diff --git a/.github/workflows/backend-tests.yml b/.github/workflows/backend-tests.yml
index d1410738..66ee795f 100644
--- a/.github/workflows/backend-tests.yml
+++ b/.github/workflows/backend-tests.yml
@@ -40,6 +40,11 @@ jobs:
         env:
           NODE_ENV: test
 
+      - name: Run integration tests
+        run: npx jest --testRegex=".*\\.integration-spec\\.ts$" --testPathPattern="contract-indexer"
+        env:
+          NODE_ENV: test
+
       - name: Upload coverage report
         uses: actions/upload-artifact@v4
         if: always()
diff --git a/Backend/README.md b/Backend/README.md
index cd314361..c262310c 100644
--- a/Backend/README.md
+++ b/Backend/README.md
@@ -262,6 +262,7 @@ Table: `gists`
 | `npm run start:prod` | Run compiled output |
 | `npm test` | Unit tests |
 | `npm run test:e2e` | End-to-end tests |
+| `npm run test:integration` | Integration tests (including contract-indexer end-to-end flow) |
 
 ---
 
diff --git a/Backend/src/indexer/contract-indexer.integration-spec.ts b/Backend/src/indexer/contract-indexer.integration-spec.ts
new file mode 100644
index 00000000..c43f6397
--- /dev/null
+++ b/Backend/src/indexer/contract-indexer.integration-spec.ts
@@ -0,0 +1,153 @@
+import { IndexerService } from './indexer.service';
+import { SorobanService } from '../soroban/soroban.service';
+import { GistRepository } from '../gists/gist.repository';
+import { GeoService } from '../geo/geo.service';
+import { IndexerState } from './indexer-state.entity';
+import { Repository } from 'typeorm';
+
+describe('Contract-Indexer Integration Flow (integration)', () => {
+  let indexerService: IndexerService;
+  let sorobanService: jest.Mocked<SorobanService>;
+  let gistRepository: jest.Mocked<GistRepository>;
+  let geoService: jest.Mocked<GeoService>;
+  let indexerStateRepo: jest.Mocked<Repository<IndexerState>>;
+
+  const store = new Map<string, any>();
+
+  beforeEach(() => {
+    store.clear();
+
+    sorobanService = {
+      getEventsSince: jest.fn(),
+      getLatestLedger: jest.fn().mockResolvedValue(0),
+    } as unknown as jest.Mocked<SorobanService>;
+
+    gistRepository = {
+      findByStellarGistId: jest.fn(),
+      existsByStellarGistId: jest.fn(),
+      create: jest.fn(async (data: any) => {
+        const item = {
+          id: `uuid-${data.stellar_gist_id}`,
+          content: data.content,
+          location_cell: data.location_cell,
+          content_hash: data.content_hash,
+          stellar_gist_id: data.stellar_gist_id,
+          tx_hash: data.tx_hash,
+          author_address: data.author_address ?? null,
+          created_at: new Date(),
+          expires_at: data.expires_at ?? new Date(Date.now() + 86400000),
+          hidden: false,
+          report_count: 0,
+          is_active: true,
+        };
+        store.set(data.stellar_gist_id, item);
+        return item;
+      }),
+      updateContentHash: jest.fn(async (id: string, hash: string) => {
+        const item = store.get(id);
+        if (item) {
+          item.content_hash = hash;
+          return true;
+        }
+        return false;
+      }),
+      setGistActive: jest.fn(async (id: string, active: boolean) => {
+        const item = store.get(id);
+        if (item) {
+          item.is_active = active;
+          return true;
+        }
+        return false;
+      }),
+      setGistHidden: jest.fn(async (id: string, hidden: boolean) => {
+        const item = store.get(id);
+        if (item) {
+          item.hidden = hidden;
+          return true;
+        }
+        return false;
+      }),
+      updateReportCount: jest.fn(async (id: string, count: number) => {
+        const item = store.get(id);
+        if (item) {
+          item.report_count = count;
+          return true;
+        }
+        return false;
+      }),
+    } as unknown as jest.Mocked<GistRepository>;
+
+    geoService = {
+      decode: jest.fn().mockReturnValue({ lat: 6.5244, lon: 3.3792 }),
+    } as unknown as jest.Mocked<GeoService>;
+
+    indexerStateRepo = {
+      findOne: jest.fn(),
+      create: jest.fn(),
+      save: jest.fn(),
+    } as unknown as jest.Mocked<Repository<IndexerState>>;
+
+    indexerStateRepo.findOne.mockResolvedValue(null as never);
+    indexerStateRepo.create.mockImplementation((state: Partial<IndexerState>) => state as any);
+    indexerStateRepo.save.mockImplementation(async (state: Partial<IndexerState>) => state as any);
+
+    indexerService = new IndexerService(
+      sorobanService,
+      gistRepository,
+      geoService,
+      indexerStateRepo as any,
+    );
+  });
+
+  it('indexes a gist_posted event into the store', async () => {
+    const stellarGistId = 'gist-1042';
+
+    gistRepository.findByStellarGistId.mockResolvedValue(null);
+    sorobanService.getEventsSince.mockImplementation(async () => [
+      {
+        type: 'gist_posted',
+        ledger: 100,
+        gist: {
+          gistId: stellarGistId,
+          locationCell: 's1t7d8c',
+          contentHash: 'QmInitialCid',
+          author: null,
+          createdAt: 1700000000,
+          expiresAt: 1700086400,
+          hidden: false,
+        },
+      },
+    ]);
+
+    await indexerService.poll();
+    expect(gistRepository.create).toHaveBeenCalledTimes(1);
+    expect(store.get(stellarGistId)).toMatchObject({
+      content_hash: 'QmInitialCid',
+      is_active: true,
+    });
+  });
+
+  it('skips an already-indexed gist', async () => {
+    const stellarGistId = 'gist-1042';
+
+    gistRepository.existsByStellarGistId.mockResolvedValue(true);
+    sorobanService.getEventsSince.mockImplementation(async () => [
+      {
+        type: 'gist_posted',
+        ledger: 100,
+        gist: {
+          gistId: stellarGistId,
+          locationCell: 's1t7d8c',
+          contentHash: 'QmDuplicate',
+          author: null,
+          createdAt: 1700000000,
+          expiresAt: 1700086400,
+          hidden: false,
+        },
+      },
+    ]);
+
+    await indexerService.poll();
+    expect(gistRepository.create).not.toHaveBeenCalled();
+  });
+});