Top 5%
Stefan N.

DEVOPS ENGINEER

586 dollar
Freelancer
20 ans
Bucharest, ROMANIA
i

Why I'm Top 5%

  • 20 years of industry experience
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Mon expérience

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IncrysNovember 2018 - Présent

Project name: IBM Services for Managed Applications

Project description: IBM Services for Managed Applications is designed
for clients who need a production-ready managed cloud environment to help
improve time to market, reduce capital expenses and enhance operational
efficiencies. The services can help provide clients with access to a more
agile, cost-effective cloud infrastructure to reduce the need for significant
new investments in their IT infrastructures. In addition, faster provisioning
of standardized, virtual resources to help improve operational efficiencies
and time to market can be enabled. Unlike many cloud competitors, IBM
provides a fully managed solution that includes monitoring and management
of operating systems, databases and middle-ware to help reduce operational
risk. This is done through unique service-level agreements at the virtualmachine
level designed to support up-time for your critical applications. The
portfolio offers standard disaster recovery capabilities, and an end-to-end
migration solution that includes planning, migration and deployment into the
IBM Services for Managed Applications environment, helping you achieve a

faster return on your cloud investment with reduced risks and costs.


Roles & responsibilities:

* Automate SAP High Availability solution deployment on SUSE
servers using Pacemaker clusters, DRBD software, Chef software
and Ruby language

* Test/Debug/Fix solution in production environment

* Assist Delivery teams to use the existing automation and gather
feedback about the features they need


Tools/methods used: Chef configuration management software, Git version
control software, Ruby/Bash scripting languages, SLES operating system,
Pacemaker cluster software, DRBD (Distributed Replicated Block Device)
software.
Voir plus

AquaSoftJuly 2015 - November 2018

Project name: IBM CMAS (IBM Cloud Managed Application Services)

Project description: IBM Cloud Managed Services® is a set of services
designed for enterprise applications like SAP and Oracle, delivered on a

security-rich, production-ready cloud environment.

Roles & responsibilities:

* Automate Hana2.0 database life cycle (check prerequisites,
install/update/backup/monitor database software and application
servers) on physical SUSE servers (and virtual machines) using Chef
software and Ruby language

* Automate SAP S4/HANA deployments in stand-alone and High
Availability scenarios (using pacemaker/corosync/sbd software stack,
Chef framework and Ruby language)

* Automate SUSE cluster deployments (using pacemaker/corosync/sbd
software stack, Chef framework and Ruby language)

* Test/Debug/Fix solutions in production environment

* Assist Delivery teams to use the existing automation and gather

feedback about the features they need

Tools/methods used: Chef configuration management software, Git version

control software, Ruby/Bash scripting languages, SLES operating system




Project name: IBM CMS4SAP (IBM Cloud Managed Services for SAP
Applications)


Project description: IBM Cloud for SAP Applications is fully managed
highly secure platform designed specifically for SAP Applications. This
offering is available in 5 continents around the globe and is perfectly suited
for SAP Blueprints/Sandbox, dev/test, training, production (all sizes from
very small to very large) and capacity augmentation.


Roles & responsibilities:

* Create Chef recipes for unattended installation of Oracle database on
Linux operating system

* Create Chef recipes for unattended installation of SAP modules on
top of Oracle/DB2 databases

* Test/Debug/Fix SAP automatic deployment in development and test
environments

* Create/Update configuration files (Oracle/SAP response files)
supporting unattended deployment of SAP/Oracle software

* Troubleshoot SAP automatic deployments in production and preproduction
environments


Tools/methods used: Chef configuration management software, Git version
control software, Ruby/Bash scripting languages




Project name: IBM CMS (IBM Cloud Managed Services)


Project description: IBM Cloud Managed Services is a fully managed,
security-rich and production-ready cloud environment designed to provide
enterprise-class performance and availability.


Roles & responsibilities:

* Create and test VMWare based OS images (Windows
Server/RedHat-based Linux distributions/AIX) for IBM cloud, using
custom scripts, according to customer needs

* Resolve/troubleshoot image related issues

* Discover and implement methods for unattended virtual image
creation and deployment inside virtual centers


Tools/methods used: VMWare vSphere, Rational Team Concert
collaboration tool




Project name: ICOS (IBM Cloud OpenStack Services)


Project description: IBM Cloud OpenStack Services provides a managed
private cloud environment with dedicated bare-metal resources, operating on
the high-performing SoftLayer infrastructure and running on the OpenStack
cloud operating system Juno release.


Roles & responsibilities:

* Create and test OpenStack compliant images (Windows
Server/RedHat-based Linux distributions/Debian-based Linux
distributions) for IBM cloud, using custom unit and functional test,
based on customer issues

* Implement client's requirements related to virtual images and resolve/
troubleshoot relevant issues

* Discover and implement methods for unattended virtual image
creation that would allow a highly degree of automation

* Implement test environment for KVM and VmWare virtual images,
using OpenStack software platform for cloud computing


Tools/methods used: Unattended methods for image creation (kikstart,
preseed, autoYast), Jenkins continuous integration tool, Rational Team
Concert software development team collaboration tool, Kernel-based
Virtual Machines (KVM), OpenStack software platform for cloud computing
Voir plus

Lenovo RomaniaJanuary 2015 - July 2015

Project name: NOS/CNOS (formerly IBM's System X)


Project description: Deliver high-quality multi-layer network switches.

Roles & responsibilities:

* Test Layer2/Multicast protocols and fix software errors

* Implement Layer2/Multicast value added software features

* Develop and implement test cases for network protocols in

Python/Tcl

Tools/methods used: C language, Python/Tcl scripting language,
Debugging using GNU gdb, ClearQuest bug tracking system, ClearCase
software configuration management tool
Voir plus

IBM RomaniaDecember 2012 - December 2014

Project name: NOS/CNOS (IBM System X)


Project description: Deliver high-quality multi-layer network switches.

Roles & responsibilities:

* Test Layer2/Multicast protocols and fix software errors

* Implement Layer2/Multicast value added software features


* Develop and implement test cases for network protocols in Python/Tcl

Tools/methods used: C language, Python/Tcl scripting language,
Debugging using GNU gdb, ClearQuest bug tracking system, ClearCase
software configuration management tool, Bugzilla bug tracking system
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Freescale RomaniaSeptember 2011 - December 2012

Project name: Zigbee

Project description: Design/Implement solutions for Personal Area

Network communications.

Roles & responsibilities:

* 802.15.4 radio sanity check

* Implement MAC layer for 802.15.4 wireless communications and fix
software errors

* Develop/maintain demo applications on top of 802.15.4 MAC layer

* Develop framework for automatic generation of library and source

code released to clients

Tools/methods used: C language, Python scripting language,
XML/XSD/XSLT/Xpath technologies, ClearCase software configuration
management tool, ClearQuest bug tracking system, Accurev software
configuration management application
Voir plus

Institute for Advanced TechnologiesSeptember 2002 - September 2011

Project name: Securing Communications for telephony networks.


Project description: Design, implement and test cryptographic device.

Roles & responsibilities:

* Developed a cryptographic device for protecting data communications
in circuit-switched telephony networks

* Test, maintain and integrate it into existing infrastructure

* Write technical documentation


* Assist clients in troubleshooting communication issues

Tools/methods used: C language, specific assembler languages, symmetric

cryptography




Project name: Solutions for controlling access to software applications.

Project description: Design, implement and test a solution for restricting
access to sensitive software applications.


Roles & responsibilities:

* Developed a software that uses code injection for restricting access to
other applications

* Enhanced existing hardware tokens used for access control and
interconnect them with the new software


Tools/methods used: C language, specific assembler languages, symmetric
cryptography




Project name: Cryptographic evaluations.

Project description: Evaluate security solutions provided to customers.


Roles & responsibilities:

* Evaluate cryptographic strength of internal security solutions against
FIPS 140-2 standard

* Evaluate and secure IT systems using ISO 27000 family of standards

* Test hardware key generators for statistical properties.


Tools/methods used: FIPS 140-2 standard, ISO 27000 family of standards,
custom (proprietary) software

Mes compétences

XML Schema, XML, Windows, VMware vSphere, VMWare, Troubleshooting, Testing, Test Cases, TCL/TK, Software Engineering, Software Development, Software Design, Shell Scripting, SAP, Ruby, Rational ClearQuest, Rational ClearCase, Python, Oracle, OpenStack, Network Security, MySQL, Multicast, Microcontrolers, Linux Red Hat, Linux Kernel, Linux, Layer 2, KVM, GNU, Git, Embedded Systems, Debugging, DB2, Cryptography, Continuous Integration, Clustering, ClearCase, Cisco Switches/Routers, Chef, C, Bugzilla, Bash scripting, ASM, ARM, AccuRev