PROFESSIONAL SUMMARY:

• Strong and versatile professional, with over 15 years of technical experience.
• Very good with DevOps, Python/Java development, large scale architectures (microservices, lamda), databases, and other aspects of technology.
• Understand how to use the Yum package manager to install new services
• Understand how to create repo files for yum yum to recognize repo
• Understand how to look at IPTABLES, including setting up filters, allowing connections to different ports, etc
• Understand new features in Centos7 such as Systemd and Firewalld
• Good knowledge of general Unix, including using bash to edit files
• Understand how to use awk and sed to extract and parse data from command files. Also understand other tools such as curl, wget, and jq
• Understand how to look a memory, cpu, network information, and syslogs and analyze the data.
• Very strong knowledge of SQL, with a thorough understanding of both DDL and DMLs
• Good understanding of Hadoop's HDFS, including common HDFS commands used to inspect file system.
• Understand the difference between normalized data models in RDMS vs denormalized data modeling
• Model denormalized data to indicate Parent - Child relationships in Elasticearch
• Efficient in Mongo query language as Confidential as ElasticSearch Query DSL
• Very good understanding of Map/Reduce
• Understand how to build out Elasticsearch in a cluster environment, including using data nodes vs. client nodes vs. master nodes.
• Have built out clustered mongodb, which includes Replica Sets.
• Also understand various Hadoop components such as data nodes, named nodes, job trackers, and YARN.
• Great understanding of the structure of programming languages including grammars, vocabularies, and syntax
• Good understanding of Object Oriented programming including encapsulation, inheritance, and polymorphism
• Good understanding of core Java. Including standard SDK, IO libraries, and text manipulation.
• Understand multithreading management, including when to put something inside of a synchronization block using Atomic variables, using Executors, and making applications thread safe
• Understand how to build projects in Maven, including pulling in resources from Maven's repo, building a maven project, and distributing it.
• Understand many design patterns in Java such as Observer Pattern, Builder Pattern, Singleton, etc and their usage
• Familiar with many language features such as Annotations and Generics
• Understand many architectural patterns such as Dependency Injection and Aspect Oriented Programming
• Understand Flask and Django MVC Frameworks
• Good understanding of decorators and how to use them in within a project
• Know how to write code in a more Pythonic way using PEP-8 recommendations
• Good understanding of OO including creating classes, multiple inheritance, and using it with Python's data model
• Understand functional style constructs in Python such as using lambas, the map functions, filters, and reduce
• Familiar with various Python libraries such as simple json, requests, amazon aws boto, and SWF
• Familiar with task management frameworks such as Celery
• Use SOLID principles to guide development
• Understand how to refactor large amounts of code
• Understand best design choices when making code more modular and easy to modify
• Understand test and code coverage so that code is testable within automation framework
• Good understanding functional programming concepts such as maps, filters, reducer, recursion, currying, tail recursion, etc.
• Have built MVC (Model View Controller) applications in multiple languages.
• Understand basics of machine learning including supervised learning (classification, regression( and unsupervised learning (k-means clustering).
• Have used Python scikit-learn and Apache’s SparkML for basic machine learning development.
• Have worked with Machine Learning hackathons.
• Understand how to develop manifest in Puppet, also how to debug and validate changes
• Understand how to write puppet code that conforms to general accepted code style, and use Puppet Lint to enforce this.
• Have worked with project to migrate from Puppet 3 to Puppet 4, and understand the changes. Including the changes to the type system and the changes to iteration
• Understand how to build custom facts via bootstrap facts and facts written in Ruby.
• Know how to write unit test for Puppet in Ruby via rspect
• Know how to use Puppet Enterprise Console and push changes to agents
• Under how to setup and architect a hieradata setup which allows for better separation of code from data
• Understand how to write portable code that will run on various platforms
• Understand various programming techniques in Puppet including: if statements, regex, defined resource types, params, and classes.
• Strong written/verbal skills: 60+ WPM, strong grammatical proficiency, and excellent vocabulary.
• Great logical and analytical thinker. Make great use of inductive and deductive analysis and able to quickly synthesize information, and correlate data.

EXPERIENCE:

DevOps Engineer

Confidential, Philadelphia, PA

Responsibilities:

• My team is automation team which designs and develop automation of various components in our management stack including Bareos, Zenos, Spacewalk, and Elasticsearch (along with Kibana for analytics)
• Work with Amazon AWS EC2 to bootstrap various servers across multiple availability zones.
• Write cloud init script to bootstrap Puppet functionality when servers are being provisioned.
• Continuously rebuild AMIs based on growing business needs
• Wrote cloud provisioning script in Powershell and Bash
• Puppet Code quality standards are enforced to ensure code is portable and repeatable. Code has to run on Windows 2008, Windows 2012, Amazon Linux, Centos 6, Centos7, and Ubuntu.
• Make sure that all code is compliant with strict security standards enforced by US Government. This includes encrypting sensitive data via eyaml.
• Work with various Puppet architectural patterns including Puppet Control pattern.
• Work with other Puppet components like R10k and Hiera to better decouple code.
• Wrote cloud formation templates to stand up new stacks in AWS
• Adopting docker to fit team team roadmap, including figuring out how to use Puppet with docker containers
• Build roles and profiles in Puppet code to deliver to development teams
• Work with ensuring Mongo is up to security standards, including turning on auth, and ensuring that the users have the proper RBAC
• Write Python and Go code to automate the process of creating Puppet projects, including setting up modules vs control repos via Python utilities
• Conduct code reviews to make sure that the correct code is properly checked into repo, and is being correctly pushed to higher environments
• Built Jenkins environment for Puppet code to automate code going through CI pipeline. And also to increase deliverability of Puppet code

Puppet/Ruby developer

Confidential, Philadelphia, PA

Responsibilities:

• Work with team to facilitate the delivery of Puppet repos across enterprise
• Work with Community Facilitation for internal software, which delivery project blueprint for teams using Puppet automation
• Internal tool is written in Ruby and utilize many libraries like Rake, Thor, R10k API, and Puppet bindings
• Participate in code reviews with other teams members
• Look at repo issue tracker and provide and support for people planning on using our services enterprise wide
• Some task include programmatically transforming Puppetfile to .fixtures via Ruby code, debugging issues with Vagrant and our project code, and enforcing Jenkinsfile is in project via Ruby and pre-commit hooks
• Work with Terraform and HEAT to provision new VMs inside of Openstack
• Work with Puppet Engineering teams, and CI/CD teams to further automate release cycles

Sr. Site Reliability Engineer

Confidential, Philadelphia, PA

Responsibilities:

• Project to migrate Python based notification application from NLETS colo to AWS
• Designed cloudformation templates for various environments that is used in application
• Worked with issues in troubleshooting security groups, ELB redirects, and other issues.
• Built definitions for network app would be using including defining VPCs, VPN, Route53 recordsets, ec2 instances, subnets, and routes.
• Used Python boto library to create abstractions which made standing up CF much easier, and also used it to make changesets more configurable.
• Built and maintained custom Gitlab server, including maintain users, created a branch strategy for environments, and set up SDLC for engineers to create merge request
• Built out configurations and values using Saltstack and jinja2. Including managing and templatizing Django and Apache configurations
• Created ELB definitions via Saltstack
• Refactor Nagios code to user Saltstack, including building the proper framework with Saltstack pillars
• Automated scripts to cut VPN certs for users who will be signing into new AWS environment
• Scoped out and defined CI pipeline for our environment. Including setting up Jenkin jobs, creating integrated testing with ServerSpec and Test-Kitchen.

Development Support Engineer

Confidential, Philadelphia, PA

Responsibilities:

• Build support tools for our support team, automate job task, create work flows in preparation to scale with customer volume.
• Write scripts in Python to fix production issues
• Work with development teams for enhancements for things such as logging, performance increases, and better supportability.
• Work with tools like Dynatrace and Splunk to build dashboards and do data analysis on incidents, and other issues.
• Setup code reviews for code written in Python and Java in crucible before it is put as fix into production.
• Develop AWS SWF workflows to automate break fix task using Python and the Boto framework.
• Build out support servers to host tools, including installing Python and Java JVMs, installing Jetty
• Use Flask to build front end tools for other teams to do better self service when triaging issues
• Setup queues in SQS and topics in SNS part of the Amazon AWS toolkit.
• Consume RESTful webservices to create tools part of our main application, which better help with support duties. We use the Python requests library to consume the APIs
• Built RESTFUL APIs using Python Flask Restful extension, so it can be better ported and used by other application teams
• Created front end self-service tools using Flask combined with AngularJS.
• Inject JSON into RESTful webservices to fix request
• Help developers in break fixing issues that are in backlog
• Setup code reviews for myself for other developers to review code in Crucible.
• Built small MongoDB instance to use as a utility database, which serve as a data store for various tools, and other data concerning our application (nodes, version of software, device timeline, etc)
• Scaled out ElasticSearch datastore to be able to search dumped data from Cassandra DB.
• Built search application in Scala Play which allows for searching team's dataset
• Built Cassandra to Elasticsearch ETL process which kept both in sync

Production Support Engineer

Confidential, San Jose, California

Responsibilities:

• Work with enterprise mobile ad publishing platform(iAd)
• Have to understand Hadoop in regards to the ETL process, monitor Oracle batch jobs, look at the conditions on memcached to analyze breakage in process flow.
• Analyze problems, and work with development for solutions, to come up with best practice support methodology
• Created Run-books for offshore team, so that the team could be effectively migrated over.
• Give various technical presentation about the complex application architecture.
• Take business user issues from front end written in GWT, and debug issues. Either through Safari development tool or Firebug.
• Automate several repetitive task via scripts
• Work with development to ensure that they have a supportable model.
• Investigated issues with reporting including understanding breakage in the ETL process
• Analyzed different services used in portal application, without the aid of support tool.
• Built out support tools to ensure that problems were easily identifiable, and to ensure offshore response time was quick.
• Often analyzed logs to induce workflow of events to better understand why the problem was occurring.
• Sat with stakeholders during production issues to have user reproduce problem for my analysis.
• Reverse engineered majority of environment with given tools, to better improve support methodology
• Wrote complex queries in SQL based on application data model, and then automated it through scripts via Python
• Created support and automation tool with Django. This allowed many manual task to be done via web interface
• Set up easier access environment with bash, including setting up .bash profile on local machine and local tunnel

DevOps Engineer

Confidential, Seattle, Washington

Responsibilities:

• Work with legacy SOA app that did trillions of transactions a month
• Wrote SOAP injection scripts in Perl to test out new adapters that were slated for new release
• Participated in writing documentation and instructions for deployments, and trained level 1 teams and admins to execute them
• Troubleshot high impact issues that would impact clients from getting to backend systems, including mitigation steps like redirecting traffic to different nodes
• Helped team build systems that kept track of released in SQL database
• Helped refactor Nagios configurations, and broke monolith files into various configs. Also templated configs inside of CFEngine, and move them into subversion
• Was instrumental and migrating Solaris nodes to x86 nodes with our architecture
• Worked with developers to help find issues with message bus (Tibco EMS)
• Worked with architecture team to break out monolithic JVM into modular JVMs so that application could scale horizontally
• Worked with client and backend teams to help with unboarding them onto our platform
• Due to this being a large scale Java application, it was common to take stack trace, heap dumps, and monitor JVM performance and health.