Consulting & Advisory

Let’s solve your backend infrastructure challenges

I help fintech startups and engineering teams build reliable payment systems, core banking infrastructure, and scalable backend architecture they can depend on.

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Samuel Nwabueze — Backend Engineering Consultant

Samuel Nwabueze

Senior Backend Engineer

Services

How I can help

30 minutes

Free Discovery Call

Free

An honest conversation about your backend infrastructure challenges. I'll share immediate thoughts and we'll see if working together makes sense.

  • Architecture pain point assessment
  • Quick wins you can implement this week
  • No sales pitch, no obligation
Book Free Call
Most popular

60 minutes

Technical Consultation

$150

A focused deep-dive on payment systems, core banking architecture, microservice design, or platform engineering. You walk away with actionable recommendations.

  • Architecture review with written notes
  • Technology selection & trade-off analysis
  • Implementation roadmap
Book Consultation

3–5 day delivery

Architecture Audit

From $750

Comprehensive written review of your backend architecture. Includes system diagrams, risk assessment, performance analysis, and a prioritised action plan.

  • Full written report with diagrams
  • Security & reliability risk matrix
  • Scalability roadmap
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Expertise

What I specialise in

  • Payment gateway integration (Paystack, Flutterwave, Stripe)
  • Apache Fineract core banking implementation
  • Idempotent webhook pipelines & event-driven architecture
  • Multi-tenant SaaS platform design
  • Java Spring Boot & NestJS backend systems
  • Distributed systems & microservice decomposition
  • PostgreSQL schema design & query optimisation
  • API security — JWT, OAuth2, RBAC, rate limiting
Samuel Nwabueze at work

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