I'm a Senior Frontend Engineer specialising in scalable, high-performance web applications across the modern JavaScript ecosystem — Vue, Nuxt, React, Next.js, and TypeScript. For the last six years I've worked where frontend quality has real financial and civic consequences: payment processors, payroll engines, and biometric identity systems used by governments and financial institutions.

I lead frontend architecture decisions, mentor engineers, and collaborate closely with product, backend, and QA teams — with a focus on performance budgets, maintainability, accessibility, and the long-term health of the systems I ship.

consttheo={fullName: "Theophilus O. Iyonor",role: "Senior Frontend Engineer",location: "Lagos, Nigeria · Remote (Global)",currentFocus: ["React","Next.js","Vue.js","Nuxt.js","TypeScript","React Native"],architecture: ["SPA","PWA","Micro-frontends","REST APIs"],toolchain: ["Vite","Redux Toolkit","React Query","Pinia","TailwindCSS"],hobbies: ["Football","Music","Hiking","Reading","Open Source"],}

Mar 2025 - Present

• Lead frontend engineering across enterprise products serving government and financial institutions
• Architect SoftSuite, an HRM platform used by 10+ organisations, supporting payroll operations exceeding ₦200M in processed salaries
• Build and optimise frontend systems for SoftPay, a payment processor handling ₦1B+ in monthly transaction volume
• Engineer core UI modules for EbioVerify, a biometric verification platform supporting 215,000+ public-sector employees across Oyo, Ekiti, and Niger states
• Mentor engineers and enforce scalable architecture patterns that reduce regressions and improve maintainability

Feb 2025 - Present

• Architect core frontend features for a sales-management platform serving 1,000+ active retail users, targeting 99%+ uptime
• Design reusable, type-safe Vue + TypeScript component systems that accelerate product iteration
• Drive performance optimisation and bug-reduction initiatives toward a near-zero-regression production environment

Nov 2023 - Feb 2025

• Developed scalable frontend modules across multiple enterprise platforms serving 100k+ users
• Built SoftSuite HRM frontend with React, Vite, and SCSS within a 13-member cross-functional team; integrated Redux Toolkit and React Query
• Built and maintained the SoftPay frontend with Vue, Vite, and TailwindCSS, including dynamic transaction-tracking components with Pinia
• Led EbioVerify frontend (React, Vite, TailwindCSS) and contributed NestJS REST APIs; integrated AFIS biometric workflows with Secugen fingerprint devices

Jun 2022 - May 2023

• Redesigned the HTML, CSS, and JavaScript curriculum for hybrid learning, improving course-transition efficiency and comprehension
• Delivered hands-on web development training to 200+ corps members through NYSC SAED programmes
• Supported business growth through technical consultations, contributing to a 35% increase in monthly net income

Jan 2022 - May 2022

• Built modular UI components with React, Next.js, SCSS Modules, and TailwindCSS, cutting feature development time ~25% through reusable design systems
• Collaborated asynchronously across time zones, contributing to a ~20% improvement in team delivery efficiency
• Streamlined deployments with Vercel CI/CD, reducing manual release overhead

Mar 2021 - Nov 2021

• Translated Figma prototypes into scalable applications with Nuxt.js, Vuetify, Vue-Chart.js, and Leaflet
• Implemented interactive data-visualisation and mapping features for the EARWAC coastal-flood platform
• Partnered with backend engineers on REST API integration and data-flow optimisation

Apr 2020 - Dec 2020

• Developed responsive web templates with React and modern CSS, accelerating delivery by 15%
• Shipped a full Vue.js feature implementation with Vuex and GraphQL within 4 weeks
• Improved page speed by 25% through asset optimisation and frontend performance work across 6+ projects

Vue • Nuxt • TailwindCSS • Pinia

• Secure payment processor that streamlines collections through versatile payment channels and efficient bulk payouts
• Handles ₦1B+ in monthly transaction volume with regulatory-grade reliability
• Role: Frontend lead · 🔗 softpay.ng

React • NestJS • TypeScript • TailwindCSS

• Biometric employee-verification platform for secure onboarding and identity management, integrating with HRMS and FIS systems via AFIS and Secugen devices
• Verifies 215,000+ public-sector employees across three Nigerian states
• Role: Full-stack (frontend lead) · 🔗 ebioverify.com

React • Next.js • TypeScript • Redux Toolkit • React Query

• Comprehensive HR ERP automating people management, payroll, self-service, and performance management from hiring to retirement
• Used by 10+ organisations; supports ₦200M+ in processed salaries
• Role: Frontend lead · 🔗 softsuite.com

Vue.js • TypeScript • TailwindCSS

• Sales-management web app for small retail businesses that streamlines operations and turns sales data into actionable insights
• Serves 1,000+ active retail users with 99%+ uptime targets
• Role: Senior frontend engineer · 🔗 leyyow.com

• B.Tech, Industrial Mathematics — Federal University of Technology, Akure (2015 – 2020)
• NYSC Batch 22B1 — Ekiti State (2022 – 2023), served as an ICT instructor training 200+ corps members in web development