Open to global remote opportunities

👋 Hello, I'm

Adetoun
Olayemi

I'm a  Lead Frontend Engineer |

Building scalable, user-first web experiences — from payment gateways processing ₦29B+/month to mentoring the next wave of engineers.

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Adetoun Olayemi
10+ Years Exp.
React / TS
Lead FE
₦29B+/mo
01 — About

Who I Am

Adetoun Olayemi

Experienced Lead Frontend Engineer and Technical Trainer with 10+ years of expertise specializing in JavaScript and modern frontend frameworks. Proficient in building scalable, user-friendly web applications with deep expertise in React, Vue.js, TypeScript, and performance optimization.

I've scaled a payment gateway from scratch to processing over ₦88 billion per quarter (~₦29 billion/month), including cross-border transfers and multi-currency settlement to merchants, led frontend teams, reduced legacy codebases by 50%, and trained hundreds of developers at The Bulb Africa and New Horizons. Currently expanding into backend development with Java (Spring Boot) and React Native.

10+ Years Experience
20+ Projects Delivered
6 Companies
100+ Devs Trained
Lagos, Nigeria toun.olayemi2@gmail.com 07057824862
02 — Skills

Technical Expertise

Frontend Core

HTML5CSS3JavaScript ES6+TypeScript

Frameworks

ReactNext.jsVue.js

Styling & UI Libraries

Tailwind CSSStyled ComponentsChakra UI Material-UIAnt DesignSassFigma

State Management

Redux ToolkitContext APIRTK Query React QuerySWR

Testing & Build Tools

JestReact Testing Library ViteWebpackBabel

Backend & DevOps

Node.jsRESTful APIsJava Spring Boot† GitDockerCI/CD FirebasePostman

Mobile Development

React NativeFlutter†

† Currently learning / early-stage experience

03 — Experience

Career Journey

Lead Frontend Engineer

Etranzact — Credocentral Payment Gateway

Jan 2022 — Present
HybridReactTypeScriptRedux ToolkitFramer Motion
  • Spearheaded the complete redevelopment of the payment gateway from scratch — sole FE Engineer to Lead
  • Scaled transaction volume from ₦10M/month at launch to over ₦88B/quarter (~₦29B/month) at a 98.5% success rate
  • Extended the gateway beyond domestic transactions to support cross-border transfers and multi-currency settlement to merchants
  • Built a rich, reusable component library using Chakra UI and Styled Components
  • Led daily standups, mentored junior devs, and drove coding standards across the team
  • Engineered Social Commerce, Payment Links, Invoices, and Admin Portal features

Lead Frontend Engineer

AkuPay

Feb 2025 — Present
ContractRemoteReactTypeScriptReact Native
  • Leading frontend architecture and delivery for a shared, white-labeled payment platform deployed across five brands — AkuPay, Kiwi, Payswitch, Ganairepay, and Westrapay — each shipping its own merchant portal, backoffice/admin portal, hosted checkout, and ACS authentication portal from a common, themeable codebase
  • Own frontend architectural decisions across the shared component and portal patterns, directing delivery for concurrent brand rollouts
  • Extended the platform to native mobile with a React Native app and built the AkuID authentication/identity SDK, enabling embedded onboarding and checkout flows across the brand portfolio

Frontend Engineer

FrontEdge

May 2023 — Mar 2026
RemoteReactTypeScriptMaterial-UITailwind CSS
  • Inherited a legacy, bloated codebase and reduced its size by over 50%
  • Built new features and restructured existing components for maintainability and scale
  • Contract extended due to significant impact on codebase and team productivity

Technical Trainer

The Bulb Africa

Sept 2022 — Jun 2023
On-SiteJavaScriptTypeScriptReact
  • Led comprehensive training on HTML, CSS, JavaScript, TypeScript and modern web practices
  • Designed curriculum for beginner and intermediate learners with hands-on workshops
  • Provided mentorship and live project demonstrations to prepare students for industry

Frontend Engineer

DuroNetworks

July 2021 — Jan 2022
HybridReactMaterial UI
  • Designed and developed key features for the Split Multi e-commerce platform
  • Took full ownership of the payment-splitting feature end-to-end
  • Applied industry best practices to create scalable and maintainable components

Frontend Engineer & Technical Consultant

Tech 9

Oct 2018 — Present
FreelanceReactTypeScriptTailwind CSS
  • Delivered freelance consulting and frontend development for multiple clients
  • Sourced, managed, and mentored development teams for client projects
  • Led frontend architecture decisions to ensure scalability and long-term maintainability

Computer Science Trainer & Database Admin

Supreme Education Foundation School

Jan 2018 — July 2021
On-SiteHTML/CSS/JSWordPressMySQL
  • Instructed students in web development, animation, and game programming
  • Managed school website and database; introduced automation for timetable generation

Technical Trainer & Web Developer

New Horizons Computer Learning Centre

Feb 2014 — Jan 2018
Full-timePHPJavaScriptMySQLjQuery
  • Taught web design and advanced development covering PHP, JavaScript, MySQL, jQuery
  • Delivered Microsoft Certified Solutions Developer (MCSD) certification training
  • Led both weekday and weekend classes for professionals and individual learners
04 — Projects

Featured Work

A selection of projects across product, freelance, and open work.

Credocentral Payment Gateway Featured

Credocentral Payment Gateway

Spearheaded the complete frontend redevelopment of a payment gateway — from scratch to processing ₦88B+/quarter, including cross-border transfers and multi-currency settlement. Led architecture, component library, and team growth.

ReactTypeScriptChakra UIRedux ToolkitFramer Motion
Live Site
FrontEdge website

FrontEdge

Inherited a legacy codebase and reduced redundant code by 50%. Built new features and restructured architecture for scale. Contract extended for impact delivered.

ReactTypeScriptMaterial-UITailwind CSS
Live Site
New

AkuPay — Multi-Brand Payment Platform

Lead frontend architecture and delivery for a shared, white-labeled payment platform deployed across five brands — AkuPay, Kiwi, Payswitch, Ganairepay, and Westrapay — each with its own merchant portal, backoffice, hosted checkout, and ACS authentication portal from one themeable codebase. Extended to native mobile with React Native and the AkuID identity SDK.

ReactTypeScriptReact NativeFintech
Internal Platform
Debit One website New

Debit One

Etranzact's e-documentation platform (formerly EDDS). Leading frontend delivery, applying the same component library and architectural standards established on the payment gateway.

ReactTypeScriptFintech
Live Site
E-Invoicing portal New

E-Invoicing

Etranzact's e-invoicing platform. Delivered the frontend applying the same component library and architectural standards established on the payment gateway.

ReactTypeScriptFintech
Live Site
eVAS portal login New

eVAS — Virtual Account Service

Merchant-facing portal for eTranzact's Virtual Account Service — KYC/KYB onboarding, virtual account issuance, and settlement reporting — plus a multi-tenant extension for Nigerian electricity DisCos that auto-matches customer transfers to a dedicated virtual account per tenant.

ReactTypeScriptFintech
Live Site
Apex Switch Report portal New

Apex — Switch Report

Reporting portal for users of Etranzact's Switch product to view transaction reports and card/account statements.

ReactTypeScriptFintech
Live Site
New

Pension Gateway

Etranzact's pension platform — PENCOM admin and ezPension merchant surfaces, ported out of Credocentral into a standalone multi-tenant app routed by hostname, serving both surfaces from one codebase.

ReactTypeScriptFintech
Live Site
New

MOS Admin & Merchant Portals

Admin and merchant-facing portals for Etranzact's MOS product line, giving operators and merchants dedicated tools for onboarding, oversight, and transaction management, backed by a dedicated identity SDK and auth portal.

ReactTypeScriptFintech
In Development
ThePluggShop website

ThePluggShop

Fashion e-commerce platform. Initiated the codebase, established the architectural foundation, and mentored the engineer who carried it forward.

ReactTypeScriptStyled ComponentsChakra UI
Live Site

TheYutes

Consulted and initiated the codebase, setting up scalable frontend architecture. Delivered reusable components to accelerate the team's feature development.

ReactStyled ComponentsReduxChakra UI
Live Site
Split Multi website

Split Multi

E-commerce platform enabling customers to split payments for products. Conceptualized and built the full frontend architecture from scratch.

ReactMaterial-UI
Live Site
House of Law website

House of Law Website

Professional website for a law firm showcasing services and case studies, with full mobile responsiveness and cross-browser compatibility.

HTMLCSSJavaScript
Live Site
05 — Currently

What I'm Up To

🔨

Building

  • MOS — Admin & Merchant portals, identity SDK/auth portal · in development
  • Apex — Reporting portal for Etranzact Switch · transaction reports & card/account statements

Lead Frontend Engineer — Etranzact (Merchant Service division)

📚

Learning

Java Spring Boot for backend development, deepening React Native skills for cross-platform mobile, and exploring Flutter — rounding out a full-stack profile.

🔍

Exploring

Web3 frontend architecture patterns, fintech system design at scale, and micro-frontend strategies for large, multi-team codebases.

🎯

Open To

Senior / Lead Frontend roles at global remote-first companies. Teams solving meaningful problems at scale. Technical training and consulting partnerships.

06 — Testimonials

What People Say

"

Adetoun is one of the most talented frontend engineers I've had the pleasure of working with. Her ability to architect scalable systems while maintaining exceptional code quality is remarkable — she elevated our entire team's standards.

Faith Oluokun

Product Manager · AkuPay
"

Working with Adetoun on the Credocentral gateway was an incredible experience. She took full ownership from day one, made bold architectural decisions, and delivered results that scaled far beyond what we imagined at launch.

Stephen Obi

Engineering Lead · Etranzact
"

As a student, Adetoun's training sessions were transformative. She has a rare gift for making complex frontend concepts accessible, and her passion for the craft is genuinely contagious. I landed my first dev role within months.

Brown Memoye

Frontend Developer · Etranzact
07 — Contact

Let's Work Together

Whether you have a project, need a technical consultant, or want to discuss training — I'd love to hear from you.

Email

toun.olayemi2@gmail.com

Phone

07057824862

LinkedIn

Olayemi Adetoun

GitHub

Valenteeena

Location

Lagos, Nigeria