Backend Engineer, Card Issuing

Greenhouse Software, Inc.; Kuala Lumpur; On-site; MYR 180,000 - 320,000; Full time

Job summary

Greenhouse Software, Inc. is seeking a Senior Backend Engineer to own a core domain in our card issuing platform.

You will design high-availability money-moving systems, build and scale RESTful microservices, and drive integrations with networks and processors in Southeast Asia. You will lead architectural decisions, balance features with reliability, and mentor junior engineers while adopting AI-assisted tools to improve delivery.

Qualifications

• 5+ years of backend engineering experience on high-scale or financial production systems.
• Expert-level Golang and building microservices in cloud environments.
• Advanced SQL skills (MariaDB/MySQL) including transactions and migrations.
• Strong debugging, judgment on trade-offs, and ability to document technical decisions.
• Experience using AI-assisted development tools to accelerate delivery while maintaining quality.

Responsibilities

• Lead technical design for high-availability money-moving systems and architecture decisions.
• Own a core domain (authorization, settlement) with focus on reliability and debt-management.
• Build and scale RESTful microservices with strict idempotency and PCI DSS compliance.
• Drive integrations with card networks, payment processors, and third-party providers.
• Collaborate with Product, QA, and Ops to break down problems into deliverable work and mentor juniors.
• Pioneer AI-assisted tooling to automate engineering and op workflows in payments contexts.

Skills

Golang

Backend design

Microservices

SQL

Cloud native

Tools

Docker

Kubernetes

CI/CD

Job description

About the Role

We are looking for a Senior Backend Engineer to join our Card Issuing Team, which builds the APIs and infrastructure that let businesses launch and manage their own card programs across Southeast Asia. You will take ownership of a core domain within our live production platform, setting the technical direction and raising the engineering bar. This role suits someone who has run high-stakes production systems and is comfortable making architectural decisions with incomplete information.

What You Will Do

Lead the technical design (writing RFCs) for high-availability money-moving systems, making critical decisions on scalability, consistency, and failure handling.

Take full technical ownership of a core domain (e.g., authorization, settlement), balancing new product features with technical debt and reliability.

Build and scale RESTful microservices, ensuring strict idempotency, reconciliation correctness, and security (PCI DSS) in every financial flow.

Drive technical integrations with card networks, payment processors, and third-party providers.

Partner with Product, QA, and Ops to break down ambiguous problems into deliverable work, while mentoring junior/mid-level engineers.

Pioneer the use of AI tools and agents to safely automate engineering and operational workflows within a regulated payments environment.

What We Are Looking For

5+ years of backend engineering, with a strong track record of designing, launching, and operating high-scale or financial production systems.

Expert-level Golang with deep experience building microservices deployed on modern cloud infrastructure (Docker, Kubernetes, CI/CD).

Advanced SQL skills (MariaDB/MySQL), including query optimization, transactions, locking, and live schema migrations.

Excellent debugging skills, sound judgment on technical trade-offs, and the ability to write clear technical documents to drive team alignment.

Hands-on experience using AI-assisted development tools (like Claude or Cursor) to accelerate delivery without compromising code quality.

Domain Knowledge (Bonus):Prior experience with payments, card issuing, settlement systems, network integrations (Visa/Mastercard, ISO 8583), or PCI DSS compliance is a strong plus.