Konstantinos Douloudis
Wien
Summary
I'm a DevOps engineer with experience building web applications in Java and deploying them to the cloud. Searching for a role that will let me evolve my skillset while challenging my problem-solving ability.
Overview
8
8
years of professional experience
Work History
DevOps Engineer
World Data Lab
04.2023 - 06.2025
- Enhanced security and cost-efficiency of WDL's AWS infrastructure.
- Oversaw Kubernetes cluster operations on AWS EKS to optimize deployment workflows.
- Designed and maintained infrastructure as code using Terraform, ensuring consistent environment provisioning across multiple projects.
- Led implementation of CI/CD pipelines to streamline deployment processes and enhance software delivery speed.
- Automated monitoring and alerting systems to improve incident response time and system reliability.
- Evaluated new tools and technologies, driving strategic decisions that improved operational efficiency and reduced technical debt.
DevOps Engineer
Flexfin
04.2022 - 04.2023
- Optimized Flexfin's cloud environment through strategic infrastructure improvements.
- Managed automation scripts using Python, PowerShell, and Bash.
- Advanced web application feature set through Java, Kotlin, and Spring Boot.
- Streamlined CI/CD pipelines, enhancing deployment speed and reliability across applications.
- Implemented infrastructure as code (IaC) using Terraform, improving system provisioning efficiency.
- Optimized container orchestration with Kubernetes, increasing resource utilization and scalability of applications.
- Automated manual tasks through scripting languages such as Python or Shell, boosting team productivity levels.
DevOps/Software Engineer
OpenPEPPOL
05.2021 - 03.2022
- Developed and launched web applications with Java, Ruby, Spring Boot, Docker, and AWS technologies.
- Developed and maintained scalable software solutions to enhance digital document exchange.
- Collaborated with cross-functional teams to define technical requirements and optimize project outcomes.
- Designed and executed integration strategies for various e-invoicing systems within the PEPPOL network.
Software Engineer
University of Piraeus Research Center
06.2017 - 12.2021
- Developed and deployed Greek ESPD Service on Microsoft Azure using Java technologies.
- Streamlined deployment workflows by implementing robust CI/CD pipelines with Jenkins, GitHub Actions, Travis, and Docker.
- Utilized Ansible and Vagrant for Linux VM cluster maintenance.
- Collaborated with multidisciplinary teams to define project requirements and deliver innovative solutions.
- Developed software applications to enhance research capabilities and streamline data processing workflows.
- Mentored junior engineers in coding standards, debugging techniques, and testing methodologies.
- Led integration of new technologies into existing infrastructure, improving overall system functionality.
- Implemented best practices for software development lifecycle, ensuring high code quality and maintainability.
Education
Master of Science - Information Systems & Services
University of Piraeus
Piraeus, Greece01.2019
Bachelor of Science - Digital Systems
University of Piraeus
Piraeus, Greece01.2017
Skills
- Efficient Time Management
- Taking Initiatives and Making Decisions
- Organizational
- Reliable
- Responsible
- Analytical
- Infrastructure automation
- Linux operating system
Publications
- Employing the Once-Only Principle in the domain of the electronic public procurement, M. Siapera, K. Douloudis, G. Dimitriou, A. Prentza, Information Systems, EMCIS 2019, Lecture Notes in Business Information Processing (LNBIP), M. Themistocleous, M. Papadaki (Eds.), Springer, Cham, Vol. 381, pp. 236-246, 2020.
- Application of Automated Trust Verification and Delegation Mechanisms in PEPPOL eProcurement network, K. Douloudis, M. Siapera, G. Dimitriou, A. Prentza, Information Systems, EMCIS 2019, Lecture Notes in Business Information Processing (LNBIP), M. Themistocleous, M. Papadaki (Eds.), Springer, Cham, Vol. 381, pp. 448-457, 2020.
- A Common Data Model for Once-Only Cross-Border Data Exchanges in Europe, M. Siapera, K. Douloudis, G. Dimitriou, A. Prentza, Proceedings of the 14th International Conference on Theory and Practice of Electronic Governance (ICEGOV 2021), Athens, Greece, 10/06/21 - 10/08/21
- Improving Electronic Public Procurement Using the Once-Only Principle, K. Douloudis, M. Siapera, A. Prentza, Proceedings of the 14th International Conference on Theory and Practice of Electronic Governance (ICEGOV 2021), Athens, Greece, 10/06/21 - 10/08/21
Timeline
DevOps Engineer
World Data Lab
04.2023 - 06.2025
DevOps Engineer
Flexfin
04.2022 - 04.2023
DevOps/Software Engineer
OpenPEPPOL
05.2021 - 03.2022
Software Engineer
University of Piraeus Research Center
06.2017 - 12.2021
Master of Science - Information Systems & Services
University of Piraeus
Bachelor of Science - Digital Systems
University of Piraeus