diff --git a/be/issue-tracker/src/main/java/com/issuetracker/file/util/CustomMultipartFile.java b/be/issue-tracker/src/main/java/com/issuetracker/file/util/CustomMultipartFile.java
index 21c78167c..544088bb2 100644
--- a/be/issue-tracker/src/main/java/com/issuetracker/file/util/CustomMultipartFile.java
+++ b/be/issue-tracker/src/main/java/com/issuetracker/file/util/CustomMultipartFile.java
@@ -5,12 +5,15 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import org.apache.tika.Tika;
 import org.springframework.web.multipart.MultipartFile;
 
 /**
  * byte 배열을 MultipartFile 객체로 변환하기 위한 클래스
  */
 public class CustomMultipartFile implements MultipartFile {
+    private final Tika tika = new Tika();
+
     private byte[] input;
     private String filename;
 
@@ -21,7 +24,7 @@ public CustomMultipartFile(byte[] input, String filename) {
 
     @Override
     public String getName() {
-        return null;
+        return filename;
     }
 
     @Override
@@ -31,7 +34,11 @@ public String getOriginalFilename() {
 
     @Override
     public String getContentType() {
-        return null;
+        try {
+            return tika.detect(getInputStream());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
     }
 
     @Override
diff --git a/be/issue-tracker/src/main/java/com/issuetracker/member/util/MemberMapper.java b/be/issue-tracker/src/main/java/com/issuetracker/member/util/MemberMapper.java
index d082ee382..675f96c6d 100644
--- a/be/issue-tracker/src/main/java/com/issuetracker/member/util/MemberMapper.java
+++ b/be/issue-tracker/src/main/java/com/issuetracker/member/util/MemberMapper.java
@@ -13,9 +13,9 @@ public static Member toMember(MemberCreateDto memberCreateDto) {
                 memberCreateDto.getNickname(), memberCreateDto.getEmail(), null);
     }
 
-    public static MemberCreateDto toMemberCreateDto(GithubProfile profile) {
+    public static Member toMember(GithubProfile profile, Long fileId) {
         String uuidPw = UUID.randomUUID().toString().substring(0, 12); // 깃허브로 가입한 사용자는 비밀번호를 UUID로 설정
-        return new MemberCreateDto(profile.getId(), uuidPw, profile.getNickname(), profile.getEmail());
+        return new Member(profile.getId(), uuidPw, profile.getNickname(), profile.getEmail(), fileId);
     }
 
     public static SimpleMemberDto toSimpleMemberDto(Member member, String imgUrl) {
diff --git a/be/issue-tracker/src/main/java/com/issuetracker/oauth/controller/GithubLoginController.java b/be/issue-tracker/src/main/java/com/issuetracker/oauth/controller/GithubLoginController.java
index 005e75bfc..92bb4f228 100644
--- a/be/issue-tracker/src/main/java/com/issuetracker/oauth/controller/GithubLoginController.java
+++ b/be/issue-tracker/src/main/java/com/issuetracker/oauth/controller/GithubLoginController.java
@@ -1,5 +1,6 @@
 package com.issuetracker.oauth.controller;
 
+import com.issuetracker.file.dto.UploadedFileDto;
 import com.issuetracker.file.service.FileService;
 import com.issuetracker.file.util.ImgUrlConverter;
 import com.issuetracker.member.dto.LoginResponse;
@@ -32,8 +33,8 @@ public ResponseEntity<LoginResponse> login(@RequestParam String code) throws IOE
 
         // 처음 사용자가 깃허브 로그인을 하는 것이라면 회원가입 로직을 수행한다.
         if (memberService.isNewUser(profile.getId())) {
-            memberService.create(MemberMapper.toMemberCreateDto(profile));
-            fileService.uploadFile(ImgUrlConverter.toMultipartFile(profile.getImgUrl()));
+            UploadedFileDto file = fileService.uploadFile(ImgUrlConverter.toMultipartFile(profile.getImgUrl()));
+            memberService.create(MemberMapper.toMember(profile, file.getId()));
         }
         LoginResponse loginResponse = loginService.githubLogin(profile);
         return ResponseEntity.ok().body(loginResponse);