Viktor

VIKTOR KALASHNYKOV
SENIOR SOFTWARE DEVELOPER
Email: [open contact info](look above in the "contact info" section), Phone: [open contact info](look above in the "contact info" section)
LinkedIn profile: [open contact info](look above in the "contact info" section)
TECHNICAL SKILLS:
Programming languages: Java, Groovy, JavaScript, Perl, PHP, C++,
VB.NET, SQL, PL/SQL, T-SQL
Frameworks working experience: JavaEE, Struts2, Grails, Spring Boot,
JHipster, Yii2, Apache Tiles, Vue.js, Ext.JS, SmartClient, Hibernate,
EclipseLink
Shell: Powershell, Bash
Database experience (including administration): Oracle Database, SAP
HANA, SAP ASE, SAP MaxDB, PostgreSQL, MySQL, IBM DB2, MS SQL
Server, MySQL, H2, Google Firebase
Cloud Solutions: Azure, AWS, Google Firebase, Informatica Cloud
SAP Solutions: S/4HANA, NetWeaver, Content Server, BusinessObjects BI
Platform, Solution Manager, Landscape Management, SAP Data Services
Protocols: REST, SOAP, HTTP, XML-RPC, Burlap, Hessian, AMQP, XMPP,
MQTT
Build Tools: Apache Maven, Gradle
Integration Technologies: Apache Camel
Scheduling systems: Quartz
Virtualization technologies: VMWare ESX, KVM, Vagrant
Big Data: Hadoop, Apache Ignite
Orchestration Platforms: Apache Airflow, Automic Engine
ETL: Informatica Cloud, SAP Data Services, Talend, dbt, Azure DataBricks
Software Skills Container Technologies: Docker, Kubernetes
Schemas: XML, JSON
Infrastructure-as-a-Code: Terraform
Storage systems: NetApp, AWS S3
Messaging systems: RabbitMQ, Telegram, WhatsApp
Social: Youtube, Twitter, Facebook, Instagram, Tumblr, Reddit
ITSM: ServiceNow, JIRA
RPA: UIPath, BluePrism, Robot Framework
NoSQL: MongoDB
BI: Power BI
Testing tools: Apache JMeter, Katalon Studio, Selenium, Junit
CI/CD: Gitlab CI
Static Analysis: SonarQube, JFrog Xray
Monitoring Tools: JavaMelody, Prometheus, Grafana, Data Dog,
Micrometer, JMX
Central Package Management: Nexus Server
IDE: Intellij IDEA, Visual Studio Code, NetBeans, Eclipse, Visual Studio, QT
Creator, Android Studio
Project tools: JIRA, Confluence, GitLab
Version Control Systems: Git, SVN, CVS
Documentation tools: Confluence, LaTeX
Methodologies: Scrum, Kanban, Waterfall
 Web Servers: Apache Tomcat, Apache HTTP Server, Oracle WebLogic
Areas of working experience: Web Development; SAP systems
administration, extension and maintenance; Android Development; Test
Automation; Orchestration Platforms
Server technologies: Fujitsu PRIMERGY
Networking technologies: Cisco switches
Business Areas: Retail, Restaurant Business, Insurance, Banking,
Governmental sector
Operating Systems Windows, Linux (SUSE, Ubuntu, RHEL and Fedora distributions), Android

SOFT SKILLS:
Scrum planning
Team Leading experience
Onboarding and younger teammates motivation skills

CERTIFICATIONS:
SAP HANATEC 17
SUSE Rancher SCA
Cisco CCNA

EDUCATION
01-2017 - 09-2019 Lodz University of Technology, Lodz, Poland
Master degree, Information Technology, Intelligent Databases
Modules include: AI system development, Android development, Database administration (DB2, SAS,
SQL Server), programming language compilation technics, Distributed systems programming,
Virtualization technologies and Big Data tools
Master diploma project: Android Application for touristic carriers. Solution is developed using Java,
Google Firebase, Android Framework and Android Studio
09.2010 - 06.2014 Donetsk National University of Technology
Bachelor degree, Economical Cybernetics
Modules include: Database Technologies, Object Oriented Programming, Expert Systems implementation,
Microeconomics, Macroeconomics, Investment, Statistics, Finances of Entrepreneurship, Expert Systems,
Game Theory

LANGUAGES
Polish: Fluent (C2)
English: Fluent (C2)
Ukrainian: Native

TRAININGS

03.2022 – 05.2022 SUSE Rancher course – certified as RAN SCA specialist. Modules include:
Introduction to Kubernetes; Provisioning and Administration of Kubernetes Clusters using SUSE
Rancher.
05.2021 - 01.2022 SAP HANATEC course – certified as HANATEC_17 specialist. Modules include:
Installation and Administration of SAP HANA, High Availability and Disaster Recovery Methodologies,
Configuration and Operations, Security Concepts of SAP HANA, Tuning of SAP HANA, Data
Partitioning and Optimization, SAP HANA XS Advanced and Classic configuration and security,
Monitoring and Management Tools for SAP HANA
02.2021 - 12.2021 Cisco CCNA course. Modules include:
Networking fundamentals, OSI Model specification, Configuration of Cisco Switches, Routing,
Switching and Wireless Essentials, Enterprise Networking, Automation and Security, TCP/IP stack,
Network High Availability, Spanning Tree Protocols, OSPF and EIGRP protocols, VRRP protocols,
virtualization in networks, Physical layer of networks, NAT.

PROFESSIONAL EXPERIENCE
08-2023 – Present
Luxoft Poland
Senior Java Software Developer
Project: European System for validation and monitoring of circulation of Euro Banknotes between
National Central Banks of European countries
Customer: European Central Bank
Responsibilities:
• Deployment and maintenance of SAP Data Services software along with its infrastructure on
AWS platform (including AWS EC2 Linux and Windows instances for Server and Client part of
SAP Data Services software accordingly)
• Preparation, improvement of deployment automation scripts for SAP Data Services and
underlying OS for Server and Client part (written in Bash, Python and Powershell)
• Maintenance and Troubleshooting of SAP Data Services on existing On-Premise servers
• Maintenance, Troubleshooting and Improvements of ETL Workflows for the application that
is located inside SAP Data Services (one of them considers presentation of S3 Bucket usage
based on AWS IAM role)
• Maintenance and Improvements Preparation of Terraform Scripts for deployment of
underlying infrastructure of SAP Data Services Client and Server part on AWS
• Maintenance and Improvements Preparation of Kubernetes Deployment for Application on
AWS
• Deployment and Maintenance of SAP Business Objects BI Platform for hosting and testing
Application specific Reports. Upgrade and clarification of functionality for external team
• Assessing the results of tests of Infrastructure by Security team. Analyzing the impact for SAP
Data Services, SAP BusinessObjects BI Platform, underlying Linux and Windows Servers and
application based on Reports of Security team and results of scan by JFrog XRay
• Preparation of documentation for SAP Data Services, SAP Business Objects BI Platform
deployment, preparation of deployment and upgrade procedures documentation and
preparation of Security
• Maintenance of Windows and Linux Servers on AWS Platform
• Troubleshooting and preparation of improvements for Java based Web Application. Updating
of configuration and addition of the additional business logic
 • Maintenance of Oracle database for application
• Participation in SCRUM ceremonies (Daily, Planning, Backlog Grooming, Retrospective)
• Interaction with SAP and external teams for coordination and troubleshooting the issues
Key Technologies: SAP Data Services, SAP BusinessObjects BI Platform, Java, Spring, Struts2, Apache
Axis2, KeyCloak, XML, Spring Security, Apache Maven, Oracle, SAML, LDAP, Amazon Web Services,
AWS EC2, AWS SSM, AWS S3, AWS IAM, AWS Oracle RDS, Tomcat, Kubernetes, Terraform, SQL, Red
Hat Enterprise Linux 8, Windows Server 2019/2022, Bash, Python, Powershell, GitLab, GitLab CI,
Confluence, JFrog Artifactory, JFrog XRay
Results: Improved stability of application by providing fixes to application logic, improved security of
infrastructure for application and SAP Data Services, ready solution for automation of deployment of
SAP Data Services (which was considered as ‘Not possible’ before)
10-2022 – present
Freelancer
Senior Software Developer
Project: Development of Automation Orchestration Platform for handling Enterprise Automation
tasks related to different areas like ITSM, ETL, Instant Messaging, BI, SAP, OS, integration with other
well-known Automation Orchestration Platforms
Customers: Different companies from Banking, Production, Agriculture, Insurance sector, Post
Companies, Software Companies
Responsibilities:
• Preparation of Improvements for Web Administration Console that is prepared by company
based on Full Stack Groovy framework. Making improvements in Front End and Back End
parts.
• Maintenance and Preparation of Improvements for Agent part written in Java that is
responsible for execution of Workload automation.
• Assisting Support team for Troubleshooting customer issues with Web Administration
Console and Agent
• Preparation of new complex features in Web Administration Console
• Preparation of integrations with external systems for Agent component
• Analyzing security reports prepared by customers and preparing the fix for application
• Enhancing application infrastructure and architecture
Key technologies: Java, Groovy, Grails, GORM, Quartz, Gradle, GSP, PostgreSQL, RabbitMQ, SQL,
Hibernate, Spring Boot, Spring Security, Swagger, Spring WebSockets, Log4j, SLF4J, SmartClient.js,
JavaScript, CodeMirror, moment.js, stompjs, JQuery Terminal, jsondiffpatch, GitLab, GitLab CI, JGit,
JSch, Apache Airflow, Azure DataBricks, AWS S3, AWS Batch, AWS StepFunctions, Apache Camel,
ServiceNow, BMC Remedy, JIRA, APIs for Youtube, Twitter, Facebook, Reddit, Tumblr, Instagram,
TikTok, WhatsApp, Telegram, Robot Framework, UiPath, BluePrism, PowerBI, Tableau, SonarQube,
Automic Engine, ANTLR, JavaMelody, Prometheus, Grafana, Data Dog, Micrometer, JMX
Results: Addition of integration with many external systems that was highlighted by external
independent market analysis company, presentation of revolutionary Automation Platform version
control for Tasks Design by GIT, introduction of replacement of Automic Engine functionality by
company automation platform which was considered by customers as ‘Not possible’
03-2018 – 01.2023
Fujitsu
Senior Software Developer
Project: Development of Hyperconverged Datacenter Infrastructure for SAP Solutions
Customers: Companies in areas of automotive and industrial production, cloud providers, oil
companies, insurance companies, banks, retail companies, jewelry companies, airline companies,
Consulting companies, Hardware vendors, Governmental Agencies and Software Development
companies
Responsibilities:
• SAP systems integration in clustered stack delivered by Fujitsu
• OS tuning and maintenance, writing adaptations for High Availability software. Development
and extension of Bash and Perl scripts for automation of SAP based procedures
• Development of Java based Management GUI
• Professional consulting on implementation, installation, customization and optimization of
SAP software and related solutions on demand
• Maintenance of internal hardware and SAP infrastructure
• Preparation of developer and user documentation for installation and maintenance of SAP
systems and hardware/virtualization systems
• Preparation of internal documentation for QA and other developers of team
• Investigation of customer issues and bug fixing
• Analyzing and preparation of concepts, PoCs and solutions for additional customer side
projects
• Preparation of Best Practice documents for Fujitsu solutions
• Planning and controlling the log of Project in terms of release features and deadlines meeting
• Mentoring Junior colleagues and organization of JIRA issues distribution, assuring the
implementation by team members
• Acting as interface to partners (such as NetApp, SUSE, SAP)
• Leading the team of 10 persons, organizing planning sessions, reporting to senior
management about team results
Key Technologies: Java, Swing, Maven, SAP HANA, SAP NetWeaver, SAP Business Objects BI Platform,
SAP LaMa, SAP Content Server, SAP S/4HANA, SAP Solution Manager, SAP ASE, IBM DB2, SAP MaxDB,
SAP NetWeaver, SAP TREX, Oracle, Perl, Bash, SUSE Linux, SUSE Rancher, openLDAP, Fuiitsu Servers and
Storage, NetApp NAS Storage, VMWare ESX, SUSE KVM, LaTeX, Networking technologies, Kubernetes,
CVS, GIT
Results: Improved revenue of product selling by 50%, improved quality of code base for components,
improved count of new signed contracts for new SAP systems orchestration and SAP related features
applications, prepared multiple projects for specific features orchestration (SAP ASCS Split, Non-
Volatile Memory application for SAP HANA, Configuration and implementation of HANA Smart Data
Integration, NFS v4 implementation for SAP based clusters, implementation of SAN storage usage for
SAP HANA shared volumes, SAP HANA Multi-Node configuration for Disaster Recovery in Long
Distance Data Center Infrastructure, preparation of concepts for copying of SAP HANA based
systems ). Successfully introduced multiple Change Requests (including SAP Business Objects BI
Platform 4.3 integration and High Availability, support of Fast Restart option for SAP HANA,
improvements in support tool of SUSE), improved support for SUSE Rancher deployment and
configuration concept, improved virtualization support for SAP HANA based solutions.
03.2018 – 10.2018
Fujitsu
Quality Assurance specialist
Project: Development of Web Page for professional support and services for Cloud solutions
migrations and orchestration
Customer: Internal Fujitsu Customer
Responsibilities:
• Implementation of automatic acceptance tests
• Adaptation of Backend integration tests
• Gathering and analyzing the requirements for preparation of solution
• Implementation of automated Vue.js integration tests for Frontend module
Key technologies: Java, Groovy, JavaScript, Vue.js, JHipster, Spring Boot, AWS, MySQL, Katalon
Studio, Maven, Intellij Idea, Docker, Gatling, GIT
Results: Improved automated test coverage

03.2017 – 03.2018
Comarch
Quality Assurance Specialist
Project: Automated testing of CRM core and Customer Portal
Customers: Insurance company, Loyalty Program Company, the Bank and Airlines operator.
Responsibilities:
• Manual End – to – End tests of frontend
• Preparation of automation scripts for REST API and SOAP API functional blackbox testing
• Preparation of scripts for automated UI testing
• Preparation of automated performance testing scripts for REST API
• Mobile applications testing
Key Technologies: Apache JMeter, Beanshell, Groovy, Java, Selenium, Android, SVN
Results: Improved test coverage and quality of product

06-2016 – 03-2017
Comarch
Java Software Developer
Project: Development of CRM core and extensions
Customer: Restaurant network
Responsibilities:
• Full stack development of extensions for CRM components: Back Office, Contact Center,
Business Administration and Logistics modules
• Backend and REST/SOAP API development
• Development and extension of Database schema by preparation of SQL scripts
• Adjustment of Frontend and templating engine for Frontend
 • Bug fixing
Key technologies: JavaEE, Oracle Database, SQL, PL/SQL, EclipseLink, Apache Tiles, ExtJS, Maven, Ant,
Eclipse, WebLogic, SVN
Results: Improved stability of application, the project success was highlighted by customer.