CAJEROLABS
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// engineering · singapore · remote

We Build The Rails Money Moves On

CajeroLabs is a product engineering company. We design, build and operate the ledger, payout and compliance systems behind the products we run — real money, in real time, across 20+ countries.

Talk to engineering
POST /v1/payouts
{
  "amount": "2500.00",
  "currency": "BRL",
  "rail": "pix",
  "idempotency_key": "8f2c…"
}
201 Created · 412ms
What we build

Systems That Have To Be Right The First Time

Ledgers & balances
Double-entry ledgers with point-in-time reconciliation, spanning local currency and stablecoins. Every cent traces back to a transaction, and every balance can be rebuilt from the log.
Payout rails
Direct integrations with local banks, wallets and instant-payment schemes across LATAM and Southeast Asia — Pix, SPEI, PSE — normalised behind one API and validated against the scheme before a transfer is attempted. New corridors ship without touching product code.
Crypto settlement
Payouts on Ethereum, Solana and Tron in USDC and USDT, with the network fee quoted before you commit and every transaction linked to its block explorer. Same API on testnet.
APIs & SDKs
Versioned REST APIs generated from OpenAPI, with typed clients regenerated in lockstep across every surface we ship. Sandbox keys in minutes, not procurement cycles.
Risk & compliance
KYC/KYB orchestration through Sumsub, passkeys and TOTP on every account, and scoped delegation that grants balance visibility without the right to move money. Controls in the transaction path, not bolted on beside it.
Treasury & FX
Multi-currency treasury with automated rebalancing across corridors, and FX pricing with a full audit trail behind every quote. Every transfer previews its fee and rate before it is sent.

Stack

Boring Where It Matters. Modern Where It Pays.

We pick dependable technology for the money path and move fast on the surface. Nothing here is a bet on a framework surviving the quarter.

Languages
TypeScriptNode.js
Web
React 19Next.js 16ViteTailwind CSS v4Radix UI
Chains
EthereumSolanaTronUSDCUSDT
Contracts
OpenAPIGenerated typed clients
Compliance
Sumsub KYC/KYBAudit logging
Platform
AWSS3 + CloudFrontOIDC federated deploys
Delivery
TurborepopnpmGitHub ActionsPreview env per PRPlaywrightVitest

How we work

  • Contracts generated, never hand-written
  • Every deploy is previewable
  • Typed end to end, API to UI

Built To Be Boring In Production

99.9%
API uptime, rolling 90 days
20+
Countries live
24/7
On-call rotation

Building something that has to move money?

We take on a small number of infrastructure engagements a year, and we're always talking to engineers who like hard correctness problems.

hello@cajerolabs.com