Aleksandr Efimov

I've built and modernized PHP platforms for ApplyWave, Carbon Solutions Group, AutoTrader.ca, MindGeek/Aylo, and Exness. My work spans SaaS architecture, legacy monolith migrations, REST APIs, payments integrations, and production performance.

At Carbon Solutions Group, I reduced a key production API from 10 seconds to 600ms through index redesign, JOIN restructuring, and selective projection. At Trader Corporation, I owned backend modernization of a major PHP monolith, moving it from PHP 5.5 to 8.2 with PSR-4, dependency injection, SOLID refactoring, Redis queues, and production PHP-FPM tuning.

I've worked on platforms serving 100M+ daily visitors and fintech infrastructure supporting banking, payments, and forex workflows. I build security-conscious authentication and integration systems using RBAC, 2FA, LDAP, HashiCorp Vault, webhooks, idempotency, and GDPR-aware data handling.

I'm comfortable owning architecture end to end, from schema design and caching to Docker, CI/CD, observability, and mentoring teams. I also authored the open-source laravel-rest package adopted across Exness teams.