Backend Payments Engineer - Scalable API & Rails

StraitsX Group; Jakarta Pusat; On-site; IDR 180,000,000 - 360,000,000; Full time

Job summary

StraitsX Group is seeking a mid-level Software Engineer with a backend focus to develop and operate the systems behind fiat and stablecoin payment rails. You will work on the Public API, deposits, payouts, swaps, and settlements for merchants such as crypto exchanges and fintech platforms.

You will collaborate with product managers and other engineers to deliver on the roadmap, maintain production reliability, and scale with merchant traffic.

Qualifications

• At least 2 years of backend engineering experience.
• Proficiency in Ruby on Rails or Golang.
• Strong SQL and relational DB design (MySQL or PostgreSQL).
• Solid understanding of RESTful APIs and microservices architecture.
• Grounding in system design principles and building for scale.
• Comfortable with CI/CD concepts and version control (Git).
• Good written and spoken English.
• Familiarity with AI assisted engineering workflows is a plus.

Responsibilities

• Build and deliver backend features across fiat and stablecoin payment flows and Public API.
• Collaborate with product managers to shape requirements and roadmap.
• Write clean, well-tested, maintainable code and apply best practices.
• Ensure system availability and reliability with monitoring and stress testing.
• Contribute to architecture decisions for scalable, secure financial transactions.
• Participate in code reviews, backlog grooming, and sprint planning.
• Support merchant integrations and L2 investigations.
• Collaborate with frontend engineers to integrate backend services.

Skills

Backend engineering

SQL

RESTful APIs

Microservices

CI/CD

Git

System design

English communication

Tools

Ruby on Rails

Golang

MySQL

PostgreSQL

Git

CI/CD tooling

Job description

StraitsX Group is seeking a mid-level Software Engineer with a backend focus to develop and operate the systems behind fiat and stablecoin payment rails. You will work on the Public API, deposits, payouts, swaps, and settlements for merchants such as crypto exchanges and fintech platforms.

You will collaborate with product managers and other engineers to deliver on the roadmap, maintain production reliability, and scale with merchant traffic.