diff --git a/src/web/app/pages-instructor/instructor-sessions-page/instructor-sessions-page.component.ts b/src/web/app/pages-instructor/instructor-sessions-page/instructor-sessions-page.component.ts
index 0f8813e1e17..66a8acf6519 100644
--- a/src/web/app/pages-instructor/instructor-sessions-page/instructor-sessions-page.component.ts
+++ b/src/web/app/pages-instructor/instructor-sessions-page/instructor-sessions-page.component.ts
@@ -10,6 +10,7 @@ import { CopyFromOtherSessionsModalComponent } from './copy-from-other-sessions-
 import { SessionPermanentDeletionConfirmModalComponent } from './session-permanent-deletion-confirm-modal/session-permanent-deletion-confirm-modal.component';
 import { SessionsPermanentDeletionConfirmModalComponent } from './sessions-permanent-deletion-confirm-modal/sessions-permanent-deletion-confirm-modal.component';
 import { CourseService } from '../../../services/course.service';
+import { QueryParamKeys } from '../../../types/api-const';
 import {
   Course,
   FeedbackQuestion,
@@ -120,7 +121,7 @@ export class InstructorSessionsPageComponent extends InstructorSessionModalPageC
   }
   ngOnInit(): void {
     this.route.queryParams.subscribe((queryParams: Params) => {
-      this.courseId = queryParams['courseid'];
+      this.courseId = queryParams[QueryParamKeys.COURSE_ID];
     });
 
     this.isSessionEditFormExpanded = !!this.courseId;
diff --git a/src/web/app/user-join-page.component.ts b/src/web/app/user-join-page.component.ts
index 9a8a756555d..09695d5516e 100644
--- a/src/web/app/user-join-page.component.ts
+++ b/src/web/app/user-join-page.component.ts
@@ -8,6 +8,7 @@ import { AuthService } from '../services/auth.service';
 import { CourseService } from '../services/course.service';
 import { NavigationService } from '../services/navigation.service';
 import { SimpleModalService } from '../services/simple-modal.service';
+import { QueryParamKeys } from '../types/api-const';
 import { AuthInfo, CourseJoinKeyAccess, CourseJoinKeyAccessDecision } from '../types/api-output';
 import { LoadingSpinnerDirective } from './components/loading-spinner/loading-spinner.directive';
 
@@ -37,13 +38,13 @@ export class UserJoinPageComponent implements OnInit {
   ngOnInit(): void {
     this.route.queryParams.subscribe((queryParams: Params) => {
       this.entityType = queryParams['entityType'];
-      this.key = queryParams['key'];
+      this.key = queryParams[QueryParamKeys.KEY];
 
       const nextUrl = `${globalThis.location.pathname}${globalThis.location.search.replaceAll('&', '%26')}`;
       this.authService.getAuthUser().subscribe((auth: AuthInfo) => {
         if (!auth.user) {
           this.isLoading = false;
-          this.navigationService.navigateByURL(`/web/login?nextUrl=${encodeURIComponent(nextUrl)}`);
+          this.navigationService.navigateByURL(`/web/login?${QueryParamKeys.NEXT_URL}=${encodeURIComponent(nextUrl)}`);
           return;
         }
         this.accountEmail = auth.user.accountEmail;
@@ -55,7 +56,9 @@ export class UserJoinPageComponent implements OnInit {
                 this.navigationService.navigateByURL(`/web/${this.entityType}`);
                 break;
               case CourseJoinKeyAccessDecision.SIGN_IN_REQUIRED:
-                this.navigationService.navigateByURL(`/web/login?nextUrl=${encodeURIComponent(nextUrl)}`);
+                this.navigationService.navigateByURL(
+                  `/web/login?${QueryParamKeys.NEXT_URL}=${encodeURIComponent(nextUrl)}`,
+                );
                 break;
               case CourseJoinKeyAccessDecision.VALID:
                 this.hasJoined = false;
diff --git a/src/web/services/account.service.ts b/src/web/services/account.service.ts
index f977e1ba435..ec23fe449bb 100644
--- a/src/web/services/account.service.ts
+++ b/src/web/services/account.service.ts
@@ -134,7 +134,7 @@ export class AccountService {
       paramMap['instituteid'] = queryParams.instituteId;
     }
     if (queryParams.accountId) {
-      paramMap['accountid'] = queryParams.accountId;
+      paramMap[QueryParamKeys.ACCOUNT_ID] = queryParams.accountId;
     }
     if (queryParams.status) {
       paramMap['status'] = queryParams.status;
diff --git a/src/web/services/institute.service.ts b/src/web/services/institute.service.ts
index b58e3c98823..a0028ac87b1 100644
--- a/src/web/services/institute.service.ts
+++ b/src/web/services/institute.service.ts
@@ -1,7 +1,7 @@
 import { Injectable, inject } from '@angular/core';
 import { Observable } from 'rxjs';
 import { HttpRequestService } from './http-request.service';
-import { ResourceEndpoints } from '../types/api-const';
+import { QueryParamKeys, ResourceEndpoints } from '../types/api-const';
 import { Institutes } from '../types/api-output';
 
 /**
@@ -17,6 +17,6 @@ export class InstituteService {
    * Gets the institutes for which the given account has been verified.
    */
   getVerifiedInstitutes(accountId: string): Observable<Institutes> {
-    return this.httpRequestService.get(ResourceEndpoints.INSTITUTES, { accountid: accountId });
+    return this.httpRequestService.get(ResourceEndpoints.INSTITUTES, { [QueryParamKeys.ACCOUNT_ID]: accountId });
   }
 }
diff --git a/src/web/services/instructor.service.ts b/src/web/services/instructor.service.ts
index 929d7b375e2..f31b91f466e 100644
--- a/src/web/services/instructor.service.ts
+++ b/src/web/services/instructor.service.ts
@@ -113,7 +113,7 @@ export class InstructorService {
     if ('courseId' in queryParams) {
       paramMap[QueryParamKeys.COURSE_ID] = queryParams.courseId;
     } else {
-      paramMap['userid'] = queryParams.userId;
+      paramMap[QueryParamKeys.USER_ID] = queryParams.userId;
     }
 
     return this.httpRequestService.get(ResourceEndpoints.INSTRUCTOR_PRIVILEGE, paramMap);
diff --git a/src/web/services/log.service.ts b/src/web/services/log.service.ts
index 13de14ccbf9..c5f05fac973 100644
--- a/src/web/services/log.service.ts
+++ b/src/web/services/log.service.ts
@@ -52,7 +52,7 @@ export class LogService {
     };
 
     if (queryParams.userId) {
-      paramMap['userid'] = queryParams.userId;
+      paramMap[QueryParamKeys.USER_ID] = queryParams.userId;
     }
 
     if (queryParams.sessionId) {
diff --git a/src/web/services/student.service.ts b/src/web/services/student.service.ts
index 6ac72aadfbf..74d362cd0a6 100644
--- a/src/web/services/student.service.ts
+++ b/src/web/services/student.service.ts
@@ -29,7 +29,7 @@ export class StudentService {
     const paramsMap: { [key: string]: string | string[] } = {};
 
     if (queryParams.courseIds !== undefined) {
-      paramsMap['courseid'] = queryParams.courseIds;
+      paramsMap[QueryParamKeys.COURSE_ID] = queryParams.courseIds;
     }
     if (queryParams.searchKey !== undefined) {
       paramsMap[QueryParamKeys.SEARCH_KEY] = queryParams.searchKey;