Monetary Authority of Singapore

Solution/Systems Architect, Nexus Global Payments (1-Year Contract)

Fixed Terms

Closing on 08 Dec 2025

What the role is

We are seeking an experienced Solution/ Systems Architect to spearhead the next phase of payments development in Singapore, particularly in the establishment of the Nexus Global Payments (NGP). Set up by the central banks of India, Malaysia, the Philippines, Singapore, and Thailand, Nexus is a multilateral payment scheme dedicated to transforming cross-border transactions in line with the G20 Roadmap for Enhancing Cross-border Payments targets of speed, cost, accessibility, and transparency. Nexus revolutionises instant cross-border payments by inter-connecting domestic Instant Payment Systems (IPS), facilitating secure, real-time transactions globally. With a single integration into Nexus, payment systems can access a global network, eliminating the need for expensive, custom solutions.

NGP is incorporated as a not-for-profit CLG headquartered in Singapore. More information about NGP can be found at: https://www.nexusglobalpayments.org/
The Solution/ Systems Architect is responsible for defining and governing the end-to-end technical architecture of Nexus Global Payments. The role ensures that the Nexus Gateway and its integrations with IPSOs, PSPs, and FXPs are designed for interoperability, resilience, and security. The Architect will work closely with the Nexus Technical Operator (NTO), and the Architect is expected to provide independent validation of the NTO’s solution design. The Solution/ Systems Architect will be reporting to NGP's Head of Technology.

What you will be working on

Define and maintain the technical architecture covering application, infrastructure, network, and security domains.
Produce and review architectural artefacts, including component diagrams, sequence flows, logical data models, and deployment views.
Ensure integration requirements between Nexus Gateway, IPSOs, PSPs, and FXPs are clearly defined and consistently implemented.
Validate the technical architecture, challenging assumptions where necessary while offering pragmatic alternatives.
Design for interoperability and avoidance of lock-in, promoting open standards (ISO 20022, APIs, PKI).
Develop, review and maintain resilience and recovery models, including active/active, failover, and monitoring capabilities.
Define and review/challenge trust boundaries, certificate and key management flows, and threat models.
Contribute to SOC/NOC design and promote use of advanced monitoring, anomaly detection, and AI-assisted triage.
Work closely with the Nexus scheme workstream and MAS regulatory stakeholders to align technical designs with compliance and supervisory expectations.

What we are looking for

Skills and Experience

8–10 years’ experience in solution architecture for mission critical IT systems.
Must possess an experience in payments, clearing, and settlement systems.
Strong knowledge of API standards, security models, and resilience design.
Must possess a knowledge of ISO20022 standards.
Proven ability to create architecture artefacts such as component diagrams, sequence flows, logical data models, and deployment topologies.
Experience with infrastructure design across shared cloud, local cloud, and on-prem environments.
Deep understanding of secure network topologies and interconnection between operators, participants, and third-party providers.
Strong grounding in security architecture, PKI, and key/certificate management.
Ability to assess and challenge vendor architectures while remaining pragmatic and solution-oriented.
Track record of working with cross-border or multi-jurisdictional payment systems is a strong advantage.

Personal Attributes

Analytical thinker with a structured approach to problem-solving.
Strong communication and stakeholder management skills, with the ability to influence across technical and non-technical audiences.
Comfortable working in a multi-stakeholder international environment.
Pragmatic, able to balance ideal architecture principles with delivery realities.

About your application process

This job is closing on 08 Dec 2025.

If you do not hear from us within 4 weeks of the job ad closing date, we seek your understanding that it is likely that we are not moving forward with your application for this role. We thank you for your interest and would like to assure you that this does not affect your other job applications with the Public Service. We encourage you to explore and apply for other roles within Monetary Authority of Singapore or the wider Public Service.

About Monetary Authority of Singapore

MAS is the central bank of Singapore. Our mission is to promote sustained non-inflationary economic growth, and a sound and progressive financial centre.

Learn more about Monetary Authority of Singapore