diff --git a/apps/backend/src/config/configuration.ts b/apps/backend/src/config/configuration.ts
index 028b210..be1ca82 100644
--- a/apps/backend/src/config/configuration.ts
+++ b/apps/backend/src/config/configuration.ts
@@ -14,6 +14,13 @@ export default registerAs('app', () => ({
       10,
     ),
   },
+  tbank: {
+    token: process.env.T_BANK_TOKEN || '',
+    baseUrl: process.env.T_BANK_BASE_URL || 'invest-public-api.tbank.ru:443',
+    appName: process.env.T_BANK_APP_NAME || 'ksv741.moex-vibe',
+    rateLimitPerSecond: parseInt(process.env.T_BANK_RATE_LIMIT_PER_SECOND || '5', 10),
+    requestTimeoutMs: parseInt(process.env.T_BANK_REQUEST_TIMEOUT_MS || '10000', 10),
+  },
   cache: {
     marketDataTtl: parseInt(process.env.CACHE_MARKET_DATA_TTL || '900', 10),
     historyTtl: parseInt(process.env.CACHE_HISTORY_TTL || '3600', 10),
@@ -21,6 +28,10 @@ export default registerAs('app', () => ({
     securityTtl: parseInt(process.env.CACHE_SECURITY_TTL || '86400', 10),
     searchTtl: parseInt(process.env.CACHE_SEARCH_TTL || '3600', 10),
     dividendsTtl: parseInt(process.env.CACHE_DIVIDENDS_TTL || '86400', 10),
+    tbankAccountsTtl: parseInt(process.env.CACHE_TBANK_ACCOUNTS_TTL || '3600', 10),
+    tbankPortfolioTtl: parseInt(process.env.CACHE_TBANK_PORTFOLIO_TTL || '60', 10),
+    tbankOperationsTtl: parseInt(process.env.CACHE_TBANK_OPERATIONS_TTL || '300', 10),
+    tbankInstrumentTtl: parseInt(process.env.CACHE_TBANK_INSTRUMENT_TTL || '86400', 10),
   },
   auth: {
     jwtSecret: process.env.JWT_SECRET || 'dev-jwt-secret-change-in-production',
diff --git a/apps/backend/src/modules/tbank/tbank.config.spec.ts b/apps/backend/src/modules/tbank/tbank.config.spec.ts
new file mode 100644
index 0000000..a3ae781
--- /dev/null
+++ b/apps/backend/src/modules/tbank/tbank.config.spec.ts
@@ -0,0 +1,39 @@
+import configuration from '../../config/configuration';
+
+describe('T-Bank configuration', () => {
+  const originalEnv = process.env;
+
+  beforeEach(() => {
+    process.env = { ...originalEnv };
+  });
+
+  afterAll(() => {
+    process.env = originalEnv;
+  });
+
+  it('uses conservative defaults for T-Bank integration', () => {
+    delete process.env.T_BANK_BASE_URL;
+    delete process.env.T_BANK_RATE_LIMIT_PER_SECOND;
+    delete process.env.CACHE_TBANK_PORTFOLIO_TTL;
+
+    const config = configuration();
+
+    expect(config.tbank.baseUrl).toBe('invest-public-api.tbank.ru:443');
+    expect(config.tbank.rateLimitPerSecond).toBe(5);
+    expect(config.cache.tbankPortfolioTtl).toBe(60);
+  });
+
+  it('reads T-Bank token and TTL overrides from environment', () => {
+    process.env.T_BANK_TOKEN = 'secret-token';
+    process.env.T_BANK_BASE_URL = 'sandbox-invest-public-api.tbank.ru:443';
+    process.env.T_BANK_RATE_LIMIT_PER_SECOND = '2';
+    process.env.CACHE_TBANK_ACCOUNTS_TTL = '120';
+
+    const config = configuration();
+
+    expect(config.tbank.token).toBe('secret-token');
+    expect(config.tbank.baseUrl).toBe('sandbox-invest-public-api.tbank.ru:443');
+    expect(config.tbank.rateLimitPerSecond).toBe(2);
+    expect(config.cache.tbankAccountsTtl).toBe(120);
+  });
+});
diff --git a/apps/backend/src/modules/tbank/tbank.config.ts b/apps/backend/src/modules/tbank/tbank.config.ts
new file mode 100644
index 0000000..803376f
--- /dev/null
+++ b/apps/backend/src/modules/tbank/tbank.config.ts
@@ -0,0 +1,22 @@
+export const TBANK_PROTO_PACKAGE = 'tinkoff.public.invest.api.contract.v1';
+
+export const TBANK_PROTO_FILES = {
+  users: 'users.proto',
+  operations: 'operations.proto',
+  instruments: 'instruments.proto',
+} as const;
+
+export const TBANK_ACCOUNT_TYPES = {
+  brokerage: 'ACCOUNT_TYPE_TINKOFF',
+  iis: 'ACCOUNT_TYPE_TINKOFF_IIS',
+} as const;
+
+export const TBANK_OPEN_ACCOUNT_STATUS = 'ACCOUNT_STATUS_OPEN';
+
+export const TBANK_CACHE_KEYS = {
+  accounts: 'tbank:accounts',
+  portfolio: 'tbank:portfolio',
+  positions: 'tbank:positions',
+  operations: 'tbank:operations',
+  instrument: 'tbank:instrument',
+} as const;
diff --git a/apps/backend/src/modules/tbank/types/broker.types.ts b/apps/backend/src/modules/tbank/types/broker.types.ts
new file mode 100644
index 0000000..113a77e
--- /dev/null
+++ b/apps/backend/src/modules/tbank/types/broker.types.ts
@@ -0,0 +1,90 @@
+export type BrokerMoney = {
+  currency: string;
+  units: string;
+  nano: number;
+  value: number;
+};
+
+export type BrokerAccount = {
+  id: string;
+  type: 'brokerage' | 'iis';
+  name: string;
+  status: string;
+  openedAt: string | null;
+  accessLevel: string | null;
+};
+
+export type BrokerPosition = {
+  figi: string | null;
+  instrumentUid: string | null;
+  positionUid: string | null;
+  ticker: string | null;
+  classCode: string | null;
+  instrumentType: string | null;
+  name: string | null;
+  quantity: number | null;
+  blockedLots: number | null;
+  currentPrice: BrokerMoney | null;
+  currentValue: BrokerMoney | null;
+  averagePositionPrice: BrokerMoney | null;
+  expectedYieldPercent: number | null;
+  dailyYield: BrokerMoney | null;
+};
+
+export type BrokerPortfolio = {
+  account: BrokerAccount;
+  totals: {
+    shares: BrokerMoney | null;
+    bonds: BrokerMoney | null;
+    etf: BrokerMoney | null;
+    currencies: BrokerMoney | null;
+    futures: BrokerMoney | null;
+    options: BrokerMoney | null;
+    structuredProducts: BrokerMoney | null;
+    dfa: BrokerMoney | null;
+    portfolio: BrokerMoney | null;
+  };
+  yields: {
+    expectedPercent: number | null;
+    daily: BrokerMoney | null;
+    dailyPercent: number | null;
+  };
+  cash: BrokerMoney[];
+  blockedCash: BrokerMoney[];
+  positions: BrokerPosition[];
+  asOf: string;
+};
+
+export type BrokerOperationCategory = 'trade' | 'income' | 'tax' | 'fee' | 'transfer' | 'other';
+
+export type BrokerOperation = {
+  cursor: string | null;
+  accountId: string;
+  id: string | null;
+  parentOperationId: string | null;
+  date: string | null;
+  type: string;
+  category: BrokerOperationCategory;
+  description: string | null;
+  state: string | null;
+  instrumentUid: string | null;
+  figi: string | null;
+  ticker: string | null;
+  classCode: string | null;
+  instrumentType: string | null;
+  payment: BrokerMoney | null;
+  price: BrokerMoney | null;
+  commission: BrokerMoney | null;
+  yield: BrokerMoney | null;
+  accruedInt: BrokerMoney | null;
+  quantity: number | null;
+  quantityDone: number | null;
+};
+
+export type BrokerOperationsPage = {
+  accountId: string;
+  items: BrokerOperation[];
+  nextCursor: string | null;
+  hasNext: boolean;
+  asOf: string;
+};
diff --git a/apps/backend/src/modules/tbank/types/tbank-proto.types.ts b/apps/backend/src/modules/tbank/types/tbank-proto.types.ts
new file mode 100644
index 0000000..c6abb88
--- /dev/null
+++ b/apps/backend/src/modules/tbank/types/tbank-proto.types.ts
@@ -0,0 +1,148 @@
+export type TBankTimestamp = {
+  seconds?: number | string;
+  nanos?: number;
+};
+
+export type TBankMoneyValue = {
+  currency?: string;
+  units?: number | string;
+  nano?: number;
+};
+
+export type TBankQuotation = {
+  units?: number | string;
+  nano?: number;
+};
+
+export type TBankAccount = {
+  id: string;
+  type: string;
+  name?: string;
+  status: string;
+  openedDate?: TBankTimestamp;
+  closedDate?: TBankTimestamp;
+  accessLevel?: string;
+};
+
+export type TBankAccountsResponse = {
+  accounts?: TBankAccount[];
+};
+
+export type TBankPortfolioPosition = {
+  figi?: string;
+  instrumentType?: string;
+  quantity?: TBankQuotation;
+  averagePositionPrice?: TBankMoneyValue;
+  expectedYield?: TBankQuotation;
+  currentNkd?: TBankMoneyValue;
+  currentPrice?: TBankMoneyValue;
+  averagePositionPriceFifo?: TBankMoneyValue;
+  blocked?: boolean;
+  blockedLots?: TBankQuotation;
+  positionUid?: string;
+  instrumentUid?: string;
+  expectedYieldFifo?: TBankQuotation;
+  dailyYield?: TBankMoneyValue;
+  ticker?: string;
+  classCode?: string;
+};
+
+export type TBankPortfolioResponse = {
+  accountId?: string;
+  totalAmountShares?: TBankMoneyValue;
+  totalAmountBonds?: TBankMoneyValue;
+  totalAmountEtf?: TBankMoneyValue;
+  totalAmountCurrencies?: TBankMoneyValue;
+  totalAmountFutures?: TBankMoneyValue;
+  expectedYield?: TBankQuotation;
+  positions?: TBankPortfolioPosition[];
+  totalAmountOptions?: TBankMoneyValue;
+  totalAmountSp?: TBankMoneyValue;
+  totalAmountPortfolio?: TBankMoneyValue;
+  dailyYield?: TBankMoneyValue;
+  dailyYieldRelative?: TBankQuotation;
+  totalAmountDfa?: TBankMoneyValue;
+};
+
+export type TBankPositionsSecurity = {
+  figi?: string;
+  blocked?: string | number;
+  balance?: string | number;
+  positionUid?: string;
+  instrumentUid?: string;
+  ticker?: string;
+  classCode?: string;
+  exchangeBlocked?: boolean;
+  instrumentType?: string;
+};
+
+export type TBankPositionsResponse = {
+  accountId?: string;
+  money?: TBankMoneyValue[];
+  blocked?: TBankMoneyValue[];
+  securities?: TBankPositionsSecurity[];
+};
+
+export type TBankOperationTrade = {
+  num?: string;
+  date?: TBankTimestamp;
+  quantity?: string | number;
+  price?: TBankMoneyValue;
+  yield?: TBankMoneyValue;
+  yieldRelative?: TBankQuotation;
+};
+
+export type TBankOperationItem = {
+  cursor?: string;
+  brokerAccountId?: string;
+  id?: string;
+  parentOperationId?: string;
+  name?: string;
+  date?: TBankTimestamp;
+  type?: string;
+  description?: string;
+  state?: string;
+  instrumentUid?: string;
+  figi?: string;
+  instrumentType?: string;
+  instrumentKind?: string;
+  positionUid?: string;
+  ticker?: string;
+  classCode?: string;
+  payment?: TBankMoneyValue;
+  price?: TBankMoneyValue;
+  commission?: TBankMoneyValue;
+  yield?: TBankMoneyValue;
+  yieldRelative?: TBankQuotation;
+  accruedInt?: TBankMoneyValue;
+  quantity?: string | number;
+  quantityRest?: string | number;
+  quantityDone?: string | number;
+  tradesInfo?: { trades?: TBankOperationTrade[] };
+};
+
+export type TBankOperationsByCursorResponse = {
+  hasNext?: boolean;
+  nextCursor?: string;
+  items?: TBankOperationItem[];
+};
+
+export type TBankInstrument = {
+  figi?: string;
+  ticker?: string;
+  classCode?: string;
+  isin?: string;
+  lot?: number;
+  currency?: string;
+  name?: string;
+  exchange?: string;
+  instrumentType?: string;
+  uid?: string;
+  positionUid?: string;
+  assetUid?: string;
+  instrumentKind?: string;
+};
+
+export type TBankInstrumentResponse = {
+  instrument?: TBankInstrument;
+};