Senior Full-Stack Developer - Payment Processing Platform

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