Industry

Finance Software Development

Where the numbers have to reconcile every time.

Financial software has a property most systems do not: there is an external definition of correct, and it will be checked. A balance either reconciles or it does not, and "mostly right" is indistinguishable from wrong.

That makes some ordinary engineering decisions unacceptable here. Floating-point arithmetic for money, updates that overwrite rather than append, and processes that cannot be replayed after a failure are all fine in many products and disqualifying in this one.

We build lending and origination workflows, payment and reconciliation tooling, customer portals over core systems, and the reporting that turns transactional data into something a regulator or a board will accept.

Common challenges

What tends to go wrong

State changes have to be reconstructable. When a figure is queried six months later, the answer required is not just the current value but how it got there, who changed it and under what authority. Systems that store only the latest state cannot answer that at any price.Integrations are asynchronous and occasionally dishonest. Payment providers time out after having succeeded, banks post with a delay, and a retry that is not idempotent turns a timeout into a duplicate transaction.Regulatory requirements change on someone else's schedule. A reporting format or a rule can change with months of notice, and a system that hard-codes the current rules makes that a rebuild rather than a configuration change.

How we address it

What we build instead

We model money as integer minor units and monetary movement as an append-only ledger. Balances are derived rather than stored and edited, which means history cannot be silently rewritten and reconciliation has something to reconcile against.Every external call is idempotent and every side effect is recorded before it is attempted, so a timeout can be resolved by asking rather than by guessing. Anything that touches a third party is replayable, because at some point it will need replaying.Rules that are subject to change — rates, limits, thresholds, report formats — live in configuration with an effective date rather than in code, so a change is a data change with an audit trail rather than a release.

Outcomes

What typically improves

Reconciliation becomes a routine check rather than an investigation, because the ledger and the movements are the same source of truth.Questions from auditors, regulators and customers about a specific figure can be answered from the system, with the sequence of events that produced it, rather than from a reconstruction that itself needs verifying.

Relevant services

How we help finance teams

All services

Case studies

Work in Finance

Finance

Document AI & Data Extraction

A reference build for intelligent document processing: invoices, purchase orders, forms and identity documents read into structured records, with per-field confidence scores and a human review queue for anything uncertain.
- Laravel
- PHP
- REST APIs
- +3
View case study

Frequently asked questions

Can you work with our core banking or accounting system?

Yes — that is the normal shape of the work. The core system stays as the system of record and our work sits around it: origination, servicing, portals and reporting. Integration is built assuming the interface is slow and occasionally unavailable, because that assumption is always eventually correct.

How do you handle compliance requirements?

We build so that the evidence exists: immutable history, complete audit trails, role-based access with logging, retention rules and reproducible reporting. What we do not do is assert that a system is compliant with a specific regime — that assessment belongs to your compliance function or an external assessor, and our job is to make sure they have something to assess.

What about a duplicate payment caused by a retry?

Idempotency keys on every outbound request, and recording the intent before the attempt. If a call times out after the provider has already processed it, the retry is recognised as the same operation rather than treated as a new one. This is the single most common cause of real financial defects and it has to be designed in from the start.

Building for finance?

Tell us how the operation runs today. We will tell you where software would actually help.

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