Davíð Guðni Halldórsson

Frisbii is a subscription management and recurring billing platform.

• Migrated around 100 repositories/services from self-hosted Bamboo to GitHub Actions using reusable workflows and OIDC, reducing maintenance burden and standardizing deployments across several teams.
• Designed and developed a Python CLI tool to centralize infrastructure scripts, developer workflows, and CI/CD processes.
• Built an AI-powered workflow using Claude agents to process Jira tasks and generate fully implemented pull requests.
• Designed the AWS network architecture and implemented DNS whitelisting capabilities using AWS Network Firewall.
• Improved and simplified infrastructure as code by migrating from CloudFormation to Terraform.
• Implemented infrastructure controls for PCI/SOC 2, including [IAM/access logging/encryption/network controls/change tracking/evidence collection], supporting successful audit readiness.
• Improved deployment reliablity and removed the need for patching by migrating our ECS services from EC2 instances to Fargate.
• Improved replication lag, failover times, blue/green deployment duration, and cost efficiency by migrating RDS databases from MySQL to Aurora MySQL.
• Implemented an mTLS proxy with API Gateway and Lambda based on requirements from a payment provider.
• Maintained and worked with Grafana and Prometheus for monitoring application metrics.
• Managed, onboarded, and mentored DevOps teammates.

Andes is a cloud consulting company that exclusively uses AWS.

• Set up AWS infrastructure for a dating app company using CloudFront, S3, ECS, Lambda, and RDS, configured CI/CD in GitHub Actions, and dockerized the application.
• Migrated the dating app company's existing database and document storage in AWS.
• Set up AWS infrastructure for a public sector company using CloudFront, S3, Lambda, EventBridge, CodeDeploy, ECS, and RDS.
• Worked in a DevOps team at Digital Iceland, setting up code coverage tools, improving CI and developer experience, and vetting new web services with extensive load testing.

Vice Versa is a software company that I started.

• Won first place in a tender for a two-year contract for a full development team.
• Developed Loftbrú, a project for giving people living in the countryside a discount on domestic flights.
• Developed Ferðagjöf, a COVID-era project for giving every person in Iceland a small amount of money to spend on travel industry services of their choice.

Tempo has multiple products, currently available as plugins in the Jira and Zendesk ecosystems.

• Implemented major refactoring changes across products in the UI and REST APIs for the GDPR initiative.
• Implemented autoscaling for the Kubernetes cluster.
• Migrated a live microservice from Heroku to the AWS infrastructure with only a couple of minutes of downtime.
• Set up Tempo's integration with the feature flagging service LaunchDarkly.
• Implemented a command line tool to spin up a containerized environment for the server product.
• Joined the on-call team in early 2019 to handle incidents during off hours.
• Worked on authentication changes in the core product, new microservices, and end-to-end test setup.

Integrated a new student management system and learning management system, connecting core institutional workflows across platforms.

Supported courses in programming, data structures, and compilers across multiple semesters.