WordPress Malware Removal & Hardening

My WordPress site has been flagged for malware and needs a full, surgical cleanup. What I need now is a comprehensive sweep that eliminates every backdoor, rogue file, and injected script, followed by configuration changes that keep the site clean long-term... (Budget: $12 - $30 SGD, Jobs: MySQL, PHP, Web Application Audit, Web Design, Web Security, Web Services, Web Testing, Website Management, Website Optimization, WordPress)