Mario Halambek
Co-Founder at Calimero Network
Zagreb Metropolitan Area Croatia
Summary
🤩
Rockstar🎓
Top SchoolMario Halambek is a Co-Founder and site reliability engineer with 11 years of hands-on experience building and operating resilient infrastructure for crypto and consumer platforms. He blends deep DevOps and SRE expertise with C++ and backend development, contributing to high-profile open-source projects like NEAR Protocol by adding Prometheus instrumentation, error tracking, and state-dumping to Redis. Mario has repeatedly founded and scaled technical startups while also delivering production engineering at companies such as Deliveroo and Tolar HashNET, showing a knack for moving systems from prototype to reliable production. Based in Zagreb, he combines an engineer’s attention to observability and performance with entrepreneurial instincts for product-focused infrastructure.
11 years of coding experience
7 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at FER
Github Skills (9)
rust10
prometheus10
blockchain10
nearprotocol10
redis8
devops8
docker6
dockers6
webassembly4
Programming languages (8)
Github contributions (5)
near/nearcore
Aug 2020 - Mar 2022
Reference client for NEAR Protocol
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:6 releases, 24 reviews, 25 commits in 1 year 8 months
Contributions summary:Mario contributed to the NEAR Protocol's core client, focusing on performance monitoring and infrastructure enhancements. They implemented Prometheus metrics for RPC processing times and error tracking, adding instrumentation to key RPC methods. The user also refactored the codebase to improve existing metrics and added support for dumping state to Redis. Moreover, they made changes to the build and release scripts, specifically deprecating the 'near' client in favor of 'neard'.
rustethereumblockchainnearprotocolwebassembly
calimero-is-near/near-indexer-for-explorer
Jun 2022 - May 2023
Contributions:2 reviews, 7 pushes, 2 branches in 11 months
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