diff --git a/apps/backend/src/customTypes/index.d.ts b/apps/backend/src/customTypes/index.d.ts
index 66322d7c4d..7b4a2ead3e 100644
--- a/apps/backend/src/customTypes/index.d.ts
+++ b/apps/backend/src/customTypes/index.d.ts
@@ -34,6 +34,18 @@ declare module 'knex' {
         query: string,
         userInput: string
       ): QueryBuilder;
+
+      whereJsonFieldLikeEscaped(
+        column: string, 
+        field: string,
+        userInput: string
+      ) : QueryBuilder;
+
+      orWhereJsonFieldLikeEscaped(
+        column: string, 
+        field: string,
+        userInput: string
+      ) : QueryBuilder;
     }
   }
 }
diff --git a/apps/backend/src/datasources/postgres/ProposalDataSource.ts b/apps/backend/src/datasources/postgres/ProposalDataSource.ts
index 42af7bc8d3..e1609b21f0 100644
--- a/apps/backend/src/datasources/postgres/ProposalDataSource.ts
+++ b/apps/backend/src/datasources/postgres/ProposalDataSource.ts
@@ -377,11 +377,6 @@ export default class PostgresProposalDataSource implements ProposalDataSource {
     return query;
   }
 
-  safeEscapeRegexExpression(expression: string): string {
-    const escaped = expression.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-
-    return escaped;
-  }
   async getProposalsFromView(
     filter?: ProposalsFilter,
     first?: number,
@@ -442,10 +437,6 @@ export default class PostgresProposalDataSource implements ProposalDataSource {
           searchText !== null &&
           searchText !== undefined
         ) {
-          const regexLiteral = this.safeEscapeRegexExpression(searchText);
-          // NOTE: Using jsonpath we check the jsonb (instruments) field if it contains object with name equal to searchText case insensitive
-          const jsonPathPattern = `$[*] ? (@.name.type() == "string" && @.name like_regex "${regexLiteral}" flag "i")`;
-
           query.andWhere((qb) =>
             qb
               .orWhereRaw('proposal_id ILIKE ?', [`%${searchText}%`])
@@ -455,9 +446,11 @@ export default class PostgresProposalDataSource implements ProposalDataSource {
               .orWhere('users.firstname', 'ilike', `%${searchText}%`)
               .orWhere('users.lastname', 'ilike', `%${searchText}%`)
               .orWhere('principal_investigator', 'in', principalInvestigator)
-              .orWhereRaw('jsonb_path_exists(instruments, ?)', [
-                jsonPathPattern,
-              ])
+              .orWhereJsonFieldLikeEscaped(
+                'instruments',
+                'name',
+                `${searchText}`
+              )
           );
         }
 
@@ -634,10 +627,10 @@ export default class PostgresProposalDataSource implements ProposalDataSource {
               .orWhereRaw('users.email ILIKE ?', `%${filter.text}%`)
               .orWhereRaw('users.firstname ILIKE ?', `%${filter.text}%`)
               .orWhereRaw('users.lastname ILIKE ?', `%${filter.text}%`)
-              // NOTE: Using jsonpath we check the jsonb (instruments) field if it contains object with name equal to searchText case insensitive
-              .orWhereRaw(
-                'jsonb_path_exists(instruments, \'$[*].name \\? (@.type() == "string" && @ like_regex :searchText: flag "i")\')',
-                { searchText: filter.text }
+              .orWhereJsonFieldLikeEscaped(
+                'instruments',
+                'name',
+                `${filter.text}`
               )
           );
         }
diff --git a/apps/backend/src/datasources/postgres/databaseExtensions.ts b/apps/backend/src/datasources/postgres/databaseExtensions.ts
index b4c3d8990c..2957a1ebc9 100644
--- a/apps/backend/src/datasources/postgres/databaseExtensions.ts
+++ b/apps/backend/src/datasources/postgres/databaseExtensions.ts
@@ -3,6 +3,10 @@ import Knex from 'knex';
 const escapeLike = (s: string) =>
   s.replace(/\\/g, '\\\\').replace(/[%_]/g, '\\$&');
 
+function safeJsonPath(input: string): string {
+  return input.replace(/[.*+?^${}()|[\]\\"]/g, '\\$&').trim();
+}
+
 const addExtensions = () => {
   // Add the custom methods
   Knex.QueryBuilder.extend(
@@ -23,6 +27,24 @@ const addExtensions = () => {
       return this.orWhereILike(column, finalQuery);
     }
   );
+  Knex.QueryBuilder.extend(
+    'whereJsonFieldLikeEscaped',
+    function (column: string, field: string, userInput: string) {
+      const escapedInput = safeJsonPath(userInput);
+      const jsonPath = `$[*].${field}? (@ like_regex "${escapedInput}" flag "i")`;
+
+      return this.whereRaw('jsonb_path_exists(??, ?)', [column, jsonPath]);
+    }
+  );
+  Knex.QueryBuilder.extend(
+    'orWhereJsonFieldLikeEscaped',
+    function (column: string, field: string, userInput: string) {
+      const escapedInput = safeJsonPath(userInput);
+      const jsonPath = `$[*].${field}? (@ like_regex "${escapedInput}" flag "i")`;
+
+      return this.orWhereRaw('jsonb_path_exists(??, ?)', [column, jsonPath]);
+    }
+  );
 };
 
 export default addExtensions;
diff --git a/apps/backend/src/datasources/stfc/StfcProposalDataSource.ts b/apps/backend/src/datasources/stfc/StfcProposalDataSource.ts
index 298292001e..0303aa7b6e 100644
--- a/apps/backend/src/datasources/stfc/StfcProposalDataSource.ts
+++ b/apps/backend/src/datasources/stfc/StfcProposalDataSource.ts
@@ -129,10 +129,10 @@ export default class StfcProposalDataSource extends PostgresProposalDataSource {
               .orWhere('users.firstname', 'ilike', `%${filter.text}%`)
               .orWhere('users.lastname', 'ilike', `%${filter.text}%`)
               .orWhere('principal_investigator', 'in', stfcUserIds)
-              // NOTE: Using jsonpath we check the jsonb (instruments) field if it contains object with name equal to searchText case insensitive
-              .orWhereRaw(
-                'jsonb_path_exists(instruments, \'$[*].name \\? (@.type() == "string" && @ like_regex :searchText: flag "i")\')',
-                { searchText: filter.text }
+              .orWhereJsonFieldLikeEscaped(
+                'instruments',
+                'name',
+                `${filter.text}`
               );
           });
         }