Native PHP Developer

Job Description Location: Fully remote, from Vietnam Start date: ASAP Languages: Fluent English is mandatory Industry: Mobile Payment / Digital Monetization / Carrier Billing (Telecom & Fintech) Pragmatike is recruiting on behalf of a global leader in mobile payment and digital content monetization. Operating across 60+ countries, our client connects telecom operators, merchants, content providers, media companies and brands, powering billing capabilities (Direct Carrier Billing, Mobile Money, Local Payment Methods), content distribution, interactivity programs and multi-channel activations. Their platforms process high-volume transactions and seamless user journeys at scale. Professional Background: We're looking for a Native PHP Developer with 5 to 10 years of experience building and maintaining high-throughput, production-grade backend systems. You should have strong command of core (vanilla) PHP, not just framework-driven development, and direct experience with transaction-heavy, mission-critical applications. Experience in payments, billing, telecom, or any high-availability transactional environment is a strong plus. Autonomy, rigor, and problem-solving are essential, as is comfort working independently in a distributed, cross-timezone team. Your Responsibilities: Design, develop and maintain robust backend services in native PHP (7/8) , with clean, testable and well-documented code. Build and optimize high-volume transaction and billing workflows , ensuring reliability, idempotency and data integrity at scale. Develop and maintain REST/SOAP APIs for operator, merchant and third-party integrations. Work with relational databases (MySQL/MariaDB/PostgreSQL): schema design, query optimization, indexing and performance tuning. Integrate with external systems and gateways (payment, messaging/SMS, USSD, carrier connections, monitoring, billing). Implement asynchronous processing using message queues (RabbitMQ, Kafka) and caching layers (Redis/Memcached). Ensure application security, resilience and observability (logging, metrics, alerting) in a high-availability context. Contribute to CI/CD pipelines , code reviews, and Git-based workflows. Collaborate with product, ops and QA teams to ship, monitor and continuously improve services in production. What You Bring: 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. Familiarity with message queues (RabbitMQ/Kafka), caching (Redis), and asynchronous processing. Good understanding of application security and data integrity in sensitive/financial contexts. Fluent English and the ability to work autonomously across timezones. Nice To Have: Exposure…