PostgreSQL is one of the most powerful open-source databases in the world — yet most backend developers barely scratch the surface of what it can do. If you find yourself writing the same basic CRUD queries over and over, struggling with slow endpoints, or guessing why your database design breaks under real traffic, this course will change how you work with Postgres forever. Across six focused lessons, you will move from foundational concepts to production-grade techniques. You will start with relational design and normalization, then master advanced querying with JOINs, subqueries, window functions and CTEs. You will learn to design and optimize indexes that actually speed up your queries, and use EXPLAIN ANALYZE to diagnose performance bottlenecks instead of guessing. Finally, you will cover transactions, isolation levels and concurrency control — the knowledge that separates junior developers from seniors when things go wrong in production. Every lesson is built around real backend scenarios: paginated APIs, reporting endpoints, data integrity in concurrent systems, and query optimization under load. You will not just learn SQL syntax — you will learn when to use which approach, and why. This course is designed for backend developers who already work with databases but want to go deeper into PostgreSQL specifically. Whether you are building APIs, microservices or data pipelines, if SQL feels like a bottleneck in your daily work, this is for you. No prior PostgreSQL expertise required — just solid familiarity with writing basic queries. Stop fighting your database. Start designing schemas and queries that scale. Enroll now and level up your Postgres skills.