diff --git a/backend/src/db/seed.js b/backend/src/db/seed.js
index 04f7f7bdb..32a20145b 100644
--- a/backend/src/db/seed.js
+++ b/backend/src/db/seed.js
@@ -933,253 +933,326 @@ const languages = ['de', 'en', 'es', 'fr', 'it', 'pt', 'pl']
       trollingComment.update({ disabled: true, updatedAt: new Date().toISOString(), closed: true }),
     ])
 
-    await Factory.buildList('user', 30)
+    await Promise.all([...Array(30).keys()].map(() => Factory.build('user')))
 
-    await Factory.buildList(
-      'post',
-      30,
-      {
-        image: faker.image.unsplash.objects(),
-      },
-      {
-        categoryIds: ['cat1'],
-        author: jennyRostock,
-      },
+    await Promise.all(
+      [...Array(30).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.objects(),
+          },
+          {
+            categoryIds: ['cat1'],
+            author: jennyRostock,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      6,
-      {},
-      {
-        author: jennyRostock,
-        postId: 'p2',
-      },
+    await Promise.all(
+      [...Array(6).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: jennyRostock,
+            postId: 'p2',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      4,
-      {},
-      {
-        author: jennyRostock,
-        postId: 'p15',
-      },
+    await Promise.all(
+      [...Array(4).keys()].map(() =>
+        Factory.build(
+          'comment',
+          4,
+          {},
+          {
+            author: jennyRostock,
+            postId: 'p15',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      2,
-      {},
-      {
-        author: jennyRostock,
-        postId: 'p4',
-      },
+    await Promise.all(
+      [...Array(2).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: jennyRostock,
+            postId: 'p4',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'post',
-      21,
-      {
-        image: faker.image.unsplash.buildings(),
-      },
-      {
-        author: peterLustig,
-      },
+    await Promise.all(
+      [...Array(21).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.buildings(),
+          },
+          {
+            author: peterLustig,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      3,
-      {},
-      {
-        author: peterLustig,
-        postId: 'p4',
-      },
+    await Promise.all(
+      [...Array(3).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: peterLustig,
+            postId: 'p4',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      5,
-      {},
-      {
-        author: peterLustig,
-        postId: 'p14',
-      },
+    await Promise.all(
+      [...Array(3).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: peterLustig,
+            postId: 'p14',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      6,
-      {},
-      {
-        author: peterLustig,
-        postId: 'p0',
-      },
+    await Promise.all(
+      [...Array(6).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: peterLustig,
+            postId: 'p0',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'post',
-      11,
-      {
-        image: faker.image.unsplash.food(),
-      },
-      {
-        author: dewey,
-      },
+    await Promise.all(
+      [...Array(11).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.food(),
+          },
+          {
+            author: dewey,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      7,
-      {},
-      {
-        author: dewey,
-        postId: 'p2',
-      },
+    await Promise.all(
+      [...Array(7).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: dewey,
+            postId: 'p2',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      5,
-      {},
-      {
-        author: dewey,
-        postId: 'p6',
-      },
+    await Promise.all(
+      [...Array(5).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: dewey,
+            postId: 'p6',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      2,
-      {},
-      {
-        author: dewey,
-        postId: 'p9',
-      },
+    await Promise.all(
+      [...Array(2).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: dewey,
+            postId: 'p9',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'post',
-      16,
-      {
-        image: faker.image.unsplash.technology(),
-      },
-      {
-        author: louie,
-      },
+    await Promise.all(
+      [...Array(16).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.technology(),
+          },
+          {
+            author: louie,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      4,
-      {},
-      {
-        postId: 'p1',
-        author: louie,
-      },
+    await Promise.all(
+      [...Array(4).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            postId: 'p1',
+            author: louie,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      8,
-      {},
-      {
-        author: louie,
-        postId: 'p10',
-      },
+    await Promise.all(
+      [...Array(8).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: louie,
+            postId: 'p10',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      5,
-      {},
-      {
-        author: louie,
-        postId: 'p13',
-      },
+    await Promise.all(
+      [...Array(5).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: louie,
+            postId: 'p13',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'post',
-      45,
-      {
-        image: faker.image.unsplash.people(),
-      },
-      {
-        author: bobDerBaumeister,
-      },
+    await Promise.all(
+      [...Array(45).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.people(),
+          },
+          {
+            author: bobDerBaumeister,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      2,
-      {},
-      {
-        author: bobDerBaumeister,
-        postId: 'p2',
-      },
+    await Promise.all(
+      [...Array(2).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: bobDerBaumeister,
+            postId: 'p2',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      3,
-      {},
-      {
-        author: bobDerBaumeister,
-        postId: 'p12',
-      },
+    await Promise.all(
+      [...Array(3).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: bobDerBaumeister,
+            postId: 'p12',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      7,
-      {},
-      {
-        author: bobDerBaumeister,
-        postId: 'p13',
-      },
+    await Promise.all(
+      [...Array(7).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: bobDerBaumeister,
+            postId: 'p13',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'post',
-      8,
-      {
-        image: faker.image.unsplash.nature(),
-      },
-      {
-        author: huey,
-      },
+    await Promise.all(
+      [...Array(8).keys()].map(() =>
+        Factory.build(
+          'post',
+          {
+            image: faker.image.unsplash.nature(),
+          },
+          {
+            author: huey,
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      6,
-      {},
-      {
-        author: huey,
-        postId: 'p0',
-      },
+    await Promise.all(
+      [...Array(6).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: huey,
+            postId: 'p0',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      8,
-      {},
-      {
-        author: huey,
-        postId: 'p13',
-      },
+    await Promise.all(
+      [...Array(8).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: huey,
+            postId: 'p13',
+          },
+        ),
+      ),
     )
 
-    await Factory.buildList(
-      'comment',
-      9,
-      {},
-      {
-        author: huey,
-        postId: 'p15',
-      },
+    await Promise.all(
+      [...Array(8).keys()].map(() =>
+        Factory.build(
+          'comment',
+          {},
+          {
+            author: huey,
+            postId: 'p15',
+          },
+        ),
+      ),
     )
 
     await Factory.build('donations')