diff --git a/apps/client/src/pages/onBoarding/hooks/useOnboardingFunnel.ts b/apps/client/src/pages/onBoarding/hooks/useOnboardingFunnel.ts
index dbaceae5..6eba99c4 100644
--- a/apps/client/src/pages/onBoarding/hooks/useOnboardingFunnel.ts
+++ b/apps/client/src/pages/onBoarding/hooks/useOnboardingFunnel.ts
@@ -115,7 +115,12 @@ export function useOnboardingFunnel() {
 
     if (isFinalStep) {
       postSignData(
-        { email: userEmail, remindDefault: remindTime, fcmToken },
+        {
+          email: userEmail,
+          remindDefault: remindTime,
+          fcmToken,
+          job: selectedJob ?? '',
+        },
         {
           onSuccess: () => (window.location.href = '/'),
           onError: () => {
@@ -145,6 +150,7 @@ export function useOnboardingFunnel() {
     setStep,
     step,
     userEmail,
+    selectedJob,
   ]);
 
   const prevStep = useCallback(() => {
diff --git a/apps/client/src/shared/apis/axios.ts b/apps/client/src/shared/apis/axios.ts
index 9762b213..ee4edaca 100644
--- a/apps/client/src/shared/apis/axios.ts
+++ b/apps/client/src/shared/apis/axios.ts
@@ -33,10 +33,11 @@ export interface postSignUpRequest {
   email: string;
   remindDefault: string;
   fcmToken: string | null;
+  job: string;
 }
 
 export const postSignUp = async (responsedata: postSignUpRequest) => {
-  const { data } = await apiRequest.patch('/api/v2/auth/signup', responsedata);
+  const { data } = await apiRequest.patch('/api/v3/auth/signup', responsedata);
   return data;
 };
 
@@ -86,3 +87,12 @@ export const getJobs = async (): Promise<JobsResponse> => {
   const { data } = await apiRequest.get('/api/v3/enums/jobs');
   return data.data;
 };
+
+export interface patchUserJobRequest {
+  job: string;
+}
+
+export const patchUserJob = async (requestData: patchUserJobRequest) => {
+  const { data } = await apiRequest.patch('/api/v3/users/job', requestData);
+  return data;
+};
diff --git a/apps/client/src/shared/apis/queries.ts b/apps/client/src/shared/apis/queries.ts
index 4d2f9488..35a9fd9a 100644
--- a/apps/client/src/shared/apis/queries.ts
+++ b/apps/client/src/shared/apis/queries.ts
@@ -20,6 +20,8 @@ import {
   getGoogleProfile,
   getMyProfile,
   getJobs,
+  patchUserJob,
+  patchUserJobRequest,
 } from '@shared/apis/axios';
 import { AxiosError } from 'axios';
 import {
@@ -171,3 +173,9 @@ export const useSuspenseGetJobs = () => {
     staleTime: Infinity,
   });
 };
+
+export const usePatchUserJob = () => {
+  return useMutation({
+    mutationFn: (data: patchUserJobRequest) => patchUserJob(data),
+  });
+};
diff --git a/apps/client/src/shared/apis/setting/axiosInstance.ts b/apps/client/src/shared/apis/setting/axiosInstance.ts
index 60bb84aa..a23bedf4 100644
--- a/apps/client/src/shared/apis/setting/axiosInstance.ts
+++ b/apps/client/src/shared/apis/setting/axiosInstance.ts
@@ -27,7 +27,7 @@ apiRequest.interceptors.response.use(
 
     const noAuthNeeded = [
       '/api/v1/auth/token',
-      '/api/v2/auth/signup',
+      '/api/v3/auth/signup',
       '/api/v2/auth/google',
     ];
 
diff --git a/apps/client/src/shared/components/jobSelectionFunnel/JobSelectionFunnel.tsx b/apps/client/src/shared/components/jobSelectionFunnel/JobSelectionFunnel.tsx
index 1806dc4e..cc3ab4df 100644
--- a/apps/client/src/shared/components/jobSelectionFunnel/JobSelectionFunnel.tsx
+++ b/apps/client/src/shared/components/jobSelectionFunnel/JobSelectionFunnel.tsx
@@ -1,4 +1,5 @@
 import { Button } from '@pinback/design-system/ui';
+import { usePatchUserJob } from '@shared/apis/queries';
 import { useFunnel } from '@shared/hooks/useFunnel';
 import { useState } from 'react';
 import FunnelProgress from './FunnelProgress';
@@ -24,9 +25,14 @@ export default function JobSelectionFunnel({
 
   const [selectedJob, setSelectedJob] = useState<string | null>(null);
   const [jobShareAgree, setJobShareAgree] = useState(false);
+  const { mutateAsync: patchUserJob, isPending: isPatchUserJobPending } =
+    usePatchUserJob();
 
-  const handleNext = () => {
+  const handleNext = async () => {
     if (isLastStep) {
+      if (selectedJob) {
+        await patchUserJob({ job: selectedJob });
+      }
       onComplete?.();
       return;
     }
@@ -59,7 +65,10 @@ export default function JobSelectionFunnel({
           size="medium"
           className="w-[4.8rem]"
           onClick={handleNext}
-          isDisabled={currentStep === 'job' && (!jobShareAgree || !selectedJob)}
+          isDisabled={
+            isPatchUserJobPending ||
+            (currentStep === 'job' && (!jobShareAgree || !selectedJob))
+          }
         >
           {isLastStep ? '완료' : '다음'}
         </Button>
diff --git a/apps/extension/src/apis/axios.ts b/apps/extension/src/apis/axios.ts
index 1c3eff87..296db93e 100644
--- a/apps/extension/src/apis/axios.ts
+++ b/apps/extension/src/apis/axios.ts
@@ -1,30 +1,18 @@
-import apiRequest from "./axiosInstance";
+import apiRequest from './axiosInstance';
 export interface PostArticleRequest {
   url: string;
   categoryId: number;
   memo?: string | null;
-  remindTime?: string | null; 
+  remindTime?: string | null;
 }
 
 export const postArticle = async (data: PostArticleRequest) => {
-  const response = await apiRequest.post("/api/v1/articles", data);
-  return response.data;
-};
-
-
-export interface postSignupRequest {
-  email: string;
-  remindDefault: string
-  fcmToken: string;
-}
-
-export const postSignup = async (data: postSignupRequest) => {
-  const response = await apiRequest.post("/api/v1/auth/signup", data);
+  const response = await apiRequest.post('/api/v1/articles', data);
   return response.data;
 };
 
 export const getCategoriesExtension = async () => {
-  const response = await apiRequest.get("/api/v1/categories/extension");
+  const response = await apiRequest.get('/api/v1/categories/extension');
   return response.data;
 };
 
@@ -33,27 +21,26 @@ export interface postCategoriesRequest {
 }
 
 export const postCategories = async (data: postCategoriesRequest) => {
-  const response = await apiRequest.post("/api/v1/categories", data);
+  const response = await apiRequest.post('/api/v1/categories', data);
   return response.data;
-}
+};
 
 export const getRemindTime = async () => {
-  const now = new Date().toISOString().split(".")[0]; 
+  const now = new Date().toISOString().split('.')[0];
 
-  const response = await apiRequest.get("/api/v1/users/remind-time", {
+  const response = await apiRequest.get('/api/v1/users/remind-time', {
     params: { now },
   });
 
   return response.data;
 };
 
-
-export const getArticleSaved=async (url:string) => {
-  const response = await apiRequest.get("/api/v1/articles/saved", {
+export const getArticleSaved = async (url: string) => {
+  const response = await apiRequest.get('/api/v1/articles/saved', {
     params: { url },
   });
   return response.data;
-}
+};
 
 export interface PutArticleRequest {
   categoryId: number;
@@ -62,7 +49,10 @@ export interface PutArticleRequest {
   remindTime: string | null;
 }
 
-export const putArticle = async (articleId: number, data: PutArticleRequest) => {
+export const putArticle = async (
+  articleId: number,
+  data: PutArticleRequest
+) => {
   const response = await apiRequest.put(`/api/v1/articles/${articleId}`, data);
   return response.data;
-};
\ No newline at end of file
+};
diff --git a/apps/extension/src/apis/axiosInstance.ts b/apps/extension/src/apis/axiosInstance.ts
index d56aca0f..36c37e9d 100644
--- a/apps/extension/src/apis/axiosInstance.ts
+++ b/apps/extension/src/apis/axiosInstance.ts
@@ -36,7 +36,7 @@ apiRequest.interceptors.response.use(
 
     const noAuthNeeded = [
       '/api/v1/auth/token',
-      '/api/v2/auth/signup',
+      '/api/v3/auth/signup',
       '/api/v2/auth/google',
     ];
     const isNoAuth = noAuthNeeded.some((url) =>
diff --git a/apps/extension/src/apis/query/queries.ts b/apps/extension/src/apis/query/queries.ts
index 51983444..a0c16b7e 100644
--- a/apps/extension/src/apis/query/queries.ts
+++ b/apps/extension/src/apis/query/queries.ts
@@ -1,17 +1,15 @@
-import { useMutation, useQuery, UseQueryOptions } from '@tanstack/react-query';
 import {
+  getArticleSaved,
+  getCategoriesExtension,
+  getRemindTime,
   postArticle,
   PostArticleRequest,
-  postSignup,
-  postSignupRequest,
-  getCategoriesExtension,
   postCategories,
   postCategoriesRequest,
-  getRemindTime,
-  getArticleSaved,
   putArticle,
   PutArticleRequest,
 } from '@apis/axios';
+import { useMutation, useQuery, UseQueryOptions } from '@tanstack/react-query';
 
 export const usePostArticle = () => {
   return useMutation({
@@ -19,12 +17,6 @@ export const usePostArticle = () => {
   });
 };
 
-export const usePostSignup = () => {
-  return useMutation({
-    mutationFn: (data: postSignupRequest) => postSignup(data),
-  });
-};
-
 export const usePostCategories = () => {
   return useMutation({
     mutationFn: (data: postCategoriesRequest) => postCategories(data),