At PetroAPP, we rely on robust and secure backend systems to power high-volume transactions and integrations. We are looking for a Senior Software Backend Engineer who will take ownership of complex backend systems, lead technical initiatives, and mentor other engineers. This role focuses on scalability, performance, and reliability across payment-driven platforms. Roles and Responsibilities Lead the design and development of scalable backend services using PHP and Laravel Own complex backend features from design through production Architect and optimize transaction-heavy systems for performance and reliability Drive best practices in code quality, testing, and system design Lead and participate in code reviews Mentor junior and mid-level engineers Collaborate with product, engineering, and leadership teams on technical decisions Improve backend architecture, security, and observability Ensure backend systems support high availability and growth Maintain high-quality technical documentation Competitive salary and benefits package. Opportunity to work on cutting-edge technology with a passionate team. Career growth and development opportunities. A collaborative and inclusive work environment. Bachelor’s degree in Computer Science or related field 6+ years of backend development experience Deep expertise in PHP and Laravel - Knowledge of other programming languages such as Node Js, Python is a plus Strong experience with database design, optimization, and transactions Proven ability to build and scale payment or integration-heavy systems Experience leading technical initiatives and mentoring engineers Excellent problem-solving and communication skills