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Hi, I’m Hrvoje Henry Tonkovac, a Site Reliability Engineer based in Amsterdam with 7+ years of experience scaling infrastructure, reducing cloud spend, embedding observability, and automating operations across AWS and Azure. I thrive on building reliable platforms, driving cost efficiency, and enabling teams through automation and self-service tooling. My work at Booking.com, AXA, and Glooko demonstrates a track record of improving reliability, cutting costs, and delivering measurable impact.…Hi, I’m Hrvoje Henry Tonkovac, a Site Reliability Engineer based in Amsterdam with 7+ years of experience scaling infrastructure, reducing cloud spend, embedding observability, and automating operations across AWS and Azure. I thrive on building reliable platforms, driving cost efficiency, and enabling teams through automation and self-service tooling. My work at Booking.com, AXA, and Glooko demonstrates a track record of improving reliability, cutting costs, and delivering measurable impact.

Hrvoje Henry Tonkovac

DevOps Developer, Back-End Developer, Cloud Developer

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Hi, I’m Hrvoje Henry Tonkovac, a Site Reliability Engineer based in Amsterdam with 7+ years of experience scaling infrastructure, reducing cloud spend, embedding observability, and automating operations across AWS and Azure. I thrive on building reliable platforms, driving cost efficiency, and enabling teams through automation and self-service tooling. My work at Booking.com, AXA, and Glooko demonstrates a track record of improving reliability, cutting costs, and delivering measurable impact.…Hi, I’m Hrvoje Henry Tonkovac, a Site Reliability Engineer based in Amsterdam with 7+ years of experience scaling infrastructure, reducing cloud spend, embedding observability, and automating operations across AWS and Azure. I thrive on building reliable platforms, driving cost efficiency, and enabling teams through automation and self-service tooling. My work at Booking.com, AXA, and Glooko demonstrates a track record of improving reliability, cutting costs, and delivering measurable impact.

Available to hire

Hi, I’m Hrvoje Henry Tonkovac, a Site Reliability Engineer based in Amsterdam with 7+ years of experience scaling infrastructure, reducing cloud spend, embedding observability, and automating operations across AWS and Azure. I thrive on building reliable platforms, driving cost efficiency, and enabling teams through automation and self-service tooling. My work at Booking.com, AXA, and Glooko demonstrates a track record of improving reliability, cutting costs, and delivering measurable impact.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Croatian

Fluent

Work Experience

Site Reliability Engineer at Booking.com

March 1, 2023 - Present

Migrated 200+ MySQL clusters to AWS EC2 and enhanced the in-house Python Django API for cluster management, migrating over 1000 servers from on-prem to AWS EC2. Built and deployed an AI-powered Slackbot for 2,500+ developers to answer MySQL questions using a RAG pipeline and MCP server, with an evaluation framework achieving ~70% real-world accuracy. Achieved >$4M in annual AWS cost savings by right-sizing 600+ EC2 instances without compromising reliability. Reduced engineering time by 80 hours per quarter and optimized CI/CD by rethinking software testing strategy. Improved per-cluster observability, isolated cluster faults to prevent full-job failures, and increased fleet-wide MySQL query latency by 30% via automated disk-striping. Defined and tracked an SLI for unplanned database failovers using OTEL.

Platform Engineer at AXA

August 1, 2020 - March 1, 2023

Implemented a multi-regional Zero-trust Azure landing zone with central Layer 4 Firewall, cross-region routing, multiple Web Application Firewalls, a conditional DNS forwarder, and a zoned network design. Developed 50+ Terraform modules accessible through a self-service developer portal, enabling 12+ customer teams and 600+ resource deployments. Identified and fixed a critical IAM design flaw blocking cloud adoption through the cloud portal and co-led the design to unblock 10+ teams. Led modernization of legacy automation Go tooling, improving code maintainability and reducing the memory footprint of hourly jobs by over 90%. Built a DNS solution with dnsmasq for cross-cloud/on-prem resolution supporting 100+ apps.

DevOps Engineer at Glooko (via CodeCons)

September 1, 2019 - September 1, 2020

Upgraded a multi-terabyte MySQL database from 5.5 to 5.7 to ensure high availability and minimize downtime; enhanced the backup system with physical backups, reducing MTTR by two weeks. Designed and implemented a comprehensive ETL infrastructure enabling real-time anonymization of customer data and seamless integration into a data warehouse, with CI/CD and IaC ensuring environment parity. Optimized AWS costs organization-wide by analyzing bills, leveraging reserved instances, and eliminating redundant infrastructure, achieving over 30% cost reductions. Deployed a highly available and observable AWS infrastructure to support six microservices using AWS ECS and MongoDB.

Back End Developer at UHP Digital d.o.o. & ReRoot d.o.o

February 1, 2017 - January 31, 2019

Built and deployed full-stack web apps as a PHP developer. Developed containerized Node.js (TypeScript) microservices on AWS with GitLab CI/CD. Onboarded interns and junior developers, contributing to team scaling and knowledge sharing.