Oscar A. Jara, Developer in Santa Fe, Santa Fe Province, Argentina
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Oscar A. Jara

Verified Expert  in Engineering

System Administration Developer

Location
Santa Fe, Santa Fe Province, Argentina
Toptal Member Since
April 1, 2013

Oscar is a top information systems engineer who has worked as a developer, system administrator, DevOps engineer, 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.

System AdministrationGitFlowBashLinuxDevOpsPythonCPHPMySQLWindowsNew RelicAmazon Web Services (AWS)AnsibleDockerRackspace Cloud

Portfolio

Spinemedia, LLC
Amazon EKS, Kubernetes, Chef, AWS OpsWorks, WordPress
RabbittApp, LLC
Amazon Web Services (AWS), Bash, Ubuntu, Linux, Apache, MySQL, PHP
MATI, LLC
Node.js, Chef, AWS OpsWorks

Experience

Linux - 12 yearsSystem Administration - 12 yearsDevOps - 7 yearsAmazon Web Services (AWS) - 5 yearsNew Relic - 5 yearsAnsible - 4 yearsJenkins - 4 yearsChef - 2 years

Availability

Part-time

Preferred Environment

Amazon Web Services (AWS), Linux

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.

Work Experience

DevOps

2017 - PRESENT
Spinemedia, LLC
  • Maintained AWS infrastructure (EC2. Aurora, ELB, OpsWorks, IAM, ElastiCache).
  • Implemented WordPress provisioning, deployment, and scaling on AWS OpsWorks/Chef.
  • Implemented a Kubernetes environment based on AWS EKS, including CI/CD pipelines using Jenkins.
Technologies: Amazon EKS, Kubernetes, Chef, AWS OpsWorks, WordPress

DevOps

2015 - PRESENT
RabbittApp, LLC
  • Designed, implemented, and administrated high-availability, auto-scalable, and secure 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: Amazon Web Services (AWS), Bash, Ubuntu, Linux, Apache, MySQL, PHP

DevOps

2018 - 2018
MATI, LLC
  • Implemented Node.js REST API provisioning, deployment, and scaling using AWS OpsWorks Chef.
Technologies: Node.js, Chef, AWS OpsWorks

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: New Relic, Apache, MySQL, Rackspace, CentOS, Ubuntu, Bash, PHP

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: Bash, Java, C

DevOps

2016 - 2016
Arduino, LLC
  • Created an integrated interaction among DataDog (monitoring, visualization), AWS Autoscaling, SaltCloud (orchestration), and Drone (continuous delivery).
Technologies: Amazon Web Services (AWS), Drones, SaltStack, Datadog, Autoscaling

Full-stack Developer

2015 - 2015
Evobits IT
  • Created a template system.
  • Made a security audit on a Bitcoin-related site.
  • Implemented an administrators' internal messaging subsystem.
  • Implemented several security measures in a Bitcoin related site (CSRF, XSS, SQL injection, etc).
  • Developed a DDoS prevention subsystem based on Redis.
Technologies: jQuery, JavaScript, CSS, HTML, MySQL, PHP

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: JavaScript, Perl, Bash, C, Python, PHP

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: Visual Basic, Bash, PHP

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: JavaScript, HTML, PHP, Java

DevOps @ Priceblink.com

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

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

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 (Agent Code)

This is the agent code of a distributed multi-daemon watchdog system based in Python and MySQL. This system would monitor resource availability and behavior (internet links and internet services) and automatically make decisions about the routing of data and services. There should be multiple instances of this agent and one central daemon which performs decision-making.

Multi-daemon Watchdog System

Designed and developed a multi-daemon-based system that monitors resource availability and behavior of internet links and services and automatically makes decisions about the routing of data and services. Multiple instances of an agent daemon exist, as well as one central daemon that performs decision-making.

Multimedia Controller

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.

Languages

Bash, Python, C, PHP, JavaScript, SQL, XML, Perl, Visual Basic, CSS, Java, C++, HTML

Tools

Ansible, Amazon Elastic Container Service (Amazon ECS), Amazon EKS, Chef, Jenkins, AWS OpsWorks, Vagrant, Capistrano, Terraform, Boto 3, Apache, Xdebug, SaltStack

Paradigms

DevOps, Object-oriented Programming (OOP), Procedural Programming

Platforms

Linux, New Relic, Amazon Web Services (AWS), Rackspace Cloud, Windows, Kubernetes, Docker, Arch Linux, WordPress, Ubuntu, CentOS, Rackspace

Storage

MySQL, MongoDB, Datadog, PostgreSQL, Vertica

Other

GitFlow, System Administration, Bluetooth, Ajax, Autoscaling, Drones, Development

Frameworks

Django, Bootstrap, Symfony 2, CodeIgniter

Libraries/APIs

jQuery, Node.js, Puppet.js

2000 - 2006

Engineering Degree in Computer/Information Systems Engineering

Universidad Tecnológica Nacional - Santa Fe, Argentina

AUGUST 2018 - AUGUST 2021

AWS Certified Solutions Architect Associate

AWS