Custom software development

Custom software for businesses that run on payments.

We design, build and support the systems that collect, move and account for your money, so your team can grow volume without growing the back office.

ops.logsample
  • 09:14:02payment.receivedGHS 1,250.00 · mobile money
  • 09:14:02payment.matchedinvoice INV-4821
  • 09:14:03ledger.posted+1,250.00 · book 48,310.75
  • 09:14:05receipt.sentcustomer notified by SMS
  • 09:14:09payout.sentGHS 900.00 → supplier
  • 09:14:31balance.checkedbank agrees with book
  • 09:15:10review.flagged1 payment needs a look

What we build

Every layer of a payments business.

Take one layer or all four. We work around the systems and providers you already have.

↑ what your customers see

  • Customer experience

    AI assistants and customer channels

    Assistants that answer payment questions at any hour, guide customers through a transaction, and bring in your staff when a person is needed.

    • AI chat assistants
    • Customer portals and apps
    • Receipts and notifications
  • Operations

    Back-office automation

    Reconciliation, approvals and reporting that run on their own, so your finance and operations teams only handle the exceptions.

    • Automated reconciliation
    • Internal tools and dashboards
    • Financial reporting
  • Payments

    Payment integrations

    We connect your business to banks, mobile money, cards and wallets. Legacy systems and modern APIs alike, behind one consistent interface.

    • Collections and payouts
    • Banks and mobile money
    • Cards and wallets
  • Platform

    Secure, reliable foundations

    Cloud infrastructure designed for financial workloads: secured, monitored and ready to grow with your volumes.

    • Cloud infrastructure
    • Security and access control
    • Monitoring and support

↓ what everything runs on

Where we help

The problems we get called for.

  • "Reconciliation still lives in spreadsheets."

    We replace manual matching with software that reconciles every payment as it arrives and flags only what needs a person.

  • "Adding a payment provider takes months."

    We build the integration layer once, so the next bank, wallet or provider plugs in without touching the rest of your product.

  • "Support is buried in payment questions."

    We put an AI assistant on your customer channels that answers status questions straight away and passes the hard ones to your team.

  • "The system we started with can't keep up."

    We modernise or replace legacy software in stages, without interrupting the payments already flowing through it.

Our standard

Built the way money needs.

Software that handles money is held to a higher bar. These three hold on every project.

  • Accurate

    Every transaction is recorded once, traceable from start to finish, and reconciled against its source.

  • Secure

    Credentials and customer data are protected, access is controlled, and every action leaves an audit trail.

  • Dependable

    Systems are monitored in production, and the right person hears about it the moment something needs attention.

How we work

One team from first call to live support.

  1. 1

    Discover

    We learn how money moves through your business today, where it slows down and where errors creep in, then agree a clear scope.

  2. 2

    Build

    We deliver in short cycles, with working software at each step, so you see progress early and can steer it.

  3. 3

    Launch and support

    We go live carefully and stay on afterwards: monitoring, support and improvements as your business changes.

Contact

Tell us where payments slow your business down.

Sysstack is a software studio for payment-driven businesses. We take on a few clients at a time and stay with the software after launch.

hello@s6k.org