diff --git a/src/__tests__/common/interface/data/interface/IGetAllQueryBuilder.ts b/src/__tests__/common/interface/data/interface/IGetAllQueryBuilder.ts
new file mode 100644
index 000000000..0d6b595d4
--- /dev/null
+++ b/src/__tests__/common/interface/data/interface/IGetAllQueryBuilder.ts
@@ -0,0 +1,40 @@
+import { IGetAllQuery } from '../../../../../common/interface/IGetAllQuery';
+
+export default class IGetAllQueryBuilder {
+  private readonly base: Partial<IGetAllQuery> = {
+    filter: {},
+    select: [],
+    limit: 0,
+    sort: {},
+    skip: 0,
+  };
+
+  build(): IGetAllQuery {
+    return { ...this.base } as IGetAllQuery;
+  }
+
+  setFilter(filter: object) {
+    this.base.filter = filter;
+    return this;
+  }
+
+  setSelect(select: string[]) {
+    this.base.select = select;
+    return this;
+  }
+
+  setLimit(limit: number) {
+    this.base.limit = limit;
+    return this;
+  }
+
+  setSort(sort: Record<string, 1 | -1>) {
+    this.base.sort = sort;
+    return this;
+  }
+
+  setSkip(skip: number) {
+    this.base.skip = skip;
+    return this;
+  }
+}
diff --git a/src/__tests__/common/interface/data/interfaceBuilderFactory.ts b/src/__tests__/common/interface/data/interfaceBuilderFactory.ts
new file mode 100644
index 000000000..35979f7a6
--- /dev/null
+++ b/src/__tests__/common/interface/data/interfaceBuilderFactory.ts
@@ -0,0 +1,18 @@
+import IGetAllQueryBuilder from './interface/IGetAllQueryBuilder';
+
+type BuilderName = 'IGetAllQuery';
+
+type BuilderMap = {
+  IGetAllQuery: IGetAllQueryBuilder;
+};
+
+export default class InterfaceBuilderFactory {
+  static getBuilder<T extends BuilderName>(builderName: T): BuilderMap[T] {
+    switch (builderName) {
+      case 'IGetAllQuery':
+        return new IGetAllQueryBuilder() as BuilderMap[T];
+      default:
+        throw new Error(`Unknown builder name: ${builderName}`);
+    }
+  }
+}
diff --git a/src/__tests__/common/service/redis/mocks/RedisServiceInMemory.ts b/src/__tests__/common/service/redis/mocks/RedisServiceInMemory.ts
new file mode 100644
index 000000000..fc03fd53e
--- /dev/null
+++ b/src/__tests__/common/service/redis/mocks/RedisServiceInMemory.ts
@@ -0,0 +1,52 @@
+import { Injectable, OnModuleDestroy } from '@nestjs/common';
+
+/**
+ * In-memory mock of RedisService for use in tests.
+ * Simulates set/get/keys with TTL support.
+ */
+@Injectable()
+export class RedisServiceInMemory implements OnModuleDestroy {
+  private readonly store = new Map<
+    string,
+    { value: string; expiresAt?: number }
+  >();
+
+  private isDestroyed = false;
+
+  async set(key: string, value: string, ttlS?: number): Promise<void> {
+    const expiresAt = ttlS ? Date.now() + ttlS * 1000 : undefined;
+    this.store.set(key, { value, expiresAt });
+  }
+
+  async get(key: string): Promise<string | null> {
+    const entry = this.store.get(key);
+    if (!entry) return null;
+
+    if (entry.expiresAt && Date.now() > entry.expiresAt) {
+      this.store.delete(key);
+      return null;
+    }
+
+    return entry.value;
+  }
+
+  async getKeys(pattern: string): Promise<string[]> {
+    const regex = new RegExp('^' + pattern.replace('*', '.*') + '$');
+    const now = Date.now();
+
+    return Array.from(this.store.entries())
+      .filter(([key, { expiresAt }]) => {
+        if (expiresAt && now > expiresAt) {
+          this.store.delete(key);
+          return false;
+        }
+        return regex.test(key);
+      })
+      .map(([key]) => key);
+  }
+
+  async onModuleDestroy() {
+    this.store.clear();
+    this.isDestroyed = true;
+  }
+}
diff --git a/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanLeaderboard.test.ts b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanLeaderboard.test.ts
new file mode 100644
index 000000000..3fba6bb82
--- /dev/null
+++ b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanLeaderboard.test.ts
@@ -0,0 +1,52 @@
+import { LeaderboardService } from '../../../leaderboard/leaderboard.service';
+import ClanBuilderFactory from '../../clan/data/clanBuilderFactory';
+import ClanModule from '../../clan/modules/clan.module';
+import LeaderboardModule from '../modules/leaderboard.module';
+import InterfaceBuilderFactory from '../../common/interface/data/interfaceBuilderFactory';
+import { Clan } from '../../../clan/clan.schema';
+
+describe('LeaderboardService.getClanLeaderboard() test suite', () => {
+  let service: LeaderboardService;
+  const queryBuilder = InterfaceBuilderFactory.getBuilder('IGetAllQuery');
+
+  const clanBuilder = ClanBuilderFactory.getBuilder('Clan');
+  const clan1 = clanBuilder.setName('clan-1').setPoints(100).build();
+  const clan2 = clanBuilder.setName('clan-2').setPoints(50).build();
+  const clan3 = clanBuilder.setName('clan-3').setPoints(10).build();
+  const clanModel = ClanModule.getClanModel();
+
+  beforeEach(async () => {
+    service = await LeaderboardModule.getLeaderboardService();
+
+    await clanModel.create(clan1);
+    await clanModel.create(clan2);
+    await clanModel.create(clan3);
+  });
+
+  it('Should return leading clans in valid order', async () => {
+    const query = queryBuilder.setLimit(10).setSkip(0).build();
+
+    const leaders = (await service.getClanLeaderboard(query)) as Clan[];
+
+    const clanNames = leaders.map((leader) => leader.name);
+
+    expect(clanNames).toEqual([clan1.name, clan2.name, clan3.name]);
+  });
+
+  it('Should return requested amount of leading clans', async () => {
+    const query = queryBuilder.setLimit(2).setSkip(0).build();
+
+    const leaders = await service.getClanLeaderboard(query);
+
+    expect(leaders).toHaveLength(2);
+  });
+
+  it('Should be able to skip leading clans', async () => {
+    const query = queryBuilder.setLimit(10).setSkip(2).build();
+
+    const leaders = (await service.getClanLeaderboard(query)) as Clan[];
+
+    expect(leaders).toHaveLength(1);
+    expect(leaders[0].name).toBe(clan3.name);
+  });
+});
diff --git a/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanPosition.test.ts b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanPosition.test.ts
new file mode 100644
index 000000000..b51ad491a
--- /dev/null
+++ b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getClanPosition.test.ts
@@ -0,0 +1,41 @@
+import { LeaderboardService } from '../../../leaderboard/leaderboard.service';
+import ClanBuilderFactory from '../../clan/data/clanBuilderFactory';
+import ClanModule from '../../clan/modules/clan.module';
+import LeaderboardModule from '../modules/leaderboard.module';
+import { getNonExisting_id } from '../../test_utils/util/getNonExisting_id';
+
+describe('LeaderboardService.getClanPosition() test suite', () => {
+  let service: LeaderboardService;
+
+  const clanBuilder = ClanBuilderFactory.getBuilder('Clan');
+  const clan1 = clanBuilder.setName('clan-1').setPoints(100).build();
+  const clan2 = clanBuilder.setName('clan-2').setPoints(50).build();
+  const clan3 = clanBuilder.setName('clan-3').setPoints(10).build();
+  const clanModel = ClanModule.getClanModel();
+
+  beforeEach(async () => {
+    service = await LeaderboardModule.getLeaderboardService();
+
+    const createClan1 = await clanModel.create(clan1);
+    clan1._id = createClan1._id.toString();
+    const createClan2 = await clanModel.create(clan2);
+    clan2._id = createClan2._id.toString();
+    const createClan3 = await clanModel.create(clan3);
+    clan3._id = createClan3._id.toString();
+  });
+
+  it('Should return valid order number of the requested clan', async () => {
+    const { position } = await service.getClanPosition(clan2._id);
+
+    expect(position).toBe(2);
+  });
+
+  it('Should throw ServiceError NOT_FOUND if clan with the _id can not be found', async () => {
+    try {
+      await service.getClanPosition(getNonExisting_id());
+      fail('getClanPosition() did not throw');
+    } catch (e) {
+      expect(e).toBeSE_NOT_FOUND();
+    }
+  });
+});
diff --git a/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getPlayerLeaderboard.test.ts b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getPlayerLeaderboard.test.ts
new file mode 100644
index 000000000..338cc87b9
--- /dev/null
+++ b/src/__tests__/leaderboard/LeaderboardService/LeaderboardService.getPlayerLeaderboard.test.ts
@@ -0,0 +1,87 @@
+import { LeaderboardService } from '../../../leaderboard/leaderboard.service';
+import ClanBuilderFactory from '../../clan/data/clanBuilderFactory';
+import ClanModule from '../../clan/modules/clan.module';
+import LeaderboardModule from '../modules/leaderboard.module';
+import InterfaceBuilderFactory from '../../common/interface/data/interfaceBuilderFactory';
+import PlayerBuilderFactory from '../../player/data/playerBuilderFactory';
+import PlayerModule from '../../player/modules/player.module';
+import { Player } from '../../../player/schemas/player.schema';
+import LoggedUser from '../../test_utils/const/loggedUser';
+
+describe('LeaderboardService.getPlayerLeaderboard() test suite', () => {
+  let service: LeaderboardService;
+  const queryBuilder = InterfaceBuilderFactory.getBuilder('IGetAllQuery');
+
+  const playerBuilder = PlayerBuilderFactory.getBuilder('Player');
+  const player1 = playerBuilder
+    .setName('player-1')
+    .setUniqueIdentifier('player-1')
+    .setPoints(100)
+    .build();
+  const player2 = playerBuilder
+    .setName('player-2')
+    .setUniqueIdentifier('player-2')
+    .setPoints(50)
+    .build();
+  const player3 = playerBuilder
+    .setName('player-3')
+    .setUniqueIdentifier('player-3')
+    .setPoints(10)
+    .build();
+  const playerModel = PlayerModule.getPlayerModel();
+
+  const clanBuilder = ClanBuilderFactory.getBuilder('Clan');
+  const clan = clanBuilder.setName('clan').setPoints(100).build();
+  const clanModel = ClanModule.getClanModel();
+
+  beforeEach(async () => {
+    service = await LeaderboardModule.getLeaderboardService();
+
+    //Remove pre-created default player
+    await playerModel.deleteOne({ name: LoggedUser.getPlayer().name });
+
+    const createdClan = await clanModel.create(clan);
+    clan._id = createdClan._id;
+
+    player1.clan_id = clan._id;
+    player2.clan_id = clan._id;
+    player3.clan_id = clan._id;
+
+    await playerModel.create(player1);
+    await playerModel.create(player2);
+    await playerModel.create(player3);
+  });
+
+  it('Should return leading players in valid order', async () => {
+    const query = queryBuilder.setLimit(10).build();
+
+    const leaders = (await service.getPlayerLeaderboard(query)) as Player[];
+
+    const playerNames = leaders.map((leader) => leader.name);
+
+    expect(playerNames).toEqual([player1.name, player2.name, player3.name]);
+  });
+
+  it('Should return clanLogo data if player is in a clan', async () => {
+    const query = queryBuilder.setLimit(10).build();
+
+    const leaders = (await service.getPlayerLeaderboard(query)) as any[];
+
+    expect(leaders[0].clanLogo).toEqual(clan.clanLogo);
+  });
+
+  it('Should return requested amount of leading players', async () => {
+    const query = queryBuilder.setLimit(2).setSkip(0).build();
+    const leaders = await service.getPlayerLeaderboard(query);
+
+    expect(leaders).toHaveLength(2);
+  });
+
+  it('Should be able to skip leading players', async () => {
+    const query = queryBuilder.setLimit(10).setSkip(2).build();
+    const leaders = (await service.getPlayerLeaderboard(query)) as Player[];
+
+    expect(leaders).toHaveLength(1);
+    expect(leaders[0].name).toBe(player3.name);
+  });
+});
diff --git a/src/__tests__/leaderboard/modules/leaderboard.module.ts b/src/__tests__/leaderboard/modules/leaderboard.module.ts
new file mode 100644
index 000000000..95d6e3cc7
--- /dev/null
+++ b/src/__tests__/leaderboard/modules/leaderboard.module.ts
@@ -0,0 +1,11 @@
+import { LeaderboardService } from '../../../leaderboard/leaderboard.service';
+import LeaderboardCommonModule from './leaderboardCommon';
+
+export default class LeaderboardModule {
+  private constructor() {}
+
+  static async getLeaderboardService() {
+    const module = await LeaderboardCommonModule.getModule();
+    return module.resolve(LeaderboardService);
+  }
+}
diff --git a/src/__tests__/leaderboard/modules/leaderboardCommon.ts b/src/__tests__/leaderboard/modules/leaderboardCommon.ts
new file mode 100644
index 000000000..0053606cc
--- /dev/null
+++ b/src/__tests__/leaderboard/modules/leaderboardCommon.ts
@@ -0,0 +1,35 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { MongooseModule } from '@nestjs/mongoose';
+import { RequestHelperModule } from '../../../requestHelper/requestHelper.module';
+import { mongooseOptions, mongoString } from '../../test_utils/const/db';
+import { RedisServiceInMemory } from '../../common/service/redis/mocks/RedisServiceInMemory';
+import { PlayerModule } from '../../../player/player.module';
+import { ClanModule } from '../../../clan/clan.module';
+import { RedisModule } from '../../../common/service/redis/redis.module';
+import { LeaderboardService } from '../../../leaderboard/leaderboard.service';
+import { RedisService } from '../../../common/service/redis/redis.service';
+
+export default class LeaderboardCommonModule {
+  private constructor() {}
+
+  private static module: TestingModule;
+
+  static async getModule() {
+    if (!LeaderboardCommonModule.module)
+      LeaderboardCommonModule.module = await Test.createTestingModule({
+        imports: [
+          MongooseModule.forRoot(mongoString, mongooseOptions),
+          PlayerModule,
+          ClanModule,
+          RedisModule,
+          RequestHelperModule,
+        ],
+        providers: [LeaderboardService],
+      })
+        .overrideProvider(RedisService)
+        .useClass(RedisServiceInMemory)
+        .compile();
+
+    return LeaderboardCommonModule.module;
+  }
+}