Verified Expert in Engineering
Athanasios has worked in many capacities including Python developer, DevOps, and site reliability engineer (SRE) for both startups and large organizations. Recently, he's served as an SRE at Government Digital Service—where he managed and scaled the infrastructure of GOV.UK Notify and helped to build common tools and services that are used by many teams within the organization.
Git, Python, Go, Bash, Linux, Vim Text Editor
The most amazing...
...thing I've done was to improve the scalability of the GOV.UK Notify application by enabling them to predict traffic surges.
Senior Site Reliability Engineer
Government Digital Service
- Managed and scaled the infrastructure of GOV.UK Notify, allowing them to handle 60x more traffic.
- Developed and maintained the autoscaling solution for GOV.UK Notify which allowed them to scale proactively.
- Organized and ran Game Days for GOV.UK Notify to build the team's confidence in supporting the infrastructure.
- Collaborated with other SREs across to migrate GOV.UK Verify to a modern, cloud-based platform reducing costs by a factor of 6x.
- Discovered and fixed bottlenecks in the code, reducing the runtime of the test suite by 40%.
- Collaborated closely with the Android and iOS developers to design and implement new APIs.
- Created and maintained Jira boards for back-end and front-end teams.
- Designed, prototyped, and developed a system that allowed developers to ship code from cloud-based CI systems to the on-premises platform.
- Upgraded from Red Hat 5 to Red Hat 6 all the on-premises servers across four environments.
- Upgraded a large on-premises Confluence installation from 3.4.9 to 5.5.6.
- Implemented a search functionality from scratch, writing both the front-end and back-end code and introducing Elasticsearch to the company.
- Designed the search functionality's architecture, including indexes, documents to be searched for, and index updates.
- Increased test coverage of the code and improved deployment reliability.
GOV.UK Notify Autoscalerhttps://github.com/alphagov/notifications-paas-autoscaler/
Python, Bash, Go
Terraform, Git, Jenkins, Concourse CI, Kibana, Vim Text Editor
Continuous Delivery (CD)
Docker, Linux, Amazon Web Services (AWS)
Scaling, System Design, Prometheus, RHEL, Cloud Foundry
Django, Knockout (Knockout.js)
Elasticsearch, Neo4j, Redis
Bachelor's Degree in Informatics and Communications
Technological Educational Institute (TEI) of Central Macedonia - Greece
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