The Engineer Behind
The Systems
Hello, I'm Vanja Sretenović — a backend and systems engineer from Čačak, Serbia. I work on blockchain infrastructure at Inery (consensus, IneryDB indexing, EOSIO-style and decentralized databases, cluster operations, Node.js and C++ services) and on the EIK Race Management platform at Eik Europe — Laravel, C# / .NET, RFID, and byte-level embedded framing.
Previously I co-founded StepUpSave (well-being / blockchain startup): Linux clusters, C++ smart contracts, and mentoring under Rising Starts. My independent work includes the Flatpack C++ stack, compiler-style tooling, and race-platform delivery.
I hold a B.Sc. in Information Technologies (GPA 9.42/10) from the Faculty of Technical Sciences, University of Kragujevac, with a Master’s in progress. Awards include the Dositej Obradović scholarship (among Serbia’s top 100 students) and the Vuk Karadžić diploma.
I've spoken at Jahorina Tech and Tomorrow Conference, competed at FON Hackathon, and participated in the Republic of Serbia Programming Competition (2017, 2018). Outside of engineering I recharge through photography and continuous learning.
"The only way to do great work is to love what you do."
Technical Arsenal
Core languages
Systems & tooling
Cloud & data
Web stack
Embedded & integration
Security & crypto
AI & product
Game dev
Experience
Backend and blockchain engineer
Inery Blockchain
Consensus and validation: contributed to consensus design; implemented validator pooling in groups of 11 to balance latency, security, and consistency. IneryDB indexing: 64-bit index types with characters packed at 5 bits per character (up to 12 characters per key) for compact, fast lookups. Data stack: EOSIO and Inery decentralized databases; Redis; MongoDB; PostgreSQL; MySQL. Linux and networking: server DevOps; TCP/UDP socket services; Bash and Python automation on Linux hosts. Cluster build and deploy: Bash and Python scripting to build, deploy, and operate blockchain node clusters. IneryDBMS: Node.js backend between the IneryDB DLS (decentralized ledger system) and the GUI client — plus broader C++ core and tooling.
Full-stack engineer with embedded RFID integration
Eik Europe DOO
EIK Race Management platform: Laravel backend for the web application; C# / .NET for RFID readers, timing, and embedded integration with byte-level framing (see selected projects).
Co-founder and technical lead
StepUpSave
Startup on the theme of well-being: backend ecosystem for a blockchain-powered well-being app; custom Linux server setup and multi-node cluster; developed C++ smart contracts. Mentored under Rising Starts; owned the path from prototype through early operations.
Intern — mobile applications
ICraft
Čačak; C and C++ for mobile applications; learned data structures and algorithms in both languages.
Education
M.Sc. Software Engineering
Faculty of Technical Sciences, University of Kragujevac
Master’s programme in software engineering (ongoing).
B.Sc. Information Technologies
Faculty of Technical Sciences, University of Kragujevac
Undergraduate degree focused on software engineering, systems, and applied computing.
Information Technologies
Secondary Technical School Čačak
Secondary technical education in IT.
Awards
Dositej Obradović scholarship and diploma
Among the best 100 students in Serbia.
Vuk Karadžić diploma
National secondary-school diploma with distinction.
Events & Hackathons
FON Hackathon
2023Belgrade
Blockchain / well-being project.
Tomorrow Conference — workshop speaker
2023Decentralized databases
Workshop on decentralized databases.
Jahorina Tech Conference
2024Speaker
Presented a decentralized database solution.
Republic of Serbia Programming Competition
2017, 2018Belgrade
National programming competition.