Payment R&D Engineer (A42299), Singapore

Core Value of the Role
You will be responsible for the technical integration and optimization of payment channels in the Thai market, building a highly available and resilient cross-border payment system. This role directly supports top retail, e-commerce, and O2O clients, covering both online and offline payment scenarios. Responsibilities Take new retail as an example, design and deliver integrated online/offline acquiring solutions, with deep familiarity in mainstream offline acquiring methods such as POS acquiring and QR code acquiring. Maintain strong communication with local new retail clients to understand industry needs; ensure effective information sharing internally and provide technical support for integration. Lead the technical integration and testing of Thai payment channels (e.g., PromptPay, QR Payment, local cards, international cards, e-wallets such as TrueMoney, LinePay, ShopeePay, PaotangPay), ensuring delivery according to business timelines. Monitor payment flow stability, troubleshoot issues (such as channel outages, performance bottlenecks, customer complaints), and coordinate optimization between channel partners and internal teams. Engage regularly with local merchants and payment providers, offering technical support to ensure smooth project delivery. Act as a key R&D contributor, independently driving cross-functional collaboration to ensure timely rollout of pilot projects. Requirements Bachelor's degree or above in Computer Science or related field. 1–3 years of hands-on development experience in payment systems (payment gateway/acquiring platform/channel gateway), familiar with offline acquiring (POS, QR) and core payment flows (sign-up, payment, clearing, reconciliation). Proven experience in channel integration; strong risk awareness; familiarity with fault tolerance, idempotency, and data consistency in distributed systems. Proficient in Java (high-concurrency and distributed system design); hands-on Golang experience is a plus. Familiar with RocketMQ, Redis, and database sharding & partitioning. Proficient in Thai and Chinese communication; ability to collaborate with headquarters in Chinese is preferred. Preferred Qualifications Deep understanding of integrated online/offline acquiring solutions in the new retail industry, with hands-on knowledge of mainstream offline acquiring methods. Direct experience integrating with local e-wallets (TrueMoney, LinePay, ShopeePay, PaotangPay). Previous work experience in cross-border payment companies. Experience in payment stability improvement or fraud/loss prevention projects. What We Offer Opportunity to deeply participate in shaping Thailand's payment ecosystem, with significant technical decision-making space. Collaboration with the Shanghai headquarters technology team to gain hands-on experience in cross-border system architecture. Direct involvement in real business scenarios with top retail and O2O clients.
O2O
/POS
PromptPayQR Payment TrueMoneyLinePayShopeePayPaotangPay
Pilot
1-3//POS
Java Golang RocketMQRedis /
/ TrueMoneyLinePayShopeePayPaotangPay
/O2O