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Ognjen Ljuboja

@ognjenljuboja

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I build low-latency backend systems, distributed services, and blockchain products using Rust, Go, Python, and Node.js.

Serbia

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What I'm looking for

I'm looking to build scalable, low-latency backend and distributed systems, particularly around real-time data, blockchain integrations, cloud-native infrastructure, and production services.

At Dcentralab, I owned a Rust routing engine for a DeFi intent solver processing millions of dollars in user volume, designed its multi-service architecture, and built low-latency pipelines for real-time blockchain liquidity updates. I also migrated an AI trading agent runtime to Hermes and built a signing enclave that separated private key custody from the agent runtime.

Previously, I built cryptocurrency exchange integrations, automated trading systems, Web3 game APIs and smart contracts, and interoperable NFT marketplace features at Infinity Games. At Agile Software Design, I delivered real-time voting, e-commerce, and logistics applications with payment and OAuth integrations.

Experience

Work history, roles, and key accomplishments

Algorithm & Backend Engineer

Dcentralab

Oct 2025 - Jul 2026 (9 months)

Owned the core Rust routing engine for a DeFi intent solver, processing millions in user volume under strict latency constraints. Designed multi-service architecture and integrated third-party protocol APIs, with production monitoring via Prometheus and Grafana.

Rust Python Go AWS Prometheus Grafana Event Driven Architecture Distributed Systems API Integration Kubernetes fastAPI GKE

Software Engineer

Infinity Games

Apr 2024 - Oct 2025 (1 year 6 months)

Connected a cryptocurrency exchange platform to multiple exchange and wallet APIs, and developed an automated trading system with real-time WebSocket feeds. Also designed RESTful APIs and Solidity smart contracts for Web3 games, optimizing leaderboard performance.

DynamoDB Redis AWS Docker WebSockets REST APIs Solidity .NET MySQL Next.js React Express MongoDB IPFS S3

Software Engineer

Agile Software Design GmbH

Aug 2022 - Dec 2023 (1 year 4 months)

Built a real-time event voting platform with a weighted popularity algorithm and Spotify/Deezer integration. Delivered e-commerce and logistics-tracking systems, integrating payment processors and OAuth login.

React React Native MySQL OAuth Payment Integration