Senior PHP Developer $

QIT Software is looking for a Senior PHP Developer to join our team. You'll own the maintenance, modernization, and evolution of a core billing platform built on a large-scale PHP monolith. This is a high-traffic, business-critical system running on Kubernetes infrastructure. You'll troubleshoot production issues, drive performance and scalability improvements, and contribute across the full development lifecycle -- from design through deployment.

Details:
- Schedule: Full-time, remote
- Client: USA
- Duration: long-term
- Tech stack: PHP, MySQL, AWS, Docker, etc.
Requirements

- 5+ years of strong professional PHP experience
- Solid foundation in OOP patterns, Clean Code, and SOLID principles
- Experience maintaining and improving complex legacy systems
- Strong MySQL skills -- writing efficient, high-performance queries
- Hands-on Docker and AWS experience
- Experience with AI-assisted development tools (Cursor, Claude Code, or similar)
- Business-level English (written and spoken)
- Strong debugging, analytical, and problem-solving skills

Responsibilities

- Maintain, modernize, and evolve the billing platform and its components
- Diagnose and resolve high-impact production issues in a high-traffic environment
- Drive improvements in performance, scalability, and reliability
- Produce clear technical documentation for existing and new systems
- Promote knowledge sharing and best practices across the team

Would be a plus

- Kubernetes and Helm experience
- Queue-based or asynchronous systems
- Non-relational databases
- CI/CD pipelines
- Observability tools (Datadog, Grafana)

Work conditions

- The ability to work remotely from anywhere in the world;
- Flexible work schedule, no micromanagement, no strict deadlines and free overtime work;
- Work in European and American products with a modern technology stack in different industries (Finance, Technology, Health, Construction, Media, etc.);
- Revision of wages every year or on an individual basis;
- Accounting support and full payment of taxes by the company;
- 100% compensation for remote English lessons;
- 15 paid leaves (PTO) and public holidays.