Mario Kozjak
Senior DevOps Engineer at Elpheria
Zagreb, Croatia
Summary
👤
Senior🎓
Top SchoolMario Kozjak is a Senior DevOps Engineer and founder with 12+ years building cloud-native platforms, currently leading DevOps at Elpheria and contributing to Bramble via X-Team. He designs and implements end-to-end infrastructure—Terraform, AWS, CI/CD, containerization and serverless—having bootstrapped an IoT SaaS product (EdgeBind) from MVP to production. A hands-on polyglot, he pairs backend engineering in Go, Node.js and Python with infra automation and IAM/security design to deliver scalable, multi-tenant systems. Past roles include architecting high-throughput IPTV and media delivery systems, and building in-house CD and observability solutions for enterprise customers. Active in open source, he has improved JSON-RPC over WebSocket server behavior and browser support, showing attention to protocol robustness and client interoperability. Outside tech he’s also a trained MSc in railway traffic optimization and a music composer and guitarist, blending analytical rigor with creative pursuits.
12 years of coding experience
8 years of employment as a software developer
Polytechnic School ViroviticaMaster of Science, Software modeled and simulated Railway Traffic Optimizations on the R201 line section (Croatia), Master of Science, Software modeled and simulated Railway Traffic Optimizations on the R201 line section (Croatia) at Faculty of Traffic Engineering
English, Croatian
Stackoverflow
1reputation
0reached
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Github Skills (11)
json-rpc10
nodejs10
rpc-server10
rpc10
websocket10
back-end-development10
rpc-library10
grpc10
typescript-types9
typescript9
typescripts9
Programming languages (27)
Github contributions (5)
elpheria/rpc-websockets
Oct 2016 - Jan 2023
Role in this project:
Back-end Developer
Back-end DeveloperContributions:34 releases, 14 reviews, 371 commits in 6 years 4 months
Contributions summary:Mario primarily focused on implementing and refining core backend functionality. Their contributions involved fixing typos and style issues, and enhancing the server-side capabilities by adding support for subscribing to events, adding features like RPC method protection, and allowing for custom socket identification. Furthermore, the user refactored existing code, by switching to browser support and updating the underlying WebSocket library used.
gcprpcserverlessawsedge-computing
mkozjak/gorecord
Nov 2014 - Jan 2017
Contributions:42 commits, 1 PR, 27 pushes in 2 years 2 months
golangstreamingmedia-streamingrecordermedia-recorder
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