Ai Web3 Backend Engineer

TL;DR

Ai Web3 Backend Engineer (Web3): Design and build the backend infrastructure for an AI agent marketplace enabling multi-agent workflows and secure on-chain fund management with an accent on DeFi protocols, agentic architectures, and smart contract engineering. Focus on architecting scalable backend systems, integrating next-gen agent-to-agent protocols, and ensuring security and decentralization in AI-native Web3 applications.

Location: Belgrade, Warsaw, UK, Barcelona - Remote or Hybrid

Company

hirify.global is a pioneering Web3 and blockchain product company focused on decentralized ecosystems and innovative blockchain-based solutions since 2017.

What you will do

• Architect and implement the AI Agent Marketplace backend and deployment infrastructure.
• Build and maintain multi-agent workflows including utility, solver, and settlement agents.
• Integrate MCP servers, A2A protocols, and on-chain execution environments.
• Develop secure agent deployment principles such as sandboxing and containerization.
• Implement DeFi trading strategies through on-chain agent logic and Web3 integrations.
• Collaborate with researchers, smart contract engineers, and AI experts to shape AI-on-chain standards.

Requirements

• Must have strong backend engineering expertise in distributed systems design and deployment.
• Experience with Web3 development including smart contracts in Solidity or Rust and DeFi protocol integrations.
• Familiarity with agentic architectures, multi-agent systems, MCP servers, and A2A protocols.
• Knowledge of deployment architectures like Docker, Kubernetes, and secure containerization.
• Understanding of cryptography and verification systems such as zk proofs and TLS notarization.
• Ability to reason about security, decentralization, and performance tradeoffs.
• Bonus: familiarity with RAG pipelines or AI-enhanced decision-making.

Culture & Benefits

• Opportunity to build foundational infrastructure for the AI x Web3 ecosystem.
• Work on cutting-edge multi-agent frameworks and verification systems.
• Highly collaborative environment with engineers, researchers, and builders.
• Remote-first culture with flexible collaboration options.