Senior Full-Stack Developer - Payment Processing Platform (Remote – Philippines Only)

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

Code Quality: Laravel Pint, Larastan, PHPStan

TECHNICAL REQUIREMENTS

Strong PHP/Laravel Expertise: 4+ years PHP development, 2+ years Laravel (Laravel 10+ preferred)

Payment Processing Experience: Understanding of payment gateways, ACH, PCI DSS, financial transactions

Database Design: Complex Eloquent relationships, query optimization for financial data

Frontend Development: React proficiency, Vue.js experience, Inertia.js knowledge

Security-First Mindset: Experience with financial data handling, encryption, compliance

API Development: RESTful API design, OAuth2 implementation, webhook handling

Testing: PHPUnit for backend, Dusk for end-to-end testing

NICE TO HAVES

Experience with payment processing platforms or fintech

Knowledge of ACH networks, chargeback processes, underwriting

Multi-tenant application architecture

Legacy system modernization (Vue 2 to React)

Docker containerization and deployment

AWS services (S3, SES, etc.)

Real-time features with Pusher/Socket.io

PDF generation, document processing

International payment processing

DOMAIN KNOWLEDGE

Understanding of merchant services industry

Knowledge of payment card industry standards

Experience with financial risk assessment

Familiarity with banking integrations

SOFT SKILLS

Strong analytical skills for complex business logic

Experience working in regulated environments

Ability to handle sensitive financial data responsibly

Collaborative team player with cross-functional experience

Passion for building reliable, secure financial systems

EDUCATION & EXPERIENCE

Bachelor's degree in Computer Science, Software Engineering, or related field

4+ years professional software development experience

Experience with high-stakes, mission-critical applications

Background in fintech, payments, or financial services preferred

ELIGIBILITY REQUIREMENTS

Must be based in the Philippines

Must be available for full-time, long-term work

Comfortable working as an independent contractor

Reliable internet and remote work setup