diff --git a/backend/app/database.py b/backend/app/database.py
new file mode 100644
index 0000000..7e19a72
--- /dev/null
+++ b/backend/app/database.py
@@ -0,0 +1,22 @@
+"""Database connection and session management."""
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from app.config import settings
+
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+def get_db():
+    """Get database session."""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()