About
John Ossai
I'm a Frontend-focused Software Engineer based in Abuja, Nigeria, with 5+ years of experience building clean, fast, and scalable web applications.
I work mainly with React, Next.js, and TypeScript, and I'm comfortable handling everything from UI architecture and API integration to performance tuning and component design.
I've shipped products across energy, healthcare, and development finance — from national government dashboards to telemedicine platforms — and I work well in both team and independent settings.
Currently, I lead frontend architecture at EMRC, setting coding standards and reviewing UI decisions across a 5-person engineering team.
Experience
Where I've worked
Lead Frontend Developer & UI Architect
Energy Markets and Rates Consultants (EMRC) · Abuja, Nigeria
- ·Led frontend architecture with Next.js, TypeScript, and React across a 5-person engineering team — set coding standards and reviewed all major UI decisions.
- ·Built a modular component library with 40+ reusable components, cutting development time by 30%.
- ·Delivered several public-sector platforms including national electricity dashboards, utility monitoring tools, and a data governance training platform.
- ·Built a full-stack custom CMS using TypeScript, Node.js, and Supabase — covering content modelling, editorial UI, versioning, webhooks, and Paystack billing.
Frontend Developer & Technical Lead
CosmicForge HealthNet · Lagos, Nigeria
- ·Led frontend development of a telemedicine platform — 60+ screens and 300+ components built with Next.js, following atomic design principles.
- ·Delivered modules for consultations, pharmacy integration, patient management, lab connectivity, and AI-powered clinical tools.
- ·Worked with the backend team to align APIs with frontend architecture, improving integration efficiency by 20%.
Frontend Developer & Performance Engineer
Macgroup Technologies · Las Vegas, USA (Remote)
- ·Cut First Contentful Paint by 59% (3.9s → 1.6s) through SSR improvements and architectural refactoring.
- ·Kept Lighthouse scores at 97+ while building complex animated interfaces with GSAP and Framer Motion.
- ·Set up frontend performance monitoring to catch and fix bottlenecks early.
- ·Delivered accessible, well-tested web interfaces across multiple client projects using peer review and automated testing.
Achievements
By the numbers
-59%
FCP Improvement
3.9s → 1.6s via SSR & refactoring
300+
Automated Tests Shipped
Cut manual QA time by 35%
100%
Sprint Delivery
10 consecutive cycles, distributed team
20+
Developers Mentored
90% project completion rate
9+
Digital Products Shipped
Energy, healthcare, dev finance
40+
Reusable Components Built
Cut dev time by 30% at EMRC
Education
B.Sc., Library and Information Science
Federal University of Lafia, Nasarawa State, Nigeria · 2024
GPA: 4.46 · Second-best graduating student in faculty and department
Certifications
- Advanced Figma UI/UX Design (2025)
- Data Science and Machine Learning — In Progress (2025)