Fullstack JavaScript Engineer (Node.js, React)

TL;DR

Fullstack JavaScript Engineer (Node.js/React): Building and maintaining mission-critical payment interface software for retail and B2B transactions with an accent on data consistency, zero-downtime availability, and offline-first capabilities. Focus on architecting scalable systems, optimizing high-throughput data processing, and eliminating technical debt.

Location: Remote (Targeting LATAM or Europe time zones for team overlap)

Salary: Top-Market USD Compensation

Company

hirify.global builds foundational payment interface software that powers modern retail, B2B, and service-industry transactions.

What you will do

• Architect, build, and maintain highly scalable full-stack features using Node.js, React, and TypeScript.
• Optimize complex SQL/NoSQL database queries and schema designs to handle massive transaction volumes.
• Secure and scale RESTful and WebSocket APIs to ensure synchronization between physical POS software and cloud infrastructure.
• Proactively identify and eliminate technical debt, enforcing strict linting, type safety, and comprehensive testing frameworks.
• Collaborate synchronously with core product and engineering leadership as a direct independent contractor.

Requirements

• 5+ years of verified professional experience running production-grade full-stack JavaScript/TypeScript applications.
• Production experience with asynchronous programming, race conditions, and event-driven architectures in Node.js.
• Deep knowledge of React state management, rendering optimization, and modular UI components.
• Strong English communication skills for live architectural discussions and video calls.
• Must be based in LATAM or Europe time zones.

Nice to have

• Experience with cloud infrastructure (AWS/GCP).
• Proficiency with CI/CD pipelines and Dockerized environments.

Culture & Benefits

• Top-market USD compensation calibrated by geographic location and expertise.
• Streamlined B2B contracting with monthly invoicing.
• True autonomy with ownership over modules and no micromanagement.
• Direct impact on core systems affecting thousands of real-world merchant locations daily.

Hiring process

• Initial Intro & System Design: Conversation about experience and a live virtual-whiteboard architecture exercise.
• Live Code Review & Debugging Session: Live audit and refactoring of a messy codebase to identify security and architectural flaws.