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HashmarkLabs

Financial & trading infrastructure

Exchange-⁠grade trading on a double-⁠entry ledger

One system for banking, trading, wallets and payments.

Status
● Live in production
Client
Private
Practice
Engineering
Trading terminalHFT · spot · demoInternal matching engineuser-to-user firstmatchedexternal exchanges · residual liquidity onlyCEX 1CEX 2CEX 3CEX 4Double-entry ledgeratomic transactionsdebitcreditFiat on/off-rampCard paymentsDeposits & withdrawalsMulti-asset walletsreconciled against the ledgerreconcile1Users match with each other first;exchanges only see what's left over2Trading and money movement in oneledger, with no reconciliation gapMPC custody-readyordersmoney movementan order

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Discipline
Financial & trading infrastructure
Client
Private
Figure
FIG. 2
FIG. 2: Order flow & settlement, simplified · ● live in production

The problem

The platform needed exchange-quality order execution and bank-quality money movement in the same system, with no reconciliation gaps between the two.

What we built

3 parts
  1. A

    An internal matching engine that fills orders user-to-user first and routes what’s left to external centralised exchanges.

  2. B

    A double-entry ledger with atomic transactions for deposits, withdrawals and wallet reconciliation.

  3. C

    Fiat on/off-ramp and card-payment integrations, and a high-frequency trading terminal with spot and demo trading.

Stack

  • Matching engine
  • Double-entry ledger
  • Fiat on/off-ramp
  • MPC custody-ready

Designed and built by our senior engineers. The architects you'd meet on a first call are the people who built this.

Client names stay private. Every system here is real and in production, and we're glad to walk you through the ones relevant to you on a call.

Office hours

Working on something similar?

Your first call is with a senior lead who will own the work. Send a few lines about the product and what's hard about it.

Your point of contact
Vidit Galav, Director
Delivery
Our team works across US, European, APAC and Middle East hours.