee Pixmatch RESTful API in a Ruby Gem

Your Startup's Technology: The First 60 Days in Examples / Class at General Assembly

VirtualBox: Linux on Windows

Mongoid_fulltext: full-text n-gram search for your MongoDB models

Carrierwave: Saving Best Image Geometry

Setting up Cron to run Rake Tasks

A Rake Task for Backing Up a MongoDB Database

A Rake Task for Copying Data between Amazon S3 Buckets

Rails: Passing Arrays in a Query String

A Rake Task for Copying MongoDB Databases

Beer Mug: Contribute Something Small to an Open-Source Project

Carrierwave: Full Control over Changing (S3) Upload Path Name

Continuous Deployment with Heroku-Bartender

Agile Estimating: Don’t Ask How Long it Takes, Sell It!

How to define Enums in Ruby?

Models look nice, but sometimes you just want to change they way they feel

How to become an amazing contributor to an open-source project

Dan North doesn’t believe in magic and makes babies cry

Ruby: Unlearning OOP and Embracing Anarchy

Art.sy: Change the World

Switching Comments of code.dblock.org to Disqus

Folder-Driven Development: when to create a folder?

JNA: Getting currently logged-in user’s groups

Adding (almost) static pages to your fancy Rails website

Technical Lead / Architect Job in NY

JNA: Coming back to Life on Kenai (and a word on Github)

Seeding, exporting and importing MongoDB data with Rake

Rails: opinionated directory structure

DataMapper: promoting columns into classes

Running ruby files on Heroku via rake

BSON::InvalidKeyName: key must not contain '.' or ‘$’

kernel.rb:27:in `should': uninitialized constant RSpec::Expectations::PositiveExpectationHandler (NameError)

Waffle / Сейчас всё станет намного сложнее: troubleshooting Kerberos and NTLM

Intersection of core values in open source and domain driven design

OCLF: One Click Lag Fix on Android 2.2 (Galaxy S)

Open Source, ?, Profit

2011 – The Year of NoSQL Data Breaches?

ProcessDomain: remoting & out-of-process AppDomains

Win32: When things get seriously obscure in Windows XP/2003 UpdateResource

Almost Bricked Samsung Galaxy S Vibrant

dotNetInstaller: UAC Elevation on Install

Waffle: Single Sign-On User Impersonation in Tomcat

The program can’t start because msvcrt-ruby18.dll is missing from your computer.

Breaking the Software Death Cycle with DDD

2010

Agile Hiring: get rid of the open headcount

Strictly Platonic: Engineering Jobs on Craigslist

Help: what are the symptoms, events or actions of a software death cycle?

Corporate Change: Contributing to open source @ OpenSource.com

MSI: This installation is forbidden by system policy.

JNA: Building JNA on Windows 64-bit

Can hiring women in software organizations save you money on plungers?

Waffle: configuring Tomcat’s manager application

TeamSHATTER: Securing Java Applications with Smart Cards and Single-Sign-On

JacobGen: PROCESSOR_ARCHITECTURE vs. PROCESSOR_ARCHITEW6432 in MSBuild

MSBuild: Setting Up a Build Environment w/ NUnit

IBM Cognos BI: generic XSLT normalization for table data

AppSecInc. Community MSI Extensions 1.2 Released

3Licenses: Collect Your 3rd Party Licenses

Corporate Change: Contributing to Open Source

Waffle + JNA under Tomcat 5.5 Security Manager

TeamShatter.com

VMWareTasks 1.5 Released

Waffle w/ Tomcat 5.5, 6 and 7

Svn2: deleting not-versioned files in SVN (at your own risk)

Fs2svn: synchronizing a non-SVN folder to an SVN working copy

@dblockdotorg

Personal Technical Blogging Policy

log4jna: The description for Event ID 4096 from source log4jna cannot be found.

log4jna: log4j:ERROR Could not register event source (Access is denied.)

Does your company have a policy on personal tech blogging and contributing to open-source?

Guava: replacing a ConcurrentHashMap

Stuxnet

JNA: Reading Windows Event Log entries in Java

Log4jna: getting rid of the pesky NTEventLogAppender.dll

VMWare ESXi 4.1.0 Automation: Insufficient permissions in host operating system

Samsung Galaxy Lag Fix: EXT2 FS

RemoteInstall in ThisWeekInTest.tv

Basic Workflow with htmlInstaller: HTML-based bootstrapper for DNI

Supporting MSI Uninstall in dotNetInstaller

dotNetInstaller 1.10 Released

Waffle 1.3 Released

RemoteInstall Test Framework 1.2 Released

Single Sign-On: Spring-Security Negotiate Filter (Kerberos + NTLM) w/Waffle

Iterating over lists in MSBuild

Introducing Oshi: Operating System and Hardware Information (Java)

Code Coverage with EMMA

WAFFLE: A PowerPoint Presentation

Visual Studio 2008 Crashes: doesn’t always mean Microsoft sucks

Учись Работать / Вся правда о том, что нас мотивирует

Tomcat Single Sign-On mixed with Form Authentication w/ Waffle

Single Sign-On: Servlet Negotiate Security Filter (Kerberos + NTLM) w/ Waffle

Windows/Active Directory Authentication: Tomcat + JAAS w/ Waffle

NTLM: Please show ID with every POST

Single Sign-On: Tomcat Negotiate Authenticator (Kerberos + NTLM) w/ Waffle

Spring-LDAP: Naming and Directory Services with OpenDS

MSI Property Patterns: Upgrading, FirstInstall and Maintenance

MSI Community Extensions: deploying databases

FoodCandy.com: Implementing Facebook Connect and Signup w/ Graph API

Java Native Access (JNA) 3.2.5 Shipped

Harvesting wix files

JNDI: Naming and Directory Services with OpenDS

Pure Java Waffle

JNA: Working with Unions

JNA: pointers to arrays of pointers

JNA: AcquireCredentialsHandle, InitializeSecurityContext and AcceptSecurityContext - Establishing an Authenticated Connection

JNA: accessing Windows registry from Java

JNA: Win32 platform API implementation

WAFFLE: Windows Authentication Functional Framework (LE)

JNA: Advapi32, Netapi32 and Secur32

Win32 PInvoke with JNA

Cabinet.dll: what's a proper way to handle fdintCABINET_INFO in a split cab

MSIOpenPackage on Windows 7: behavior changed

Oracle 0-day: how complex systems allow simple attacks

VMWareTasks: collecting Guest OS environment variables

VMWareTasks: reading RunProgramInGuest command output

dotNetInstaller 1.8 Released

Living in Adelaide, GMT+9:30

2009

Locating UI controls and clicking through menus with System.Windows.Automation and White

The tyranny of the plan

Automating Win32 UI Testing: System.Windows.Automation and Project White

Kevlin Henney on hideously dangerous complexity

RemoteInstall: supporting reboots between installers

Implementing AtomPUB in .NET

Bug Driven Design

Designing a System with Reporting in Mind

MSI Extensions Logo

AppSecInc. MSI Extensions Open Sourced

AppSecInc. MSI Experience

CryptProtectData and FIPS 140

RemoteInstall Test Framework Open-Sourced

Vestris Inc. source code published

Mocking UI

Deleting Empty Folders in Outlook

dotNetInstaller Setup Bootstrapper 1.7 Ships

The Duct Tape Programmer by Joel Spolsky

SLMRA: silly little mail reader

Autoconf: world's best multiple configurations software

Vestris Inc. software for free

The Towers of Hanoi: recursive and iterative implementation in Scheme

N queens puzzle: a scheme and x86 assembly solution

Can you believe it? I wrote this code over 10 years ago...

ResourceLib 1.2 with added support for RT_JUSTABOUTEVERYTHING

VMWareTasks 1.3 for VixCOM 1.7.0 (let's reinvent less wheels)

IFYYFME, or how to Maintain a Healthy Level of Communication Across Organizational Boundaries

Why is my Microsoft not working? A tribute to Raymond Chen

MSLU is well alive or how to run on Windows 95/98 without carrying unicows.dll

Upgrading, FreshInstall, Maintenance and other MSI convenience properties

Vulnerability Assessment: User Rights Review

VMWareTasks 1.2: RC1

ACL-based authorization model with NHibernate

dotNetInstaller moving to CodePlex

Svn2svn: migrating from SourceForge to CodePlex

Nesting multiple ConfigurationElement types in a ConfigurationElementCollection

How to do a Debug, Release or both builds with MSBuild

How the .NET Queue will bite your memory usage

Rotating Passwords in Active Directory

File Resource Management .NET Library

VMWare Tasks .NET Library for VixCOM

2008

Abstracting a cumbersome construct in VIX API: GetNumProperties + GetNthProperty

Getting the display name of a VMWare snapshot

Copying files to/from VMWare guest OS is slow: an alternate approach

Announcing the VMWare Tasks Library

HowTo: remote control, copy and run programs on a VMware Workstation or VI server using VIX APIs