diff --git a/003-team-sprint-board/app.py b/003-team-sprint-board/app.py
new file mode 100644
index 0000000..b4f56ac
--- /dev/null
+++ b/003-team-sprint-board/app.py
@@ -0,0 +1,108 @@
+from flask import Flask, request, jsonify, abort
+import uuid
+
+app = Flask(__name__)
+
+# In-memory storage
+# board = { "Backlog": [], "In Progress": [], "Review": [], "Done": [] }
+# cards = { card_id: { ...card_data... } }
+board_columns = ["Backlog", "In Progress", "Review", "Done"]
+cards = {}
+
+VALID_STORY_POINTS = {None, 1, 2, 3, 5, 8, 13}
+
+def get_user():
+    user = request.headers.get('X-User-Name')
+    if not user:
+        abort(400, description="Display name is required in X-User-Name header")
+    return user
+
+@app.route('/board', methods=['GET'])
+def get_board():
+    get_user()
+    result = {col: [] for col in board_columns}
+    for card_id, card in cards.items():
+        col = card['status']
+        if col in result:
+            card_copy = card.copy()
+            card_copy['id'] = card_id
+            result[col].append(card_copy)
+    return jsonify(result)
+
+@app.route('/cards', methods=['POST'])
+def create_card():
+    get_user()
+    data = request.json or {}
+    column = data.get('column')
+    title = data.get('title')
+    description = data.get('description', '')
+    story_points = data.get('story_points')
+
+    if column not in board_columns:
+        abort(400, description="Invalid column")
+    if not title:
+        abort(400, description="Title is required")
+    
+    # Validate story points
+    if story_points is not None and story_points not in VALID_STORY_POINTS:
+        abort(400, description="Invalid story points. Allowed: 1, 2, 3, 5, 8, 13 or blank")
+
+    card_id = str(uuid.uuid4())
+    cards[card_id] = {
+        'title': title,
+        'description': description,
+        'story_points': story_points,
+        'status': column
+    }
+    return jsonify({'id': card_id}), 201
+
+@app.route('/cards/<card_id>', methods=['PUT'])
+def update_card(card_id):
+    get_user()
+    if card_id not in cards:
+        abort(404, description="Card not found")
+    
+    data = request.json or {}
+    card = cards[card_id]
+    
+    title = data.get('title', card['title'])
+    if not title:
+        abort(400, description="Title is required")
+    
+    description = data.get('description', card['description'])
+    story_points = data.get('story_points', card['story_points'])
+    status = data.get('status', card['status'])
+    
+    if status not in board_columns:
+        abort(400, description="Invalid status")
+    
+    if story_points is not None and story_points not in VALID_STORY_POINTS:
+        abort(400, description="Invalid story points. Allowed: 1, 2, 3, 5, 8, 13 or blank")
+        
+    card.update({
+        'title': title,
+        'description': description,
+        'story_points': story_points,
+        'status': status
+    })
+    
+    return jsonify(card)
+
+@app.route('/cards/<card_id>', methods=['DELETE'])
+def delete_card(card_id):
+    get_user()
+    if card_id not in cards:
+        abort(404, description="Card not found")
+    del cards[card_id]
+    return '', 204
+
+@app.route('/board/done', methods=['DELETE'])
+def clear_done():
+    get_user()
+    to_delete = [card_id for card_id, card in cards.items() if card['status'] == 'Done']
+    for card_id in to_delete:
+        del cards[card_id]
+    return '', 204
+
+if __name__ == '__main__':
+    app.run(debug=True, port=5000)
diff --git a/003-team-sprint-board/requirements.txt b/003-team-sprint-board/requirements.txt
new file mode 100644
index 0000000..95fef4e
--- /dev/null
+++ b/003-team-sprint-board/requirements.txt
@@ -0,0 +1 @@
+Flask==3.0.3
diff --git a/003-team-sprint-board/run_tests.sh b/003-team-sprint-board/run_tests.sh
new file mode 100755
index 0000000..1cc9a25
--- /dev/null
+++ b/003-team-sprint-board/run_tests.sh
@@ -0,0 +1,8 @@
+pip install -r requirements.txt
+python3 app.py > app.log 2>&1 &
+APP_PID=$!
+sleep 2
+python3 test_api.py
+RESULT=$?
+kill $APP_PID
+exit $RESULT
diff --git a/003-team-sprint-board/test_api.py b/003-team-sprint-board/test_api.py
new file mode 100644
index 0000000..fe6c45a
--- /dev/null
+++ b/003-team-sprint-board/test_api.py
@@ -0,0 +1,113 @@
+import requests
+import json
+
+BASE_URL = "http://127.0.0.1:5000"
+HEADERS = {"X-User-Name": "TestUser", "Content-Type": "application/json"}
+
+def test_user_identity():
+    print("Testing User Identity...")
+    # Request without header should fail
+    resp = requests.get(f"{BASE_URL}/board")
+    assert resp.status_code == 400
+    print("OK: Request without identity rejected")
+
+def test_create_cards():
+    print("Testing Create Cards...")
+    # Valid card
+    payload = {"column": "Backlog", "title": "Task 1", "description": "Desc 1", "story_points": 3}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    assert resp.status_code == 201
+    card_id = resp.json()['id']
+    
+    # Card with only title
+    payload = {"column": "In Progress", "title": "Task 2"}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    assert resp.status_code == 201
+    card_id_2 = resp.json()['id']
+
+    # Invalid: No title
+    payload = {"column": "Backlog", "description": "No title"}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    assert resp.status_code == 400
+    
+    # Invalid: Wrong story points
+    payload = {"column": "Backlog", "title": "Task 3", "story_points": 4}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    assert resp.status_code == 400
+    print("OK: Card creation and validation working")
+    return card_id, card_id_2
+
+def test_get_board(card_id, card_id_2):
+    print("Testing Get Board...")
+    resp = requests.get(f"{BASE_URL}/board", headers=HEADERS)
+    assert resp.status_code == 200
+    board = resp.json()
+    assert "Backlog" in board and "In Progress" in board
+    # Verify card 1 is in Backlog
+    assert any(c['id'] == card_id for c in board['Backlog'])
+    # Verify card 2 is in In Progress
+    assert any(c['id'] == card_id_2 for c in board['In Progress'])
+    print("OK: Board retrieval working")
+
+def test_edit_and_move_card(card_id):
+    print("Testing Edit and Move Card...")
+    # Update title and move to Review
+    payload = {"title": "Updated Task 1", "status": "Review", "story_points": 5}
+    resp = requests.put(f"{BASE_URL}/cards/{card_id}", json=payload, headers=HEADERS)
+    assert resp.status_code == 200
+    assert resp.json()['title'] == "Updated Task 1"
+    assert resp.json()['status'] == "Review"
+    
+    # Verify board reflects move
+    resp = requests.get(f"{BASE_URL}/board", headers=HEADERS)
+    board = resp.json()
+    assert any(c['id'] == card_id for c in board['Review'])
+    assert not any(c['id'] == card_id for c in board['Backlog'])
+    print("OK: Card editing and moving working")
+
+def test_delete_card(card_id):
+    print("Testing Delete Card...")
+    resp = requests.delete(f"{BASE_URL}/cards/{card_id}", headers=HEADERS)
+    assert resp.status_code == 204
+    
+    resp = requests.get(f"{BASE_URL}/board", headers=HEADERS)
+    board = resp.json()
+    for col in board:
+        assert not any(c['id'] == card_id for c in board[col])
+    print("OK: Card deletion working")
+
+def test_clear_done():
+    print("Testing Clear Done...")
+    # Create a card in Done
+    payload = {"column": "Done", "title": "Done Task"}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    card_id = resp.json()['id']
+    
+    # Create a card in Backlog
+    payload = {"column": "Backlog", "title": "Backlog Task"}
+    resp = requests.post(f"{BASE_URL}/cards", json=payload, headers=HEADERS)
+    backlog_id = resp.json()['id']
+    
+    # Clear Done
+    resp = requests.delete(f"{BASE_URL}/board/done", headers=HEADERS)
+    assert resp.status_code == 204
+    
+    # Verify
+    resp = requests.get(f"{BASE_URL}/board", headers=HEADERS)
+    board = resp.json()
+    assert len(board['Done']) == 0
+    assert any(c['id'] == backlog_id for c in board['Backlog'])
+    print("OK: Clear Done working")
+
+if __name__ == "__main__":
+    try:
+        test_user_identity()
+        c1, c2 = test_create_cards()
+        test_get_board(c1, c2)
+        test_edit_and_move_card(c1)
+        test_delete_card(c2) # deleting c2
+        test_clear_done()
+        print("\nALL TESTS PASSED!")
+    except Exception as e:
+        print(f"\nTEST FAILED: {e}")
+        exit(1)