ANDREW KOIDAN

• Email: [email protected]
• Stackoverflow: deathangel908
• Github: akoidan
• LinkedIn: akoidan
• Blog: blog.akoidan.com
• Location: Rijeka/Croatia

SUMMARY

• Principal Engineer with 10+ years across Web, Mobile, Backend.

• Deep expertise in DevOps (GCP/AWS/CF, Kubernetes, CI/CD).

• Strong in Java, Python, Go, JavaScript, TypeScript.

• Specialist Degree in System Programming at CNTU, 2009-2014.

PROFESSIONAL BACKGROUND

Head of Division at Significo Sep’23 - Sep’25

• Led the division, driving the strategic direction and technical excellence across six concurrent projects, including AI solutions.
• Streamlined DevOps infrastructure, reducing build times by 50% and improving deployment reliability and code readability.
• Enhanced security and achieved medical device certification.
• Delivered hands-on leadership and built critical system components beyond senior-engineer complexity.
• Led internal engineering conferences with 20–30 participants and mentored teams across the organization.

Team Lead at Vertrical May’21 - May’23

• Built and scaled a large e-commerce platform using Gatsby, backed by microservices on Kubernetes and NestJS, serving up to 50k TPS.
• Automated infrastructure with ArgoCD, CircleCI, Netlify, and Helm.
• Led a team of 7 people and built a product using Go, Vue, Cypress, and React Native, accelerating feature delivery and maintainability.
• Mentored engineers and coordinated cross-functional teams, improving delivery efficiency and code quality.

Earlier Engineering Experience Dec’13 - May’21

• Delivered 30+ production systems across web, backend, and mobile.
• Developed backend systems using Python (DRF, Flask), Java (Spring), Go, Node (NextJS), Kotlin.
• Built web SR/SPA/Static applications on React, Vue, TypeScript, Redux, Vite, Webpack, GraphQL, Cypress, Playwright, Gatsby.
• Delivered mobile applications using React Native, Java, Kotlin, including native Android, hybrid iOS/Android, and Android TV.
• Built and migrated production systems to event-driven microservices, improving scalability, maintainability, and velocity.
• Designed and automated CI/CD pipelines, and managed AWS/GCP infrastructure using Pulumi, Terraform, Docker, and Kubernetes.
• Handled PostgreSQL, Cassandra, MongoDB, Neo4j, RabbitMQ, Redis, Elasticsearch, MySQL, Pinecone databases in high-traffic systems.
• Built a decentralized P2P crypto marketplace Kitzen for Tron, Ethereum, and Bitcoin networks.
• Created open-source projects lines-logger, WebRTC pychat, spainter, http-remote-pc-control, hotkey-hub, stream-alert.