J. PABLO FERNÁNDEZ

PROFILE I’m a polyglot with experience in more than 17 programming languages and many platforms, frameworks including but not limited to Ruby, Ruby on Rails, Python, Django, Clojure, ClojureScript, React, Erlang, etc. I have more than 18 years of professional experience programming and I've been coding since I was 7 years old, creating and contributing to various source projects. I have more than 5 years leading small teams, in the role of CTO/CEO of small startups.

Updated version: https://pupeno.com/cv GitHub: https://github.com/pupeno GitHub Awards: http://github-awards.com/users/search?login=pupeno LinkedIn: https://www.linkedin.com/in/pupeno Stack Overflow: http://stackoverflow.com/users/6068/pablo RubyGems: https://rubygems.org/profiles/pupeno Clojars: https://clojars.org/users/pupeno

EXPERIENCE

FLEXPOINT TECH FOUNDER 2016-09 → PRESENT • Consulting for Credit Suisse building a Clojure and ClojureScript application for risk management in EMEA and US.

QREDO CTO 2016-04 → 2016-08 • Presented the business to 150 people at the Techhub demo only after three days of joining. • Launched the product within two months of joining, hosted in AWS EC2 instances with RDS and S3. • Trimmed the company to the most valuable employees and contractors, reducing cost and extending runway. • Established processes and policies for handling tasks, documentation, leads, documents, etc. • Improved culture and morale across the board. • Developed the web front end for customers to sign up, pay and manage their account in Ruby on Rails.

CAROUSEL APPS CO-FOUNDER, CTO, CEO, DIRECTOR 2011-11 → 2016-03 • Co-founded Carousel Apps as its CTO and took the CEO position later on. • Managed up to 4 people, including hiring and training: 2 developers and 2 support/marketing people. • Set up processes for smooth operations of every aspect of the company, from handling support to handling bank accounts. • Doubled revenue while acting as CEO serving hundreds of customers and hundreds of thousands of users. • Product market validation (Lean Startup style) for various new products including Screensaver Ninja. • Research of Single Page Application development for future projects; evaluating EmberJS, Clojure and ClojureScript developing: • Prerenderer: a library to pre-render single page applications on the server for performance and indexing. • Free-form: a super flexible library for generating forms in single page applications. • jar-copier: essential tool to properly integrate New Relic in Clojure applications. • conman: a database connection manager designed for Luminus and YeSQL. • to-jdbc-uri: library for simplifying database connection, specially on Heroku. • Screensaver Ninja: • Lay the foundation and design of the product, acting as product manager. • Started the codebase for both Mac OS X and Windows, for the initial proof of concept prototypes. • Figured out how to have a separate cookie jar using Apple’s WebKit, something that Apple engineers deemed impossible. • Watu, our first product, a multi-tenant application for temporary staffing companies: • Developed it from scratch with Rails, Ruby on Rails, PostgreSQL, Solr. A total of 43k lines of code. • Took care of DevOps with scalable web servers on virtual machines with rapid provisioning with Puppet, a GlusterFS powered redundant distributed file system hosting 12.8 million files (mostly images) and a custom Solr/ElasticSearch setup for search. • Developed custom solutions as none supported our needs. • Served more than 100 customers with 1000s of managers for hundreds of thousands of staff members.

HEAR A BLOG CO-FOUNDER, CEO 2010-04 → 2011-01 • Came up with the idea, co-founded it as a part-time side-project startup. • Wrote half the codebase; in # with ASP.NET MVC. • Startup selected as finalist for Seedcamp Paris. • Reached millions of users by narrating: Mark Suster's Both Side of the Table, Peldi's Balsamiq's blog, Jason Cohen's A Smart Bear, Patrick McKenzie's MicroISV on a Shoestring and the biggest one, The Daily WTF. • All of this on a $2000 budget (total).

Location London, United Kingdom email [email protected] web https://pupeno.com Page 1 SIMPLIFICATOR DEVELOPER 2010-03 → 2011-09 • Developed complex application for data acquisition for environment metrics in Rails 3. • Merged several Rails web applications into a single parametrizable one. Currently serving tutor24.ch, homeservice24.ch, etc. • Started maintaining, improving and documenting the SimpleBillboard paying system (Rails 2.3). • Migrated Berufsbildner’s internal tool from Rails 1.2 to Rails 2.3 and started maintaining it. • Developed part of the subscription system for the version of Evita.ch. • Tracked and fixed many nasty memory leaks for http://compass.prohelvetia.ch, a project I never worked on before. • Hackdays: Rails app to organize fussball matches, contributions to the Clojure app Clojars. • Internal tech talk: Why I love Smalltalk and Lisp

G O O G L E SOFTWARE ENGINEER IN TEST 2007-05 → 2010-01 • Gmail testing: • JavaScript mock of the Gmail server to test the UI independently. • Machine learning evaluation tool for Gmail Priority Inbox. • Re-wrote the development-mode Gmail starting program, from a 2000-long script into a properly modular Python application. Gmail is a collection of tens of servers of which some are essential and some are optional and different developers run different sets • Continuous integration setup. • Developed of end-to-end and integration tests for various internal secret applications. Among other things: • Predicted dangerous bug which three months latter stopped the development of 53 projects. • Increased the realism of a set of tests unveiling at least 3 potentially data-loss bugs. • Created web application to keep track of quality metrics of other products. • Set up various continuous integration monitoring dashboards. • Tech talks: “Python testing tools”, “Coding in Erlang”, “Introduction to Testing”, “Esperanto”.

RELIABLE SERVICES SOFTWARE DEVELOPER 2005-08 → 2007-04 • Developed Asterisk module to manage users and tasks. Working without a flaw since day 1 due to heavy testing. • Developed gateway between an XML protocol and Asterisk's Manager Interface. • Maintained around 10 complex Asterisk deployments with more than 300 phone terminals. • Stress and performance testing of Asterisk IVRs installations. SIPp. • Added real-time support for agents in Asterisk (5143). • Packaged Asterisk and related tools and libraries for GNU/ for our own servers, speeding up deployments. • Wrote extensive documentation of procedures, installation, maintenance, administration, etc. • Performed general system and network Administration.

FREELANCING SOFTWARE DEVELOPER 2005-02 → 2005-08 • Hosting Map, web application for searching hosting plans. • Random Text, web component to show random texts from a database. • Getter, web application to automatically download, parse and archival of files. • Sentences, random periodic delivery of sentences from database to a text file. • Redirector, web component for managing automatic redirection. • PicoURL, generate shorter URLs that redirect with accounting. • Sustainability/viability study of free instant messaging solutions.

IFPEOPLE SOFTWARE DEVELOPER 2004-09 → 2005-01 • Design, set up and deployment of a Plone web site with more than 40 editors requiring custom products. • Developed Plone products for: • Displaying documents stored in other locations (like a symlink) • Speeding up the addition of keywords to documents. • Embedding external web sites in a Plone web site. • Handling quotes including a portlet for displaying. • Helped with deployment of other Plone sites.

ANDI SOFTWARE DEVELOPER 2003-03 → 2003-11 • Developed of a video editor for set top box using C++, /KDE, transcode, mplayer and Xine.

FREELANCING SOFTWARE DEVELOPER 2002-03 → 2003-03 • Developed web sites for a painter, a marble and granite shop and an elitist party organizer in PHP and MySQL. The first one run for more than 10 years without an issue.

TECSIS INTERN SOFTWARE DEVELOPER & SYSADMIN 1999-06 → 2002-03 • Deployed various GNU/Linux and OpenBSD servers. • Developed GUI file usage monitoring application, called KSamStat, for Samba to be able to replace a Novell Netware server. • Developed a web app to administrate a library of CD-ROMs including a big medical collection with the goal of also handling magazines, books, web sites and other educational material.

ITPA S.A. INTERN SOFTWARE DEVELOPER & SYSADMIN 1998-03 → 1999-06 • Installed a Linux firewall using ipchains. • Developed web administration tool for it in C using CGI in Apache (yes, a web app in C, crazy days!).

Loc London, United Kingdom email [email protected] web https://pupeno.com Page 2 PROJECTS, OPEN SOURCE LIBRARIES AND CONTRIBUTIONS • Free Form: a library to generate forms for ClojureScript. • Prerenderer: a library to pre-render ClojureScript Single Page Applications on the server. • assert_difference: a gem that improves Rails’ assert_difference method in various ways. 44854 downloads. • validation_auditor: a gem to track when validations are not passed in a Rails project. 5668 downloads. • random_unique_id: a gem for generating small random ids for records in Rails. 5662 downloads. • action_texter: a gem to send SMS messages with pluggable backends, with Twilio and Nexmo implementations. 8482 downloads. • ubiquitous_user: a gem to generate users on the fly in a Rails project without requiring log in. 16196 downloads. • rails_openid: a gem to help authenticate OpenID users in Rails. 4094 downloads. • image_button_to: a gem that adds image_button_to and to_function to Rails. Also submitted as a patch for Ruby on Rails itself. 3091 downloads. • Keep on Posting: checks your blog or twitter feeds and let’s you know when your not posting as often as before. • DNSk9: constantly checks your DNS configuration and informs you by email when something breaks. • Sano: health tracker developed over a weekend as an experiment on productivity in Ruby on Rails, blogging as I did it. • Dice: dice simulator for Android leading a team of two. • Fanterlastic Four: Example of how to use Serlvers to write some extremely basic IP servers. • Serlvers: Erlang module to write IP (TCP/IP) servers. • SCons Erlang: Extension for SCons to be able to build Erlang projects. • File Activity Viewer: Monitors files and shows the new lines almost real-time (visual tail -f). • Score Reading Trainer: Improve reading speed of musical scores, written several times it C++, C# and Java. • KTTSD: A KDE DCOP plug in based Text To Speech service. • Rails: found and fixed a bug when dropping indexes (4809) • Python: small patch to Python for skipping tests (1034053). • Django: converted Django itself to work with email addresses instead of usernames and maintained it for a while (never published). Added some patches for removing “import *” (14675). • Asterisk: real-time support for agents in Asterisk (5143).

PRESENTATIONS • “What is a Macro”, 2015-12-03, Clojure Exchange, London, UK. • “What Ruby can’t do”, 2012-07-09, LRUG Monthly meeting, London, UK. • “Programming Languages and what they can teach us”, 2006-11-11, CaFeLUG’s CaFeConf 2006. • “Lisp, a different Language”, 2005-11-20, 5º Jornadas Regionales de Software Libre. • “Lisp, a different Language”, 2005-10-13, CaFeLUG’s CaFeConf 2005. • “Multi-platform toolkits for graphical interfaces”, 2005-06-06, Usuaria’s Second National Congress of . • “Architecture of KDE, building an integrated desktop”, 2004-07-15, II Linux Gathering of Litoral, Entre Rios National University. • “Programming Qt/KDE, the 1, 2, 3 of GUI programming”, 2004-07-15, II Linux Gathering of Litoral, Entre Rios National University. • “Develop faster using KDevelop”, 2004-05-28, Usuaria’s First National Congress of Free Software. • “KDE”, 2004-05-22, CaFeLUG’s First Demo Day. • “Rapid Application Development with Qt/KDE and KDevelop”, 2004-03-20, CaFeLUG’s Charla Técnica Trimestral.

PUBLICATIONS • “Programming in Python part 1” and “… part 2”, Linux Journal, issue 158 and 159, June and July 2007. • “An XML Approach to Templating with PHPTAL”, and “… continuation” |architect, volume IV, issue 3 and 4 on 2005. • “KIO: Input and Output with KDE”, Mundo Linux, issue 71, October 2004. • “DCOP: Interprocess Communication”, Mundo Linux, issue 70, September 2004.

BUZZWORDS • Programming concepts: Functional, object oriented, multiple dispatch, testing, meta-programming. • Programming Languages: Ruby, Clojure, Python, Objective-C, Swift, C, C++, Java, JavaScript, Lisp, Erlang, Haskell, Smalltalk, C#. • Libraries and frameworks: Rails, Django, Android, Cocoa, CocoaTouch, Qt, KDE, Gtk+, Gnome, , libFFI, PyGtk, Twisted, GNUstep. • XML: DTDs, HTML 5, CSS 3, XHTML with CSS, DOM, DocBook, TAL. • Databases: SQL, MySQL, SQLite, PostgreSQL, OpenLDAP. • DevOps: Linux (Debian, (K)Ubuntu, Gentoo), Puppet, Linode, AWS, OpenBSD, FreeBSD, Mac OS X • Version control: Git, Mercurial, Darcs, Subversion, Perforce, CVS.

EDUCATION • 1989 → end-of-time Self-learning of computer science by books, papers, magazines, videos, etc. • 2004 → 2007 Attended some university courses as a visitor, because they were fun. • 1996 → 2001 Electronics & Electromechanics, Technology Institute Philips Argentina.

LANGUAGES • English: Read, written and conversational. • Spanish: Native. • Esperanto: Basic.

Loc London, United Kingdom email [email protected] web https://pupeno.com Page 3