Software Engineer – API Integration & AI Automation

Software Engineer (API Integration & AI Orchestration)

About the Role

Our client is a licensed digital payment solutions provider regulated by the Monetary Authority of Singapore (MAS), operating in the fast-growing digital asset and cross-border payments space. Working under a platform-driven model, the company delivers an integrated suite of services encompassing over-the-counter transactions, fiat payments, digital asset custody, and prime brokerage to business clients.

This is an exciting opportunity to join a regulated fintech at the intersection of financial infrastructure and AI innovation, where your work will directly shape the reliability and intelligence of high-volume transaction flows across banks, exchanges, and payment networks.

Key Responsibilities

• Design, develop, and maintain integrations with external financial platforms, including banks, exchanges, and payment service providers, by building reusable API connector frameworks and middleware components that support scalable partner onboarding

• Develop and maintain RESTful APIs , webhook handlers, callback processing pipelines, and integration services with robust error handling

• Implement secure API authentication and communication protocols, including OAuth2, JWT, HMAC, and RSA signature verification, to ensure safe and compliant connectivity

• Build intelligent smart routing and orchestration logic for payment and fund movement across multiple channels, incorporating factors such as API health, latency, success rates, cost optimisation, and liquidity availability

• Implement retry, failover, fallback, and resiliency mechanisms across partner channels to maintain high availability in production environments

• Support development and integration of AI-driven workflows for API monitoring, intelligent alerting, failure analysis, smart channel recommendations, and operational automation, including participation in Generative AI and Agentic AI initiatives

• Maintain API gateway capabilities covering authentication, access control, traffic management, rate limiting, logging, and observability, while building monitoring dashboards for transaction visibility and external API health

• Collaborate closely with Product, Operations, Compliance, Infrastructure teams, and external vendors to support integration onboarding, certification processes, and production rollouts

Requirements

• At least 3 years of software engineering or backend development experience, with strong hands-on proficiency in REST API design, webhook integrations, API troubleshooting, and distributed systems integration

• Solid backend development skills in one or more of the following: Java/Spring Boot, Node.js, or Python, with good understanding of API gateway, routing, orchestration, or middleware concepts

• Familiarity with API authentication and security mechanisms including OAuth2, JWT, API keys, HMAC, and RSA signatures, alongside working knowledge of SQL databases, logging, and monitoring tools

• Experience in fintech, payments, banking, or other regulated industries, with an understanding of payment transaction flows, routing, reconciliation, or treasury movement (is a bonus)

• Exposure to Generative AI or Agentic AI technologies, LLM platforms and APIs, AI workflow automation frameworks, or AI-assisted development tooling (is a bonus)

• Familiarity with API gateway platforms, Kubernetes, AWS cloud services, or event-driven and microservices architectures (is a bonus)

• Mandarin proficiency is highly preferred to support communication with Mandarin-speaking clients and stakeholders.

If you are passionate about technology and meet the above requirements, please don’t hesitate to apply. Please note that only shortlisted candidates will be contacted. Appreciate your understanding. Data provided is for recruitment purposes only.