Senior Full Stack Engineer (Java + React, backend heavy) - Remote Vietnam

Summary

Join Aperia Solutions, a fast-growing FinTech and managed consultancy building B2B accounts payable and payments platforms. You’ll join a mid-size, distributed team working across the full stack — from Terraform infrastructure to Spring Boot services to React interfaces and database migrations. Aperia serves banks, processors, payment facilitators, merchant service providers, ISOs, and government entities. This role offers technical ownership, a collaborative culture, and opportunities to shape product and architecture.

Job Description

We’re seeking a Senior Full Stack Engineer (Java + React, backend heavy) comfortable across backend, frontend, and cloud/infrastructure. You’ll design, build, and maintain secure, high-performance payment systems and integrations. The ideal candidate has strong Java/Spring Boot experience, React front-end skills, relational database expertise (MySQL/Postgres), messaging/event-driven architecture experience, and practical AWS and infrastructure-as-code exposure. Testing discipline, API security (OAuth2/JWT), and familiarity with distributed tracing are important.

Core Responsibilities

• Design, create, maintain, and optimize applications using Spring Boot (MVC and WebFlux), React, and the Microsoft/Java tech stack where applicable.