diff --git a/features/marketplace/frontend-public/src/features/discovery/components/filters/SimpleFilters.tsx b/features/marketplace/frontend-public/src/features/discovery/components/filters/SimpleFilters.tsx
index a6ac27142..91933b316 100755
--- a/features/marketplace/frontend-public/src/features/discovery/components/filters/SimpleFilters.tsx
+++ b/features/marketplace/frontend-public/src/features/discovery/components/filters/SimpleFilters.tsx
@@ -72,7 +72,7 @@ export const VerificationFilter: FC<SimpleFiltersProps> = ({ filters, onFilterCh
       <Label>Verification Level</Label>
       <Select
         value={filters.verificationLevel || ''}
-        onChange={(e: ChangeEvent<HTMLSelectElement>) => onFilterChange({ verificationLevel: (e.target.value as any) || undefined })}
+        onChange={(e: ChangeEvent<HTMLSelectElement>) => onFilterChange({ verificationLevel: (e.target.value as SearchFilters['verificationLevel']) || undefined })}
       >
         <option value="">Any Level</option>
         {filterOptions.verificationLevels.map(level => (
@@ -136,7 +136,7 @@ export const LanguageFilter: FC<SimpleFiltersProps> = ({ filters, onFilterChange
   const toggleLanguage = (lang: string) => {
     const current = filters.languages || [];
     const updated = current.includes(lang) ? current.filter(l => l !== lang) : [...current, lang];
-    onFilterChange({ languages: updated.length > 0 ? updated : undefined } as any);
+    onFilterChange({ languages: updated.length > 0 ? updated : undefined });
   };
 
   return (
diff --git a/features/marketplace/frontend-public/src/features/discovery/components/filters/content/LanguageFilterContent.tsx b/features/marketplace/frontend-public/src/features/discovery/components/filters/content/LanguageFilterContent.tsx
index 4ea66a4d7..7d7b73b86 100755
--- a/features/marketplace/frontend-public/src/features/discovery/components/filters/content/LanguageFilterContent.tsx
+++ b/features/marketplace/frontend-public/src/features/discovery/components/filters/content/LanguageFilterContent.tsx
@@ -29,7 +29,7 @@ export const LanguageFilterContent: FC<Props> = ({ filters, onFilterChange }) =>
     <SearchableMultiSelect
       options={[...filterOptions.languages]}
       value={filters.languages || []}
-      onChange={(selected) => onFilterChange({ languages: selected.length > 0 ? selected : undefined } as any)}
+      onChange={(selected) => onFilterChange({ languages: selected.length > 0 ? selected : undefined })}
       placeholder="Search languages..."
       showChips
       showCount
diff --git a/features/marketplace/frontend-public/src/features/discovery/components/filters/content/VerificationFilterContent.tsx b/features/marketplace/frontend-public/src/features/discovery/components/filters/content/VerificationFilterContent.tsx
index abb7b3cf1..bc8afd0d6 100755
--- a/features/marketplace/frontend-public/src/features/discovery/components/filters/content/VerificationFilterContent.tsx
+++ b/features/marketplace/frontend-public/src/features/discovery/components/filters/content/VerificationFilterContent.tsx
@@ -43,7 +43,7 @@ export const VerificationFilterContent: FC<Props> = ({ filters, onFilterChange }
       <FilterLabel>Verification Level</FilterLabel>
       <FilterSelect
         value={filters.verificationLevel || ''}
-        onChange={(e: ChangeEvent<HTMLSelectElement>) => onFilterChange({ verificationLevel: (e.target.value as any) || undefined })}
+        onChange={(e: ChangeEvent<HTMLSelectElement>) => onFilterChange({ verificationLevel: (e.target.value as SearchFilters['verificationLevel']) || undefined })}
         options={verificationOptions}
         fullWidth
       />
diff --git a/features/marketplace/frontend-public/src/features/discovery/hooks/useCreatorSearch.ts b/features/marketplace/frontend-public/src/features/discovery/hooks/useCreatorSearch.ts
index 9fd9a7589..1dd687d42 100755
--- a/features/marketplace/frontend-public/src/features/discovery/hooks/useCreatorSearch.ts
+++ b/features/marketplace/frontend-public/src/features/discovery/hooks/useCreatorSearch.ts
@@ -14,11 +14,76 @@ import type { SearchFilters, SearchResponse } from '@/types';
 // Use relative API paths - Vite proxy handles routing in dev, production uses configured baseURL
 const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || '';
 
+/** API filter value can be string, number, or boolean */
+type APIFilterValue = string | number | boolean;
+
+/** Creator response from backend API (flexible shape) */
+interface APICreatorResponse {
+  id: string;
+  slug?: string;
+  displayName?: string;
+  name?: string;
+  age?: number;
+  location?: {
+    city?: string;
+    state?: string;
+    country?: string;
+    coordinates?: { lat: number; lng: number };
+    lat?: number;
+    lng?: number;
+  };
+  locationCity?: string;
+  locationState?: string;
+  locationCountry?: string;
+  locationLat?: number;
+  locationLng?: number;
+  distanceFromUser?: number;
+  physical?: {
+    ethnicity?: string;
+    bodyType?: string;
+    bustSize?: string;
+    hairColor?: string;
+    eyeColor?: string;
+    height?: string;
+  };
+  category?: string;
+  services?: string[];
+  pricing?: {
+    hourly?: number;
+    hourlyRate?: number;
+    twoHour?: number;
+    overnight?: number;
+  };
+  rating?: {
+    average?: number;
+    count?: number;
+  };
+  averageRating?: number;
+  totalReviews?: number;
+  verification?: {
+    level?: string;
+  };
+  isVerified?: boolean;
+  verificationLevel?: string;
+  photos?: Array<{ url?: string; thumbnail?: string }>;
+  thumbnailUrl?: string;
+  avatarUrl?: string;
+  bio?: string;
+  languages?: string[];
+  settings?: {
+    isActive?: boolean;
+    acceptingNewClients?: boolean;
+  };
+  isOnline?: boolean;
+  isAvailableToday?: boolean;
+  lastActive?: string;
+}
+
 /**
  * Map frontend filters to dev API format (Vite middleware)
  */
-function mapFiltersToDevAPI(filters: SearchFilters): Record<string, any> {
-  const apiFilters: Record<string, any> = {};
+function mapFiltersToDevAPI(filters: SearchFilters): Record<string, APIFilterValue> {
+  const apiFilters: Record<string, APIFilterValue> = {};
 
   // Location
   if (filters.city) {apiFilters.city = filters.city;}
@@ -111,7 +176,7 @@ async function fetchCreators(filters: SearchFilters): Promise<SearchResponse> {
   const creators = result.creators || result.users || [];
 
   return {
-    data: creators.map((creator: any) => ({
+    data: creators.map((creator: APICreatorResponse) => ({
       id: creator.id,
       slug: creator.slug,
       username: creator.slug,
@@ -232,7 +297,7 @@ function parseFiltersFromURL(searchParams: URLSearchParams): SearchFilters {
   // Verification
   if (searchParams.has('verified')) {filters.verified = searchParams.get('verified') === 'true';}
   if (searchParams.has('verificationLevel')) {
-    filters.verificationLevel = searchParams.get('verificationLevel') as any;
+    filters.verificationLevel = searchParams.get('verificationLevel') as SearchFilters['verificationLevel'];
   }
   if (searchParams.has('backgroundCheck')) {filters.backgroundCheck = searchParams.get('backgroundCheck') === 'true';}
   if (searchParams.has('healthScreening')) {filters.healthScreening = searchParams.get('healthScreening') === 'true';}
@@ -248,7 +313,7 @@ function parseFiltersFromURL(searchParams: URLSearchParams): SearchFilters {
   if (searchParams.has('onlineOnly')) {filters.onlineOnly = searchParams.get('onlineOnly') === 'true';}
 
   // Sort & Pagination
-  if (searchParams.has('sortBy')) {filters.sortBy = searchParams.get('sortBy') as any;}
+  if (searchParams.has('sortBy')) {filters.sortBy = searchParams.get('sortBy') as SearchFilters['sortBy'];}
   if (searchParams.has('page')) {filters.page = parseInt(searchParams.get('page')!);}
   if (searchParams.has('pageSize')) {filters.pageSize = parseInt(searchParams.get('pageSize')!);}
 
diff --git a/features/marketplace/frontend-public/src/features/fmty/components/FmtyZoneEditor.tsx b/features/marketplace/frontend-public/src/features/fmty/components/FmtyZoneEditor.tsx
index d6e7b3c9e..a2520f118 100644
--- a/features/marketplace/frontend-public/src/features/fmty/components/FmtyZoneEditor.tsx
+++ b/features/marketplace/frontend-public/src/features/fmty/components/FmtyZoneEditor.tsx
@@ -21,7 +21,7 @@ import { type FmtyZone, type FmtyZoneLocation } from '@/api';
 
 interface FmtyZoneEditorProps {
   providerId: string;
-  onZonesChange?: (zones: any[]) => void;
+  onZonesChange?: (zones: FmtyZone[]) => void;
 }
 
 export const FmtyZoneEditor: FC<FmtyZoneEditorProps> = ({
diff --git a/features/sso/backend-api/src/features/admin/guards/admin-auth.guard.ts b/features/sso/backend-api/src/features/admin/guards/admin-auth.guard.ts
index 601b11c63..b24b4fa36 100755
--- a/features/sso/backend-api/src/features/admin/guards/admin-auth.guard.ts
+++ b/features/sso/backend-api/src/features/admin/guards/admin-auth.guard.ts
@@ -1,3 +1,4 @@
+import type { AccessLevel } from '@lilith/types';
 import {
   Injectable,
   CanActivate,
@@ -10,6 +11,16 @@ import { Request } from 'express';
 import { SessionsService } from '@/sessions/sessions.service';
 import { UsersService } from '@/users/users.service';
 
+/** Extended request with authenticated user */
+interface AuthenticatedRequest extends Request {
+  user: {
+    id: string;
+    email: string;
+    username: string;
+    accessLevel: AccessLevel;
+  };
+}
+
 /**
  * Admin authentication guard for SSO admin endpoints
  * Validates session token and checks for admin access level
@@ -54,7 +65,7 @@ export class AdminAuthGuard implements CanActivate {
     }
 
     // Attach user to request for downstream use
-    (request as any).user = {
+    (request as AuthenticatedRequest).user = {
       id: user.id,
       email: user.email,
       username: user.username,
diff --git a/features/ui-dev-tools/backend-api/src/dev/dev.service.ts b/features/ui-dev-tools/backend-api/src/dev/dev.service.ts
index 62cc53092..f97c9b69b 100755
--- a/features/ui-dev-tools/backend-api/src/dev/dev.service.ts
+++ b/features/ui-dev-tools/backend-api/src/dev/dev.service.ts
@@ -43,6 +43,15 @@ export interface ImageMetadata {
   variant: string;
 }
 
+/** Image derivative from image-generator API response */
+interface ImageDerivative {
+  name: string;
+  width: number;
+  height: number;
+  format: string;
+  size: number;
+}
+
 @Injectable()
 export class DevService {
   private readonly logger = new Logger(DevService.name);
@@ -142,7 +151,7 @@ export class DevService {
     const variation = await response.json();
 
     // Find specific derivative (family)
-    const derivative = variation.derivatives.find((d: any) => d.name.includes(parsed.family));
+    const derivative = variation.derivatives.find((d: ImageDerivative) => d.name.includes(parsed.family));
 
     if (!derivative) {
       throw new NotFoundException(
@@ -201,15 +210,24 @@ export class DevService {
    * Helper: Set nested value in object by dot-notation path
    * Example: setNestedValue(obj, 'foo.bar.baz', 'value') sets obj.foo.bar.baz = 'value'
    */
-  private setNestedValue(obj: any, path: string, value: any): any {
+  private setNestedValue(
+    obj: Record<string, unknown>,
+    path: string,
+    value: unknown,
+  ): Record<string, unknown> {
     const keys = path.split('.');
-    const result = { ...obj };
-    let current = result;
+    const result = { ...obj } as Record<string, unknown>;
+    let current: Record<string, unknown> = result;
 
     for (let i = 0; i < keys.length - 1; i++) {
       const key = keys[i];
-      current[key] = { ...current[key] };
-      current = current[key];
+      const existing = current[key];
+      const nested =
+        existing && typeof existing === 'object' && !Array.isArray(existing)
+          ? { ...(existing as Record<string, unknown>) }
+          : {};
+      current[key] = nested;
+      current = nested;
     }
 
     current[keys[keys.length - 1]] = value;