John Kargbo

About John Alpha Kargbo

John Alpha Kargbo is a senior full-stack developer based in Freetown, Sierra Leone. He builds web and mobile products with React, Next.js, Node.js and PostgreSQL for founders and teams in Africa, the US, the UK and Europe, and works from GMT, which overlaps a full working day with London and Europe.

Quick facts

Name
John Alpha Kargbo
Role
Senior full-stack developer (freelance)
Based in
Freetown, Sierra Leone (GMT, UTC+0)
Works with
Founders and teams across Africa, the US, the UK and Europe
Core stack
JavaScript, TypeScript, React, Next.js, Node.js, Laravel, Angular, Vue.js, PostgreSQL, MongoDB, GraphQL, Redis, Docker, AWS, Tailwind, Firebase
Services
Web Development, Mobile Apps, UI / UX Design, API & Backend, DevOps & Cloud, Consulting
Pricing
Plans from $29 per month; fixed-scope projects are quoted up front.
Contact
info@johnalphakargbo.blog
Elsewhere
GitHubFacebookTikTok

What he builds

  • Web Development

    High-performance web apps with React, Next.js and a type-safe API layer.

  • Mobile Apps

    Cross-platform iOS & Android apps that feel native and ship fast.

  • UI / UX Design

    Research-led interfaces, prototypes and design systems in Figma.

  • API & Backend

    Robust REST & GraphQL APIs, databases and auth done right.

  • DevOps & Cloud

    CI/CD pipelines, containers and zero-downtime deploys on AWS.

  • Consulting

    Architecture reviews, code audits and technical mentoring.

See every service and what is included →

Selected work

  • ERP Organization Management System
    Lead Full-Stack Developer / UI-UX Designer · Empower Sierra Leone Foundation (ESLF) · 2026

    A complete design system and component library for a B2B SaaS, shipped from Figma tokens to production React.

  • Fintech Analytics Dashboard
    Lead Frontend Engineer · Northbeam · 2025

    A realtime analytics dashboard for a fintech processing 1M+ events per day, with sub-second interactive charts and role-based access.

  • Marketplace Commerce Platform
    Backend Lead · ShopHub · 2024

    A multi-vendor marketplace handling secure split payments, payouts and webhooks across hundreds of sellers.

  • Pulse Health Tracker
    Mobile Developer · HealthFirst · 2023

    A health-tracking app syncing wearable data into clean trends, goals and gentle nudges.

  • Cinematic 3D Full-Stack Developer Portfolio
    Full-Stack Developer · John Alpha · 2025

    My own portfolio: a cinematic Next.js site with a 3D globe hero, an AI assistant for visitors and a full admin dashboard behind it.

  • Online Entrance Exams & Assessment Platform
    Lead Full-Stack Developer & UI/UX Designer · Mother Patern College of Health Sciences · 2026

    An online platform for running entrance examinations and assessments for Mother Patern College of Health Sciences, with a dashboard for candidates, exams and security alerts.

How a project runs

  1. 01
    Discovery

    We define goals, scope and success metrics together.

  2. 02
    Strategy

    Technical architecture and project roadmap with clear milestones.

  3. 03
    Design

    Wireframes and prototypes you can click before any code.

  4. 04
    Development

    Iterative sprints with weekly demos and live previews.

  5. 05
    Testing

    QA, performance audits and accessibility validation.

  6. 06
    Launch

    Deploy, monitor and hand off with full documentation.

Frequently asked questions

What's your typical project timeline?+
Most web apps ship in 4–8 weeks depending on scope. I work in weekly sprints with a live preview after each one, so you always see progress.
Do you work with existing teams?+
Absolutely. I slot in as a senior engineer — pairing, reviewing PRs and unblocking — or lead a build end-to-end. Whatever your team needs most.
How do you handle pricing?+
Fixed-scope projects are quoted up front; ongoing work runs on a monthly retainer. No surprise invoices, and you can cancel a retainer anytime.
What happens after launch?+
Every project ships with documentation and a handoff call. I also offer maintenance retainers for monitoring, fixes and new features.
Which time zones do you cover?+
I'm based in Freetown, Sierra Leone (GMT), which overlaps a full working day with London and Europe and several hours with the US East Coast each morning. I keep flexible hours and have shipped with teams from London to Singapore — async-first, with overlap when it counts.
Can you take over a stalled project?+
Yes — rescuing half-finished builds is a big part of my work. I start with a short audit, then give you an honest plan to get it across the line.
Do you work with clients outside Sierra Leone or Africa?+
Yes — most of my clients are in the US, UK and Europe. Being based in Freetown, Sierra Leone means senior-level React, Next.js, Node.js and PostgreSQL work at a fraction of Western day rates, with real time-zone overlap and no agency markup.

Work together

Tell him about the project and you will get a reply by email.

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