diff --git a/harvester/db/__init__.py b/harvester/db/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/harvester/db/models.py b/harvester/db/models.py
new file mode 100644
index 0000000..d6b834a
--- /dev/null
+++ b/harvester/db/models.py
@@ -0,0 +1,25 @@
+# harvester/db/models.py
+
+from sqlalchemy import Column, Integer, String, DateTime
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
+
+
+class Proxy(Base):
+    __tablename__ = 'proxies'
+
+    id = Column(Integer, primary_key=True)
+    host = Column(String, nullable=False)
+    port = Column(Integer, nullable=False)
+    asn = Column(String)
+    egress_ip = Column(String)
+    egress_asn = Column(String)
+    date_added = Column(DateTime, nullable=False)
+    date_validated = Column(DateTime)
+
+    def __repr__(self):
+        return (
+            f'Proxy(id={self.id}, host={self.host}, port={self.port}, '
+            f'egress={self.egress}, created_at={self.created_at})'
+        )
diff --git a/harvester/db/session.py b/harvester/db/session.py
new file mode 100644
index 0000000..34b5c1d
--- /dev/null
+++ b/harvester/db/session.py
@@ -0,0 +1,28 @@
+# harvester/db/session.py
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+
+class SessionFactory:
+    def __init__(self, engine_url):
+        self.engine = create_engine(engine_url)
+        self.Session = sessionmaker(bind=self.engine)
+
+    def create_session(self):
+        return self.Session()
+
+
+# Create a singleton instance of the SessionFactory
+session_factory = None
+
+
+def get_session_factory(engine_url):
+    global session_factory
+    if session_factory is None:
+        session_factory = SessionFactory(engine_url)
+    return session_factory
+
+
+def get_session(engine_url):
+    return get_session_factory(engine_url).create_session()
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 10e8710..8f0cbbb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 requests
-requests[socks]
\ No newline at end of file
+requests[socks]
+sqlalchemy
\ No newline at end of file