Calin S.

Devops Engineer

Externalisation nearshore
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Mon expérience

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PentalogMars 2017 - Présent

DevOps Engineer working as part of a team of certified Solution Architects and Engineers in the Pentalog Customer DevOps service. Agile and Lean principles is the foundation of our DevOps methodology, which promotes the collaboration between business owners and development, operations, and quality assurance specialists. Altogether as a team, we ensure alignment on the goals and we focus on continuous improvement to achieve them.
  • AWS Cloud automation deployments with Chef / Ansible and CI / CD tools (Jenkins) in Linux environments.
  • Script development for various automation tasks.
  • Installation, configuration and maintenance of Linux / Windows servers and application servers.
  • Managing (creating, maintaining, automating) the build and the deployment process for multiple projects and releases.
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PENTALOG CLIENT : Provider of Data Storage and Management SolutionsAoût 2016 - Août 2019

Full-Stack Developer / DevOps Engineer.
  • Feature implementation in a web application built on a Spring Boot back-end, with an Angular 1.5 front-end.
  • Development of algorithms to improve the multiple entity searching process in a SQL database tree table.
  • Creation of operators for indexing UUIDs in MySQL and PostgreSQL databases.
  • Implementation of a continuous improvement and continuous deployment workflow using a configuration management tool (Ansible).
  • Simulation of data centers using containers (Docker, LXC) for a better application performance visibility.
  • Development of API services using RESTful endpoints for the migration tool, in order to easily manage its commands.
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PENTALOG CLIENT : Software PublisherOctobre 2015 - Septembre 2016

  • Implementation of Ext JS components based on the client's requirements and their integration into a single page application.
  • Helping the team with the best solutions over problems that are not covered by the Ext JS framework or JavaScript engine of each web browser.
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- - FreelanceJanvier 2016 - Août 2016

DevOps Engineer within various projects requiring to keep functional the infrastructure of some web applications.
  • Implementation of high availability and load balancing strategies.
  • Installation and configuration of the host OS on servers (CentOS, Debian, NixOS, FreeBSD).
  • Using virtualization tools (KVM, OpenVZ, Docker, LXC).
  • Provisioning infrastructure with Ansible or SaltStack.
  • Tuning a Linux kernel for a higher performance.
  • Configuration of web servers like Nginx, HAproxy, Hiawatha for multiple purposes (mainly static content servers, reverse proxy, load balancing) and caching using Varnish.
  • Configuration of monitoring tools like Prometheus, Graphana, Nagios or InfluxDB.
  • Configuration of Mikrotik routers, switches and APs.
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SF AppWorksAoût 2013 - Septembre 2015

Full-Stack Developer within a company providing mobile application design and development solutions and services.
  • Development of web applications using Ruby on Rails, MongoDB.
  • Implementation of the communication with multiple APIs of third-party projects.
  • Implementation of the UI components for most of the projects based on provided design mock-ups.
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JillixJuillet 2013 - Août 2013

Developer within a company providing creative web solutions.
  • Development of web applications using Node.js and their in-house framework.
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RubyTribeJuin 2012 - Août 2012

Developer within a company whose activities are focused on providing IT product development solutions and services mainly for start-up companies.
  • Development of an invoicing web application for Cluj Cowork space (Ruby on Rails).
  • Contribution to the development of the Real Estate Money Matrix web application (Ruby on Rails).
  • Writing a web application for ExtraVerde building presentation (HTML, CSS, and a lot of jQuery animations).

Mes compétences

Langues parlées

ROMANIAN: Native speaker
ENGLISH: Beginner

Analysis Methods and Tools


Application Servers

Hiawatha, Nginx, Tomcat, Hiawatha, Apache, Tomcat, Nginx

Software Testing


Web Technologies

Amazon Web Services, Ruby on Rails, Foundation, Modernizr, HTML5, IBM Bluemix Service, Bootstrap, CSS3, Meteor.js, AngularJS, Ember JS, jQuery, Node.js, RESTful API, CodeIgniter

Networks and Systems

UNIX, Salt, Ansible, Docker Swarm, Docker, LXC, Mac OS X, Ubuntu, Slackware, Linux, NixOS, Debian, Windows, Heroku, Puppet, Chef, FreeBSD, GNU, Windows Azure

Open Source solutions



MongoDB, MySQL, PostgreSQL

Environment of Development

GIT, Openshift, Bazaar, Vagrant, Maven


C/C++, JAVA, Ruby, JavaScript, Python, TypeScript


Prometheus, Graphana, Packer, Nexus, Jenkins


Spring Boot

Mes études et formations

Master's Studies in Distributed Systems in Internet, Faculty of Mathematics and Computer Science - "Babes-Bolyai" University, Cluj-Napoca.2018 - 0

Bachelor's Degree in Computer Science, Faculty of Mathematics and Computer Science - "Babes-Bolyai" University, Cluj-Napoca.2015 - 2018

Mes tests

DevOps quiz medium level
Python 3 quiz advanced level
DevOps quiz medium level
Linux quiz advanced level