diff --git a/iceoryx2-ffi/cxx/include/iox2/config.hpp b/iceoryx2-ffi/cxx/include/iox2/config.hpp
index 8e7729abb..b16a00c86 100644
--- a/iceoryx2-ffi/cxx/include/iox2/config.hpp
+++ b/iceoryx2-ffi/cxx/include/iox2/config.hpp
@@ -22,6 +22,7 @@
 
 namespace iox2 {
 class Config;
+class NodeBuilder;
 
 namespace config {
 class Global;
@@ -289,6 +290,7 @@ class Config {
   private:
     friend class ConfigView;
     friend class config::Global;
+    friend class NodeBuilder;
     explicit Config(iox2_config_h handle);
     void drop();
 
diff --git a/iceoryx2-ffi/cxx/src/node.cpp b/iceoryx2-ffi/cxx/src/node.cpp
index 1d619eb68..30f181170 100644
--- a/iceoryx2-ffi/cxx/src/node.cpp
+++ b/iceoryx2-ffi/cxx/src/node.cpp
@@ -137,7 +137,8 @@ auto NodeBuilder::create() const&& -> iox::expected<Node<T>, NodeCreationFailure
     }
 
     if (m_config.has_value()) {
-        IOX_TODO();
+        auto* config_handle_ref = iox2_cast_config_ref_h(m_config.value().m_handle);
+        iox2_node_builder_set_config(handle_ref, config_handle_ref);
     }
 
     iox2_node_h node_handle {};
diff --git a/iceoryx2-ffi/ffi/src/api/config.rs b/iceoryx2-ffi/ffi/src/api/config.rs
index 522303661..0faa66c8f 100644
--- a/iceoryx2-ffi/ffi/src/api/config.rs
+++ b/iceoryx2-ffi/ffi/src/api/config.rs
@@ -67,7 +67,7 @@ pub type iox2_config_ptr = *const Config;
 pub type iox2_config_mut_ptr = *mut Config;
 
 pub(super) struct ConfigOwner {
-    value: ManuallyDrop<Config>,
+    pub(crate) value: ManuallyDrop<Config>,
 }
 
 /// A storage object that has the size to store a config
@@ -81,7 +81,7 @@ pub struct iox2_config_storage_t {
 #[repr(C)]
 #[iceoryx2_ffi(ConfigOwner)]
 pub struct iox2_config_t {
-    value: iox2_config_storage_t,
+    pub(crate) value: iox2_config_storage_t,
     deleter: fn(*mut iox2_config_t),
 }
 
diff --git a/iceoryx2-ffi/ffi/src/api/node_builder.rs b/iceoryx2-ffi/ffi/src/api/node_builder.rs
index 71e297a9b..e00fd186e 100644
--- a/iceoryx2-ffi/ffi/src/api/node_builder.rs
+++ b/iceoryx2-ffi/ffi/src/api/node_builder.rs
@@ -16,6 +16,7 @@ use crate::api::{
     iox2_node_h, iox2_node_name_ptr, iox2_node_t, iox2_service_type_e, HandleToType, IntoCInt,
     NodeUnion, IOX2_OK,
 };
+use crate::iox2_config_ref_h;
 
 use iceoryx2::node::NodeCreationFailure;
 use iceoryx2::prelude::*;
@@ -169,14 +170,29 @@ pub unsafe extern "C" fn iox2_node_builder_set_name(
     IOX2_OK
 }
 
+/// Sets the node config for the builder
+///
+/// Returns IOX2_OK
+///
+/// # Safety
+///
+/// * `node_builder_handle` - Must be a valid [`iox2_node_builder_ref_h`] obtained by [`iox2_node_builder_new`] and casted by [`iox2_cast_node_builder_ref_h`].
+/// * `config_handle` - Must be a valid [`iox2_config_ref_h`]
+///
 #[no_mangle]
-pub extern "C" fn iox2_node_builder_set_config(
+pub unsafe extern "C" fn iox2_node_builder_set_config(
     node_builder_handle: iox2_node_builder_ref_h,
-) -> c_int {
+    config_handle: iox2_config_ref_h,
+) {
     debug_assert!(!node_builder_handle.is_null());
-    todo!() // TODO: [#210] implement
+    debug_assert!(!config_handle.is_null());
+
+    let node_builder_struct = &mut *node_builder_handle.as_type();
+    let config = &*config_handle.as_type();
 
-    // IOX2_OK
+    let node_builder = node_builder_struct.take().unwrap();
+    let node_builder = node_builder.config(&*config.value.as_ref().value);
+    node_builder_struct.set(node_builder);
 }
 
 // intentionally not public API