diff --git a/polevoy_sergey_lab_3/docker-compose.yml b/polevoy_sergey_lab_3/docker-compose.yml
new file mode 100644
index 0000000..d18475c
--- /dev/null
+++ b/polevoy_sergey_lab_3/docker-compose.yml
@@ -0,0 +1,26 @@
+services:
+  service:
+    container_name: service
+    build:
+      context: ./service_service
+      dockerfile: Dockerfile
+    expose:
+      - 5000
+
+  tariff:
+    container_name: tariff
+    build:
+      context: ./tariff_service
+      dockerfile: Dockerfile
+    expose:
+      - 5001
+
+  nginx:
+    image: nginx:latest
+    ports:
+      - "80:80"
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf
+    depends_on:
+      - service
+      - tariff
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/nginx.conf b/polevoy_sergey_lab_3/nginx.conf
new file mode 100644
index 0000000..579cc7f
--- /dev/null
+++ b/polevoy_sergey_lab_3/nginx.conf
@@ -0,0 +1,25 @@
+events { worker_connections 1024; }
+
+http {
+    server {
+        listen      80;
+        listen      [::]:80;
+        server_name localhost;
+
+        location /services/ {
+            proxy_pass http://service:5000/;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
+        location /tariffs/ {
+            proxy_pass http://tariff:5001/;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+    }
+}
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/readme.md b/polevoy_sergey_lab_3/readme.md
new file mode 100644
index 0000000..7c782ba
--- /dev/null
+++ b/polevoy_sergey_lab_3/readme.md
@@ -0,0 +1,34 @@
+# Лабораторная работа №3
+#### ПИбд-42. Полевой Сергей.
+
+#### При выполнении использовал:
+- Python 3.12
+- Flask
+- requests
+- Docker
+- Docker Compose
+
+#### Задание:
+Создать CRUD сервис для каждой сущности с синхронным обменом сообщений. Для этого были выбраны следующие сущности: 
+##### 1. Услуга. Имеет поля: 
+    - id
+    - name
+    - description
+#####  2. Тариф. Имеет поля: 
+    - id
+    - name
+    - price
+    - service_uuid
+
+##### У услуги может быть несколько тарифов с разными ценами.
+##### Были развернуты два сервиса - service_service и tariff_service, синхронно обменивающиеся сообщениями. 
+##### Сущности хранятся в оперативной памяти (без БД)
+
+#### Инструкция
+Для запуска лабораторной работы, перейдите в папку *polevoy_sergey_lab_3* и выполните команду:
+```
+docker-compose up --build --remove-orphans
+```
+
+#### Демонстрация работы
+Доступна по [ссылке](https://disk.yandex.ru/i/TwtZbHobhkfNAg)
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/service_service/Dockerfile b/polevoy_sergey_lab_3/service_service/Dockerfile
new file mode 100644
index 0000000..cb6da10
--- /dev/null
+++ b/polevoy_sergey_lab_3/service_service/Dockerfile
@@ -0,0 +1,11 @@
+FROM python:3.12-alpine
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py .
+
+CMD ["python", "app.py"]
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/service_service/app.py b/polevoy_sergey_lab_3/service_service/app.py
new file mode 100644
index 0000000..0004bb3
--- /dev/null
+++ b/polevoy_sergey_lab_3/service_service/app.py
@@ -0,0 +1,66 @@
+import requests
+from flask import Flask, jsonify, request
+import uuid
+
+app = Flask(__name__)
+
+services = {}
+
+@app.route('/', methods=['GET'])
+def get_services():
+    return jsonify(list(services.values()))
+
+@app.route('/<uuid:service_uuid>', methods=['GET'])
+def get_service(service_uuid):
+    if str(service_uuid) in services:
+        service = services[str(service_uuid)].copy()
+        tariffs_list = []
+        try:
+            response = requests.get(f'http://tariff:5001/with-service/{service_uuid}')
+            tariffs_list = response.json()
+        except requests.exceptions.RequestException:
+            pass
+
+        service['tariffs'] = tariffs_list
+        return jsonify(service)
+
+    return jsonify({'message': 'Service not found'}), 404
+
+@app.route('/', methods=['POST'])
+def create_service():
+    data = request.get_json()
+    if not data or 'name' not in data or 'description' not in data:
+        return jsonify({'message': 'Invalid data. Name and description are required'}), 400
+
+    service_uuid = str(uuid.uuid4())
+    services[service_uuid] = {'uuid': service_uuid, 'name': data['name'], 'description': data['description']}
+
+    return jsonify(services[service_uuid]), 201
+
+
+@app.route('/<uuid:service_uuid>', methods=['PUT'])
+def update_service(service_uuid):
+    if str(service_uuid) not in services:
+        return jsonify({'message': 'Service not found'}), 404
+    
+    data = request.get_json()
+    if not data or 'name' not in data or 'description' not in data:
+        return jsonify({'message': 'Invalid data'}), 400
+    
+    services[str(service_uuid)]['name'] = data['name']
+    services[str(service_uuid)]['description'] = data['description']
+
+    return jsonify(services[str(service_uuid)]), 200
+
+
+@app.route('/<uuid:service_uuid>', methods=['DELETE'])
+def delete_service(service_uuid):
+    if str(service_uuid) in services:
+        del services[str(service_uuid)]
+        return jsonify({'message': 'Service deleted'}), 200
+    
+    return jsonify({'message': 'Service not found'}), 404
+
+
+if __name__ == '__main__':
+    app.run(debug=True, host='0.0.0.0', port=5000)
diff --git a/polevoy_sergey_lab_3/service_service/requirements.txt b/polevoy_sergey_lab_3/service_service/requirements.txt
new file mode 100644
index 0000000..494909e
--- /dev/null
+++ b/polevoy_sergey_lab_3/service_service/requirements.txt
@@ -0,0 +1,2 @@
+Flask==3.0.3
+requests==2.32.3
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/tariff_service/Dockerfile b/polevoy_sergey_lab_3/tariff_service/Dockerfile
new file mode 100644
index 0000000..cb6da10
--- /dev/null
+++ b/polevoy_sergey_lab_3/tariff_service/Dockerfile
@@ -0,0 +1,11 @@
+FROM python:3.12-alpine
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py .
+
+CMD ["python", "app.py"]
\ No newline at end of file
diff --git a/polevoy_sergey_lab_3/tariff_service/app.py b/polevoy_sergey_lab_3/tariff_service/app.py
new file mode 100644
index 0000000..065e9eb
--- /dev/null
+++ b/polevoy_sergey_lab_3/tariff_service/app.py
@@ -0,0 +1,66 @@
+from flask import Flask, jsonify, request
+import uuid
+
+
+app = Flask(__name__)
+
+tariffs = {}
+
+
+@app.route('/', methods=['GET'])
+def get_tariffs():
+    return jsonify(list(tariffs.values()))
+
+
+@app.route('/with-service/<uuid:service_uuid>', methods=['GET'])
+def get_tariffs_with_service(service_uuid):
+    return jsonify(list(filter(lambda t: t["service_uuid"] == str(service_uuid), tariffs.values())))
+
+
+@app.route('/<uuid:tariff_uuid>', methods=['GET'])
+def get_tariff(tariff_uuid):
+    if str(tariff_uuid) in tariffs:
+        return jsonify(tariffs[str(tariff_uuid)])
+    
+    return jsonify({'message': 'Tariff not found'}), 404
+
+
+@app.route('/', methods=['POST'])
+def create_tariff():
+    data = request.get_json()
+    if not data or 'name' not in data or 'price' not in data or 'service_uuid' not in data:
+        return jsonify({'message': 'Invalid data'}), 400
+    
+    tariff_uuid = str(uuid.uuid4())
+    tariffs[tariff_uuid] = {'uuid': tariff_uuid, 'name': data['name'], 'price': data['price'], 'service_uuid': data['service_uuid']}
+
+    return jsonify(tariffs[tariff_uuid]), 201
+
+
+@app.route('/<uuid:tariff_uuid>', methods=['PUT'])
+def update_tariff(tariff_uuid):
+    if str(tariff_uuid) not in tariffs:
+        return jsonify({'message': 'Tariff not found'}), 404
+    
+    data = request.get_json()
+    if not data or 'name' not in data or 'price' not in data or 'service_uuid' not in data:
+        return jsonify({'message': 'Invalid data'}), 400
+    
+    tariffs[str(tariff_uuid)]['name'] = data['name']
+    tariffs[str(tariff_uuid)]['price'] = data['price']
+    tariffs[str(tariff_uuid)]['service_uuid'] = data['service_uuid']
+
+    return jsonify(tariffs[str(tariff_uuid)]), 200
+
+
+@app.route('/<uuid:tariff_uuid>', methods=['DELETE'])
+def delete_tariff(tariff_uuid):
+    if str(tariff_uuid) in tariffs:
+        del tariffs[str(tariff_uuid)]
+        return jsonify({'message': 'Tariff deleted'}), 200
+    
+    return jsonify({'message': 'Tariff not found'}), 404
+
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5001)
diff --git a/polevoy_sergey_lab_3/tariff_service/requirements.txt b/polevoy_sergey_lab_3/tariff_service/requirements.txt
new file mode 100644
index 0000000..494909e
--- /dev/null
+++ b/polevoy_sergey_lab_3/tariff_service/requirements.txt
@@ -0,0 +1,2 @@
+Flask==3.0.3
+requests==2.32.3
\ No newline at end of file