Job Title: Senior PHP Developer CodeIgniter

Experience: 6+ Years

Primary Skills: PHP, OOP, CodeIgniter, MySQL, Redis

Location/Work Mode: Noida Sector 135

Job Description:

We are looking for a Senior PHP Developer with solid hands-on experience in building, optimizing, and maintaining production backend applications using PHP and CodeIgniter. Candidates must have excellent coding, database optimization, caching, concurrency handling, and client communication skills.

Mandatory Skills:
Robust PHP and OOP concepts, including SOLID principles and design patterns.
Deep understanding of CodeIgniter, MVC architecture, REST API development, and service-layer design.
Strong MySQL skills: schema design, normalization, complex queries, joins, aggregation, indexing, and query optimization using EXPLAIN. Hands-on Redis experience with caching, cache invalidation, sessions, queues, workers, retries, and multiple Redis connections/databases.
Solid understanding of transactions, ACID properties, row-level locking, and concurrency-safe inventory/stock updates.




Experience with third-party API and payment gateway integrations, idempotent webhooks, retries, timeouts, and failure recovery. Knowledge of application security, authentication, authorization, SQL injection, XSS, and CSRF prevention.
Experience with CI/CD, database migrations, rollback strategies, and production troubleshooting.

Positive to Have:
CodeIgniter 4 and migration from CodeIgniter 3.
AWS S3, Docker, Laravel, and PHPUnit.
E-commerce, inventory management, or payment-heavy application experience.

Additional Requirements:
Excellent communication and client-handling skills.
Ability to write and explain code and SQL independently during technical interviews.
Strong production ownership, troubleshooting, and mentoring capabilities.

Important:

Only candidates with proven production-level expertise in PHP/OOP, CodeIgniter, MySQL query optimization, Redis, and concurrency handling required.

📌 Senior Php Developer Noida
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