Chukwuduzie Blaise

Work

Products I've built end to end, and systems I've rebuilt to hold up under real load. Each case study starts with the outcome and goes as deep as you want.

01 · Fintech

Mono-Parser

Software Engineer · Feb 2026 - Mar 2026

Full credit scoring and decisioning engine for Nigerian Lenders and Fintechs. Powered by Mono Open Banking.

Mono API, Nest.js, PostgreSQL, Redis, BullMQ, Next.js
Mono-Parser screenshot
02 · Payments

Kanall

Fullstack Engineer · June 2026 - July 2026

Kanall is a Multi-tenant virtual account infrastructure, create dedicated NUBANs, reconcile payments and deliver webhooks at scale. Perfect for FMCG businesses.

Go, PostgreSQL, TypeScript, React, TanStack Query
Kanall screenshot
03 · Product · SaaS

Invoicing app for small businesses

Solo engineer, design to launch · 2026

A founder had an idea and a deadline. I built the whole product, from the web app to payments and hosting, and it launched in seven weeks with paying customers in the first month.

Launched in 7 weeks · production
Next.js, NestJS, PostgreSQL, Paystack, AWS
04 · Fintech · Payments

Payout orchestration for a digital lender

Lead backend engineer · Oct 2025 – Mar 2026

Failed payouts down from 4.1% to 0.6%, zero double payments, and finance no longer reconciles by hand.

4.1% → 0.6% failed payouts · production · 90 days
NestJS, Go, PostgreSQL, Kafka, Redis, AWS
05 · Data · Streaming

Real-time event pipeline

Backend engineer · 2024 – 2025

Reports that took a night to compute now update in under a minute. The pipeline absorbs traffic spikes without losing data or waking anyone up.

14k events/s sustained · p95 lag 38s · production
Go, Kafka, PostgreSQL, Docker
06 · SaaS · Infrastructure

Multi-tenant platform

Backend lead · 2023 – 2024

One codebase serving hundreds of businesses, each with its own data walled off. New customers are onboarded in minutes instead of a week of setup.

340 tenants · 0 cross-tenant incidents · 18 months
FastAPI, PostgreSQL, Redis, AWS
07 · Product · Marketplace

Booking platform for clinics

Full-stack engineer · 2022

Patients book and pay online instead of calling. Clinics stopped losing appointments to no-shows once deposits and reminders went live.

No-shows down 38% · production · 6 months
Next.js, Gin, MySQL, BullMQ

Building something? Tell me about it.

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