Spyros Papageorgiou Email & Phone Number

Fribourg

Working on the DNS provisioning platform for the Root DNS Zone.

Switzerland

Working as a Backend Software Engineer on various mission critical platforms used to control the whole accelerator complex at CERN.Position:- Work in a team with 4 other senior software engineers- Maintain the existing systems and ensure constant up-time- Design and develop new features- Work with clients/operators to gather requirements- Provide Tier-3 support- Supervised intern that joined our teamAccomplishments:- Reduce needed configuration for setting up parameter relations by half using Neo4J and graph theory algorithms- Introduce code generation to the project, reducing development time.- Introduction of centralized logging & API usage monitoring using FileBeat, ElasticSearch, Kibana making future API tracking match more streamlined- Lead the study for migration of existing API to REST or gRPC to further increase our clients- Migrate the whole team & external contributors to using Git- Modernize the teams continuous integration pipeline using Git, Jenkins Pipelines and builds per branch.- Automate deployments & provisioning using AnsibleThe project architecture involves a central server API, deployed in multiples and load balanced on the client side. Also, messaging is used through JMS/ActiveMQ/ZeroMQ to communicate with accelerator devices and client applications.Technical Environment: Java 8, Spring (Core, Web, Data, Hibernate), Oracle SQL, Liquibase, JMS/ActiveMQ/ZeroMQ, Grafana, Prometheus, AlertManager, Kibana, ElasticSearch, Filebeat, Gradle, Swagger, OpenAPI, REST, JIRA, FishEye, Crusible, Bamboo, Jenkins, GitLab, Sonar, Git, SVN, Linux, IntelliJ, OpenStack, Docker

Greece

Full-Stack Software Engineer / Telecom (SMS, VOIP)Worked as a full stack Software Engineer developing a new distributed telecom platform and API, routee.net, that manages the creation and execution of large multimedia campaigns (SMS, VOIP, 2Step) while being part of 10 person team. My position:- Design and development of back-end and front-end features- Leading a small team of 3-4 people responsible for the integration of VOIP technologies in the platform. Gathering requirements, choosing technologies, creation and assignment of tasks.- Lower the execution time of million sized campaigns to linear by tuning DB interactions- Lead the integration with existing back-end SMS gateway- Set up log aggregation and monitoring for the platform using Greylog + Logstash- Take part in agile software development using Scrum with sprints of 1 to 2 weeks.- Usage JIRA for task management, BitBucket and GitLab for extensive code reviews, collaboration with a QA team to ensure product quality.- Take part in extensive code reviews- Write Ansible provisioning for the production environmentThe application architecture involved a central user facing REST API with a corresponding web site and multiple distributed micro-services for managing the platform. Technical Environment: Java 8, Spring (Core, Web, Data, Security), REST, OAuth MongoDB, MySql, Flyway, ElasticSearch, RabbitMQ, Apache Camel, Typescript, Angular, C, C++, Greylog, Logstash, SMPP, Kannel, Ansible, Jenkings, Git, Maven, Webpack, NPM, VOIP, Freeswitch