Java Backend Engineer (Web3)

TL;DR

Java Backend Engineer (Web3): Building backend infrastructure for on-chain payment integration to bridge banking rails and blockchain networks with an accent on wallet interactions and transaction processing. Focus on ensuring transaction reliability, idempotency, and fault tolerance across EVM-compatible chains.

Location: Remote (Asia)

Company

hirify.global is a leading global blockchain ecosystem and the world’s largest cryptocurrency exchange by trading volume and registered users.

What you will do

• Design and develop backend systems for on-chain payment flows, including wallet interactions, transaction broadcasting, and confirmation tracking.
• Integrate with EVM-compatible chains and other blockchain networks for on-chain fund settlement.
• Build APIs and services that connect banking channels with on-chain liquidity.
• Collaborate with P2P and Fiat teams on cross-system integrations.
• Ensure transaction reliability, idempotency, and fault tolerance across on-chain and off-chain systems.
• Monitor chain status and handle edge cases such as reorgs, gas spikes, and failed transactions.

Requirements

• 3–5 years of Java backend development experience.
• Experience with Web3/blockchain development: on-chain interactions, wallet integrations, and smart contract calls.
• Familiarity with EVM chains (Ethereum, BSC, etc.) or other L1/L2 ecosystems.
• Proficiency in Spring Boot and common distributed system components.
• English: Fluent (C1) required to coordinate with overseas partners and stakeholders.
• Location: Must be based in Asia.

Nice to have

• Experience in fintech or crypto payment systems.

Culture & Benefits

• Opportunity to shape the future within the world’s leading blockchain ecosystem.
• Collaboration with world-class talent in a user-centric global organization with a flat structure.
• Autonomy to tackle unique, fast-paced projects in an innovative environment.
• Results-driven workplace with opportunities for career growth and continuous learning.
• Competitive salary and company benefits.
• Work-from-home arrangement.