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Oscar A. Jara

Oscar A. Jara

Santa Fe, Santa Fe Province, Argentina
Member since February 12, 2013
Oscar is a top information systems engineer who has worked as a developer, system administrator, and university professor. He has extensive experience with low-level software development and has worked with client-server, distributed, and fault-tolerant web architectures. He has been working as a DevOps engineer in recent years.
Oscar is now available for hire
Portfolio
Experience
  • Linux, 12 years
  • System Administration, 12 years
  • DevOps, 7 years
  • New Relic, 5 years
  • Amazon Web Services (AWS), 4 years
  • Ansible, 2 years
  • Jenkins, 2 years
  • Chef, 1 year
Santa Fe, Santa Fe Province, Argentina
Availability
Part-time
Preferred Environment
Linux, AWS
The most amazing...
...thing I've coded is a libVLC-based app to control via Bluetooth two video outputs, one audio output, and a lightboard, concurrently.
Employment
  • DevOps
    2017 - PRESENT
    Spinemedia, LLC
    • Maintained AWS infrastructure (EC2. Aurora, ELB, Opsworks, IAM, ElastiCache).
    • Implemented WordPress provisioning, deployment, and scaling on AWS Opsworks/Chef.
    Technologies: WordPress, Opsworks, Chef
  • DevOps
    2015 - PRESENT
    RabbittApp, LLC
    • Designed, implemented, and administrated high-availability, auto-scalable, and secured AWS infrastructure.
    • Implemented secured VPC with VPN access.
    • Implemented load-balanced public (web) and private (app) layers.
    • Implemented auto-scaling groups to support demand variation.
    • Implemented multi-availability zone master/slave MySQL RDS.
    • Improved performance on SQL queries.
    Technologies: AWS, PHP, MySQL, Apache, Linux, Ubuntu, Bash
  • DevOps
    2018 - 2018
    MATI, LLC
    • Implemented Node.js REST API provisioning, deployment and scaling using AWS Opsworks Chef.
    Technologies: Opsworks, Chef, Node.js
  • DevOps
    2014 - 2017
    PriceBlink
    • Handled daily Rackspace cloud sysadmin issues (e.g.,, web server and database migration and replication).
    • Supported to improve application efficiency and response time.
    • Handled MySQL DBA operations.
    Technologies: PHP, Bash, Ubuntu, Centos, Rackspace, MySQL, Apache, NewRelic
  • Advanced Operating Systems Professor
    2009 - 2017
    Universidad Tecnológica Nacional
    • Performed real-time and kernel-level Linux programming.
    • Developed client-server applications based on sockets and RPC technologies.
    • Taught and programmed device drivers.
    Technologies: C, Java, Bash
  • DevOps
    2016 - 2016
    Arduino, LLC
    • Created an integrated interaction among DataDog (monitoring, visualization), AWS Autoscaling, SaltCloud (orchestration), and Drone (continuous delivery).
    Technologies: AWS, Autoscaling, DataDog, SaltStack, Drone
  • Full-stack Developer
    2015 - 2015
    Evobits IT
    • Created a template system.
    • Made a security audit on BitCoin related site.
    • Implemented an administrators internal messages subsystem.
    • Implemented several security measures in BitCoin related site (CSRF, XSS, SQL Injection, etc).
    • Developed a DDoS prevention subsystem based on Redis.
    Technologies: PHP, MySQL, HTML, CSS, JS, jQuery
  • Developer, System Administrator
    2010 - 2014
    Universidad Tecnológica Nacional
    • Supported an email management system using PHP and Perl with a MySQL back-end.
    • Created a distributed, multi-daemon watchdog system with Python and MySQL, which monitored resource availability and behavior (internet links and internet services), and automatically handled the routing of data and services.
    • Led migration to a fault tolerant LDAP-based architecture to support all university applications.
    • Provided security consultations for new web PHP, HTML, and JavaScript web applications.
    • Developed several system administration scripting applications in Bash, PHP, Perl, and Python.
    Technologies: PHP, Python, C, Bash, Perl, JavaScript
  • Software Architect, Developer
    2011 - 2012
    DINT S.A.
    • Designed and developed an application for a Linux-based device which was controlled via Bluetooth from an Android device (tablet or smartphone) and controlled two video outputs (LED TV and a projector), one audio output, and a lightboard controlled from the device serial port or a different Bluetooth port.
    Technologies: C
  • System Administrator, Developer
    2006 - 2010
    CONICET - Centro Científico/Tecnológico Litoral Centro
    • Wrote many PHP and Bash scripts for custom system administration.
    • Developed an application to control a mass spectrometer and generate graphic representations of the results.
    • Designed and developed an inventory system for the organization of assets.
    Technologies: PHP, Bash, Visual Basic
  • Software Architect, Developer
    2004 - 2005
    Omega S.A.
    • Designed and developed a web-based system to assist with the running of a betting game in a Venezuelan casino in Venezuela, which generated the necessary random entities, calculated the bet awards, and graphed the results of the game.
    • Designed an application protocol for electronic money transfer and accounting.
    • Designed and implemented the server architecture to support several application deployments.
    Technologies: Java, PHP, HTML, JavaScript
Experience
  • DevOps @ Priceblink.com (Development)
    http://www.priceblink.com

    Cloud infrastructure management based on Rackspace services (Provisioning, Load Balancing, Database replication). Application monitoring and deployment (Ruby, PHP, Git, Capistrano, New Relic).

  • Developer @ EvoBits Information Technology SRL (Development)

    Developed across the full stack:
    * run security audit.
    * implemented security measures.
    * developed template subsystem.
    * developed internal messaging subsystem.
    * developed DDoS mitigation system based on Redis.

  • DevOps @ RabbittApp.com (Development)
    http://www.rabbittapp.com/

    Designed, implemented, and administrated a high-availability AWS infrastructure.

    Includes:
    * VPC with VPN access.
    * Load Balanced Public Web Layer.
    * Load Balanced Private App Layer.
    * Autoscaling Layers.
    * Multi Availability Zones all Layers.
    * Master Slave Multi AZ RDS.
    * SES service for mail sending.

  • Multi-daemon Watchdog System (Development)

    Designed and developed a multi-daemon based system that monitors resource availability and behavior (internet links and internet services) and automatically make decisions about the routing of data and services. There are multiple instances of an agent daemon and one central daemon which performs decision-making.

  • Multimedia Controller (Development)

    Designed and developed an application to run on a GNU Linux-based device, controlled via Bluetooth protocol with an Android tablet or smartphone. The app controls two video outputs, one audio output and a serial connected lightboard, all concurrently and independently. The app is coded in C and heavily built on top of libVLC library.

Skills
  • Languages
    Python, Bash, PHP, C, XML, SQL, JavaScript, Java, HTML, C++
  • Tools
    Git flow, Vagrant, Chef, Jenkins, AWS OpsWorks, Capistrano, Ansible, Xdebug, SaltStack
  • Paradigms
    DevOps, Procedural programming, Object-oriented Programming (OOP)
  • Platforms
    Linux, New Relic, Amazon Web Services (AWS), Windows, Rackspace Cloud, WordPress, Docker
  • Storage
    MySQL, MongoDB, Vertica, PostgreSQL
  • Other
    System Administration, AJAX
  • Frameworks
    Bootstrap, Django, Symfony 2, CodeIgniter
  • Libraries/APIs
    jQuery, Puppet.js
Education
  • Engineering degree in Computer/Information Systems Engineering
    2000 - 2006
    Universidad Tecnológica Nacional - Santa Fe, Argentina
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