Senior PHP Developer for Automation Platform

# Senior PHP Developer Needed for Automation Platform Calibration & Long-Term Support We are looking for an experienced PHP developer to calibrate, stabilize, optimize, and maintain an existing automation platform connected to Japanese Yahoo Auctions. The platform is already developed, deployed on AWS, and operational, but it currently requires full system calibration, debugging, stabilization, and ongoing optimization for reliable long-term production usage. This is not a beginner-level website project. We are looking for a developer who can independently troubleshoot, optimize, and maintain a complex automation-based system. The platform works through browser interaction logic and behavioral pacing because direct API functionality is limited. The core functionality already exists, but the system now needs to become stable, reliable, and production-ready for continuous operation. ## Responsibilities * Calibrate and optimize the entire platform * Fix bugs and unstable behavior * Improve automation reliability * Optimize system performance * Monitor uptime and operational stability * Improve error handling and recovery * Support future upgrades and feature development * Provide long-term technical maintenance ## Required Skills * Strong PHP development experience * Experience debugging complex systems * Performance optimization experience * AWS environment familiarity * Ability to work independently * Experience maintaining production environments ## Nice to Have * Browser automation experience * Experience with interaction/timing-based systems * Experience working with Japanese platforms/websites * Long-term support mindset * Experience improving automation stability and reliability ## Project Status The platform is already functioning and deployed on AWS, but it is currently not stable enough for reliable long-term production usage. The main objective is to fully calibrate, stabilize, and optimize the system. ## We Are Looking For Someone Who * Can think independently and solve problems * Communicates clearly * Is comfortable working with existing codebases * Can provide long-term support after stabilization * Is proactive about reliability and system stability ## Please Include in Your Proposal 1. Your PHP and AWS experience 2. Similar systems or automation projects you worked on 3. Your experience stabilizing existing platforms 4. Your approach to debugging unreliable systems 5. Your availability for long-term cooperation We are open to mid-range and expert-level developers depending on experience and fit. Long-term cooperation and future development opportunities are available for the right candidate.