Stablecoin Settlement & Secure Ledger Backend Engineer — Singapore

Overview

Engineer backend infrastructure for tokenized-currency payment flows, including blockchain key handling, transaction signing, transfers, minting, burning, reconciliation and real-time conversions. Integrate new blockchain services into existing FX and payment systems with auditability, operational reliability and robust private-key protections.

Requirements

• At least five years of production software engineering with object-oriented architecture experience.
• Strong proficiency in a strongly typed language such as Kotlin, Java, C#, C++ or Rust; Python alone is insufficient.
• Proven experience building wallet, transaction flow or key management blockchain infrastructure integrated into financial systems.
• Secure design of encryption, private-key handling, signing and production operational controls.
• Ability to integrate new blockchain services into mature distributed systems safely without regressions.
• Strong cross-functional collaboration and readiness to learn new tools.
• Experience in FX, payments or financial infrastructure is advantageous, not required.

Responsibilities

• Design and operate secure private-key, transaction-signing and gas-fee infrastructure.
• Implement stablecoin mint, burn, transfer and settlement services.
• Create internal ledger services tracking balances across chains and token classes.
• Integrate fiat FX flows with stablecoin conversion and payment processing.
• Build testing and resilience controls around blockchain and legacy system boundaries.
• Partner with product, treasury, infrastructure and compliance teams to ship auditable production services.

Conditions

• Full-time on-site position in Singapore, with five days per week working from the office.

Tech stack

• Kotlin
• Java
• Rust