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TL
Tomisin Leshi

LAGOS · –· TECHNICAL LEAD & PRODUCT ENGINEER

I lead the teams that take products from zero to one.

For:

Co-founder and CTO at LINK GLOBAL, where I grew engineering from just me to four engineers and built payment systems that have moved three to four million dollars. I also help founders shape the idea before a line of code is written.

Taking on: technical lead roles, product advisory, payment and corridor launches
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$3M+moved through systems I built
1 to 4engineers: grew the LINK team from just me
10+payment corridors live
1stBase Batch hackathon, Europe

At LINK we are scaling a multi-corridor routing layer and public API that partners use to move money across 10+ African payment corridors without integrating each provider themselves. We are also building BridgeCore: an event-driven payments core designed so no payment is ever lost and no transaction runs twice.

See the work→

I start with the customer and the problem, not the code. We cut the idea to the smallest version someone would pay for, pick a stack the team can run, then build in short releases. At LINK that took us from a v1 retail app to an API platform.

See services→

Yes, if it is early and moving. I take on a small number of lead and advisory projects each quarter, across fintech, SaaS and AI. The fastest way to find out is a short call.

Book a call→

Every project starts small: a short call, then a fixed first step like a one-week product sprint or a corridor plan. You get something written and useful before you commit to a full build.

See services→

01 · SERVICES

Where I can help

Two ways to work with me. Both start with a small, fixed first step.

01

A technical lead for your zero-to-one product

You have an idea or an early product, but nobody owns the technical decisions, the team and the roadmap. Things get built, but not the right things, and not in the right order.

For: Founders building fintech, SaaS or AI products without a CTO, and teams between engineering leads.

  • →The idea shaped into a first version worth building: the customer, the problem, and what to cut.
  • →Architecture and stack decisions made early and written down, so the team is not guessing.
  • →Your first engineers hired, mentored and working to clear review and release habits.
  • →Version one shipped, with a roadmap for what comes next.

Done before: grew LINK's engineering team from just me to four, led the product from a v1 retail app to an API platform, and took Warmline from idea to a live product.

How we start: Start with a one-week product and architecture sprint: a written scope, a build plan and a team plan you keep either way.

Fractional lead (part-time) or advisory sessions.

Talk about your product

02

Launch payments in new markets, and settle the same day

Every new market means a new bank partner, a new compliance flow and a new payout integration. Then money sits pre-funded in each country, and weekend payments wait until Monday.

For: Fintechs, wallets, marketplaces and SaaS products adding payments in new countries, in Africa or anywhere else.

  • →A corridor plan: which providers, which settlement path, which compliance steps.
  • →On-ramp, off-ramp and liquidity provider integration, built and tested.
  • →Routing that switches provider when one fails, so payments keep moving.
  • →Stablecoin settlement and treasury flows that turn digital dollars into local money, any day of the week.

Done before: LINK routing layer, $3M+ moved across 10+ corridors; a naira stablecoin with $2M+ on-chain volume; a Stellar anchor that onboarded 3,000+ users.

How we start: Start with a one-week corridor plan.

Plan a market launch

02 · WORK

Products and systems I have built

Payments is where I have gone deepest. It is not the only thing I build.

Payments infrastructure

Stellar SEP-24 anchor

live

Engineering, LINK GLOBAL

Problem

Wallets in Nigeria needed a compliant way for users to move between naira and digital dollars.

Built
  • →A SEP-24 anchor on Stellar handling interactive deposit and withdrawal flows between NGN and stablecoins, with KYC built in.

Helped partner wallet Beans onboard 3,000+ Nigerian users through NGN on-ramp and off-ramp.

Naira-backed stablecoin

live

Engineering, LINK GLOBAL

Problem

Moving naira on-chain meant converting to dollars first.

Built
  • →A naira-backed stablecoin issued across five networks: Stellar, Ethereum, Polygon, Arbitrum and Base.

$2M+ in on-chain volume.

Also built

BridgeCorein progress

An event-driven payments core: API to worker handoff over Kafka, the outbox pattern so no event is lost, and an idempotency layer so no payment runs twice.

Checkout by LINKlive

On-chain merchant checkout so businesses can take payment in stablecoins instead of fiat, on Base and Solana.

→

Beyond payments

Warmlinelive

AI-written outreach for founders who have not hired sales yet. Every message is reviewed by a person before it sends, so it reads like the founder wrote it.

TypeScriptPostgreSQL (Neon)ResendAI
→
Voyzavalidation

Travel planning for African passport holders: destinations you can actually get a visa for, flights that fit your budget, and hotel bookings for your visa application. Waitlist open.

TypeScriptReactAI
→
Property management platformframework

Designed the skeleton framework for a property and facility management platform: the data model, user roles, KYB onboarding and the module structure for facilities, tenants and invoicing.

Next.jsTypeScriptPostgreSQL
himylink AI dashboardcompleted

Built Python/Django endpoints for an AI business dashboard serving 2K+ concurrent users. Shipped and handed over in 2021.

PythonDjango
StellarBriefhackathon

Hackathon project for Stellar Hacks: Agents. An AI agent that pays for data per request with x402 micropayments, built with the Claude SDK and tested on Stellar testnet.

TypeScriptExpressClaude SDKStellar

03 · STACK

My stack

Languages
TypeScriptPythonJavaScript
Backend
Node.jsExpressHonoDjango
Data and messaging
PostgreSQLMongoDBRedisKafkaPrisma
Infrastructure
DockerAWSGitHub ActionsNginxTurborepo
Payments and chains
StellarSolidityBaseSolana
Frontend
Next.jsReactTailwind CSS
AI integration
Claude APIOpenAI APILangChain

Most bugs live in the gaps: between your API and the next service, between an event and its handler, between what you log and what actually happened. The stack I reach for makes those gaps visible.

04 · PATH

Frontend hire to CTO in just over two years.

Five years at LINK, from the first screens to the routing layer.

Co-founder and CTO

  • Own the technical direction of the payments platform: architecture, infrastructure, reliability and the engineering roadmap.
  • Designed the routing layer that picks the best provider for each currency pair. Three to four million dollars has moved through it.
  • Grew the engineering team from just me to four engineers across backend, frontend and security.
Dec 2023 to now

Technical lead

  • Secured three Stellar Community Fund grants for infrastructure work.
  • Sat in on provider and partner negotiations and architecture reviews.
Jul 2023 to Dec 2023

Full stack engineer

  • Moved the v1 retail product onto the upgraded platform through an API service.
  • Set up the architecture and code review practices the team still uses.
  • Acted as the bridge between founding decisions and day-to-day delivery.
Apr 2022 to Jul 2023

Frontend developer

  • Built the product's first customer-facing screens, including onboarding and transaction flows for the v1 retail web app.
Aug 2021 to Apr 2022

Previously

Strich, IncBackend engineer
Feb 2022 to Jul 2022
himylink AIFull stack engineer, part-time
Aug 2021 to Dec 2021
Cyprus RoboticsJunior software engineer, part-time
Nov 2020 to Apr 2021
Download full CV →

05 · WRITING

I write about building products, founders, and how money moves

06 · CONTACT

Building something new? Let's talk.

Fintech, SaaS or AI, I take on a small number of lead and advisory projects each quarter. The fastest way to start is a short call.

Book a call