diff --git a/backend/src/api/controllers/result.ts b/backend/src/api/controllers/result.ts
index 4e7cacdaaf2b..bfaf6285a7b1 100644
--- a/backend/src/api/controllers/result.ts
+++ b/backend/src/api/controllers/result.ts
@@ -64,6 +64,7 @@ import { MonkeyRequest } from "../types";
 import { getFunbox, checkCompatibility } from "@monkeytype/funbox";
 import { tryCatch } from "@monkeytype/util/trycatch";
 import { getCachedConfiguration } from "../../init/configuration";
+import { allTimeLeaderboardCache } from "../../utils/all-time-leaderboard-cache";
 
 try {
   if (!anticheatImplemented()) throw new Error("undefined");
@@ -534,6 +535,9 @@ export async function addResult(
       },
       dailyLeaderboardsConfig,
     );
+
+      allTimeLeaderboardCache.clear();
+
     if (
       dailyLeaderboardRank >= 1 &&
       dailyLeaderboardRank <= 10 &&
diff --git a/backend/src/api/controllers/user.ts b/backend/src/api/controllers/user.ts
index 964602852f10..9437c85c3476 100644
--- a/backend/src/api/controllers/user.ts
+++ b/backend/src/api/controllers/user.ts
@@ -4,6 +4,7 @@ import MonkeyError, {
   isFirebaseError,
 } from "../../utils/error";
 import { MonkeyResponse } from "../../utils/monkey-response";
+import { getCached, setCached, invalidateUserCache } from "../../utils/cache";
 import * as DiscordUtils from "../../utils/discord";
 import {
   buildAgentLog,
@@ -914,6 +915,10 @@ export async function getProfile(
 ): Promise<GetProfileResponse> {
   const { uidOrName } = req.params;
 
+  const cacheKey = `user:profile:${uidOrName}`;
+  const cached = await getCached<GetProfileResponse>(cacheKey);
+  if (cached !== null) return cached;
+
   const user = req.query.isUid
     ? await UserDAL.getUser(uidOrName, "get user profile")
     : await UserDAL.getUserByName(uidOrName, "get user profile");
@@ -987,7 +992,11 @@ export async function getProfile(
   };
 
   if (banned) {
-    return new MonkeyResponse("Profile retrived: banned user", baseProfile);
+    await setCached(
+      cacheKey,
+      new MonkeyResponse("Profile retrieved: banned user", baseProfile),
+    );
+    return new MonkeyResponse("Profile retrieved: banned user", baseProfile);
   }
 
   const allTimeLbs = await getAllTimeLbs(user.uid);
@@ -1005,6 +1014,10 @@ export async function getProfile(
   } else {
     delete profileData.testActivity;
   }
+  await setCached(
+    cacheKey,
+    new MonkeyResponse("Profile retrieved", profileData),
+  );
   return new MonkeyResponse("Profile retrieved", profileData);
 }
 
@@ -1050,7 +1063,7 @@ export async function updateProfile(
   };
 
   await UserDAL.updateProfile(uid, profileDetailsUpdates, user.inventory);
-
+  await invalidateUserCache(uid);
   return new MonkeyResponse("Profile updated", profileDetailsUpdates);
 }
 
diff --git a/backend/src/dal/leaderboards.ts b/backend/src/dal/leaderboards.ts
index f2a48658f6af..decc677004f5 100644
--- a/backend/src/dal/leaderboards.ts
+++ b/backend/src/dal/leaderboards.ts
@@ -393,8 +393,7 @@ async function createIndex(
       Logger.warning(`Index ${key} not matching, dropping and recreating...`);
 
       const existingIndex = (await getUsersCollection().listIndexes().toArray())
-        // oxlint-disable-next-line no-unsafe-member-access
-        .map((it) => it.name as string)
+        .map((it: unknown) => (it as { name: string }).name)
         .find((it) => it.startsWith(key));
 
       if (existingIndex !== undefined && existingIndex !== null) {
diff --git a/backend/src/utils/all-time-leaderboard-cache.ts b/backend/src/utils/all-time-leaderboard-cache.ts
new file mode 100644
index 000000000000..aa822f187153
--- /dev/null
+++ b/backend/src/utils/all-time-leaderboard-cache.ts
@@ -0,0 +1,34 @@
+type AllTimeCacheKey = {
+  mode: string;
+  language: string;
+  mode2: string;
+};
+
+type CacheEntry = {
+  data: unknown[];
+  count: number;
+};
+
+class AllTimeLeaderboardCache {
+  private cache = new Map<string, CacheEntry>();
+
+  private getKey({ mode, language, mode2 }: AllTimeCacheKey): string {
+    return `alltime-lb:${mode}:${language}:${mode2}`;
+  }
+
+  get(key: AllTimeCacheKey): CacheEntry | null {
+    const cacheKey = this.getKey(key);
+    const entry = this.cache.get(cacheKey);
+    return entry ?? null;
+  }
+
+  set(key: AllTimeCacheKey, data: unknown[], count: number): void {
+    this.cache.set(this.getKey(key), { data, count });
+  }
+
+  clear(): void {
+    this.cache.clear();
+  }
+}
+
+export const allTimeLeaderboardCache = new AllTimeLeaderboardCache();
\ No newline at end of file
diff --git a/backend/src/utils/cache.ts b/backend/src/utils/cache.ts
new file mode 100644
index 000000000000..268c96a87d5a
--- /dev/null
+++ b/backend/src/utils/cache.ts
@@ -0,0 +1,42 @@
+import { getConnection } from "../init/redis";
+
+const CACHE_PREFIX = "cache:";
+const TTL = 300; // == 5 minutes
+
+export async function getCached<T>(key: string): Promise<T | null> {
+  const redis = getConnection();
+  if (!redis) return null;
+
+  try {
+    const data = await redis.get(`${CACHE_PREFIX}${key}`);
+    if (data === null || data === undefined || data === "") return null;
+    return JSON.parse(data) as T;
+  } catch {
+    return null;
+  }
+}
+
+export async function setCached<T>(key: string, data: T): Promise<void> {
+  const redis = getConnection();
+  if (!redis) return;
+
+  try {
+    await redis.setex(`${CACHE_PREFIX}${key}`, TTL, JSON.stringify(data));
+  } catch (err) {
+    console.error("Cache set failed:", err);
+  }
+}
+
+export async function invalidateUserCache(userId: string): Promise<void> {
+  const redis = getConnection();
+  if (!redis) return;
+
+  try {
+    const keys = await redis.keys(`${CACHE_PREFIX}user:profile:${userId}*`);
+    if (keys.length > 0) {
+      await redis.del(keys);
+    }
+  } catch (err) {
+    console.error("Cache invalidation failed:", err);
+  }
+}
\ No newline at end of file