Principal Software Engineer, FundsCore

PLT Engineering; Singapore; On-site; SGD 180,000 - 260,000; Full time

Job summary

Grab is seeking a Principal Engineer for Payments to drive architecture and end-to-end delivery of regional-scale payment platforms powering consumer, driver, merchant, and enterprise ecosystems in Southeast Asia.

You will design fault-tolerant, compliant, and cost-efficient services processing high transaction volumes across multiple countries, currencies, and regulatory regimes, partnering with Product, Risk, Compliance, Finance, Operations, and country teams.

Responsibilities

• Own design and delivery of mission-critical payment systems with high availability, low latency, and strict correctness.
• Define core payments architecture and drive platformisation with clear domains, stable APIs, event contracts, data models, and versioning.
• Build resilient integrations to card networks, banks, APMs, and real‑time rails that tolerate changes and outages.
• Champion reliability, observability, security, compliance, scalability, operability, and cost with SRE and Security, and lead chaos tests, DR, and incidents.
• Lead regionalization across currency, localization, regulation, and scheme needs with safe rollouts and migrations.
• Make pragmatic, data‑driven decisions that balance impact, speed, and maintainability, and align stakeholders on trade‑offs.
• Author and review design docs/RFCs, lead architecture reviews, set coding/testing standards, and elevate service.
• Lead by example with prototypes and critical‑path builds, mentor senior and staff engineers, and scale best practices and culture.

Job description

Get to Know the Team

At GFin and Grab Financial Service, we're building the future of payments in Southeast Asia. As Principal Engineer for Payments, you will lead the end-to-end engineering organization powering all payment experiences across the Grab ecosystem – from in-app wallet transactions and online checkouts, to in-store POS payments and acquiring services for merchants.

Get to Know the Role

As a Principal Engineer for Payments at Grab, you will be the technical driver behind the architecture and delivery of regional-scale payments platforms that power our consumer, driver, merchant, and enterprise ecosystems across Southeast Asia. You will design and ship fault-tolerant, compliant, and cost-efficient services that process high volumes of transactions across multiple countries, currencies, payment methods, and regulatory regimes.

You will partner closely with Product, Risk, Compliance, Finance, Operations, and country teams to build platform capabilities spanning authorization, capture, settlement, reconciliation, disbursements/payouts, refunds and disputes, as well as wallets and real-time bank transfers. You will set the technical vision, lead complex multi-quarter initiatives, and raise engineering quality across the organization through design leadership, hands‑on implementation, and mentorship.

You will report to the Head of Engineering, FundsCore.

Work type: 5-day onsite at Grab One-North office.

The Critical Tasks You Will Perform

• Own design and delivery of mission-critical payment systems with high availability, low latency, and strict correctness.
• Define core payments architecture and drive platformisation with clear domains, stable APIs, event contracts, data models, and versioning.
• Build resilient integrations to card networks, banks, APMs, and real‑time rails that tolerate changes and outages.
• Champion reliability, observability, security, compliance, scalability, operability, and cost with SRE and Security, and lead chaos tests, DR, and incidents.
• Lead regionalization across currency, localization, regulation, and scheme needs with safe rollouts and migrations.
• Make pragmatic, data‑driven decisions that balance impact, speed, and maintainability, and align stakeholders on trade‑offs.
• Author and review design docs/RFCs, lead architecture reviews, set coding/testing standards, and elevate service.
• Lead by example with prototypes and critical‑path builds, mentor senior and staff engineers, and scale best practices and culture.