diff --git a/lib/rucio/common/types.py b/lib/rucio/common/types.py
index 7c38982b01..c3b0628dd8 100644
--- a/lib/rucio/common/types.py
+++ b/lib/rucio/common/types.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Any, Optional, TypedDict, Union
+from typing import Any, Callable, Optional, TypedDict, Union
 
 
 class InternalType(object):
@@ -104,6 +104,9 @@ def __init__(self, scope, vo='def', fromExternal=True):
         super(InternalScope, self).__init__(value=scope, vo=vo, fromExternal=fromExternal)
 
 
+LoggerFunction = Callable[..., Any]
+
+
 class RSEDomainLANDict(TypedDict):
     read: Optional[int]
     write: Optional[int]
diff --git a/lib/rucio/common/utils.py b/lib/rucio/common/utils.py
index 3e4e3060e4..fd513b63f5 100644
--- a/lib/rucio/common/utils.py
+++ b/lib/rucio/common/utils.py
@@ -498,7 +498,7 @@ def merkle_sha256(file) -> str:
 CHECKSUM_ALGO_DICT['merkle_sha256'] = merkle_sha256
 
 
-def bencode(obj):
+def bencode(obj) -> bytes:
     """
     Copied from the reference implementation of v2 bittorrent:
     http://bittorrent.org/beps/bep_0052_torrent_creator.py
diff --git a/lib/rucio/transfertool/bittorrent.py b/lib/rucio/transfertool/bittorrent.py
index 9c374322b9..c2b9be3291 100644
--- a/lib/rucio/transfertool/bittorrent.py
+++ b/lib/rucio/transfertool/bittorrent.py
@@ -18,6 +18,7 @@
 from os import path
 from typing import TYPE_CHECKING, Optional, Sequence, Type
 
+from rucio.common import types
 from rucio.common.config import config_get
 from rucio.common.extra import import_extras
 from rucio.common.utils import construct_torrent
@@ -27,6 +28,7 @@
 
 if TYPE_CHECKING:
     from rucio.core.rse import RseData
+    from rucio.core import transfer as transfer_core
 
 DRIVER_NAME_RSE_ATTRIBUTE = 'bittorrent_driver'
 DRIVER_CLASSES_BY_NAME: dict[str, Type[BittorrentDriver]] = {}
@@ -46,7 +48,7 @@ class BittorrentTransfertool(Transfertool):
 
     required_rse_attrs = (DRIVER_NAME_RSE_ATTRIBUTE, )
 
-    def __init__(self, external_host, logger=logging.log):
+    def __init__(self, external_host: str, logger: types.LoggerFunction = logging.log):
         super().__init__(external_host=external_host, logger=logger)
 
         self._drivers_by_rse_id = {}
@@ -55,7 +57,7 @@ def __init__(self, external_host, logger=logging.log):
         self.tracker = config_get('transfers', 'bittorrent-tracker-addr', raise_exception=False, default=None)
 
     @classmethod
-    def _pick_management_api_driver_cls(cls, rse) -> Optional[Type[BittorrentDriver]]:
+    def _pick_management_api_driver_cls(cls, rse: "RseData") -> Optional[Type[BittorrentDriver]]:
         driver_cls = DRIVER_CLASSES_BY_NAME.get(rse.attributes.get(DRIVER_NAME_RSE_ATTRIBUTE))
         if driver_cls is None:
             return None
@@ -77,7 +79,7 @@ def _driver_for_rse(self, rse: "RseData") -> Optional[BittorrentDriver]:
         return driver
 
     @staticmethod
-    def _get_torrent_meta(scope, name):
+    def _get_torrent_meta(scope: "types.InternalScope", name: str):
         meta = get_metadata(scope=scope, name=name, plugin='all')
         pieces_root = base64.b64decode(meta.get('bittorrent_pieces_root', ''))
         pieces_layers = base64.b64decode(meta.get('bittorrent_pieces_layers', ''))
@@ -85,7 +87,7 @@ def _get_torrent_meta(scope, name):
         return pieces_root, pieces_layers, piece_length
 
     @classmethod
-    def submission_builder_for_path(cls, transfer_path, logger=logging.log):
+    def submission_builder_for_path(cls, transfer_path: "list[transfer_core.DirectTransferDefinitions]", logger=logging.log):
         hop = transfer_path[0]
         if hop.rws.byte_count == 0:
             logger(logging.INFO, f"Bittorrent cannot transfer fully empty torrents. Skipping {hop}")
@@ -108,7 +110,7 @@ def submission_builder_for_path(cls, transfer_path, logger=logging.log):
 
         return [hop], TransferToolBuilder(cls, external_host='Bittorrent Transfertool')
 
-    def group_into_submit_jobs(self, transfer_paths):
+    def group_into_submit_jobs(self, transfer_paths: "Sequence[list[transfer_core.DirectTransferDefinitions]]"):
         return [{'transfers': transfer_path, 'job_params': {}} for transfer_path in transfer_paths]
 
     @staticmethod
@@ -120,7 +122,7 @@ def _connect_without_tracker(torrent_id, peers_drivers: Sequence[BittorrentDrive
         for driver in peers_drivers:
             driver.add_peers(torrent_id=torrent_id, peers=peer_addr)
 
-    def submit(self, transfers, job_params, timeout=None):
+    def submit(self, transfers: "Sequence[transfer_core.DirectTransferDefinitions]", job_params, timeout=None):
         [transfer] = transfers
         rws = transfer.rws
 
diff --git a/lib/rucio/transfertool/bittorrent_driver.py b/lib/rucio/transfertool/bittorrent_driver.py
index 15f5ee24e7..b33edac63f 100644
--- a/lib/rucio/transfertool/bittorrent_driver.py
+++ b/lib/rucio/transfertool/bittorrent_driver.py
@@ -18,7 +18,10 @@
 from typing import TYPE_CHECKING, Sequence
 
 if TYPE_CHECKING:
+    from typing import Optional
+
     from rucio.core.rse import RseData
+    from rucio.transfertool.transfertool import TransferStatusReport
 
 
 class BittorrentDriver(metaclass=ABCMeta):
@@ -27,7 +30,7 @@ class BittorrentDriver(metaclass=ABCMeta):
 
     @classmethod
     @abstractmethod
-    def make_driver(cls, rse: "RseData", logger=logging.log):
+    def make_driver(cls, rse: "RseData", logger=logging.log) -> "Optional[BittorrentDriver]":
         pass
 
     @abstractmethod
@@ -39,7 +42,7 @@ def management_addr(self) -> tuple[str, int]:
         pass
 
     @abstractmethod
-    def add_torrent(self, file_name: str, file_content: bytes, download_location: str, seed_mode: bool = False):
+    def add_torrent(self, file_name: str, file_content: bytes, download_location: str, seed_mode: bool = False) -> None:
         pass
 
     @abstractmethod
@@ -47,5 +50,5 @@ def add_peers(self, torrent_id: str, peers: Sequence[tuple[str, int]]):
         pass
 
     @abstractmethod
-    def get_status(self, request_id: str, torrent_id: str):
+    def get_status(self, request_id: str, torrent_id: str) -> "TransferStatusReport":
         pass
diff --git a/lib/rucio/transfertool/bittorrent_driver_qbittorrent.py b/lib/rucio/transfertool/bittorrent_driver_qbittorrent.py
index f81d9607b6..2e5c9fe60a 100644
--- a/lib/rucio/transfertool/bittorrent_driver_qbittorrent.py
+++ b/lib/rucio/transfertool/bittorrent_driver_qbittorrent.py
@@ -19,6 +19,7 @@
 
 import qbittorrentapi
 
+from rucio.common import types
 from rucio.common.config import get_rse_credentials
 from rucio.common.utils import resolve_ip
 from rucio.core.oidc import request_token
@@ -27,6 +28,7 @@
 from .bittorrent_driver import BittorrentDriver
 
 if TYPE_CHECKING:
+    from sqlalchemy.orm import Session
     from rucio.core.rse import RseData
 
 
@@ -37,7 +39,7 @@ class QBittorrentTransferStatusReport(TransferStatusReport):
         'external_id',
     ]
 
-    def __init__(self, request_id, external_id, qbittorrent_response: Optional[qbittorrentapi.TorrentDictionary]):
+    def __init__(self, request_id: str, external_id: str, qbittorrent_response: Optional[qbittorrentapi.TorrentDictionary]):
         super().__init__(request_id)
 
         if qbittorrent_response and qbittorrent_response.state_enum.is_complete == 1:
@@ -50,10 +52,10 @@ def __init__(self, request_id, external_id, qbittorrent_response: Optional[qbitt
         if new_state in [RequestState.FAILED, RequestState.DONE]:
             self.external_id = external_id
 
-    def initialize(self, session, logger=logging.log):
+    def initialize(self, session: "Session", logger: types.LoggerFunction = logging.log) -> None:
         pass
 
-    def get_monitor_msg_fields(self, session, logger=logging.log):
+    def get_monitor_msg_fields(self, session: "Session", logger: types.LoggerFunction = logging.log):
         return {'protocol': 'qbittorrent'}
 
 
@@ -63,7 +65,7 @@ class QBittorrentDriver(BittorrentDriver):
     required_rse_attrs = ('qbittorrent_management_address', )
 
     @classmethod
-    def make_driver(cls, rse: "RseData", logger=logging.log):
+    def make_driver(cls, rse: "RseData", logger=logging.log) -> "Optional[BittorrentDriver]":
 
         address = rse.attributes.get('qbittorrent_management_address')
         if not address:
@@ -91,7 +93,7 @@ def make_driver(cls, rse: "RseData", logger=logging.log):
             logger=logger,
         )
 
-    def __init__(self, address, username, password, token=None, logger=logging.log):
+    def __init__(self, address: str, username: str, password: str, token: Optional[str] = None, logger: types.LoggerFunction = logging.log):
         extra_headers = None
         if token:
             extra_headers = {'Authorization': 'Bearer ' + token}
@@ -114,7 +116,7 @@ def listen_addr(self) -> tuple[str, int]:
     def management_addr(self) -> tuple[str, int]:
         return self.client.host, self.client.port
 
-    def add_torrent(self, file_name: str, file_content: bytes, download_location: str, seed_mode: bool = False):
+    def add_torrent(self, file_name: str, file_content: bytes, download_location: str, seed_mode: bool = False) -> None:
         self.client.torrents_add(
             rename=file_name,
             torrent_files=file_content,
@@ -123,9 +125,9 @@ def add_torrent(self, file_name: str, file_content: bytes, download_location: st
             is_sequential_download=True,
         )
 
-    def add_peers(self, torrent_id: str, peers: Sequence[tuple[str, int]]):
+    def add_peers(self, torrent_id: str, peers: Sequence[tuple[str, int]]) -> None:
         self.client.torrents_add_peers(torrent_hashes=[torrent_id], peers=[f'{ip}:{port}' for ip, port in peers])
 
-    def get_status(self, request_id: str, torrent_id: str):
+    def get_status(self, request_id: str, torrent_id: str) -> TransferStatusReport:
         info = self.client.torrents_info(torrent_hashes=[torrent_id])
         return QBittorrentTransferStatusReport(request_id, external_id=torrent_id, qbittorrent_response=info[0] if info else None)