Hire a Payment Systems Engineer

What that looks like in production

Selected payment-systems work:

• Impact Factors

  Protected recurring giving and subscription revenue from silent failures: fixed a renewal race that could drop active subscriptions mid-payment, and added recovery that reconciles failed renewals without ever double-charging donors.

• Primus Learning PLC

  Made a crowdfunding platform's core "all-or-nothing" promise real: re-architected money flow so backer funds are held in escrow and released to creators only when a campaign hits its goal — otherwise every backer is automatically refunded — protecting both sides of the transaction.

• Primus Learning PLC

  Eliminated a bug that double-counted campaign totals and tax figures — reworked payment processing so a duplicate or retried provider notification can never be counted twice, verified under concurrent load.

• Primus Learning PLC

  Built the compliance controls a money-moving product needs to operate legally: a tamper-proof audit trail, anti-money-laundering caps, and automated tax-threshold reporting.

• SaaS Simplified

  Founded and lead a senior software agency — 10+ production platforms shipped across fintech, remittance, ticketing, and education, including 5 apps published to the App Store and Play Store.

• SaaS Simplified

  Built a cross-border remittance app (live on both stores, 5 corridors into Central Africa) that guarantees senders the exact rate they saw — the exchange rate is locked at submission with money-safe decimal handling and duplicate-transfer protection, so diaspora transfers land correct to the last franc.

• SaaS Simplified

  Authored stateledger, an open-source payment state-machine library for Node/TypeScript (3 packages on npm) — the reliable equivalent the Node ecosystem was missing for handling payment workflows.

• SaaS Simplified

  Also shipped a pan-African admissions platform letting students apply and pay by mobile money across 10 countries without traveling to campus; a mobile-money event-ticketing platform with fraud-resistant QR tickets; and PulseLab, a real-time webhook debugger.

Full stack

“I've had the opportunity to work with Enow on a couple of projects and I must say I'm marveled by his high level of competence. I would recommend him to anyone looking for a full-stack web developer.”