StraitsX is hiring a Software Engineer, Payments in STX - Engineering (Jakarta, Jakarta, Indonesia).
About The Role
We are looking for a mid-level Software Engineer with a strong backend focus to join our Fiat Payment Products team. You will build and operate the systems behind our fiat and stablecoin payment rails, including our Public API that powers deposits, payouts, swaps, and settlement for merchants like crypto exchanges, PSPs, and fintech platforms.
The role is primarily backend. You will work closely with product managers, fellow engineers, and integration support to deliver on the roadmap and keep production systems reliable as merchant traffic scales. We value technical proficiency, clear communication, ownership, and the ability to work independently. Experience with financial systems or crypto is a plus, and any frontend experience is welcome.
Key Responsibilities
- Build and deliver backend features across our fiat and stablecoin payment flows and Public API.
- Collaborate with product managers to shape requirements and deliver against the product roadmap.
- Write clean, well-tested, maintainable code and apply engineering best practices.
- Ensure system availability and reliability through robust monitoring, stress testing, and maintenance as merchant traffic scales.
- Contribute to architecture decisions, data-driven tradeoffs, and the design of scalable, secure systems for financial transactions.
- Participate in code reviews, backlog grooming, and sprint planning.
- Support merchant integrations and L2 investigation alongside the team.
- Collaborate with frontend engineers to integrate backend services smoothly.
What We Are Looking For
- At least 2 years of backend engineering experience, proficient in a language such as Ruby on Rails, Golang or other related backend technologies
- Strong SQL and relational database 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
- Experience with financial systems, payments, or fintech infrastructure is a plus.
- Familiarity with crypto, stablecoins, or blockchain is a plus.
- Experience with Agile delivery is a plus.
- Frontend familiarity (React, TypeScript, or JavaScript) is a plus.
About StraitsX
StraitsX, founded in 2020 in Singapore as the stablecoin arm of payments company Xfers, issues XSGD and XIDR — the leading regulated Singapore dollar and Indonesian rupiah stablecoins licensed as a Major Payment Institution under Monetary Authority of Singapore oversight. Created by Xfers founders Tianwei Liu and Victor Liew, the platform powers cross-border B2B payments, on-off ramps and DeFi integrations through partnerships with DBS and regional banks. Focused on Southeast Asian compliance and banking rails, StraitsX enables programmable money movement for fintechs and institutions without handling user custody directly. Headquartered in Singapore at Ayer Rajah Crescent, the team bridges traditional finance and on-chain settlement with careful licensing. The culture values regulatory craft, payments reliability and building compliant stablecoin infrastructure for Southeast Asia.