Ljubiša Isaković
Senior Software Engineer at Calimero Network
Belgrade, Central Serbia
Summary
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Rockstar🎓
Top SchoolLjubiša Isaković is a Senior Software Engineer based in Belgrade with a focused track record in backend systems, DevOps and distributed storage over roughly 4 years in senior roles and longer hands-on development experience. He has driven robustness and testing improvements for Avail’s core infrastructure—adding fuzzing harnesses and CI-focused tooling—and optimized IPFS-backed storage logic to improve resilience and DHT record management. Ljubiša has moved between startups and protocol teams (Polygon Labs, Avail, Calimero Network), blending low-level reliability work with deployment automation and performance-minded refactors. Colleagues would describe him as a pragmatic engineer who prioritizes testability and infrastructure hygiene as first-class features. His background from the University of Belgrade and steady progression through engineering and team-lead roles signal both technical depth and growing leadership. Notably, he often extracts and modularizes components (e.g., kate-rpc) to make codebases more maintainable and testable.
4 years of coding experience
10 years of employment as a software developer
Bachelor’s Degree, Electrical Engineering and Computer Science, Bachelor’s Degree, Electrical Engineering and Computer Science at University of Belgrade School of Electrical Engineering
Stackoverflow
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0reached
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Github Skills (12)
testing10
fuzzing10
distributed-systems10
ipfs10
rust10
dht10
afl-fuzz10
cicd9
error-handling9
data-structures8
data-structure8
blockchain7
Programming languages (6)
Github contributions (5)
availproject/avail-light
May 2022 - Dec 2022
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 releases, 354 reviews, 30 commits in 6 months
Contributions summary:Ljubiša's commits primarily focus on modifying the core logic of the `avail-light` project, which involves working with IPFS. Their contributions include moving and refactoring IPFS client creation and cell storage logic to enhance performance. Additionally, they implemented error handling and added support for storing and retrieving cell data within the IPFS network, which improved the system's resilience. Further, the user integrated the time-to-live (TTL) feature, improving DHT records' management.
availproject/avail
Mar 2022 - Apr 2022
Role in this project:Backend & DevOps Engineer
Backend & DevOps EngineerContributions:33 reviews, 6 commits, 8 PRs in 1 month
Contributions summary:Ljubiša primarily focused on enhancing the project's testing capabilities and infrastructure. Their contributions include adding a simple build_commitments test and integrating fuzzing harnesses for build_commitment and build_proof functions. Furthermore, the user established a deployment script for AFL fuzzing and extracted the kate-rpc component into a separate crate. These changes indicate a focus on improving code quality and testing infrastructure.
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