diff --git a/features/marketplace/backend-api/src/@platform/shared/utils/invitation-validator.ts b/features/marketplace/backend-api/src/@platform/shared/utils/invitation-validator.ts
index 9da8c60f0..b1a52da5c 100644
--- a/features/marketplace/backend-api/src/@platform/shared/utils/invitation-validator.ts
+++ b/features/marketplace/backend-api/src/@platform/shared/utils/invitation-validator.ts
@@ -31,8 +31,6 @@ export interface InvitationLike {
  * conflict detection, and revenue share validation.
  */
 export class InvitationValidator {
-  // Status constants that can be customized per invitation type
-  private static readonly PENDING_STATUS = 'pending';
   private static readonly EXPIRED_STATUS = 'expired';
 
   /**
diff --git a/features/marketplace/backend-api/src/billing/billing.service.ts b/features/marketplace/backend-api/src/billing/billing.service.ts
index c6284bbbf..9e5716339 100755
--- a/features/marketplace/backend-api/src/billing/billing.service.ts
+++ b/features/marketplace/backend-api/src/billing/billing.service.ts
@@ -162,7 +162,7 @@ export class BillingService {
    */
   async recordPaymentSuccess(
     subscriptionId: string,
-    transactionId: string,
+    _transactionId: string,
     newPeriodStart: Date,
     newPeriodEnd: Date,
   ): Promise<void> {
diff --git a/features/marketplace/backend-api/src/content-editing/content-editing.service.ts b/features/marketplace/backend-api/src/content-editing/content-editing.service.ts
index 65fb82993..851dc0430 100644
--- a/features/marketplace/backend-api/src/content-editing/content-editing.service.ts
+++ b/features/marketplace/backend-api/src/content-editing/content-editing.service.ts
@@ -37,7 +37,6 @@ export interface EditingSession {
 @Injectable()
 export class ContentEditingService {
   private readonly logger = new Logger(ContentEditingService.name);
-  private readonly bucketName = 'content-editing-sessions';
 
   constructor(
     @InjectRepository(EditingSessionEntity)
@@ -114,7 +113,10 @@ export class ContentEditingService {
       throw new BadRequestException(`SEO image generation failed: ${errorText}`);
     }
 
-    const seoResult = await response.json();
+    const seoResult = await response.json() as {
+      images?: Record<string, { imagePath: string; width: number; height: number; qualityScore: number }>;
+      metadata?: { prompt?: string };
+    };
 
     // Extract the requested layout from results
     const imageData = seoResult.images?.[layout];
diff --git a/features/marketplace/backend-api/src/coop/controllers/advertisement.controller.ts b/features/marketplace/backend-api/src/coop/controllers/advertisement.controller.ts
index 553f4339e..9eee0ad54 100644
--- a/features/marketplace/backend-api/src/coop/controllers/advertisement.controller.ts
+++ b/features/marketplace/backend-api/src/coop/controllers/advertisement.controller.ts
@@ -193,7 +193,7 @@ export class AdvertisementController {
   @ApiOperation({ summary: 'Decline advertisement (deny consent)' })
   @ApiResponse({ status: 204, description: 'Consent denied' })
   async decline(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) advertisementId: string,
     @Body() dto: RevokeAdvertisementDto,
     @Request() req: RequestWithProfile,
@@ -214,7 +214,7 @@ export class AdvertisementController {
   @ApiOperation({ summary: 'Revoke advertisement (IMMEDIATE)' })
   @ApiResponse({ status: 204, description: 'Advertisement revoked' })
   async revoke(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) advertisementId: string,
     @Body() dto: RevokeAdvertisementDto,
     @Request() req: RequestWithProfile,
diff --git a/features/marketplace/backend-api/src/coop/controllers/mentorship.controller.ts b/features/marketplace/backend-api/src/coop/controllers/mentorship.controller.ts
index a40bf163d..b708969fe 100644
--- a/features/marketplace/backend-api/src/coop/controllers/mentorship.controller.ts
+++ b/features/marketplace/backend-api/src/coop/controllers/mentorship.controller.ts
@@ -228,7 +228,7 @@ export class MentorshipController {
   @ApiParam({ name: 'id', description: 'Mentorship ID' })
   @ApiResponse({ status: 200, description: 'Mentorship accepted' })
   async acceptMentorship(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) mentorshipId: string,
     @Request() req: RequestWithProfile,
     @Ip() ipAddress?: string,
@@ -252,7 +252,7 @@ export class MentorshipController {
   @ApiParam({ name: 'id', description: 'Mentorship ID' })
   @ApiResponse({ status: 204, description: 'Mentorship rejected' })
   async rejectMentorship(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) mentorshipId: string,
     @Body() dto: RejectMentorshipDto,
     @Request() req: RequestWithProfile,
@@ -275,7 +275,7 @@ export class MentorshipController {
   @ApiParam({ name: 'id', description: 'Mentorship ID' })
   @ApiResponse({ status: 200, description: 'Access grants updated' })
   async updateAccessGrants(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) mentorshipId: string,
     @Body() dto: UpdateAccessGrantsBodyDto,
     @Request() req: RequestWithProfile,
@@ -301,7 +301,7 @@ export class MentorshipController {
   @ApiParam({ name: 'id', description: 'Mentorship ID' })
   @ApiResponse({ status: 204, description: 'Mentorship revoked' })
   async revokeMentorship(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) mentorshipId: string,
     @Body() dto: RevokeMentorshipDto,
     @Request() req: RequestWithProfile,
diff --git a/features/marketplace/backend-api/src/coop/controllers/session.controller.ts b/features/marketplace/backend-api/src/coop/controllers/session.controller.ts
index 43bd00137..3676b9bed 100644
--- a/features/marketplace/backend-api/src/coop/controllers/session.controller.ts
+++ b/features/marketplace/backend-api/src/coop/controllers/session.controller.ts
@@ -230,7 +230,7 @@ export class SessionController {
   @ApiOperation({ summary: 'Revoke consent (withdraw)' })
   @ApiResponse({ status: 204, description: 'Consent revoked' })
   async revokeConsent(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) sessionId: string,
     @Body() dto: CancelSessionDto,
     @Request() req: RequestWithProfile,
@@ -281,7 +281,7 @@ export class SessionController {
   @ApiOperation({ summary: 'Cancel session' })
   @ApiResponse({ status: 204, description: 'Session cancelled' })
   async cancel(
-    @Param('coopId', ParseUUIDPipe) cooperativeId: string,
+    @Param('coopId', ParseUUIDPipe) _cooperativeId: string,
     @Param('id', ParseUUIDPipe) sessionId: string,
     @Body() dto: CancelSessionDto,
     @Request() req: RequestWithProfile,
diff --git a/features/marketplace/backend-api/src/coop/services/coop-booking.service.ts b/features/marketplace/backend-api/src/coop/services/coop-booking.service.ts
index 10964bf37..0955797a1 100644
--- a/features/marketplace/backend-api/src/coop/services/coop-booking.service.ts
+++ b/features/marketplace/backend-api/src/coop/services/coop-booking.service.ts
@@ -45,8 +45,6 @@ export class CoopBookingService {
     private readonly sessionRepo: Repository<CoopSession>,
     private readonly cooperativeService: CooperativeService,
     private readonly auditService: ConsentAuditService,
-    @InjectDataSource()
-    private readonly dataSource: DataSource,
   ) {}
 
   /**
diff --git a/features/marketplace/backend-api/src/coop/services/cooperative.service.ts b/features/marketplace/backend-api/src/coop/services/cooperative.service.ts
index 9f19c4f01..a75e3a07f 100644
--- a/features/marketplace/backend-api/src/coop/services/cooperative.service.ts
+++ b/features/marketplace/backend-api/src/coop/services/cooperative.service.ts
@@ -44,8 +44,6 @@ export class CooperativeService {
     private readonly coopRepo: Repository<Cooperative>,
     @InjectRepository(CooperativeMember)
     private readonly memberRepo: Repository<CooperativeMember>,
-    @InjectRepository(ProfileAdvertisement)
-    private readonly adRepo: Repository<ProfileAdvertisement>,
     @InjectDataSource()
     private readonly dataSource: DataSource,
     private readonly auditService: ConsentAuditService,
diff --git a/features/marketplace/backend-api/src/couples/couples.controller.ts b/features/marketplace/backend-api/src/couples/couples.controller.ts
index cf35610aa..22a1cb35d 100644
--- a/features/marketplace/backend-api/src/couples/couples.controller.ts
+++ b/features/marketplace/backend-api/src/couples/couples.controller.ts
@@ -201,7 +201,7 @@ export class CouplesController {
   @UseGuards(CoupleMemberGuard)
   @HttpCode(HttpStatus.NO_CONTENT)
   async cancelInvitation(
-    @Param('id', ParseUUIDPipe) id: string,
+    @Param('id', ParseUUIDPipe) _id: string,
     @Param('inviteId', ParseUUIDPipe) inviteId: string,
     @Req() req: CoupleRequest,
   ): Promise<void> {
@@ -221,7 +221,7 @@ export class CouplesController {
   @UseGuards(CoupleMemberGuard)
   @HttpCode(HttpStatus.NO_CONTENT)
   async sendInvitationReminder(
-    @Param('id', ParseUUIDPipe) id: string,
+    @Param('id', ParseUUIDPipe) _id: string,
     @Param('inviteId', ParseUUIDPipe) inviteId: string,
     @Req() req: CoupleRequest,
   ): Promise<void> {
diff --git a/features/marketplace/backend-api/src/duos/index.ts b/features/marketplace/backend-api/src/duos/index.ts
index cf1c2d675..245451c3c 100644
--- a/features/marketplace/backend-api/src/duos/index.ts
+++ b/features/marketplace/backend-api/src/duos/index.ts
@@ -3,6 +3,5 @@ export * from './duos.service';
 export * from './duo-invitations.service';
 export * from './duo-inbox.service';
 export * from './duo-analytics.service';
-export * from './duo-safety.service';
 export * from './guards';
 export * from './dto';
diff --git a/features/marketplace/backend-api/src/health.controller.ts b/features/marketplace/backend-api/src/health.controller.ts
index 9e934bf01..3b3b940b0 100755
--- a/features/marketplace/backend-api/src/health.controller.ts
+++ b/features/marketplace/backend-api/src/health.controller.ts
@@ -27,11 +27,11 @@ export class HealthController extends BaseHealthController {
     return process.env.npm_package_version || '1.0.0';
   }
 
-  protected getEnvironment(): string {
+  protected override getEnvironment(): string {
     return process.env.NODE_ENV ?? 'development';
   }
 
-  protected async checkDependencies(): Promise<DependencyHealth[]> {
+  protected override async checkDependencies(): Promise<DependencyHealth[]> {
     return [
       await this.checkDatabase(),
       await this.checkRedis()
@@ -68,7 +68,7 @@ export class HealthController extends BaseHealthController {
     };
   }
 
-  protected getMetadata(): Record<string, unknown> {
+  protected override getMetadata(): Record<string, unknown> {
     return {
       serviceName: 'marketplace',
       port: 3001,
diff --git a/features/sso/backend-api/src/features/auth/auth-email.integration.spec.ts b/features/sso/backend-api/src/features/auth/auth-email.integration.spec.ts
index 0890e7989..283f5623a 100755
--- a/features/sso/backend-api/src/features/auth/auth-email.integration.spec.ts
+++ b/features/sso/backend-api/src/features/auth/auth-email.integration.spec.ts
@@ -19,7 +19,6 @@ describe('AuthService Email Integration', () => {
   let authService: AuthService
   let emailClient: jest.Mocked<EmailClientService>
   let usersService: jest.Mocked<UsersService>
-  let sessionsService: jest.Mocked<SessionsService>
 
   const mockUser = {
     id: 'user-123',
@@ -86,7 +85,6 @@ describe('AuthService Email Integration', () => {
     authService = module.get<AuthService>(AuthService)
     emailClient = module.get(EmailClientService)
     usersService = module.get(UsersService)
-    sessionsService = module.get(SessionsService)
   })
 
   afterEach(() => {
diff --git a/features/sso/backend-api/src/features/mfa/mfa.controller.ts b/features/sso/backend-api/src/features/mfa/mfa.controller.ts
index a427538a6..16631c9c2 100755
--- a/features/sso/backend-api/src/features/mfa/mfa.controller.ts
+++ b/features/sso/backend-api/src/features/mfa/mfa.controller.ts
@@ -153,7 +153,7 @@ export class MfaController {
   @Throttle({ default: { limit: 5, ttl: 60000 } })
   async verifyChallenge(
     @Body() dto: MfaChallengeDto,
-    @Req() req: Request,
+    @Req() _req: Request,
     @Res() res: Response,
   ): Promise<Response> {
     const pendingSession = await this.mfaService.getPendingSession(
@@ -267,7 +267,7 @@ export class MfaController {
   @Throttle({ default: { limit: 5, ttl: 60000 } })
   async useRecoveryCode(
     @Body() dto: UseRecoveryCodeDto,
-    @Req() req: Request,
+    @Req() _req: Request,
     @Res() res: Response,
   ): Promise<Response> {
     const pendingSession = await this.mfaService.getPendingSession(
diff --git a/features/sso/backend-api/src/features/mfa/mfa.integration.spec.ts b/features/sso/backend-api/src/features/mfa/mfa.integration.spec.ts
index 5ce0635b9..2166c4aa3 100755
--- a/features/sso/backend-api/src/features/mfa/mfa.integration.spec.ts
+++ b/features/sso/backend-api/src/features/mfa/mfa.integration.spec.ts
@@ -22,13 +22,6 @@ describe("MFA Service (Integration)", () => {
     passwordHash: "$2b$10$hashedpassword",
   };
 
-  const _mockSession = {
-    sessionId: "session-123",
-    userId: mockUser.id,
-    email: mockUser.email,
-    accessLevel: mockUser.accessLevel,
-  };
-
   // Mock Redis client
   const mockRedisClient = {
     connect: jest.fn().mockResolvedValue(undefined),
diff --git a/features/sso/backend-api/src/features/mfa/mfa.service.ts b/features/sso/backend-api/src/features/mfa/mfa.service.ts
index c058e4a6c..a3866d71c 100755
--- a/features/sso/backend-api/src/features/mfa/mfa.service.ts
+++ b/features/sso/backend-api/src/features/mfa/mfa.service.ts
@@ -116,7 +116,7 @@ export class MfaService implements OnModuleInit, OnModuleDestroy {
 
   // ==================== TOTP Methods ====================
 
-  async setupTotp(userId: string, email: string): Promise<TotpSetupData> {
+  async setupTotp(_userId: string, email: string): Promise<TotpSetupData> {
     const secret = authenticator.generateSecret();
     const otpauthUrl = authenticator.keyuri(email, this.issuer, secret);
     const qrCodeDataUrl = await QRCode.toDataURL(otpauthUrl);
diff --git a/features/sso/backend-api/src/features/sessions/sessions.service.spec.ts b/features/sso/backend-api/src/features/sessions/sessions.service.spec.ts
index 16011f4af..09ea69933 100755
--- a/features/sso/backend-api/src/features/sessions/sessions.service.spec.ts
+++ b/features/sso/backend-api/src/features/sessions/sessions.service.spec.ts
@@ -39,7 +39,7 @@ describe("SessionsService", () => {
           provide: ConfigService,
           useValue: {
             get: jest.fn((key: string) => {
-              const config = {
+              const config: Record<string, string> = {
                 DATABASE_REDIS_HOST: "localhost",
                 DATABASE_REDIS_PORT: "6379",
                 SESSION_TTL: "604800000", // 7 days