Hire Pre-Vetted Reconciliation Engineers in 3–5 Days

Hire Reconciliation Engineers Who Keep the Numbers Honest

Money moves through processors, banks, and internal ledgers, and each of those systems keeps its own record. Reconciliation is the discipline of checking those records against each other.

Most teams run into issues because they don’t invest in reconciliation properly until something’s already gone wrong, and, because reconciliation sits quietly in the background until it’s needed, issues can compound for months before anyone notices.

Some teams might only figure out they have an issue during a live incident.

This happened to Synapse Financial, at a scale that froze over 100,000 accounts.

Trio places engineers who already understand what it takes to build and maintain a functioning reconciliation system, including real double-entry knowledge, DECIMAL-precise arithmetic, settlement file formats, and matching logic.

If you are ready to hire pre-vetted developers through Trio, request talent!

What Broke at Synapse, and Why It’s an Engineering Story

When Synapse Financial Technologies filed for bankruptcy in April 2024, roughly 100 fintech partners and more than 100,000 end users found their accounts frozen with no clear answer for who owed what.

The court-appointed trustee later identified a shortfall of $65 million to $95 million between what partner banks actually held and what fintech customers were owed.

This issue came from an FBO sub-ledger reconciliation that had stopped working.

An FBO, “for benefit of,” account is a single pooled bank account where a middleware provider like Synapse holds funds on behalf of many end users at once.

While the balance is easily accessible, the sub-ledger is supposed to be the record of exactly whose money makes up that balance, and reconciliation is the process that keeps the sub-ledger and the bank’s own balance in agreement.

When Synapse’s ledgers stopped reconciling cleanly against its partner banks’ records, and the company’s own engineers who understood those ledgers had already left, nobody knew who the money actually belonged to.

That’s the case for treating reconciliation as safety-critical engineering.

The Domain Knowledge That Actually Matters Here

Reconciliation engineering sits at an intersection of real backend engineering skill and financial domain knowledge deep enough to know what the numbers are actually supposed to mean.

Here are some of the things you need to look out for when vetting:

• Double-entry bookkeeping: An engineer who doesn’t understand that every transaction requires a debit and a credit that net to zero will build a reconciliation system that can’t tell the difference between a genuinely missing transaction and one that’s simply been recorded on the wrong side of the ledger.
• DECIMAL precision: In reconciliation specifically, FLOAT arithmetic produces false positives, transactions that are actually correct getting flagged as mismatched because floating-point rounding created a 0.000001 difference that means nothing.
• Matching algorithm design: Handles exact matches, fuzzy matches where the amount and counterparty agree but the timestamp differs because of a settlement cutoff, and genuine unmatched items.
• Settlement file format proficiency: BAI2 bank statements, SWIFT MT940/942 reports, camt.053 ISO 20022 messages, and each processor’s own settlement format (Stripe, Adyen, Braintree) all have their own encoding quirks, cutoff conventions, and malformed-record edge cases.
• Concurrent write safety and temporal alignment: A single payment can be initiated on Monday, authorized on Tuesday, captured on Wednesday, and settled on Thursday, each event logged by a different system in a different time zone. A reconciliation query also has to stay correct while new transactions are still being written to the ledger it’s reading from.

Reconciliation Engineer Rates Through Trio

LATAM nearshore reconciliation engineers through Trio run 40–55% below US domestic rates for comparable domain expertise.

From what we have observed, direct-hire timelines for senior reconciliation engineers commonly run 60–120 days, since the pool of engineers with both the backend depth and the financial domain knowledge is genuinely small.

Trio’s 3–5 day placement compresses that without skipping the domain vetting.

Reconciliation engineering also connects directly to a fintech engineering team more broadly, and to payment engineers and payment ledger architecture specifically, since reconciliation is really the ledger’s correctness being checked against the outside world.

Teams building out broader, scalable payment systems or DevSecOps for fintech practices tend to need this same domain depth in more than one place.

To see if we have the right developer for you, book a discovery call.