Senior PHP Developer (High-load / TDS-platform)

Looking for a Senior PHP Developer for a high-load TDS platform. Work with a large codebase, optimize components, and develop new modules in a remote full-time role. We are looking for a mature engineer for a global affiliate program in the mobile services sector. Our internal TDS system processes over 1 billion clicks per month, taking only 5-8 milliseconds per click.

• •Understand unfamiliar parts of the codebase (MVC panel on Yii2, TDS logic, console daemons).
• •Design new modules: automatic split-test smart link, fraud checker, CPM optimization.
• •Optimize high-load components (caching, queues, delayed writes in ClickHouse).
• •Develop REST / GraphQL API and postback endpoints.
• •Assess the impact of changes on migrations, replications, cache, and race conditions.
• •Write tests (Codeception/PHPUnit), conduct code reviews, and resolve production incidents.

• •4+ years of proven backend development experience.
• •Excellent knowledge of PHP 7.4 / 8.x and deep understanding of the Yii2 framework.
• •Experience with MySQL under load (InnoDB, partitioning, master-replica replication).
• •Experience with Redis (caching, task queues).
• •Experience with ClickHouse (VersionedCollapsingMergeTree engines, aggregates, TTL optimization).
• •Skills in tuning Nginx + PHP-FPM, confident in Linux (SSH, systemd, cron).
• •Experience with Docker / docker-compose and Git flow.
• •Practical experience integrating AI tools (ChatGPT/Claude) into development processes.

• •Understanding of traffic arbitrage market specifics, CPA networks, or e-commerce analytics.
• •Experience setting up HAProxy, Supervisor, Prometheus/Grafana, Loki.
• •Familiarity with GeoIP databases (MaxMind) and fraud detection system architecture.