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