System Engineer, DevOps, Telecommunication Engineer, Billing/BSS/OCS Engineer, Test Manager, Test Engineer
Aktualisiert am 06.12.2024
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 06.12.2024
Verfügbar zu: 100%
davon vor Ort: 20%
DevOps
Testautomatisierung
Systems Engineering
Google Cloud
Kubernetes
RedHat
SUSE Linux Enterprise Server
JBoss Application Server
Apache HTTP Server
Helm
Terraform
Ansible
Groovy
Jenkins
Bourne-again-shell
OCS
CI/CD
KarateUI
Cucumber
Telekommunikation
Serbian
Muttersprache
English
Fluent
German
B2-level
Russian
Fortgeschritten

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

1 Jahr 1 Monat
2023-01 - 2024-01

Manage Google Cloud Platform-GCP environment

System Telco Engineer ? InfraOps/DevOps
System Telco Engineer ? InfraOps/DevOps
  • Manage Google Cloud Platform-GCP environment, including managing VM instances, upgrading Google Kubernetes Engine-GKE, autoscaling, node pool sizing, and pod strategy; scripting by Terraform
  • OCS MTX-5255/5263 installation/update based on Helm chat; manage configuration, build docker images
  • Managing Kubernetes based on GKE 1.27: namespace, service, stateful set jobs, daemons, pods, encryption
  • OCS system test and system integration tests execution: GKE on-host-maintenance tests, node pool scaling, replica scaling; OCS MTX engine/TRA-RT/TRA-LB/RSGW/SBA/EFS/Pricing-Controller/MNPDB high-availability tests
  • Performing OCS upgrade 5255 to 5263/5271, including checkpoint validation, data fix, pricing loading, and migration.
  • Performance Test: making test strategy document; presenting it to the customer and stockholders
  • Develop and integrate performance tools at Kubernetes environment: build Docker performance engines; seagull Diameter-Gx,Sy, Ro configuration; traffic generator based on Perl; utilization collection and test execution; 5g test setup and execution by MTX tools; manage JMeter provision test by REST interface.
  • Performance test execution, including checkpoints loading, sessions clean, and OCS MTX platform tune-up;
  • Monitoring GCP/GKE environment and OCS system based on Prometheus, Grafana, node-exporter, SNMP-exporter, and managing logs by fluend
Telefonica / Matrixx
1 Jahr 10 Monate
2020-11 - 2022-08

Zensus

System Engineer - DevOps
System Engineer - DevOps
  • System administration activities such as certification, user management, SUSE 12p OS patching, kernel configuration, firewall configuration, managing repositories, system monitoring by Ansible
  • JBoss-EAP 7.1.6/7.4.1/7.4.2 installation, patching and configuration, JDK upgrade, managing store keys; multi-instance configuration
  • Configuration and troubleshooting SPRINGBOOT Framework application
  • Apache 2.52 Proxy installation and configuration; certification; log rotation;
  • CI/CD pipeline implementation with SCM, NEXUS, GIT, MAVEN
  • Automatization with ANSIBLE 2.4, HW check; FireWall Check; Network Check; OEMs installation and setup; JBOSS-EAP 7.16/7.4.1 installation and multi-instances configuration, system user handling, system administration, Inventories; PKI Certification;
  • Automatization Application deployment, managing modules, deployments files, Jolokia plugging, modules, port offsets, and data sources and managing keystore by Ansible/vault, developing BASH scripts
  • Automatization Oracle 19.2. activities based on BFW framework using PL/SQL packages loading; ownership setup; running .sql scripts by Ansible;
  • Jenkins defining pipeline with Groovy, integration Ansible playbooks, and reporting, extensive pipeline integration by triggers
  • Integration of cucumber test automation and reporting
Statistisches Bundesamt
6 Monate
2020-02 - 2020-07

Maintained Test Detail Design

System Test Engineer
System Test Engineer
  • Maintained Test Detail Design, Test Report, and communication with stakeholders
  • Provided entire XML/JSON API solutions for test automation based on Cucumber Framework/Karate framework, Gherkin and Xpath and JsonPath
  • Providing CI/CD solutions based on git, Apache maven, bitbucket, and Jenkins
  • Test GUI automatization based on page object modeling using karate UI, Test-open, and Selenium tools
  • Test case problems identification, defect reporting and corresponding with R&D unit and daily reporting by JIRA/X-ray tool
Lufthansa Rebuild ? Digital Transformation / Publicis Sapient Group
6 Monate
2019-01 - 2019-06

maintained Test Detail Design

BSS System Engineer -Test team leader
BSS System Engineer -Test team leader
  • BSS Test team lead, maintained Test Detail Design, Test Report, and facing communication with other stakeholders
  • Effectively manage risk and issues against BRD/HLD/LLD following eTOM, creating additional test cases matching each of the functional/ non-functional requirements.
  • Performed system integration tests, functional tests, and end-end Angular tests with Selenium, REST API with Postman and Cucumber framework
  • Test case problems identification by analyzing SOAP/REST interfaces and JBoss Fuse logs; Defect reporting and corresponding with development
Tango BSS / Proximus Group
9 Monate
2017-08 - 2018-04

maintained Test Detail Design and Test Report

BSS/OCS Performance Test Manager
BSS/OCS Performance Test Manager
  • Lead performance test team, maintained Test Detail Design and Test Report and faced communication with customers and internal daily reporting.
  • Developed and executed OCS-signaling performance test focusing on Gy/Sy/SIP interface for data traffic and Ro voice-IMS/voice-CS/SMS/MMS/SIP interfaces using Seagull 1.8.3 tool (sipp)
  • Developed a set of tools for signaling analyses and report automation
  • Preformed activities on customer/contracts provision and validation, ensuring requested subscribers blend on RM using JMeter 3.2 tool and set products and products offers up using SoapUI
  • Developed a set of tools for signaling analyses and reported automation using Ansible and Python
  • CHA CORE/ACCESS TPGs service troubleshoot, found a defect, and resolved them using JIRA
  • Analyzed ?Revenue Manager RM- 17A35? system behavior, including Charging service -CHA, Message Blocker- Active MQ Artemis, Data Model - CIL Cassandra, JVM and system utilisations using VMWare VSphere and REDHAT 7.2 tools
  • Designed and executed non-functional/functional tests such as Backup MSV/CIL/EPS/F5, Orchestration Layer High Availability ? OE/OOADM/OODB
T-Mobile CZ / Ericsson Czech Republic
8 Monate
2017-01 - 2017-08

Provided entire solutions for test automation

CMS/SMSC Telco System engineer
CMS/SMSC Telco System engineer
  • Provided entire solutions for test automation and MAP v3/SIP /SMPP 3.4 validation tools
  • Designed and performed End-to-End functional and inter-operability SMSC tests using the automation framework ?cucumber.?
  • Provided analyses, fine-tuning, system configuration, and SS7/M3UA configuration of the USP-M 4.3 (Open Call) platform
  • Reviewed test results, validated test requirements, and presented the system functionality in front of the customer
  • Maintained functional analyses focusing on MAP signaling and LA SMPP v3.4 external interfaces having communication with the third party, finding defects and resolving them
  • Configured WebRule Engine using CLIPS, provisioned LA user on OpenLDAP with Soap UI, set up LA functionality into MongoDB, tested Web-Multi User Interface with Selenium API
Deutsche Telekom ?Germany / Hewlett Packard Enterprises
11 Monate
2016-02 - 2016-12

Prepared operation procedure, including checking signaling

NGIN/PCRF/OCS System engineer
NGIN/PCRF/OCS System engineer
  • Preformed NgIN -Huawei tests for services: EMVT, CCAC, Multi Card, VPN, Zoning, PPS, IMS AS-Pass, mVoLTE
  • Prepared operation procedure for ngIN services, including checking signaling -CAMEL: CAP1/CAP3/ATI/ATIS/SIP and provision SOAP interface
  • Prepared ENIP -ngIN platform procedure including OS-Suse 11Sp4/ Volume Manager -VxVM -4.1 and LVM, checking Cluster Veritas Cluster?VCS 4.1, Linux-HA?peacemaker/corosys, Oracle 11RAC checks
  • Executed PCRF- UPCC -Huawei acceptance tests focusing on Gx/Sy -TS 29.212/219 interface; subscriber/service Management by P-GW and by UPPC client -MML interface
  • Handled OCS Altamira 12.05 -Ericsson system, managed regression tests as subscriber provision by SOAP UNICA interface managing Numbering, BoltOn, and Rating plan services, and tracing and analyzing Gy, Rx, ASN.1, and SMPP 3.4 interfaces.
  • Test case problems identification, defect reporting and corresponding with vendor and daily reporting
Telefonica O2 ? Germany / ZTE Services
9 Monate
2015-04 - 2015-12

Provided functional /system analyses

BSS/OCS System analyst - TWPC CCS ? Huawei Converged Charging System
BSS/OCS System analyst - TWPC CCS ? Huawei Converged Charging System
  • Provided functional /system analyses, technical telco-consultancy, and business risk assessment to stakeholders
  • Ensured integration toward core network elements Cisco -PGWs including specified Gy interface for third-party system
  • Analyzed Sy interface based on toward ALU-PCRF and bandwidth control functionally facing cohesive service design
  • Assessed Huawei-Smart Pricing service solution, proposing service and hardware OCS solution change requests
  • Functional use case definition focusing on the Rating & Charging, Group Service, and Bandwidth control aspects ensuring signaling messaging flow
  • Managed tailor test approaches according to various factors, managing potential risk defining and shaping test strategy
  • Defended Test cases and performed acceptance/ regression tests for online charging and bandwidth/limit control functionalities focusing on Diameter Gy/Sy interfaces
VODAFONE ? Germany
1 Jahr 5 Monate
2013-07 - 2014-11

Analyzed proposed BSS/Online Charging System

OCS System analyst - TWPC CCS ?ALU Online Charging System
OCS System analyst - TWPC CCS ?ALU Online Charging System
  • Analyzed proposed BSS/Online Charging System, assessed functionality and entire platform solution, identifying high availability/Geo-Redundancy and Performance requirements in the High-Level Design and Low-Level Design documents.
  • Defined OCS technical SS7-SINAP/CAP/MAP/Diameter interface specification matching desired interaction with existing core network
  • Assessed BSS/OCS Services and particular functionality according to technical requirements for the following work streams: Rating & Charging, IP-Data session control, Cross Feature (Friend and Family, Group Call, Mobile Number Portability), Product Offer, Subscriptions and subscriber USSD management, Rating Period, Event Charging, Bill Shock Prevention and Data roaming notification
  • Effectively manage risk and issues against HLD/LLD, creating additional test cases matching each of the functional/ non-functional requirements.
  • Prepared and performed acceptance and interoperability test cases focusing on the DIAMETER DCCA 2.1/CAMEL x/SINAP-7m technical analyses
VODAFONE ? Germany
1 Jahr 5 Monate
2012-03 - 2013-07

Handling all technical aspects

BSS/VAS Senior Software Engineer
BSS/VAS Senior Software Engineer
  • Handling all technical aspects, delivering business values through the technical expertise of additional text messaging services for EMG-5.1 VAS platform using PL/SQL and OO PERL solutions
  • Writing technical papers and manuals on the VAS systems and architectural challenges to clarify and sign off the scope documents
  • Interacting with counterparts from operational departments
  • Ensured the system architecture, service design, and entire implementation conformed to the business and system requirements
  • Created detailed design documents for the TAP tool and SS7/MAP interface specifications
  • Designed TAP tool based on PERL OO and CPAN modules
  • Provided specifications for SOAP provisioning interfaces, CDR call extracting, and SS7/CAP/MAP/Ro trace verification
  • Designed Perl Modules and external call simulator API/Web UI using Python/jQuery/Ajax web technology
ICM Solutions Ltd ?Serbia
7 Jahre 4 Monate
2004-08 - 2011-11

Provided Second Line support

IN TAC2 System Engineer ? Online Convergent Charging System Projects
IN TAC2 System Engineer ? Online Convergent Charging System Projects
  • Provided Second Line support, integration, configuration, maintenance, troubleshooting, fault reporting, SS7-INAP, CAP, SIP signaling analyses and hot fix deployment for Online Convergent Charging systems such as Charge@once Unified 3.1, Charge@once Select 1.5, TopUp V1.5, Care@once V8.0, IN Classic 7b, Service Xpress 3.5, IN@vantage 7.5/7.6.2, V8.0@commander 7.x/8.4/9.0, HLRd 3.0, railways@vantage 3.0
  • Handled activities such as system commission, installation, integration, and SW update for the entire BSS products portfolio
  • HW maintained, upgraded and monitored for the following platforms: Sun Microsystem ( SunFire-V440/890/6900 ) campus, Fujitsu-Siemens Computers ( RM 600 E80, PrimePower 1500/2500 ), HP DL 380 G7, EMC CX4-120 including maintenance and administration of following OEM Software: OS SOLARIS 5.08/09/10, SUN CLUSTER3.1, PRIMECLUSTER 4.0, VERITAS Volume Manager 3.2, SDS 4.2; ORACLE AS R9i02, Informix 3.2, Networker-FSC 6A20, F5 Load balancer Big-IP 1600, Telesys 3.1, Utilcom/Signalware v8.02
Zain Group ? Kuwait; Vodacom, CellC ? South Africa; OTE, ERGOS ? Greece; UMC ? Ukraine; NSCB, Proximus ? Belgium; SFR? France / Nokia Siemens Networks, Siemens COM
4 Jahre 9 Monate
2003-08 - 2008-04

RFP/RFQ process, system, and service requirements

Main IN Engineer / Software Engineer
Main IN Engineer / Software Engineer
  • Responsible for RFP/RFQ process, system, and service requirements
  • Analyzed Pre-paid service solutions and technical project data and ensured integration to the Ericsson MSC/HLR/SOG/BGW
  • Responsible for definition migration process of pre-paid subscriber data, including platform deploying provision interworking with BSS
  • Investigating for innovations and providing technical and strategic consultancy to high-level management
  • Main responsible during integration, acceptance and migration test phase, providing reports and presentations to management
  • Develop ETSI CDR formatted /BGW/IN-Classic and in-house DW based 
Telekom Srbija - Mobile Network Division
6 Monate
2003-08 - 2004-01

Operating, administration, and maintaining pre-paid system

BSS System Engineer For Mobile Communications division? MTS
BSS System Engineer For Mobile Communications division? MTS
  • Operating, administration, and maintaining pre-paid system ORGA PPS 1.0 voucher system PRESS1.1, IVR system SG5 - Shembarge Sema/LHS, mediation devices BGW 9.16/ SOG ?Ericsson
  • Development of in-house CDR-based Data-ware house and CRM and developing MML interfaces for an in-house anti-fraud solution
Telekom Serbia AD

Aus- und Weiterbildung

Aus- und Weiterbildung

1 Jahr 5 Monate
2009-08 - 2010-12

MBA

Athens University of Economics & Business
Athens University of Economics & Business

  • Major in Finance
  • Master these: Business Plan ?PC proficiency.?
  • Focused on the following courses: Project Management, Managerial Accounting -Budgeting, Leadership & Emotional intelligence, Project Finance

6 Jahre 7 Monate
1993-09 - 2000-03

Diploma Engineer

The University of Belgrade, Faculty of Electrical Engineering
The University of Belgrade, Faculty of Electrical Engineering

  • emphasis on Telecommunications
  • These:?10Gb Ethernet?

Kompetenzen

Kompetenzen

Top-Skills

DevOps Testautomatisierung Systems Engineering Google Cloud Kubernetes RedHat SUSE Linux Enterprise Server JBoss Application Server Apache HTTP Server Helm Terraform Ansible Groovy Jenkins Bourne-again-shell OCS CI/CD KarateUI Cucumber Telekommunikation

Produkte / Standards / Erfahrungen / Methoden

TELCO SKILLS

  • Core/IN: SINAP 7m+, CAMEL ph1/ph2/ph3, MTP, SCCP, TCAP, MAPv1/v2/v3, SIGTRAN, M2UA/M3UA, ISUP, SIP AS, RTP
  • Diameter: DCCA 2.1 RFC 3588/4006/ IMS- TS 32.640/TS 32.299, PCRF- Sy, TS 29.219, Gx 29.212, Ro-voice TS 32.260


IT SKILLS

High-Availability

  • Veritas Cluster?VCS 4.1
  • Linux-HA?peacemaker/corosys
  • Sun Cluster 3.1, Prime Cluster- FSC


Volume Management

  • LVM
  • VERITAS Manager 3.2/4.1
  • Solaris SDS 4.2


OEMs

  • Legato FSC-Networkers 6A20, Enterprise DB -BART Backup
  • HP Open View, Zabbix


Networking

  • Services: Apache 2.0, SFTP, SSH, DNS, Rsync
  • F5 load Balancer Big-IP 1600
  • Cisco: Catalyst 24xx


Virtualization

  • VmVare: VMWare ESX 5.0, Vsphere
  • KVM: Virtual Management, virsh tool
  • Kubernetes, helm chart, Docker


Tools

  • Jira, Confulance, X-ray, Agile-Hive
  • HP ALM
  • IBM ClearQuest


Social skills and competencies:

Analytical, systematical, self-motivated, open to innovations, communicative, able to make a rational decision under time pressure

Betriebssysteme

RedHat Enterprises RHEL 7.2
SuSe 11sp4/ 12sp5
Sun Solaris OS 5.8
Sun Solaris OS 5.9
Schell Scripting Bash/Korn

Programmiersprachen

Ansible
Selenium
Cucumber
Jenkins
Soup UI
Jmeter
Seagull
Postman
OO Perl
PL/SQL
C
LUA
Javascript ES6

Datenbanken

mysql 5.5
Cassandra
PostgreSQL ? Enterprise DB Management / Backup BART
NoSql
MongoDb, ElastiSearch -ELK
Oracle
Oracle 11i AS, Oracle 11RAC, Data Guard
INFORMIX 3.2

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

1 Jahr 1 Monat
2023-01 - 2024-01

Manage Google Cloud Platform-GCP environment

System Telco Engineer ? InfraOps/DevOps
System Telco Engineer ? InfraOps/DevOps
  • Manage Google Cloud Platform-GCP environment, including managing VM instances, upgrading Google Kubernetes Engine-GKE, autoscaling, node pool sizing, and pod strategy; scripting by Terraform
  • OCS MTX-5255/5263 installation/update based on Helm chat; manage configuration, build docker images
  • Managing Kubernetes based on GKE 1.27: namespace, service, stateful set jobs, daemons, pods, encryption
  • OCS system test and system integration tests execution: GKE on-host-maintenance tests, node pool scaling, replica scaling; OCS MTX engine/TRA-RT/TRA-LB/RSGW/SBA/EFS/Pricing-Controller/MNPDB high-availability tests
  • Performing OCS upgrade 5255 to 5263/5271, including checkpoint validation, data fix, pricing loading, and migration.
  • Performance Test: making test strategy document; presenting it to the customer and stockholders
  • Develop and integrate performance tools at Kubernetes environment: build Docker performance engines; seagull Diameter-Gx,Sy, Ro configuration; traffic generator based on Perl; utilization collection and test execution; 5g test setup and execution by MTX tools; manage JMeter provision test by REST interface.
  • Performance test execution, including checkpoints loading, sessions clean, and OCS MTX platform tune-up;
  • Monitoring GCP/GKE environment and OCS system based on Prometheus, Grafana, node-exporter, SNMP-exporter, and managing logs by fluend
Telefonica / Matrixx
1 Jahr 10 Monate
2020-11 - 2022-08

Zensus

System Engineer - DevOps
System Engineer - DevOps
  • System administration activities such as certification, user management, SUSE 12p OS patching, kernel configuration, firewall configuration, managing repositories, system monitoring by Ansible
  • JBoss-EAP 7.1.6/7.4.1/7.4.2 installation, patching and configuration, JDK upgrade, managing store keys; multi-instance configuration
  • Configuration and troubleshooting SPRINGBOOT Framework application
  • Apache 2.52 Proxy installation and configuration; certification; log rotation;
  • CI/CD pipeline implementation with SCM, NEXUS, GIT, MAVEN
  • Automatization with ANSIBLE 2.4, HW check; FireWall Check; Network Check; OEMs installation and setup; JBOSS-EAP 7.16/7.4.1 installation and multi-instances configuration, system user handling, system administration, Inventories; PKI Certification;
  • Automatization Application deployment, managing modules, deployments files, Jolokia plugging, modules, port offsets, and data sources and managing keystore by Ansible/vault, developing BASH scripts
  • Automatization Oracle 19.2. activities based on BFW framework using PL/SQL packages loading; ownership setup; running .sql scripts by Ansible;
  • Jenkins defining pipeline with Groovy, integration Ansible playbooks, and reporting, extensive pipeline integration by triggers
  • Integration of cucumber test automation and reporting
Statistisches Bundesamt
6 Monate
2020-02 - 2020-07

Maintained Test Detail Design

System Test Engineer
System Test Engineer
  • Maintained Test Detail Design, Test Report, and communication with stakeholders
  • Provided entire XML/JSON API solutions for test automation based on Cucumber Framework/Karate framework, Gherkin and Xpath and JsonPath
  • Providing CI/CD solutions based on git, Apache maven, bitbucket, and Jenkins
  • Test GUI automatization based on page object modeling using karate UI, Test-open, and Selenium tools
  • Test case problems identification, defect reporting and corresponding with R&D unit and daily reporting by JIRA/X-ray tool
Lufthansa Rebuild ? Digital Transformation / Publicis Sapient Group
6 Monate
2019-01 - 2019-06

maintained Test Detail Design

BSS System Engineer -Test team leader
BSS System Engineer -Test team leader
  • BSS Test team lead, maintained Test Detail Design, Test Report, and facing communication with other stakeholders
  • Effectively manage risk and issues against BRD/HLD/LLD following eTOM, creating additional test cases matching each of the functional/ non-functional requirements.
  • Performed system integration tests, functional tests, and end-end Angular tests with Selenium, REST API with Postman and Cucumber framework
  • Test case problems identification by analyzing SOAP/REST interfaces and JBoss Fuse logs; Defect reporting and corresponding with development
Tango BSS / Proximus Group
9 Monate
2017-08 - 2018-04

maintained Test Detail Design and Test Report

BSS/OCS Performance Test Manager
BSS/OCS Performance Test Manager
  • Lead performance test team, maintained Test Detail Design and Test Report and faced communication with customers and internal daily reporting.
  • Developed and executed OCS-signaling performance test focusing on Gy/Sy/SIP interface for data traffic and Ro voice-IMS/voice-CS/SMS/MMS/SIP interfaces using Seagull 1.8.3 tool (sipp)
  • Developed a set of tools for signaling analyses and report automation
  • Preformed activities on customer/contracts provision and validation, ensuring requested subscribers blend on RM using JMeter 3.2 tool and set products and products offers up using SoapUI
  • Developed a set of tools for signaling analyses and reported automation using Ansible and Python
  • CHA CORE/ACCESS TPGs service troubleshoot, found a defect, and resolved them using JIRA
  • Analyzed ?Revenue Manager RM- 17A35? system behavior, including Charging service -CHA, Message Blocker- Active MQ Artemis, Data Model - CIL Cassandra, JVM and system utilisations using VMWare VSphere and REDHAT 7.2 tools
  • Designed and executed non-functional/functional tests such as Backup MSV/CIL/EPS/F5, Orchestration Layer High Availability ? OE/OOADM/OODB
T-Mobile CZ / Ericsson Czech Republic
8 Monate
2017-01 - 2017-08

Provided entire solutions for test automation

CMS/SMSC Telco System engineer
CMS/SMSC Telco System engineer
  • Provided entire solutions for test automation and MAP v3/SIP /SMPP 3.4 validation tools
  • Designed and performed End-to-End functional and inter-operability SMSC tests using the automation framework ?cucumber.?
  • Provided analyses, fine-tuning, system configuration, and SS7/M3UA configuration of the USP-M 4.3 (Open Call) platform
  • Reviewed test results, validated test requirements, and presented the system functionality in front of the customer
  • Maintained functional analyses focusing on MAP signaling and LA SMPP v3.4 external interfaces having communication with the third party, finding defects and resolving them
  • Configured WebRule Engine using CLIPS, provisioned LA user on OpenLDAP with Soap UI, set up LA functionality into MongoDB, tested Web-Multi User Interface with Selenium API
Deutsche Telekom ?Germany / Hewlett Packard Enterprises
11 Monate
2016-02 - 2016-12

Prepared operation procedure, including checking signaling

NGIN/PCRF/OCS System engineer
NGIN/PCRF/OCS System engineer
  • Preformed NgIN -Huawei tests for services: EMVT, CCAC, Multi Card, VPN, Zoning, PPS, IMS AS-Pass, mVoLTE
  • Prepared operation procedure for ngIN services, including checking signaling -CAMEL: CAP1/CAP3/ATI/ATIS/SIP and provision SOAP interface
  • Prepared ENIP -ngIN platform procedure including OS-Suse 11Sp4/ Volume Manager -VxVM -4.1 and LVM, checking Cluster Veritas Cluster?VCS 4.1, Linux-HA?peacemaker/corosys, Oracle 11RAC checks
  • Executed PCRF- UPCC -Huawei acceptance tests focusing on Gx/Sy -TS 29.212/219 interface; subscriber/service Management by P-GW and by UPPC client -MML interface
  • Handled OCS Altamira 12.05 -Ericsson system, managed regression tests as subscriber provision by SOAP UNICA interface managing Numbering, BoltOn, and Rating plan services, and tracing and analyzing Gy, Rx, ASN.1, and SMPP 3.4 interfaces.
  • Test case problems identification, defect reporting and corresponding with vendor and daily reporting
Telefonica O2 ? Germany / ZTE Services
9 Monate
2015-04 - 2015-12

Provided functional /system analyses

BSS/OCS System analyst - TWPC CCS ? Huawei Converged Charging System
BSS/OCS System analyst - TWPC CCS ? Huawei Converged Charging System
  • Provided functional /system analyses, technical telco-consultancy, and business risk assessment to stakeholders
  • Ensured integration toward core network elements Cisco -PGWs including specified Gy interface for third-party system
  • Analyzed Sy interface based on toward ALU-PCRF and bandwidth control functionally facing cohesive service design
  • Assessed Huawei-Smart Pricing service solution, proposing service and hardware OCS solution change requests
  • Functional use case definition focusing on the Rating & Charging, Group Service, and Bandwidth control aspects ensuring signaling messaging flow
  • Managed tailor test approaches according to various factors, managing potential risk defining and shaping test strategy
  • Defended Test cases and performed acceptance/ regression tests for online charging and bandwidth/limit control functionalities focusing on Diameter Gy/Sy interfaces
VODAFONE ? Germany
1 Jahr 5 Monate
2013-07 - 2014-11

Analyzed proposed BSS/Online Charging System

OCS System analyst - TWPC CCS ?ALU Online Charging System
OCS System analyst - TWPC CCS ?ALU Online Charging System
  • Analyzed proposed BSS/Online Charging System, assessed functionality and entire platform solution, identifying high availability/Geo-Redundancy and Performance requirements in the High-Level Design and Low-Level Design documents.
  • Defined OCS technical SS7-SINAP/CAP/MAP/Diameter interface specification matching desired interaction with existing core network
  • Assessed BSS/OCS Services and particular functionality according to technical requirements for the following work streams: Rating & Charging, IP-Data session control, Cross Feature (Friend and Family, Group Call, Mobile Number Portability), Product Offer, Subscriptions and subscriber USSD management, Rating Period, Event Charging, Bill Shock Prevention and Data roaming notification
  • Effectively manage risk and issues against HLD/LLD, creating additional test cases matching each of the functional/ non-functional requirements.
  • Prepared and performed acceptance and interoperability test cases focusing on the DIAMETER DCCA 2.1/CAMEL x/SINAP-7m technical analyses
VODAFONE ? Germany
1 Jahr 5 Monate
2012-03 - 2013-07

Handling all technical aspects

BSS/VAS Senior Software Engineer
BSS/VAS Senior Software Engineer
  • Handling all technical aspects, delivering business values through the technical expertise of additional text messaging services for EMG-5.1 VAS platform using PL/SQL and OO PERL solutions
  • Writing technical papers and manuals on the VAS systems and architectural challenges to clarify and sign off the scope documents
  • Interacting with counterparts from operational departments
  • Ensured the system architecture, service design, and entire implementation conformed to the business and system requirements
  • Created detailed design documents for the TAP tool and SS7/MAP interface specifications
  • Designed TAP tool based on PERL OO and CPAN modules
  • Provided specifications for SOAP provisioning interfaces, CDR call extracting, and SS7/CAP/MAP/Ro trace verification
  • Designed Perl Modules and external call simulator API/Web UI using Python/jQuery/Ajax web technology
ICM Solutions Ltd ?Serbia
7 Jahre 4 Monate
2004-08 - 2011-11

Provided Second Line support

IN TAC2 System Engineer ? Online Convergent Charging System Projects
IN TAC2 System Engineer ? Online Convergent Charging System Projects
  • Provided Second Line support, integration, configuration, maintenance, troubleshooting, fault reporting, SS7-INAP, CAP, SIP signaling analyses and hot fix deployment for Online Convergent Charging systems such as Charge@once Unified 3.1, Charge@once Select 1.5, TopUp V1.5, Care@once V8.0, IN Classic 7b, Service Xpress 3.5, IN@vantage 7.5/7.6.2, V8.0@commander 7.x/8.4/9.0, HLRd 3.0, railways@vantage 3.0
  • Handled activities such as system commission, installation, integration, and SW update for the entire BSS products portfolio
  • HW maintained, upgraded and monitored for the following platforms: Sun Microsystem ( SunFire-V440/890/6900 ) campus, Fujitsu-Siemens Computers ( RM 600 E80, PrimePower 1500/2500 ), HP DL 380 G7, EMC CX4-120 including maintenance and administration of following OEM Software: OS SOLARIS 5.08/09/10, SUN CLUSTER3.1, PRIMECLUSTER 4.0, VERITAS Volume Manager 3.2, SDS 4.2; ORACLE AS R9i02, Informix 3.2, Networker-FSC 6A20, F5 Load balancer Big-IP 1600, Telesys 3.1, Utilcom/Signalware v8.02
Zain Group ? Kuwait; Vodacom, CellC ? South Africa; OTE, ERGOS ? Greece; UMC ? Ukraine; NSCB, Proximus ? Belgium; SFR? France / Nokia Siemens Networks, Siemens COM
4 Jahre 9 Monate
2003-08 - 2008-04

RFP/RFQ process, system, and service requirements

Main IN Engineer / Software Engineer
Main IN Engineer / Software Engineer
  • Responsible for RFP/RFQ process, system, and service requirements
  • Analyzed Pre-paid service solutions and technical project data and ensured integration to the Ericsson MSC/HLR/SOG/BGW
  • Responsible for definition migration process of pre-paid subscriber data, including platform deploying provision interworking with BSS
  • Investigating for innovations and providing technical and strategic consultancy to high-level management
  • Main responsible during integration, acceptance and migration test phase, providing reports and presentations to management
  • Develop ETSI CDR formatted /BGW/IN-Classic and in-house DW based 
Telekom Srbija - Mobile Network Division
6 Monate
2003-08 - 2004-01

Operating, administration, and maintaining pre-paid system

BSS System Engineer For Mobile Communications division? MTS
BSS System Engineer For Mobile Communications division? MTS
  • Operating, administration, and maintaining pre-paid system ORGA PPS 1.0 voucher system PRESS1.1, IVR system SG5 - Shembarge Sema/LHS, mediation devices BGW 9.16/ SOG ?Ericsson
  • Development of in-house CDR-based Data-ware house and CRM and developing MML interfaces for an in-house anti-fraud solution
Telekom Serbia AD

Aus- und Weiterbildung

Aus- und Weiterbildung

1 Jahr 5 Monate
2009-08 - 2010-12

MBA

Athens University of Economics & Business
Athens University of Economics & Business

  • Major in Finance
  • Master these: Business Plan ?PC proficiency.?
  • Focused on the following courses: Project Management, Managerial Accounting -Budgeting, Leadership & Emotional intelligence, Project Finance

6 Jahre 7 Monate
1993-09 - 2000-03

Diploma Engineer

The University of Belgrade, Faculty of Electrical Engineering
The University of Belgrade, Faculty of Electrical Engineering

  • emphasis on Telecommunications
  • These:?10Gb Ethernet?

Kompetenzen

Kompetenzen

Top-Skills

DevOps Testautomatisierung Systems Engineering Google Cloud Kubernetes RedHat SUSE Linux Enterprise Server JBoss Application Server Apache HTTP Server Helm Terraform Ansible Groovy Jenkins Bourne-again-shell OCS CI/CD KarateUI Cucumber Telekommunikation

Produkte / Standards / Erfahrungen / Methoden

TELCO SKILLS

  • Core/IN: SINAP 7m+, CAMEL ph1/ph2/ph3, MTP, SCCP, TCAP, MAPv1/v2/v3, SIGTRAN, M2UA/M3UA, ISUP, SIP AS, RTP
  • Diameter: DCCA 2.1 RFC 3588/4006/ IMS- TS 32.640/TS 32.299, PCRF- Sy, TS 29.219, Gx 29.212, Ro-voice TS 32.260


IT SKILLS

High-Availability

  • Veritas Cluster?VCS 4.1
  • Linux-HA?peacemaker/corosys
  • Sun Cluster 3.1, Prime Cluster- FSC


Volume Management

  • LVM
  • VERITAS Manager 3.2/4.1
  • Solaris SDS 4.2


OEMs

  • Legato FSC-Networkers 6A20, Enterprise DB -BART Backup
  • HP Open View, Zabbix


Networking

  • Services: Apache 2.0, SFTP, SSH, DNS, Rsync
  • F5 load Balancer Big-IP 1600
  • Cisco: Catalyst 24xx


Virtualization

  • VmVare: VMWare ESX 5.0, Vsphere
  • KVM: Virtual Management, virsh tool
  • Kubernetes, helm chart, Docker


Tools

  • Jira, Confulance, X-ray, Agile-Hive
  • HP ALM
  • IBM ClearQuest


Social skills and competencies:

Analytical, systematical, self-motivated, open to innovations, communicative, able to make a rational decision under time pressure

Betriebssysteme

RedHat Enterprises RHEL 7.2
SuSe 11sp4/ 12sp5
Sun Solaris OS 5.8
Sun Solaris OS 5.9
Schell Scripting Bash/Korn

Programmiersprachen

Ansible
Selenium
Cucumber
Jenkins
Soup UI
Jmeter
Seagull
Postman
OO Perl
PL/SQL
C
LUA
Javascript ES6

Datenbanken

mysql 5.5
Cassandra
PostgreSQL ? Enterprise DB Management / Backup BART
NoSql
MongoDb, ElastiSearch -ELK
Oracle
Oracle 11i AS, Oracle 11RAC, Data Guard
INFORMIX 3.2

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