CV - Stefan Bosak

Name, surname, title: Štefan Bosák, Ing.

Date of birth: 5th Jan 1984
Marital status: married
Childrens: daughter

Krasnohorska 13, 851 07 Bratislava, Slovakia, Europe
Work history
Cloud DevSecOps Senior engineer
Senior SW engineer
consultant, advisor
(04/2024 - current)

Papaya POS s.r.o.
Development and infrastructure for payment terminals and gateways



KVM, Kubernetes, Docker
ElasticSearch
Cybersecurity, PostgreSQL
Kafka, Debian, Alphine
Bash, Python, Grafana
Cloud DevOps Senior engineer
consultant
(01/2024 - 03/2024)


PowereX j. s. a.
AWS cloud and infrastructure in energo field



Ansible, AWS Batch, OpenVPN
GitHub, Docker, ElasticSearch
Terraform, Terragrunt, WSL
Kafka, Debian, Alphine
Bash, Python, Grafana
Cloud DevOps Senior engineer
(10/2022 - 10/2023)



Takeda Pharmaceuticals Slovakia s.r.o.
On-premise and AWS cloud infrastructure in pharma field



Ansible Tower, CloudCustodian
GitHub Enterprise, Docker
Terraform Enterprise, Kubernetes
RHEL, Debian, Ubuntu, Alphine
Bash, Powershell, Python, WSL
Systems engineer III
(02/2022 - 09/2022)



ESET, spol s.r.o.
On-premise and cloud infrastructure in security field
Security, performance scope


BitBucket, NGINX
Docker, Nagios, Zabbix
Prometheus, Grafana
RHEL, Debian, Ubuntu, Alphine
Bash, Powershell, Python, Perl, WSL
DevOps engineer
(11/2021 - 12/2021)



Eleveo a.s.
On-premise and AWS cloud infrastructure in TELCO field



BitBucket, Confluence
Terraform, Terragrunt
Apache Kafka, RabbitMQ
RHEL, RancherOS, Alphine, WSL

Senior R&D SW engineer
(10/2016 - 10/2021)


Kistler Bratislava, s.r.o.
Senior C/C++ developer, system and DevOps engineer
Mentoring, consulting, process workflow optimization

CMake, Jenkins, GitLab
Kernel driver, Apache Thrift
OPCUA, Boost ASIO, Glog, Groovy, Python
Yocto, Debian, Ubuntu, Alphine, WSL
Technical consultant
(06/2015 - 09/2016)


Siemens s.r.o.
Team leader, senior developer
Mentoring, consulting, process workflow optimization
Leader of maintenance team
CMake, OPCUA, PLC
Windows Embedded
TFS, WSL

Senior DevOps L4 engineer
(09/2014 - 04/2015)


SOITRON, s.r.o.
Senior development operations engineer at Hewlett-Packard
Mentoring, consulting, process workflow optimization
Leader for consistency projects (worldwide)
Bash, Powershell
Oracle, MySQL, PostgreSQL
RHEL, Debian, Ubuntu, WSL

Software developer
(01/2012 - 08/2014)



SAP Slovensko s.r.o.
Software developer
SCRUM team member


CMake, J2EE, JPA, Maven
Nexus, Artifactory
Gerrit, Bamboo, Jenkins
ABAP, WSL
DB2, Oracle, MySQL, PostgreSQL
Java developer
(11/2011 - 01/2012)



SAF Simulation, Analysis and Forecasting Slovakia s.r.o.
Java developer
SCRUM team member


CMake, J2EE, Maven
Artifactory, WSL
Bamboo, Jenkins
Hibernate, Spring
DB2, Oracle, MySQL, PostgreSQL
System administrator, consuntant
(09/2011 - 10/2011)

msg life Slovakia s.r.o.
System administration, helpdesk for customers
Consulting, process workflow optimization
Bash, Powershell, WSL
Bamboo, Confluence, JIRA

IT support specialist
consultant
(2010 - 2011)
Digital Systems a.s.
System administration, helpdesk for customers
Consulting, process workflow optimization
Bash, Powershell
Debian, Ubuntu, WSL

Developer, programmer
(2007 - 2010)


Digital Systems a.s.
C/C++ development
J2EE development
Project leader
CMake, J2EE
Jenkins
DB2, Oracle, MySQL, PostgreSQL
Debian, Ubuntu, WSL
IT support specialist
(2005 - 2006)
Ministry of finance of the Slovak republic
System administration, helpdesk for employees
Bash, Powershell, WSL

Languages

written, spoken
C1 (advanced)

written, spoken
A1 (beginner)
Brief list of projects
Senior DevOps engineer
(10/2022 - 10/2023)





Infrastructure consistency
Cross system resource tag consistency
FinOps support
Transformation to Terraform Enterprise



AWS ecosystem
LeanIX, ServiceNow
Cloud Custodian
Bash, Python
GitHub, Kubernetes
Apptio, OKTA, Terraform

Systems engineer III
Senior DevOps engineer
(02/2022 - 09/2022)




Infrastructure monitoring transformation
Migration to Prometheus, Grafana
Creating own exporters, dashboards




Linux/Windows
Ansible, Docker
C/C++/CMake, Python
Bash/PS, NGINX
Bitbucket, JIRA
Prometheus, Grafana, Loki

Senior R&D SW engineer
Senior DevOps engineer
Mentor
(10/2016 - 10/2021)


ComoNeo
Injection molding process monitoring
Development, consulting, support
Optimization
Mentoring

Linux/Windows
VMWare, KVM, Docker, Yocto
C/C++/CMake, Python, Bash/PS
Jenkins/Confluence/JIRA
Git/GitLab

Team leader
Senior developer
Mentor
(06/2015 - 09/2016)


IOWA project
Internal cross-location project
in automotive area
Optimization
Mentoring

Linux/Windows
VMWare, Hyper-V
Bash/PS, TFS
Siemens PLC, panels


Senior DevOps L4 engineer
Senior system engineer
Mentor
(08/2014 - 04/2015)


HP next gen. could
Infrastructure optimizations
Process optimization
Job automation
Mentoring

Solaris, HP-UX, Linux/Windows
VMWare, Hyper-V
Bash/PS, Git/Gerrit
Jenkins/Confluence/JIRA
HP IAAS, HW, NW, SW

Software developer
System administrator
(02/2014 - 08/2014)



SAPUI5/OpenUI5
Internal web-based framework
Process workflow control



Linux/Windows, VMWare
CSS3/HTML5, jQuery/JavaScript
Bash/PS, Git/Gerrit
Jenkins/Confluence/JIRA
Maven, Nexus, Tomcat

Software developer
System administrator
(03/2013 - 08/2014)



SAP HANA
Internal in-memory database
Application Function Library



Linux/Windows, VMWare
Assembler, ABAP, C/C++, SAP NW
Bash/PS, Git/Gerrit
Confluence/JIRA, SQL, Maven
Eclipse, Nexus, Perl, Python

Software developer
System administrator
(11/2011 - 08/2014)



On shelf availability
Predictive data processing/analysis




AIX/Linux/Windows, VMWare
C/C++, JPA/Hibernate
J2EE/JUnits/JMockit
Bash/PS, Subversion, SQL
Bamboo/Sharepoint, Maven, JIRA
Artifactory, JBoss, Spring
Software developer
System administrator
(11/2011 - 06/2014)



Computer generated ordering
Predictive data processing




AIX/Linux/Windows, VMWare
C/C++, JPA/Hibernate
J2EE/JUnits/JMockit
Bash/PS, Subversion, SQL
Bamboo/Sharepoint, Maven, JIRA
Artifactory, JBoss, Spring
Software developer
System administrator
Mentor
(11/2011 - 04/2012)


Migration project
Worldwide migration during acquisition process




AIX/Linux/Windows, VMWare
C/C++, JPA/Hibernate
J2EE/JUnits/JMockit
Bash/PS, Subversion, SQL
Bamboo/Sharepoint, Maven, JIRA
Artifactory, JBoss, Spring
Consultant
System administrator
Mentor
(09/2011 - 10/2011)

Event/resource reservation project
Cross-location event/resource reservation solution



Linux/Windows, VMWare
Bash/PS, MS Exchange
Confluence/JIRA, MS Project


Consultant
System administrator
Mentor
(09/2011 - 10/2011)

Infrastructure project
Optimization of resource management



AIX/Linux/Windows
KVM/VMWare/Xen
Bash/PS, Confluence/JIRA/Trac
Perl, Python

Software developer
System administrator
(2007 - 2011)


CPatrol
Processflow control mail gateway



AIX/Linux/Windows
KVM/VMWare/Xen
Bash/PS, Confluence/JIRA/Trac
Perl, Python

Software developer
System administrator
(2008 - 2011)


Anti money laundering
Banking area solution



Linux/Windows, VMWare/Xen
J2EE, Hibernate, Spring
Bash/PS, Trac, Maven
Eclipse, Apache/JBoss/Tomcat

Software developer
System administrator
Consultant, leader
(2008 - 2011)

Rating
Banking area solution for data processing



Linux/Windows, VMWare/Xen
J2EE, Hibernate, Spring
Bash/PS, Trac
Apache/JBoss/Tomcat

Software developer
System administrator
(2007 - 2009)


Information system for municipalities
Specific information and data processing system



Linux/Windows, VMWare/Xen
J2EE, Hibernate, Spring
Bash/PS, Trac
Maven, Apache/JBoss

Founder/driver
Ecosystem architect
(2000 - current)



Own virtualization infrastructure
Self-optimized multiprovider virtual ecosystem




BSD/Linux/Windows, KVM, Bind9
C/C++, Bash/PS,
VyOS, Bird, CISCO, OpenVPN
AWS, Azure, Digital Ocean, Linode
Vultr, UpCloud, Kamatera

Education
University - Master degree
(2009 - 2011)


Faculty of electrical engineering and information technology
Slovak university of technology
Institute of control and industrial informatics
Programme: Robotics
Diploma thesis:
Optimization of mobile robot
control system

University - Bachelor degree
(2002 - 2009)


Faculty of electrical engineering and information technology
Slovak university of technology
Institute of control and industrial informatics
Programme: Automation
Bachelor thesis:
Control of workflow process based
on Petri Nets

Secondary school
(1998 - 2002)

Secondary school of electrical engineering
Programme: Electrical engineering

Final thesis:
Regulated power supply
with a logic probe
Skills - electrical engineering
Designing printed circuit boards

intermediate
Skills - automation
Programmable logic controllers

basics
Skills - robotics
Design, implementation,
optimization of control systems
School projects

basics

Computer skills - user
Operating systems


(desktop, server)


expert
expert
intermediate
Office

intermediate
Browsing

intermediate
Emailing

intermediate
Project managment

intermediate
Diagrams

intermediate
Graphics

basics
CAD/CAE

basics
Language of technical computing



intermediate
basics
Computer skills - administrator
Operating systems


(desktop, server)


expert
expert
intermediate
Computer skills - programmer
ABAP

ABAP
intermediate
Assembler

Atmel
PC
intermediate
intermediate
C/C++


gcc/g++
CMake
Microsoft Visual Studio (C++)
intermediate
intermediate
intermediate
C#

Monodevelop
Microsoft Visual Studio (C#)
basics
intermediate
Java




Eclipse (J2EE) (AWT, JFC/Swing)
Eclipse (J2EE) (Hibernate, JPA)
Jasper Reports
intermediate
intermediate
intermediate
intermediate
UML
ArgoUML
basics
Web
CSS
HTML5
jQuery
JavaScript
SAPUI5
intermediate
intermediate
intermediate
intermediate
intermediate
Scripting
BASH, GNUAwk, grep, sed
intermediate
Computer skills - databases
SQL



SAP HANA
Oracle, IBM DB2
intermediate
intermediate
basics
HQL
Hibernate
intermediate
Computer skills - development lifecycle
Version control systems

intermediate
Continuous delivery pipeline

intermediate
Artifact repository management

intermediate
Computer skills - tracking systems
Bug/issue
, Bugzilla, Trac
intermediate
Computer skills - storage
General
HW & SW RAID, SAN, LUN
intermediate
Device knowledge

Hewlett-Packard storage system (MSA)
IBM storage system (DS)
basics
basics
File share
CIFS/NFS/Samba (BSD,Linux,Windows)
intermediate
Backups
Bacula
basics
Computer skills - networks
General
Design, implementation, optimalization of networks
intermediate
Device knowledge

CISCO switches, routers, ASA boxes
JUNIPER VPN boxes
basics
basics
Failover, loadbalancer

Linux routing & traffic control utilities (iproute2)

intermediate
intermediate
VPN

intermediate
BGP

intermediate
Monitoring systems


Cacti, MRTG, SysAid
intermediate
basics
Computer skills - security
Firewalling

BSD (pf, ipf)
Linux (iptables)
basics
intermediate
Computer skills - virtualization
Open-source
LinuxKVM, VServer, Xen
intermediate
Free

intermediate
Commercial
VMWare ESXi, Microsoft Hyper-V
intermediate
Infrastructure management

intermediate
Ecosystems/platforms

intermediate
Infrastructure orchestration

intermediate
Computer skills - Artificial intelligence/Machine learning tools
Conversation

intermediate
Code autocomplete

intermediate
Certifications, licencies
Electrotechnical
Certificate for competence to work in electrotechnical

Networking
Cisco Certified Network Associate Routing & Switching

Car
Driving licence

Interests, hobbies
Technical
Non-technical
HW/SW development, engineering, architecture
optimization, consulting, mentoring


Sports
Cycling, tourism, skiing, swimming

Others
Work in the garden and around the house, family