Senior Full-Stack Developer - Payment Processing Platform

About this role

Unlock your potential with Quantum ePay® We're a full-service financial technology provider that helps business owners lower their costs, earn more money, and improve their quality of life. We offer truly innovative payment processing solutions and an ever-expanding line of products to boost productivity, enabling our clients to operate efficiently and effectively in confidence.

We're seeking an experienced Senior Full-Stack Developer for a long-term, full-time remote role. Applicants must be currently based in the Philippines. In this role, you'll join our engineering team working on a mission-critical payment processing platform. You'll be responsible for developing, maintaining, and scaling features across our multi-tenant Laravel monolith that processes millions in transactions annually.

ESSENTIAL DUTIES AND RESPONSIBILITIES:

• Design, develop, and maintain full-stack features across Atlas, Merchant Dashboard, and payment processing systems
• Implement secure payment workflows, ACH processing, and financial transaction logic
• Build responsive merchant onboarding applications with complex underwriting rules
• Optimize database queries and payment processing performance for high-volume transactions
• Collaborate with product managers, compliance teams, and payment processors
• Participate in code reviews and mentor developers on payment industry best practices
• Contribute to PCI DSS compliance and security implementations
• Work with legacy systems (Vue 2) while modernizing to React/Inertia.js

TECH STACK

- Backend: Laravel 12, PHP 8.4, MySQL/PostgreSQL, Redis
- Frontend: React, Vue 2, Inertia.js v2, Livewire v3, Tailwind CSS 3/4
- Payment Processing: Custom ACH, chargeback handling, risk assessment
- APIs: REST API, OAuth2 (Laravel Passport), webhooks
- Infrastructure: Docker, AWS S3, SFTP, Redis, Pusher
- Security: PCI DSS compliance, encryption, secure file handling
- Testing: PHPUnit, Laravel Dusk, browser automation
-...