diff --git a/build.gradle b/build.gradle
index d0cfbd2..e7e9fc7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -54,6 +54,9 @@ dependencies {
 	// OAuth 2.0
 	implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
 
+	// Actuator/Health
+	implementation("org.springframework.boot:spring-boot-starter-actuator")
+
 	// lombok
 	compileOnly 'org.projectlombok:lombok'
 	annotationProcessor 'org.projectlombok:lombok'
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index f1a80d0..74d9d3f 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -16,11 +16,11 @@ services:
     volumes:
       - ./logs:/app/logs
     healthcheck:
-      test: ["CMD-SHELL", "wget -qO- http://localhost:8080/actuator/health | grep -q 'UP' || exit 1"]
+      test: [ "CMD-SHELL", "wget -qO- http://127.0.0.1:8080/actuator/health | grep -q '\"status\":\"UP\"'" ]
       interval: 15s
       timeout: 5s
-      retries: 10
-      start_period: 30s
+      retries: 20
+      start_period: 60s
 
   redis:
     image: redis:7-alpine
diff --git a/src/main/java/com/teamEWSN/gitdeun/codereference/repository/CodeReferenceRepository.java b/src/main/java/com/teamEWSN/gitdeun/codereference/repository/CodeReferenceRepository.java
index d0d978c..92febb4 100644
--- a/src/main/java/com/teamEWSN/gitdeun/codereference/repository/CodeReferenceRepository.java
+++ b/src/main/java/com/teamEWSN/gitdeun/codereference/repository/CodeReferenceRepository.java
@@ -14,5 +14,4 @@ public interface CodeReferenceRepository extends JpaRepository<CodeReference, Lo
 
     Optional<CodeReference> findByMindmapIdAndId(Long mindmapId, Long id);
 
-    boolean existsByMindmapIdAndId(Long mindmapId, Long id);
 }
\ No newline at end of file
diff --git a/src/main/java/com/teamEWSN/gitdeun/codereference/service/CodeReferenceService.java b/src/main/java/com/teamEWSN/gitdeun/codereference/service/CodeReferenceService.java
index f664f66..db02871 100644
--- a/src/main/java/com/teamEWSN/gitdeun/codereference/service/CodeReferenceService.java
+++ b/src/main/java/com/teamEWSN/gitdeun/codereference/service/CodeReferenceService.java
@@ -127,18 +127,16 @@ public ReferenceResponse updateReference(Long mapId, Long refId, Long userId, Cr
 
     @Transactional
     public void deleteReference(Long mapId, Long refId, Long userId) {
-        // 1. 권한 확인
+        // 권한 확인
         if (!mindmapAuthService.hasEdit(mapId, userId)) {
             throw new GlobalException(ErrorCode.FORBIDDEN_ACCESS);
         }
 
-        // 2. 해당 마인드맵에 코드 참조가 존재하는지 확인
-        if (!codeReferenceRepository.existsByMindmapIdAndId(mapId, refId)) {
-            throw new GlobalException(ErrorCode.CODE_REFERENCE_NOT_FOUND);
-        }
+        CodeReference codeReference = codeReferenceRepository.findByMindmapIdAndId(mapId, refId)
+            .orElseThrow(() -> new GlobalException(ErrorCode.CODE_REFERENCE_NOT_FOUND));
 
-        // 3. 코드 참조 삭제
-        codeReferenceRepository.deleteById(refId);
+        // 코드 참조 삭제
+        codeReferenceRepository.delete(codeReference);
     }
 
     private String extractLines(String fullContent, Integer startLine, Integer endLine) {
diff --git a/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityConfig.java b/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityConfig.java
index f7db26b..a63c5a4 100644
--- a/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityConfig.java
+++ b/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityConfig.java
@@ -7,6 +7,7 @@
 import com.teamEWSN.gitdeun.common.oauth.handler.CustomOAuth2SuccessHandler;
 import com.teamEWSN.gitdeun.common.oauth.service.CustomOAuth2UserService;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
@@ -35,6 +36,9 @@ public class SecurityConfig {
   private final CustomAuthenticationEntryPoint customAuthenticationEntryPoint;
   private final CustomAccessDeniedHandler customAccessDeniedHandler;
 
+  @Value("${security.require-auth-for-unknown:true}")
+  private boolean requireAuthForUnknown;
+
   @Bean
   public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
 
@@ -53,9 +57,7 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
         .oauth2Login((oauth2) -> oauth2
             .userInfoEndpoint(userInfoEndpointConfig -> userInfoEndpointConfig
                 .userService(customOAuth2UserService))
-//                        .defaultSuccessUrl("/oauth/success") // 로그인 성공시 이동할 URL
             .successHandler(customOAuth2SuccessHandler)
-//                        .failureUrl("/oauth/fail") // 로그인 실패시 이동할 URL
             .failureHandler(customOAuthFailureHandler))
         .logout(logout -> logout
             .logoutUrl("/logout")
@@ -66,16 +68,18 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
 
     // 경로별 인가 작업
     http
-        .authorizeHttpRequests((auth) -> auth
-            // 내부 webhook 통신 API
-            .requestMatchers("/api/webhook/**").permitAll()
-            // 외부 공개 API(클라이언트 - JWT)
-            .requestMatchers(SecurityPath.ADMIN_ENDPOINTS).hasRole("ADMIN")
-            .requestMatchers(SecurityPath.USER_ENDPOINTS).hasAnyRole("USER", "ADMIN")
-            .requestMatchers(SecurityPath.PUBLIC_ENDPOINTS).permitAll()
-            .anyRequest().permitAll()
-            // .anyRequest().authenticated()
-        );
+        .authorizeHttpRequests((auth) -> {
+          auth
+              .requestMatchers(SecurityPath.ADMIN_ENDPOINTS).hasRole("ADMIN")
+              .requestMatchers(SecurityPath.USER_ENDPOINTS).hasAnyRole("USER", "ADMIN")
+              .requestMatchers(SecurityPath.PUBLIC_ENDPOINTS).permitAll();
+
+          if (requireAuthForUnknown) {
+            auth.anyRequest().authenticated();
+          } else {
+            auth.anyRequest().permitAll();
+          }
+        });
 
     // 예외 처리
     http
diff --git a/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityPath.java b/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityPath.java
index 24d0f9d..820ba05 100644
--- a/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityPath.java
+++ b/src/main/java/com/teamEWSN/gitdeun/common/config/SecurityPath.java
@@ -7,8 +7,13 @@ public class SecurityPath {
   public static final String[] PUBLIC_ENDPOINTS = {
       "/api/auth/token/refresh",
       "/api/auth/oauth/refresh/*",
+      "/oauth/logout",
       "/",
 
+      "/api/webhook/**",
+      "/actuator/health",
+      "/actuator/health/**",
+      "/actuator/info"
   };
 
   // hasRole("USER")
@@ -27,8 +32,10 @@ public class SecurityPath {
       "/api/skills/**",
       "/api/recruitments/**",
       "/api/applications/**",
+      "/api/comments/**",
+      "/api/code-reviews/**",
+      "/api/references/**",
       "/api/s3/bucket/**",
-      "/api/webhook/**"
   };
 
   // hasRole("ADMIN")
diff --git a/src/main/java/com/teamEWSN/gitdeun/common/fastapi/FastApiClient.java b/src/main/java/com/teamEWSN/gitdeun/common/fastapi/FastApiClient.java
index b9d9390..6e9b704 100644
--- a/src/main/java/com/teamEWSN/gitdeun/common/fastapi/FastApiClient.java
+++ b/src/main/java/com/teamEWSN/gitdeun/common/fastapi/FastApiClient.java
@@ -313,14 +313,13 @@ public String getFileRaw(String repoUrl, String filePath, Integer startLine, Int
     }*/
 
     public String getCodeFromNode(String nodeKey, String filePath, String authHeader) {
-        String fileName = extractFileName(filePath);
         try {
-            log.debug("FastAPI 노드 기반 코드 조회 시작 - nodeKey: {}, filePath: {}", nodeKey, fileName);
+            log.debug("FastAPI 노드 기반 코드 조회 시작 - nodeKey: {}, filePath: {}", nodeKey, filePath);
 
             UriComponentsBuilder uriBuilder = UriComponentsBuilder
                 .fromPath("/content/file/by-node") // FastAPI의 해당 엔드포인트
                 .queryParam("node_key", nodeKey)
-                .queryParam("file_path", fileName);
+                .queryParam("file_path", filePath);
             // 'prefer' 파라미터는 생략하여 FastAPI의 기본값(auto)을 따르도록 함
 
             String uri = uriBuilder.build().toUriString();
@@ -336,8 +335,8 @@ public String getCodeFromNode(String nodeKey, String filePath, String authHeader
                 .onStatus(HttpStatusCode::is4xxClientError, clientResponse ->
                     clientResponse.bodyToMono(String.class)
                         .map(errorBody -> {
-                            log.warn("FastAPI 노드 코드 조회 4xx 오류 - nodeKey: {}, fileName: {}, status: {}, body: {}",
-                                nodeKey, fileName, clientResponse.statusCode(), errorBody);
+                            log.warn("FastAPI 노드 코드 조회 4xx 오류 - nodeKey: {}, filePath: {}, status: {}, body: {}",
+                                nodeKey, filePath, clientResponse.statusCode(), errorBody);
                             return new RuntimeException("FastAPI 클라이언트 오류: " + errorBody);
                         })
                 )
@@ -346,13 +345,13 @@ public String getCodeFromNode(String nodeKey, String filePath, String authHeader
                 .block();
 
             String codeContent = (response != null) ? response.getCode() : "";
-            log.debug("FastAPI 노드 기반 코드 조회 성공 - nodeKey: {}, fileName: {}, 길이: {}",
-                nodeKey, fileName, codeContent != null ? codeContent.length() : 0);
+            log.debug("FastAPI 노드 기반 코드 조회 성공 - nodeKey: {}, filePath: {}, 길이: {}",
+                nodeKey, filePath, codeContent != null ? codeContent.length() : 0);
 
             return codeContent;
 
         } catch (Exception e) {
-            log.error("FastAPI 노드 기반 코드 조회 실패 - nodeKey: {}, fileName: {}", nodeKey, fileName, e);
+            log.error("FastAPI 노드 기반 코드 조회 실패 - nodeKey: {}, filePath: {}", nodeKey, filePath, e);
             return ""; // 예외 발생 시 빈 문자열 반환
         }
     }
@@ -365,11 +364,6 @@ private String extractMapId(String repoUrl) {
         return segments[segments.length - 1].replaceAll("\\.git$", "");
     }
 
-    // 파일명 추출
-    public String extractFileName(String filePath) {
-        return filePath.substring(filePath.lastIndexOf('/') + 1);
-    }
-
     private AnalysisResultDto buildAnalysisResultDto(
         RepoInfoResponse repoInfo
     ) {
diff --git a/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/CustomOAuth2UserService.java b/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/CustomOAuth2UserService.java
index d934856..3ebbd91 100644
--- a/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/CustomOAuth2UserService.java
+++ b/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/CustomOAuth2UserService.java
@@ -34,6 +34,7 @@
 public class CustomOAuth2UserService extends DefaultOAuth2UserService {
 
     private final GitHubApiHelper gitHubApiHelper;
+    private final GoogleApiHelper googleApiHelper;
     private final SocialTokenRefreshService socialTokenRefreshService;
     private final UserRepository userRepository;
     private final SocialConnectionRepository socialConnectionRepository;
@@ -67,7 +68,11 @@ public User processUser(OAuth2User oAuth2User, OAuth2UserRequest userRequest) {
             .map(conn -> {
                 // provider 별 refresh 정책
                 socialTokenRefreshService.refreshSocialToken(conn, accessToken, refreshToken);
-                return conn.getUser();
+
+                // 사용자 정보 갱신
+                User user = conn.getUser();
+                user.updateProfile(dto.getName(), dto.getProfileImageUrl());
+                return user;
             })
             .orElseGet(() -> createOrConnect(dto, provider, providerId, accessToken, refreshToken));
     }
@@ -79,8 +84,24 @@ private OAuth2ResponseDto getOAuth2ResponseDto(OAuth2User oAuth2User, OAuth2User
         Map<String, Object> attr = new HashMap<>(oAuth2User.getAttributes());
 
         if (registrationId.equalsIgnoreCase("google")) {
+            String accessToken = userRequest.getAccessToken().getTokenValue();
+
+            // 만료 시 토큰 리프레시 후 최신 userinfo 재조회
+            if (googleApiHelper.isExpired(accessToken)) {
+                String refreshToken = (String) userRequest.getAdditionalParameters().get("refresh_token");
+                if (refreshToken != null) {
+                    var tokenResp = googleApiHelper.refreshToken(refreshToken);
+                    accessToken = tokenResp.accessToken();
+                }
+            }
+
+            // 항상 최신 userinfo로 덮어쓰기 (이름 변경 즉시 반영)
+            Map<String, Object> latestInfo = googleApiHelper.fetchLatestUserInfo(accessToken);
+            attr.putAll(latestInfo);
+
             return new GoogleResponseDto(attr);
         }
+
         if (registrationId.equalsIgnoreCase("github")) {
             /* ① 기본 프로필에 e-mail 없으면 /user/emails 호출 */
             if (attr.get("email") == null) {
@@ -105,6 +126,7 @@ private User createOrConnect(OAuth2ResponseDto response, OauthProvider provider,
         return userRepository.findByEmailAndDeletedAtIsNull(response.getEmail())
             .map(user -> {
                 // 사용자가 존재하면, 새 소셜 계정을 연결
+                user.updateProfile(response.getName(), response.getProfileImageUrl());
                 connectSocialAccount(user, provider, providerId, accessToken, refreshToken);
                 return user;
             })
@@ -150,6 +172,7 @@ private void connectSocialAccount(User user, OauthProvider provider, String prov
             .accessToken(accessToken)
             .refreshToken(refreshToken)
             .build();
+
         socialConnectionRepository.save(connection);
     }
 
diff --git a/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/GoogleApiHelper.java b/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/GoogleApiHelper.java
index 753a0cd..d7dcfd4 100644
--- a/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/GoogleApiHelper.java
+++ b/src/main/java/com/teamEWSN/gitdeun/common/oauth/service/GoogleApiHelper.java
@@ -15,6 +15,8 @@
 import org.springframework.web.reactive.function.client.WebClientResponseException;
 import reactor.core.publisher.Mono;
 
+import java.util.Map;
+
 
 @Slf4j
 @Component
@@ -96,6 +98,26 @@ protected GoogleTokenResponse refreshToken(String refreshToken) {
         }
     }
 
+    /**
+     * access token 으로 최신 프로필(userinfo) 조회
+     * (name, picture, email 등)
+     */
+    public Map<String, Object> fetchLatestUserInfo(String accessToken) {
+        try {
+            return webClient.get()
+                .uri("https://www.googleapis.com/oauth2/v2/userinfo")
+                .header("Authorization", "Bearer " + accessToken)
+                .retrieve()
+                .bodyToMono(Map.class)
+                .block();
+        } catch (WebClientResponseException e) {
+            log.error("Google userinfo 조회 실패: {}", e.getResponseBodyAsString());
+            throw new GlobalException(ErrorCode.OAUTH_COMMUNICATION_FAILED);
+        } catch (Exception e) {
+            log.error("Google userinfo 조회 중 오류: {}", e.getMessage());
+            throw new GlobalException(ErrorCode.OAUTH_COMMUNICATION_FAILED);
+        }
+    }
 
     public Mono<Void> revokeToken(String accessToken) {
         String revokeUrl = "https://accounts.google.com/o/oauth2/revoke";
diff --git a/src/main/java/com/teamEWSN/gitdeun/mindmap/service/MindmapSseService.java b/src/main/java/com/teamEWSN/gitdeun/mindmap/service/MindmapSseService.java
index fdcad7a..a226046 100644
--- a/src/main/java/com/teamEWSN/gitdeun/mindmap/service/MindmapSseService.java
+++ b/src/main/java/com/teamEWSN/gitdeun/mindmap/service/MindmapSseService.java
@@ -1,19 +1,21 @@
 package com.teamEWSN.gitdeun.mindmap.service;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.teamEWSN.gitdeun.common.jwt.CustomUserDetails;
 import com.teamEWSN.gitdeun.mindmap.dto.MindmapDetailResponseDto;
 import com.teamEWSN.gitdeun.mindmap.dto.prompt.PromptPreviewResponseDto;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 
 import java.io.IOException;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 
 @Slf4j
@@ -22,7 +24,7 @@
 public class MindmapSseService {
 
     private final ObjectMapper objectMapper;
-
+    private final RedisTemplate<String, String> redisTemplate;
     private record SseConnection(Long userId, String nickname, String profileImage, SseEmitter emitter) {}
     private final Map<Long, List<SseConnection>> connectionsByMapId = new ConcurrentHashMap<>();
 
@@ -45,19 +47,27 @@ public SseEmitter createConnection(Long mapId, CustomUserDetails userDetails) {
 
         connectionsByMapId.computeIfAbsent(mapId, k -> new CopyOnWriteArrayList<>()).add(connection);
 
+        try {
+            // Redis Set에 현재 접속자 정보 추가
+            String redisKey = "mindmap:" + mapId + ":users";
+            String userData = objectMapper.writeValueAsString(
+                new ConnectedUserDto(userDetails.getId(), userDetails.getNickname(), userDetails.getProfileImage())
+            );
+            redisTemplate.opsForSet().add(redisKey, userData);
+
+            // Redis Set의 만료 시간을 설정하여 비정상 종료된 연결 처리
+            redisTemplate.expire(redisKey, 1, TimeUnit.HOURS);
+
+        } catch (JsonProcessingException e) {
+            log.error("사용자 정보 직렬화 실패", e);
+        }
+
         // 연결 종료 시 정리 (기존 로직 개선)
-        emitter.onCompletion(() -> {
-            removeConnection(mapId, connection);
-            broadcastUserListUpdate(mapId);
-        });
-        emitter.onTimeout(() -> {
-            removeConnection(mapId, connection);
-            broadcastUserListUpdate(mapId);
-        });
+        emitter.onCompletion(() -> removeConnection(mapId, connection));
+        emitter.onTimeout(() -> removeConnection(mapId, connection));
         emitter.onError(throwable -> {
             log.error("SSE 연결 오류 - 마인드맵 ID: {}, 사용자 ID: {}", mapId, userDetails.getId(), throwable);
             removeConnection(mapId, connection);
-            broadcastUserListUpdate(mapId);
         });
 
         // 연결 확인용 초기 메시지
@@ -158,14 +168,20 @@ private void sendToEmitter(SseEmitter emitter, Object data) {
     // 연결 종료 시 SseConnection 객체를 찾아 제거
     private void removeConnection(Long mapId, SseConnection connection) {
         List<SseConnection> connections = connectionsByMapId.get(mapId);
-        if (connections != null) {
-            connections.remove(connection);
-            log.info("SSE 연결 해제 - 마인드맵 ID: {}, 사용자 ID: {}", mapId, connection.userId());
-            if (connections.isEmpty()) {
-                connectionsByMapId.remove(mapId);
-                log.info("마인드맵 ID {} 의 모든 구독자 연결 종료", mapId);
+        if (connections != null && connections.remove(connection)) {
+            try {
+                // Redis Set에서 접속 종료한 사용자 정보 제거
+                String redisKey = "mindmap:" + mapId + ":users";
+                String userData = objectMapper.writeValueAsString(
+                    new ConnectedUserDto(connection.userId(), connection.nickname(), connection.profileImage())
+                );
+                redisTemplate.opsForSet().remove(redisKey, userData);
+
+            } catch (JsonProcessingException e) {
+                log.error("사용자 정보 직렬화 실패 (연결 종료)", e);
             }
             broadcastUserListUpdate(mapId);
+            log.info("SSE 연결 해제 및 Redis 업데이트 - 마인드맵 ID: {}, 사용자 ID: {}", mapId, connection.userId());
         }
     }
 
@@ -188,13 +204,23 @@ public record ConnectedUserDto(Long userId, String nickname, String profileImage
 
     // 현재 접속 중인 사용자 목록을 반환하는 서비스 메서드
     public List<ConnectedUserDto> getConnectedUsers(Long mapId) {
-        List<SseConnection> connections = connectionsByMapId.getOrDefault(mapId, new CopyOnWriteArrayList<>());
+        String redisKey = "mindmap:" + mapId + ":users";
+        Set<String> usersJson = redisTemplate.opsForSet().members(redisKey);
 
-        // 중복된 userId를 제거하고 DTO로 변환하여 반환 (여러 탭 접속 시 중복 방지)
-        return connections.stream()
-            .map(conn -> new ConnectedUserDto(conn.userId(), conn.nickname(), conn.profileImage()))
-            .distinct() // userId 기준으로 중복 제거
+        if (usersJson == null) {
+            return Collections.emptyList();
+        }
+
+        return usersJson.stream()
+            .map(json -> {
+                try {
+                    return objectMapper.readValue(json, ConnectedUserDto.class);
+                } catch (JsonProcessingException e) {
+                    log.error("사용자 정보 역직렬화 실패", e);
+                    return null;
+                }
+            })
+            .filter(Objects::nonNull)
             .collect(Collectors.toList());
     }
-
 }
\ No newline at end of file
diff --git a/src/main/java/com/teamEWSN/gitdeun/recruitment/controller/RecruitmentController.java b/src/main/java/com/teamEWSN/gitdeun/recruitment/controller/RecruitmentController.java
index 6c4ad01..935d173 100644
--- a/src/main/java/com/teamEWSN/gitdeun/recruitment/controller/RecruitmentController.java
+++ b/src/main/java/com/teamEWSN/gitdeun/recruitment/controller/RecruitmentController.java
@@ -5,6 +5,7 @@
 import com.teamEWSN.gitdeun.recruitment.entity.RecruitmentStatus;
 import com.teamEWSN.gitdeun.recruitment.service.RecruitmentService;
 import com.teamEWSN.gitdeun.common.jwt.CustomUserDetails;
+import com.teamEWSN.gitdeun.userskill.entity.DeveloperSkill;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Page;
@@ -85,9 +86,10 @@ public ResponseEntity<Page<RecruitmentListResponseDto>> searchRecruitments(
         @RequestParam(required = false) String keyword,
         @RequestParam(required = false) RecruitmentStatus status,
         @RequestParam(required = false) List<RecruitmentField> field,
+        @RequestParam(required = false) List<DeveloperSkill> languages,
         @PageableDefault(size = 10) Pageable pageable
     ) {
-        Page<RecruitmentListResponseDto> response = recruitmentService.searchRecruitments(keyword, status, field, pageable);
+        Page<RecruitmentListResponseDto> response = recruitmentService.searchRecruitments(keyword, status, field, languages, pageable);
         return ResponseEntity.ok(response);
     }
 
diff --git a/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentCustomRepository.java b/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentCustomRepository.java
index f17c3e4..27bf2de 100644
--- a/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentCustomRepository.java
+++ b/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentCustomRepository.java
@@ -3,6 +3,7 @@
 import com.teamEWSN.gitdeun.recruitment.entity.Recruitment;
 import com.teamEWSN.gitdeun.recruitment.entity.RecruitmentField;
 import com.teamEWSN.gitdeun.recruitment.entity.RecruitmentStatus;
+import com.teamEWSN.gitdeun.userskill.entity.DeveloperSkill;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 
@@ -13,6 +14,7 @@ Page<Recruitment> searchRecruitments(
         String keyword,
         RecruitmentStatus status,
         List<RecruitmentField> fields,
+        List<DeveloperSkill> languages,
         Pageable pageable
     );
 }
diff --git a/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentRepositoryImpl.java b/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentRepositoryImpl.java
index 06bf211..9b51bc4 100644
--- a/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentRepositoryImpl.java
+++ b/src/main/java/com/teamEWSN/gitdeun/recruitment/repository/RecruitmentRepositoryImpl.java
@@ -7,6 +7,7 @@
 import com.teamEWSN.gitdeun.recruitment.entity.Recruitment;
 import com.teamEWSN.gitdeun.recruitment.entity.RecruitmentField;
 import com.teamEWSN.gitdeun.recruitment.entity.RecruitmentStatus;
+import com.teamEWSN.gitdeun.userskill.entity.DeveloperSkill;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.Page;
@@ -33,26 +34,32 @@ public class RecruitmentRepositoryImpl implements RecruitmentCustomRepository {
 
     @Override
     public Page<Recruitment> searchRecruitments(
-        String keyword, RecruitmentStatus status, List<RecruitmentField> fields, Pageable pageable
+        String keyword, RecruitmentStatus status, List<RecruitmentField> fields, List<DeveloperSkill> languages, Pageable pageable
     ) {
         // 키워드 전처리 후 Full-Text Search 활용 여부 확인
         String processed = preprocessKeyword(keyword);
 
-        // 키워드 없으면: 키워드 조건 없이 status/fields만으로 페이지 조회
+        // 키워드 없으면: 키워드 조건 없이 status/fields/languages 으로 페이지 조회
         boolean hasKeyword = (processed != null);
-        boolean useFullTextSearch = hasKeyword && isFullTextSearchAvailable(processed);
-
         BooleanExpression keywordExpr = null;
+        boolean useFullTextSearch = false;
+
         if (hasKeyword) {
-            keywordExpr = useFullTextSearch ? titleFullTextSearch(processed)
-                : fallbackContains(processed);
+            if (processed.length() == 1) {
+                keywordExpr = titleExactMatch(processed); // 한 글자: 완전 일치 검색
+            } else {
+                useFullTextSearch = isFullTextSearchAvailable(processed);
+                keywordExpr = useFullTextSearch ? titleFullTextSearch(processed) // 두 글자 이상: FTS 또는 Contains
+                    : fallbackContains(processed);
+            }
         }
 
+
         // 엔티티 자체 데이터 조회
         // id 페이지닝
         List<Long> ids = queryFactory.select(recruitment.id).distinct()
             .from(recruitment)
-            .where(keywordExpr, statusEq(status), fieldOrFilter(fields))
+            .where(keywordExpr, statusEq(status), fieldOrFilter(fields), languageOrFilter(languages))
             .orderBy(useFullTextSearch ? scoreOrder(processed) : recruitment.id.desc())
             .offset(pageable.getOffset())
             .limit(pageable.getPageSize())
@@ -60,7 +67,7 @@ public Page<Recruitment> searchRecruitments(
 
         if (ids.isEmpty()) return Page.empty(pageable);
 
-        // 내용 로딩 + 순서 복원
+        // ID 목록으로 전체 데이터 조회
         String idCsv = ids.stream().map(String::valueOf).collect(Collectors.joining(","));
         List<Recruitment> content = queryFactory.selectFrom(recruitment)
             .where(recruitment.id.in(ids))
@@ -68,10 +75,10 @@ public Page<Recruitment> searchRecruitments(
                 "FIELD({0}, " + idCsv + ")", recruitment.id).asc())
             .fetch();
 
-        // 카운팅
+        // 전체 카운트 조회
         Long total = queryFactory.select(recruitment.id.countDistinct())
             .from(recruitment)
-            .where(keywordExpr, statusEq(status), fieldOrFilter(fields))
+            .where(keywordExpr, statusEq(status), fieldOrFilter(fields), languageOrFilter(languages))
             .fetchOne();
 
         return new PageImpl<>(content, pageable, total != null ? total : 0L);
@@ -102,12 +109,17 @@ private String preprocessKeyword(String keyword) {
         }
 
         // 길이 제한
-        if (s.length() < 2) return null;
+        if (s.isEmpty()) return null;
         if (s.length() > 30) s = s.substring(0, 30);
 
         return s;
     }
 
+    // 제목 완전 일치 검색(한글자용)
+    private BooleanExpression titleExactMatch(String keyword) {
+        return recruitment.title.eq(keyword);
+    }
+
     // Full Text Search 조건 (전처리 이후 동작)
     private boolean isFullTextSearchAvailable(String keyword) {
         if (!StringUtils.hasText(keyword)) {
@@ -190,4 +202,10 @@ private BooleanExpression fieldOrFilter(List<RecruitmentField> fields) {
             ? null
             : recruitment.fieldTags.any().in(fields);
     }
+
+    private BooleanExpression languageOrFilter(List<DeveloperSkill> languages) {
+        return CollectionUtils.isEmpty(languages)
+            ? null
+            : recruitment.languageTags.any().in(languages);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/teamEWSN/gitdeun/recruitment/service/RecruitmentService.java b/src/main/java/com/teamEWSN/gitdeun/recruitment/service/RecruitmentService.java
index bae53ce..7edb626 100644
--- a/src/main/java/com/teamEWSN/gitdeun/recruitment/service/RecruitmentService.java
+++ b/src/main/java/com/teamEWSN/gitdeun/recruitment/service/RecruitmentService.java
@@ -116,8 +116,8 @@ public RecruitmentDetailResponseDto getRecruitment(Long recruitmentId) {
      * @return 페이징 처리된 검색 결과 목록
      */
     @Transactional(readOnly = true)
-    public Page<RecruitmentListResponseDto> searchRecruitments(String keyword, RecruitmentStatus status, List<RecruitmentField> fields, Pageable pageable) {
-        return recruitmentRepository.searchRecruitments(keyword, status, fields, pageable)
+    public Page<RecruitmentListResponseDto> searchRecruitments(String keyword, RecruitmentStatus status, List<RecruitmentField> fields, List<DeveloperSkill> languages, Pageable pageable) {
+        return recruitmentRepository.searchRecruitments(keyword, status, fields, languages, pageable)
             .map(recruitmentMapper::toListResponseDto);
     }
 
diff --git a/src/main/java/com/teamEWSN/gitdeun/user/repository/UserRepository.java b/src/main/java/com/teamEWSN/gitdeun/user/repository/UserRepository.java
index 7ce92f3..6e5b186 100644
--- a/src/main/java/com/teamEWSN/gitdeun/user/repository/UserRepository.java
+++ b/src/main/java/com/teamEWSN/gitdeun/user/repository/UserRepository.java
@@ -18,7 +18,4 @@ public interface UserRepository extends JpaRepository<User, Long> {
 
     // user email로 검색
     Optional<User> findByEmailAndDeletedAtIsNull(String email);
-
-    // 닉네임으로 사용자 찾기
-    Optional<User> findByNicknameAndDeletedAtIsNull(String nickname);
 }
\ No newline at end of file
diff --git a/src/main/resources/application-dev.yml b/src/main/resources/application-dev.yml
index 37d7e1b..44336ec 100644
--- a/src/main/resources/application-dev.yml
+++ b/src/main/resources/application-dev.yml
@@ -21,7 +21,8 @@ spring:
 #          user-info-uri: https://www.googleapis.com/oauth2/v3/userinfo
 #          user-name-attribute: sub
 
-
+security:
+  require-auth-for-unknown: false
 jwt:
   access-expired: 28800  # 8시간
   refresh-expired: 86400  # 1일
diff --git a/src/main/resources/application-prod.yml b/src/main/resources/application-prod.yml
index cf65f9a..b9f0ae7 100644
--- a/src/main/resources/application-prod.yml
+++ b/src/main/resources/application-prod.yml
@@ -31,4 +31,16 @@ app:
     same-site: None
 
 fastapi:
-  base-url: http://fastapi-server:8000 # Docker 네트워크 내부에서 사용할 주소
\ No newline at end of file
+  base-url: http://172.31.47.81:8000 # Docker 네트워크 내부에서 사용할 주소
+
+security:
+  require-auth-for-unknown: false
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health,info
+  endpoint:
+    health:
+      probes:
+        enabled: true
\ No newline at end of file