nfq - Senior Software Engineer (PHP)

• Design and implement complex features including subscriptions, invoicing flows, and core platform capabilities • Build and maintain internal and external APIs used by the web application and integration partners • Ensure long-term system reliability, scalability, and maintainability across critical business systems • Apply SOLID principles and Domain-Driven Design to guide technical decisions and architecture • Facilitate technical discussions, planning, and estimation within the cross-functional team • Continuously improve observability and overall quality • Min 5+ years of solid professional experience in backend engineering • Strong hands-on experience with modern PHP (8.2+) • Expert-level knowledge of at least one modern PHP framework (e.g. Symfony) • Expert-level knowledge of relational databases, preferably MySQL • Experience designing and building complex business systems (subscriptions, APIs, integrations) • Proven ability to refactor complex systems while keeping production stable • Experience with modular or layered architectures and SOLID design principles • Regular use of AI-powered development tools as a daily productivity booster • Autonomous, hands-on work style with strong debugging and problem-solving skills • Fluent English with effective communication skills in a distributed team • We consider the following experience as an advantage • Experience working on business-critical systems (e.g., payments, subscriptions, integrations) • Experience integrating with third-party APIs at scale (authentication, webhooks, retries, rate limits, observability) • Understanding Domain-Driven Design concepts and layered architecture principles • Familiarity with AWS or similar cloud vendors