Career

Experience

Where I have worked, the client engagements I have delivered, what I studied and the certificates I have earned.

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01Work

Professional experience

  1. 07/2022 – present Current

    Software Engineer & Consultant

    CognityAthens, Greece

    • Analysis, design, development, testing, deployment and customization of enterprise Order & Service Management (OSM) solutions on Oracle Communications OSM and WebLogic, including specialised testing.
    • Development and customization of complex telecommunications service orchestration and fulfillment flows: order decomposition, provisioning, resource reservation, shipping and service activation.
    • Design and implementation of XQuery/XML-based business logic, integrations, data transformations and OSM workflows.
    • Automated integration and end-to-end testing with Citrus: test scenarios, XML message validation, database validation, test reporting and test automation tooling.
    Show 8 moreShow less
    • Camunda/Zeebe-based orchestration: BPMN workflows, workers, message events, correlation, multi-instance activities, error handling and external service integrations.
    • Development of Java/Spring Boot microservices and executors for workflow automation, service provisioning, callbacks and integration with external systems.
    • Co-developer and contributor on BOB, an AI tool and Spring Boot web application for intelligent workflow/service orchestration and automation.
    • Development of telecommunications demonstration environments and service emulators for automated testing, integration validation and customer demonstrations.
    • Integration with external APIs and enterprise systems: REST APIs, XML/JSON interfaces, databases and asynchronous messaging.
    • Investigation and resolution of complex integration, deployment, workflow, authentication and runtime issues across development, test and customer environments.
    • Technical documentation, implementation manuals, test documentation and solution specifications.
    • Projects SPOC: feasibility, analysis, design, development and deployment.
    • Oracle OSM
    • XQuery
    • XML
    • Java
    • Spring Boot
    • Camunda
    • Zeebe
    • BPMN
    • Citrus
    • Python
    • MySQL
    • SVN
    • Git
    • Keycloak
    • Oracle SOA Suite 12c
    • WebLogic
    • REST
    • Emulator
    • Maven
    • Docker
  2. 02/2022 – 06/2022 5 mos

    Back-End Developer

    INDUST SystemsPatras, Greece

    • Cloud development services on the IoT platform IoTControl, to improve efficiency and reduce energy consumption on production lines.
    • AI-enabled app for product quality control during the pasteurization process, in the European research project zPasteurAIzer.
    • Industrial IoT controllers based on RaspberryPi for the zPasteurAIzer project: receiving production process signals, data pre-processing, sending data to the cloud server, receiving commands from the web services and executing orders in industrial automation.
    • Python
    • TypeScript
    • JavaScript
    • NestJS
    • TypeORM
    • Docker
    • TimescaleDB
    • MySQL
    • Grafana
    • Keycloak
    • Git
    • GitHub
  3. 03/2021 – 02/2022 1 yr Volunteering

    Team Leader, IoT LAB

    Mindspace NGOPatras, Greece

    Leading a team for designing, creating and operating an IoT laboratory in Patras. Mindspace's objective is to foster entrepreneurship and creativity in startups through mentorship and the provision of essential tools.

    • Laboratory organization and management.
    • Coordination and supervision of innovative idea development teams.
    • Transfer of know-how to students and promotion of entrepreneurship.
  4. 03/2021 – 05/2021 3 mos

    Customer Support Engineer (Internship)

    PobucaAthens, Greece

    • Analysis and resolution of technical issues in Business Applications
    • Configure and support Infrastructure requests (Microsoft 365 etc.)
    • Application testing
    • Organization and monitoring of requests and subprojects
    • CRM
    • Microsoft Tools
    • RDP
    • Support
    • Problem Solving

02Engagements

Client engagements

Projects delivered for telecom clients at Cognity, newest first. Filter by client or browse by year.

13 engagements

2026

  1. 02/2026 – 05/2026

    YettelBulgaria

    Yettel Presales

    Presales engagement for Yettel in Bulgaria, February – May 2026 (Cognity, Consultant).

  2. 01/2026 – present Ongoing

    OTEGreece

    Integration & Order Management CRs 2026

    Implementation of new functionalities in Order Management and Integration systems to enable communication between BSS and OSS systems, for Order Management, Customer Management, Trouble Ticketing, Work Force Management, SAP, Collection and other areas.

    More detailsShow less

    The system is built on Oracle SOA Suite 12c, Oracle Communications Order and Service Management (OSM), WebLogic Integration (WLI) and Java EE.

    • Oracle SOA Suite 12c
    • Oracle OSM
    • WebLogic Integration (WLI)
    • Java EE

2025

  1. 10/2025 – present Ongoing

    OTEGreece

    MCV Prepaid One Order Drop

    Implementation of a full digital new subscription based prepaid product.

    More detailsShow less

    The part of the project managed and implemented by Cognity includes the order capture flow (Cosmote One app BFF application) and the order management flow. The solution integrates with various IT systems, such as the One app client, Siebel, Billing, Payment Gateway, SAP, ELTA Courier, the LOGICA prepaid platform, a Contract Management platform and OSM. It is the second full digital product that COSMOTE implements after Prepaid to Postpaid Order.

    • OSM
    • Siebel
    • SAP
  2. 01/2025 – present Ongoing

    OTEGreece

    Mobile OCTs

    Project focused on identifying and resolving IT issues impacting mobile telco orders across order capture, order management and provisioning.

    More detailsShow less

    Key objectives included backlog reduction, root cause analysis, PBI resolution and process automation, with flow redesigns proposed to enhance system reliability and improve the overall customer experience.

  3. 01/2025 – 02/2026

    OTEGreece

    Integration & Order Management CRs 2025

    Implementation of new functionalities in Order Management and Integration systems to enable communication between BSS and OSS systems, for Order Management, Customer Management, Trouble Ticketing, Work Force Management, SAP, Collection and other areas.

    More detailsShow less

    The system is built on Oracle SOA Suite 12c, Oracle Communications Order and Service Management (OSM), WebLogic Integration (WLI) and Java EE.

    • Oracle SOA Suite 12c
    • Oracle OSM
    • WebLogic Integration (WLI)
    • Java EE

2023

  1. 06/2023 – 02/2024

    OTEGreece

    Integration & Order Management CRs 2024

    Implementation of new functionalities in Order Management and Integration systems to enable communication between BSS and OSS systems, for Order Management, Customer Management, Trouble Ticketing, Work Force Management, SAP, Collection and other areas.

    More detailsShow less

    The system is built on Oracle SOA Suite 12c, Oracle Communications Order and Service Management (OSM), WebLogic Integration (WLI) and Java EE.

    • Oracle SOA Suite 12c
    • Oracle OSM
    • WebLogic Integration (WLI)
    • Java EE
  2. 06/2023 – 02/2024

    CosmoteGreece

    Manage SIM One Order Drop

    Implementation of the Manage SIM user journey through the Siebel Open UI Customer 360 View for B2B and B2C customers, using modification orders.

    More detailsShow less

    Use cases include SIM Replacement, SIM Swap and Pre to Post with SIM Change, for all SIM card types (Physical, eSIM, Twin, Multi SIM, XSIM).

    • Siebel Open UI
  3. 06/2023 – 02/2024

    CosmoteGreece

    Digital Onboarding for Prepaid products

    Cosmote intends to give its customers the opportunity to order and manage prepaid subscriptions through digital channels.

    More detailsShow less

    The project supports the purchase of prepaid SIM cards (Cosmokarta, WU, Frog and IOTG), as well as SIM activation and onboarding. The in-scope digital touchpoints are the MyCosmote App & Site, the WU App & Site and the Frog App & Site: the MyCosmote App supports the flows through native implementation and the other touchpoints incorporate an SPA solution. Cognity executes the project end to end across Digital (SPA, Common BFF microservices), OM (OSM, OSB, OM microservices) and CRM (Siebel Mobile, Siebel Fixed).

    • OSM
    • OSB
    • Siebel Mobile
    • Siebel Fixed
    • SPA
    • BFF microservices
  4. 03/2023 – 06/2023

    OTEGreece

    Integration & Order Management CRs 2023

    Implementation of new functionalities in Order Management and Integration systems to enable communication between BSS and OSS systems, for Order Management, Customer Management, Trouble Ticketing, Work Force Management, SAP, Collection and other areas.

    More detailsShow less

    The system is built on Oracle SOA Suite 12c, Oracle Communications Order and Service Management (OSM), WebLogic Integration (WLI) and Java EE.

    • Oracle SOA Suite 12c
    • Oracle OSM
    • WebLogic Integration (WLI)
    • Java EE
  5. 01/2023 – 06/2023

    CosmoteGreece

    O2B Microservices CRs 2025

    O2B Microservices change requests for Cosmote (Cognity, Consultant), January – June 2023.

    • Microservices
  6. 01/2023 – 06/2023

    CosmoteGreece

    OM Microservices CRs 2023

    Implementation of various mini and mid size projects in the area of Order Management.

    More detailsShow less

    The main applications are the Number Portability Platform, the Communication Hub Platform and the Distributed Order Management (DOM) Platform. All applications are implemented in Java Spring Boot and hosted in the COSMOTE Kubernetes environment. One major addition in this year's projects and technologies was the introduction of the Camunda 8.0 BPM platform, used for the implementation of the Cosmote One (C1) project in the area of Order Management and considered a Target Architecture solution component in Cosmote.

    • Java
    • Spring Boot
    • Kubernetes
    • Camunda 8

2022

  1. 08/2022 – 03/2023

    OTEGreece

    New Premium Internet Access

    Premium Internet Access is a product that extends the OTE Business Product portfolio, providing a Symmetric Internet Solution.

    More detailsShow less

    Cognity delivers the Order to Bill and Fault to Repair solution, including Order Capture with Oracle Siebel CRM, Central Order Management, Service Order Management and Technical Order Management with the Oracle OSM platform, and service modeling with Oracle UIM. The solution conforms to the RSDOD architecture and integrates with existing OTE systems such as WFM Wrapper, Promitheas, NRI, ASAP and Super Repo through the SOA platform. It tackles the challenges of ordering a Business Product through the processes of the Residential products, without affecting their ordering or fulfillment.

    • Oracle Siebel CRM
    • Oracle OSM
    • Oracle UIM
    • SOA
  2. 07/2022 – 02/2023

    OTEGreece

    Integration & Order Management CRs 2022

    Implementation of new functionalities in Order Management and Integration systems to enable communication between BSS and OSS systems, for Order Management, Customer Management, Trouble Ticketing, Work Force Management, SAP, Collection and other areas.

    More detailsShow less

    The system is built on Oracle SOA Suite 12c, Oracle Communications Order and Service Management (OSM), WebLogic Integration (WLI) and Java EE.

    • Oracle SOA Suite 12c
    • Oracle OSM
    • WebLogic Integration (WLI)
    • Java EE

03Education

Education

  • September 2022 – April 2024

    M.Sc. in International Business and Management

    ALBA Graduate Business School, The American College of Greece

    Athens, Greece

    • Business Economics, Financial Accounting, Financial Management
    • Production & Operations, Marketing Management, Strategy Formulation
    • International Business, Digital Business Strategy
    • Strategy Formulation & Implementation, Negotiations
    • Career Development

    Grade3.15 / 4 GPA

  • October 2016 – July 2022

    B.Sc. in Computer Engineering and Informatics

    Department of Computer Engineering & Informatics, University of Patras

    Patras, Greece

    • Integrated Master

    Thesis

    Design and development of a simulation software system for modeling industrial production processes and implementation of performance improvement methods with real-time data.

    Grade7.5 / 10

04Certificates

Certificates & training

  • 07/2023

    Cybersecurity

    ACTA SA Spin Off Aristotle University of Thessaloniki

    Risk assessments, identifying potential vulnerabilities, implementing effective security measures to safeguard critical data and systems. Company's resilience against cyber threats, maintaining a secure and protected environment.

    80 hours

  • 06/2022

    DevSecOps Academy

    ReGeneration & Code.Hub

    Training program in DevSecOps Processes & Principles, Infrastructure & Configuration Management, Continuous Pipelines, Cloud Computing Building Blocks, AWS & Azure Basics, Identity & Access Management, High Availability and Scalability aspects, Storage Services & Databases, Security & Encryption, Networking, Containers & Orchestration, Monitoring.

    80+ hours

  • 04/2021

    Industrial IoT on Google Cloud Platform

    Coursera

    Industrial IoT, including its applications in manufacturing and business consideration for these technologies.

  • 04/2021

    Personal Development

    InterMediaKT

    Seminar about personal development and team spirit.

  • 05/2019

    Distributed Computing in Sensor Systems

    IEEE

    15th IEEE International Conference on Distributed Computing in Sensor Systems.

  • 10/2016

    Digital Marketing

    Google

    Basic principles of digital marketing and digital promotion.

05Languages

Languages

  • Greek

    Native
  • English

    C2
    • IELTS Overall Score: 6.5
    • LRN Level 3 Certificate in ESOL International (CEF C2)
    • City & Guilds Level 3 Certificate in ESOL International

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