TECHNICAL SKILLS

Programming Languages: C/C++, Java, JSP, Perl, Python, PHP5, Bourne/Bash/Korn shell scripting, JavaScript

Operating Systems: Linux (Slackware, Debian, RedHat Enterprise, CentOS), BSD UNIX (FreeBSD, OpenBSD), Microsoft Windows Server 2008 R2/2012, Cygwin

Databases: Transact - SQL, MySQL, PostgreSQL, SQLite

Internet Technologies: HTML5, XHTML, CGI, JavaScript, JSON, WebSocket, BSD Socket, WinSock, XML, XSLT, DOM, SAX, XPath, XQuery, XMPP

Development Tools: Autoconf, Automake, CMake, Ant, CVS, Subversion, Git, Buildroot, OpenEmbedded, Vagrant, Jenkins

Server Software: Apache, Nginx, LiteSpeed, Tomcat, PHP-FPM, FastCGI, Varnish, MySQL, MariaDB, PostgreSQL, MS SQL Server, Redis, OpenSSH, OpenVPN, BIND, PowerDNS, Sendmail, Postfix, Dovecot, OpenLDAP, FreeRADIUS, Asterisk, FreeSWITCH

PROFESSIONAL EXPERIENCE

Lead Full Stack Engineer

Confidential, New York, NY

Responsibilities:

• Automate deployment of Node.js applications and services on AWS via OpsWorks/Chef
• Implement continuous deployment pipelines, test automation frameworks, and functional testing suites
• Collaborate in development team activities to ensure consistent level of quality and productivity
• Manage Docker images using EC2 Container Service registry
• Ensure code coverage of RSpec unit tests for Chef recipes
• Maintain and debug the local Node.js NPM repository and the CouchDB application backend

DevOps Engineer

Confidential, New York, NY

Responsibilities:

• Use Ansible playbooks for managing AWS infrastructure
• Automate creation of security groups and virtual private cloud policies for isolation of project environments
• Establish VPC peering and associated subnet routing policies
• Provision Elastic Load Balancers
• Configure auto - scaling groups and metrics for scaling microservices
• Log centralization using Elasticsearch/Logstash/Kibana
• Configure Sensu system/process monitoring framework
• Trigger build and deployment jobs using Jenkins
• Maintain version control system using GitLab
• Provide build/release management support of J2EE application projects 09/2015 - Present

DevOps Engineer

Confidential, New York, NY

Responsibilities:

• Responsible for automating deployments onto AWS infrastructure
• Use Ansible to provision EC2 instances for end-to-end deployment of Ruby and Java services for media data analytics platform
• Use S3 buckets for storage of automated PostgreSQL database backups
• Set up Virtual Private Clouds and Elastic Load Balancers for network encapsulation
• Manage automated continuous integration and continuous deployment using CircleCI

DevOps Engineer

Confidential, New York, NY

Responsibilities:

• Responsible for writing and refactoring Puppet modules
• Set up server profiles and roles for CentOS and Debian Linux systems
• Orchestrate the configuration and deployment of in-house multi-asset trading platform environment
• Separate Puppet data and code using Hiera
• Write unit tests for Puppet manifests using RubySpec
• Author and generate documentation using RubyDoc
• Customize distribution packages according to company-specific standards using RedHat package Spec
• Centralize log shipping of Java applications using Logstash
• Convert CVS and Subversion legacy repositories to make compatible with Git version control system
• Document and install the Gitlab repository manager with user access controls

Systems Engineer

Confidential, New York, NY

Responsibilities:

• Provided infrastructure management support for Bitcoin trading platform
• Provided customer support for RESTful and FIX API access
• Created shell scripts for automating application release deployments onto production environments
• Scripted Ansible playbooks for provisioning RedHat and CentOS cloud servers
• Configured Logstash for parsing and shipping log events of system and network services to Elasticsearch
• Developed reports/dashboards using Elasticsearch data in Kibana
• Tracked daily activity logs from Cisco ASA 5505 firewall
• Revised and audited Apache HTTPD configuration for reverse proxying to Apache Tomcat server
• Maintained system deployment scripts and configurations in source control (Gerrit)
• Configured Monit for process monitoring of services requiring high availability
• Automated issue-tracking with JIRA REST API

System Migration Engineer

Confidential, Salt Lake City, UT

Responsibilities:

• Responsible for migration of Material Resource Planning system onto virtualized VMware environment running SUSE Linux
• Configured Apache HTTP Server with mod wsgi (Python) and mod perl modules for legacy system
• Updated deprecated code written in Perl
• Authored technical documentation of system and database maintenance procedures for training purposes

Software Engineer

Confidential, Framingham, MA

Responsibilities:

• Aided with the cross-architecture porting and optimization of G.729a audio codec, implemented in C, onto ARMv6-based Asterisk PBX system for satellite link-enabled communications system
• Made assembly-level modifications to binaries for ARM architecture
• Customized the ZeroShell Linux distribution and initial RAM disk shell scripts and utilities
• Ported the Slackware package management system onto ZeroShell
• Debugged version mismatch of GNU C Library with system binaries contained in ZeroShell
• Built, packaged and configured Asterisk for ZeroShell
• Responsible for transitioning data accounting services of captive portal system for traffic routed via satellite link
• Merged and modified shell scripts executed from Apache web server CGI

Remote Administrator

Confidential, Edmond, OK

Responsibilities:

• Responsible for the maintenance of server software
• Configured Apache, Nginx, LiteSpeed, MySQL, MariaDB and other server daemons using configuration management
• Revised C/C++ and Python code in server software and modules to harden system
• Integrated Varnish caching system for web acceleration
• Implemented security policies for distributed denial-of-service mitigation for clients
• Load balanced network routes with heavy traffic
• Monitored system resources and usage using Nagios
• Modified Netfilter/iptables rules
• Created and altered Linux VLAN interfaces and routes
• Troubleshoot Tier-3 support tickets

Systems Administrator

Confidential, San Antonio, TX

Responsibilities:

• Responsible for managing and securing CentOS system
• Communicated with sales teams of service providers to establish budget
• Configured Squid proxy server with up to 20 WAN interfaces to handle threaded HTTP connections for data aggregation
• Maintained access control lists

Systems Integration Engineer

Confidential, Chicago, IL

Responsibilities:

• Integrated authentication systems for Linux services using PAM/MySQL
• Customized source builds of RedHat packages for server software and utilities
• Hardened PHP environment with restricted build options and configurations
• Isolated virtual hosts belonging to customers using SuPHP to restrict process ownership and permissions of executed scripts

Migration Engineer

Confidential, Las Vegas, NV

Responsibilities:

• Responsible for disaster recovery of corrupted MySQL databases after hard drive failure
• Attended to the transfer of website database and production code onto new dedicated host
• Corrected code deprecations in Perl to adapt to upgraded system environment
• Signed and managed TLS/SSL certificates for SMTP and HTTPS

Software Developer

Confidential, Colorado Springs, CO

Responsibilities:

• Developed software for TCP communication between embedded devices and control unit over high-latency networks
• Used Ncurses and cURL toolkit wrappers for C# to develop client-side interface with Apache/PHP5/MySQL for server back-end
• Developed AJAX interface using JavaScript/XMLHttpRequest, PHP and XML

Software Port Maintainer

Confidential, Greenville, SC

Responsibilities:

• Maintained and ported software to ARM (Marvell XScale PXA270) architecture for embedded device using OpenEmbedded build framework
• Managed projects via Trac wiki and issue tracking system
• Managed dependencies of system software and libraries
• Ported Java MIDP 2.0 runtime environment

Systems Engineer

Confidential, Virginia Beach, VA

Responsibilities:

• Responsible for designing and implementing MySQL database schema for backend storage of Active Directory (OpenLDAP) user credentials and data
• Developed PHP web interface for Active Directory account management

Package Maintainer

Confidential

Responsibilities:

• Maintenance of upstream software and system libraries for the Slackware Linux distribution
• Coordinate with other developers and maintainers to comply with system standardization
• Revise/patch open source software code written in C/C++
• Automate build process of distribution packages using Bash Source code management using CVS, Subversion and Git Generate Makefiles using Automake and CMake