Frontend Engineer (ReactJS)

Working location: Tan My Ward, (District 7), HCMC - For Vietnamese professionals.
Salary range: Up to VND 65,000,000 gross
RESPONSIBILITIES
This is a Mid/Senior Frontend Engineer (React + TypeScript) building the consumer-facing experience - payment gateway, dynamic checkout, merchant/consumer flows - for a US-market fintech product.
●Design, build, and maintain accessible, responsive React experiences across our payment,
merchant, dynamic checkout and internal operations products.
●Own frontend architecture across the codebase, including application structure, state management, data flow, component boundaries, API integration, and dependencies. Surface architectural, performance, and reliability risks early.
●Establish reusable patterns, shared components, and engineering standards across products and teams.
●Act as the technical point of contact for frontend decisions with US-based stakeholders, and raise the quality bar through code review, pairing, and guidance.
●Implement complex flows involving payments, multi-currency experiences, asynchronous states, retries, failures, validations, and edge cases.
●Improve performance, reliability, accessibility, security, and maintainability across the frontend codebase.
●Investigate production issues, support root-cause analysis, and help prevent recurring problems.
REQUIREMENTS
●5+ years React/TypeScript, proven end-to-end ownership of production apps (not just team contributor)
●Strong frontend architecture judgment - state management, component boundaries, API integration
●Comfortable being a technical anchor: driving decisions, code review, raising the bar for others
●Clear written/verbal English
●Genuinely available for up to 15 hrs/week overlap with New York hours (this usually means a later start in Vietnam - afternoon into evening)
Strong plus
●Payments/fintech/banking experience
●[protected info] experience
●Testing tools (Jest, RTL, Cypress, Playwright)
Mindset
●Growth mindset - comfort with feedback, learning quickly, and a thoughtful (not passive)
approach to AI coding tools like Copilot/Cursor/Claude Code
●Fast-paced/startup comfort - this team's process and structure are still being set up, so candidates should be comfortable with some ambiguity rather than needing everything fully defined upfront
Team context
●Works closely with the design team and broader engineering team - one connected product portfolio, not siloed work
●The design team here is very detail-oriented about UX, so engineers need to be able to meet that bar, not just take instruction
●Weekly sprints