Flair BuchiOnyebuchi Okonkwo
Onyebuchi Okonkwo, known as Flair Buchi. Black and white portrait.

Flair Buchi

Technical Founder · CTO · Builder

I build systems that know when to act.

Technical founder and CTO. I build products across software, AI, fintech, and infrastructure.

Currently building JustXpend AI. (opens in new tab)

Startup World Cup Nigeria 2026 Winner(Techpression coverage, opens in new tab)
Explore the workRead the writing

The work right now

JustXpend AI

Building financial infrastructure and AI agents so people can manage, move and spend digital assets without the usual crypto friction, including on WhatsApp and mobile.

Xpend sits at the intersection of AI agents, payment systems and digital assets. The product side is simplicity: spend crypto like cash in interfaces people already use. The engineering side is reliability, provider routing, and controlled financial autonomy.

Read the Xpend case studyjustxpend.ai (opens in new tab)

  • AI Agents

    Software that can take actions (transactions and real-world workflows), not merely generate text.

  • Financial infrastructure

    Payment rails, provider integrations, invoicing and B2B APIs underneath everyday money movement.

  • Digital assets

    Making crypto and stablecoins usable in ordinary financial experiences, including on WhatsApp and mobile.

Selected work

What I'm building now, and systems that came before.

All work

AI / FINTECH / CRYPTO

Xpend

Read the case study

An AI fintech platform for sending, receiving and spending digital assets: crypto that can feel like cash in everyday payments. It shows up in WhatsApp, a mobile app, and the rails underneath.

Problem

People need financial tools that work in the interfaces they already use, without the friction of wallets, conversion steps or peer-to-peer trading.

Role

Technical founder / CTO. Architecture, product engineering, and systems that let agents take financial action safely.

Why it matters

The hard part is not chat. It is controlled financial autonomy: agents that can act without unrestricted control over a user's money.

  • PAYMENTS / INFRASTRUCTURE

    Xpend B2B

    Case study

    B2B payment infrastructure and API integrations that help businesses accept crypto, including invoicing, without needing blockchain expertise.

    Businesses want the utility of digital assets, not the complexity of wallets, rails and provider failure modes.

    RoleTechnical leadership across payment flows, provider integrations and B2B product surfaces.

    Interesting becauseMaking crypto disappear into ordinary business payments is an infrastructure problem dressed as a product problem.

Also shipped

  • NETWORKING / SECURITY / INFRASTRUCTURE

    KeenVPN

    Privacy-focused networking infrastructure spanning mobile, desktop and browser environments.

    Case study

A few facts.

Startup World Cup Nigeria 2026 Winner(Techpression, opens in new tab)

JustXpend / Xpend won Startup World Cup Nigeria at Tech Unite Africa 5.0 in Lagos, and advances to the global finals in San Francisco.

  • 8+ years building software

    Full-stack engineering, blockchain, fintech, infrastructure and product, converging into the current work.

  • AI · fintech · crypto · infrastructure

    AI agents, digital assets, B2B rails and payment workflows across WhatsApp and mobile: the systems behind Xpend.

Writing

Notes from building Xpend and the systems underneath it.

All writing

6 more essays on the writing page

Earlier archive: 2020 Medium piece on S3 uploads (opens in new tab).

About

I'm Onyebuchi Okonkwo. Most people online know me as Flair Buchi.

I'm a technical founder and builder from Nigeria. I've spent years working across full-stack engineering, blockchain, fintech, infrastructure and product, not as a collection of job titles, but as one continuous practice of shipping systems that have to work.

Today I'm building at JustXpend AI, where we're working on AI-powered financial infrastructure and agents that can take action on behalf of users. The interesting problem is controlled autonomy: how software can move money without being handed unrestricted control over it.

The fuller story
Onyebuchi Okonkwo, known as Flair Buchi. Black and white portrait.
Flair BuchiOnyebuchi Okonkwo

Now

A living snapshot.

Open /now
Thinking about
How intelligent software can safely interact with real-world financial systems.

Want to talk?

Building something difficult, or thinking through a system that matters? Get in touch.

Get in touchEmail directly

Elsewhere