Chukwuduzie Blaise
Software engineer · Problem solver · Taking on new Projects

I build full products, with the backend done right.

Web apps and APIs end to end, from interface to infrastructure. My depth is the hard part: payments, data and scale.

Email meSee the work
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Results in production

Every number states how it was measured, where and when.

6weeks
From idea to a client's logistics app live in production
Production · kickoff to launch · Aug – Sep 2026
5,000users
Logistics app grown from its first user, with 1,000 daily active users
Production · counted in the production database · Jan – Jul 2025
500+concurrent users
Customer-support chat on WebSockets, running stably
Production · counted in the production database · Jan – Jul 2025
60%lower cost
Moved a startup from AWS to self-hosted servers, with p99 latency held at 150ms
Production · monthly bill before vs after; p99 from Grafana · Mar – Aug 2025

Selected work

All projects →
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.

Read case study →
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.

Read case study →
Kanall screenshot
03 · 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
Read case study →Live site ↗

Work with me

Not sure which fits? Email me what you're building and I'll tell you honestly.

Product build
Your product built end to end, from MVP to launch. For founders with an idea and a deadline.
$3k – $5k
Per project · 6 – 8 weeks
Embedded engineer
Solid engineering capacity inside your team. For startups that need to ship more, reliably.
$2.5k
Per month · contract
What's included and how it works →

What clients say

“He found the reason our payouts were failing in a week, then fixed it so it stayed fixed. Finance noticed before engineering did.”
Placeholder NameCTO, lending startup
“Rare mix: deep on distributed systems, and he explains trade-offs so the whole team can make the call.”
Placeholder NameEngineering lead, fintech
“We went from a Figma file to paying customers in under two months. He handled everything technical so I could focus on selling.”
Placeholder NameFounder, SaaS startup
“Clear updates, no surprises, and the system still runs without him babysitting it. That is what I want from a contractor.”
Placeholder NameHead of Product, logistics

Writing

All articles →
Idempotency keys are not enough: designing payout retries that never double-pay
How a retry storm double-paid customers, and the ledger-first design that made it impossible.
Sep 2026 · 2 min
Kafka consumer lag as a product metric
Why the delay between an event and a dashboard matters to users, and how we brought it under a minute.
Jul 2026 · 1 min
Row-level security in Postgres for multi-tenant SaaS, with numbers
Isolating 340 tenants in one database: the setup, the query overhead we measured, and the gotchas.
May 2026 · 1 min

Building something? Tell me about it.

I reply within one working day. Send a few lines on what you're building and where it hurts.

hello@chukwuduzie.dev

Email me

I reply within one working day.