Senior PHP Developer

About the Role We are looking for an experienced Senior PHP Developer to join our team and take ownership of critical components of a large-scale, high-load platform processing tens of thousands of requests per second and terabytes of data daily. Our core product is a powerful enterprise monolith with a modular architecture. As the business continues to grow, we focus on maintaining exceptional reliability, performance, and scalability while continuously evolving the platform. You will work alongside a team of senior-level engineers, contributing to architectural decisions, optimizing distributed processes, and driving engineering excellence across the organization. What You'll Do Core Platform Development Design, develop, and optimize key modules of a high-performance PHP platform. Ensure reliability, maintainability, and scalability of the codebase. Take technical ownership of critical business domains and services. Architecture & System Design Participate in architectural decision-making for a large enterprise monolith. Design integration patterns with databases and external systems. Improve modularity and maintain clear boundaries between platform components. Data Layer Optimization Design efficient data models and storage strategies. Optimize MySQL queries and ORM performance under heavy production workloads. Work with large datasets and contribute to analytical solutions using ClickHouse. Event-Driven Architecture Design and maintain asynchronous processing solutions using Apache Kafka. Build reliable integrations between internal services and external systems. Observability & Reliability Integrate telemetry into applications using OpenTelemetry-based solutions. Analyze application performance and identify bottlenecks. Troubleshoot and resolve production incidents. Contribute to monitoring, logging, and tracing practices. Engineering Excellence Conduct meaningful code reviews and mentor fellow engineers. Promote high development standards and best practices. Collaborate closely with Product Managers, QA Engineers, DevOps, and other stakeholders.