Senior backend engineer with deep payments expertise.

Senior Software Engineer · Full-time · US · Remote

• →Became the primary backend engineer for a multi-tenant faith-community platform used by churches and ministries (giving, community, messaging) — the person new features and cross-team backend issues route to, across 15+ services.
• →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.
• →Secured customer organizations' admin controls against takeover — rebuilt role authorization across every service and closed a path where non-admins could grant themselves admin rights.
• →Made platform data trustworthy under load: a user action like a deletion or role change now propagates once and correctly across every service, even when events are retried or arrive out of order.

Software Engineer · Contract · US · Remote

• →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.
• →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.
• →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.
• →Made automated trading safe on a custodial trading platform — a crash-safe execution engine with built-in guardrails (spending caps, kill-switches, auto-pause) and hardware-key-protected withdrawals, so trades can't run away or exceed set limits.

Founder & Lead Engineer · Cameroon · Remote

• →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.
• →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.
• →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.
• →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.

Mobile Engineer · Contract · Switzerland · Remote

• →Gave a diaspora dating app a reliable foundation to scale on — led its migration from MongoDB to PostgreSQL, restructuring the entire data model (33 models, 150+ endpoints) for enforceable integrity.
• →Stopped subscription revenue leaking from forged or unverified receipts by adding cryptographic verification across Apple, Google, and card payments.
• →Rebuilt match discovery on a location-aware scoring engine; the product reached 1,000+ users in its first month.

Software Engineer · Cameroon

• →Rebuilt AECO Education and Saint Louis University's digital presence (30% engagement lift) and built the student-application system that grew into a pan-African admissions platform.

CTO · Cameroon · Full-time

• →Led a team of 3 engineers and 10 interns; owned technical scoping of all incoming projects.
• →Built the digital platform for a 5-company conglomerate that generated 3M FCFA in its first two months and drove a 30% annual revenue increase.
• →Built RHIIBMS, a school-management system that cut admission processing by weeks with 100% budget-calculation accuracy.