Banking & financial services
Systems where the numbers have to reconcile
Lending and collections platforms, payment reconciliation, customer messaging and the audit trail that makes all of it defensible.
Engagements involving customer financial data run under NDA as standard.
What makes financial software different
The distinguishing constraint isn't complexity — it's that being wrong is not recoverable by trying again. A duplicate charge, a lost transaction or a balance that doesn't tie has consequences that a retry doesn't fix, and a regulator who will eventually ask about it.
So the engineering emphasis shifts. Idempotency on every write path, an append-only ledger rather than mutable balances, reconciliation against the authoritative external source, and an audit trail that can answer who changed what and when, years later.
There's a second layer too: payment rails differ per market, messaging is regulated, and data-protection obligations apply to everything underneath.
What clients in this sector bring us
Five recurring problems, in roughly the order they get urgent.
Reconciliation done by hand
Someone senior spends the first days of every month matching gateway settlements against internal records in a spreadsheet. Automatable, and the automation pays for itself quickly.
Lending and collections workflow
Application, verification, disbursal, repayment schedules and follow-up — usually spread across a core system, a CRM and several spreadsheets that disagree.
Customer communication at scale
Transactional alerts, OTPs, payment reminders and collections follow-ups across SMS, WhatsApp and voice — with consent and opt-out handled properly.
Integrating with the core system
The core banking or lending system that can't be replaced, has a difficult interface, and everything new must still talk to. Usually solved by wrapping rather than replacing.
Evidence for auditors
Access logs, change history and data-flow documentation that exist continuously rather than being assembled in a panic before an audit.
Where we help most
The services that carry most of our BFSI work.
Enterprise Integration
Connecting core systems, payment gateways and CRMs with idempotent, reconcilable flows. The single most common BFSI engagement we take.
Custom Software Development
Lending workflows, collections tooling, customer portals and the operational consoles that replace spreadsheets.
Communication Platform
OTPs, transactional alerts and collections messaging across SMS, WhatsApp, RCS and voice through one API and one invoice.
Cybersecurity
Security audits, access reviews and compliance readiness for the questionnaires your partners and regulators send.
Data & Analytics
Portfolio reporting, collections performance and the reconciled numbers that finance and operations can both accept.
Regulatory context
The requirements that shape architecture decisions in this sector. We design for these rather than retrofitting them.
Data protection
Personal-data mapping, lawful basis, retention limits and breach-notification readiness — designed into the data model rather than documented afterwards.
Financial regulation
Audit trails, access control, incident reporting and data residency shape where systems run and what they log. We build to these constraints from day one.
Messaging rules
Sender registration, consent and opt-out obligations differ per market. We configure routing and consent handling to match your destinations.
PCI DSS scope
Usually the right answer is to keep card data out of your systems entirely via tokenisation, reducing scope rather than certifying across it.
We're engineers, not compliance counsel. We design and evidence the technical controls; formal interpretation stays with your compliance function.
Where we're the right partner — and where we aren't
We're a strong fit for the systems around the regulated core: integration layers, customer-facing platforms, operational tooling, reconciliation, messaging and the data layer. This is where most of the practical pain sits and where general engineering quality matters most.
We're not the right lead for a core banking replacement, a switch migration, or anything requiring a specific regulatory licence to operate. For those we'd expect to work alongside a specialist vendor, handling the surrounding engineering — and we'll say so at the first conversation rather than discovering it later.
FAQ
Banking & financial services
Have you built financial systems before?
We've built payment collection, reconciliation, subscription billing and transactional messaging systems — including our own billing and provisioning platform, which handles payments, invoicing and reconciliation in production. Ask during scoping and, where clients have agreed, we'll arrange a reference relevant to your use case.
How do you handle sensitive customer data?
Minimise what's stored, tokenise where possible, encrypt at rest and in transit, restrict access by role with reviews, and log every privileged action. Card data is kept out of client systems entirely wherever the payment provider supports it — the cheapest compliance is data you never hold.
Can you meet our data residency requirements?
Yes. We design to your residency requirements from the start and document processing locations and data flows as part of delivery.
Can you integrate with our core banking system?
Usually. We've worked with systems whose only interface is a database view or a file drop, as well as modern APIs. The approach is normally to wrap the core in a documented API layer so new work doesn't inherit its interface — and so replacing it later doesn't mean rewriting everything that touches it.
Do you sign NDAs?
As standard for this sector, before any discussion of your systems or data. We also expect to complete your vendor security questionnaire, and we'd rather do that early than discover a blocker after scoping.
What's not reconciling?
Or which workflow still runs on a spreadsheet. Either is a good place to start the conversation.
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