Native PHP Developer
RemoteVietnam
Job Summary
Design, develop, and maintain robust backend services in native PHP (7/8) for high-volume transaction and billing workflows. Build and optimize REST/SOAP APIs for operator, merchant, and third-party integrations while managing relational databases for schema design and query optimization. Integrate with external systems including payment gateways, messaging, USSD, and carrier connections using message queues and caching layers. Ensure application security, resilience, and observability in a high-availability context, contributing to CI/CD pipelines and code reviews. Collaborate with product, ops, and QA teams to ship and monitor services in production. Fluent English and autonomy across timezones are mandatory.
Required Qualifications
- Fluent English
- 5 to 10 years of experience building and maintaining high-throughput, production-grade backend systems
- Strong command of core (vanilla) PHP, not just framework-driven development
- Direct experience with transaction-heavy, mission-critical applications
- Experience in payments, billing, telecom, or any high-availability transactional environment
- Autonomy
- Rigor
- Problem-solving
- Comfort working independently in a distributed, cross-timezone team
- Expert-level native/core PHP (7/8)
- Solid OOP, design patterns, and clean architecture
- Proven experience with high-throughput, transactional backend systems (mandatory)
- Strong SQL skills (MySQL/MariaDB/PostgreSQL): modeling, optimization, debugging
- Solid experience designing and consuming REST/SOAP APIs
- Comfort with Linux environments, Git and CI/CD workflows
- Good understanding of application security and data integrity in sensitive/financial contexts
- Familiarity with message queues (RabbitMQ/Kafka), caching (Redis), and asynchronous processing
- Exposure to payment, billing, or telecom platforms (DCB, Premium SMS, USSD, Mobile Money, LPM)
- Experience with a modern PHP framework (Symfony, Laravel) alongside native PHP
- Docker / containerization and basic CI/CD tooling
- Familiarity with monitoring/logging stacks (Prometheus, Grafana, ELK/Graylog)
- Awareness of PCI-DSS or other security/compliance standards
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