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

Monetary Authority of Singapore (MAS); Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

A financial regulatory authority in Singapore seeks an experienced Solution/Systems Architect to lead the development of Nexus Global Payments. This role involves defining the technical architecture, ensuring interoperability, and working alongside regulatory stakeholders. The ideal candidate has 8-10 years of experience in solution architecture, particularly with payment systems, strong knowledge of API standards and security models, and the ability to produce essential architectural artefacts. This position is a 1-year contract offering a challenging and dynamic working environment.

Qualifications

• 8–10 years of experience in solution architecture for critical IT systems.
• Experience in payments, clearing, and settlement systems.
• Proven ability to create architectural artefacts.

Responsibilities

• Define and maintain the technical architecture for Nexus.
• Produce and review architectural artefacts.
• Ensure integration requirements are clearly defined and implemented.
• Validate technical architecture and challenge assumptions.

Skills

Solution architecture

Experience in payments systems

API standards knowledge

Security models knowledge

Resilience design

Infrastructure design

Network topology understanding

Security architecture

Vendor architecture assessment

Job description

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 will 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.

As part of the shortlisting process for this role, you may be required to complete a medical declaration and/or undergo further assessment. This is a 1‑year contract. All applicants will be notified on whether they are shortlisted or not within 4 weeks of the closing date of this job posting.