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Harry KeumezeuSenior software engineer

HarryKeumezeuFeujio

Senior software engineer

7+ years building web platforms for healthcare, infrastructure and network security, from requirements to production.

Based in Accra, Ghana. Working remotely with Paris-based teams since 2021.

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Portrait of Harry Keumezeu

About

I’m a full-stack engineer who ships business-critical systems end to end: understanding the need, designing the data model and APIs, building the interface and seeing it through to production.

On the frontend I care about performance, accessibility (WCAG) and components that stay easy to change. On the backend I write robust, well-tested APIs and keep the busy endpoints fast.

Most recently at Cyberdian Group, I built features for a network security platform used by European clients, inside a micro-frontend architecture that spans React, Nest.js, Go, Python and several data stores.

Time zone
GMT, one or two hours behind Paris
Languages
French (native), English (fluent)
Works with
Remote teams, in Europe and beyond
Off screen
Football, reading and games

Experience

Roles in order, newest first. The two roles at The Coding Machine sit on their own branch.

  1. Senior Software Engineer

    –

    Cyberdian Group, Paris, remote

    • Owned feature delivery in a micro-frontend architecture for a network security platform serving European clients.
    • Worked on backend and data-pipeline components that process security event data at scale, with cross-functional teams in a French-speaking environment.

    Stack:ReactNest.jsGoPythonPostgreSQLMongoDBClickHouseNeo4jAirflow

  2. Software Developer Consultant

    –

    The Coding Machine, Paris, remote

    • Designed, built and deployed a project management platform for SADE, a global network and infrastructure company, including interactive scheduling views.
    • Load- and performance-tested the platform with k6 under realistic usage before rollout.

    Stack:SymfonyVue.jsMySQLDockerCypressBryntumMatomok6

  3. Freelance Software Developer

    –

    The Coding Machine, Paris, remote

    • Delivered web applications for several clients, taking each one from requirements to production deployment.

    Stack:ReactVue.jsNuxtLaravelSymfonyMySQLMongoDB

  4. Software Developer

    –

    Pether Solutions, Douala, Cameroon

    • Architected a Radiology Information System with PACS integration and an in-browser image viewer.
    • Architected a multi-tenant pharmacy management platform with third-party API integrations and a consistent experience across tenants.
    • Maintained and updated the previous Laravel/AngularJS pharmacy platform in production while its multi-tenant successor was being designed.

    Stack:LaravelAngularAngularJSMySQL

Projects

Platforms built for companies in network security, infrastructure, housing, healthcare and more, alongside products of my own.

  • Cyberdian Group2025–2026

    Dane

    Network security policy management platform used by European clients.

    Web application

    Stack:ReactNest.jsGo

  • Personal product

    WellRx

    Pharmacy management system for multi-branch pharmacies, with an AI assistant and overnight engines that flag expiring stock and draft purchase orders.

    I designed and built the whole product: the Laravel API, the Vue.js app, the queues and real-time updates, the AI assistant (natural-language reports, chat, a daily briefing per branch) and the marketing website.

    Web application

    Stack:LaravelVue.jsTypeScript

  • Personal product

    Document Q&A chatbot

    An embeddable RAG chatbot that answers website visitors’ questions from a company’s own documents.

    I built the FastAPI backend, the Vue.js dashboard where clients upload documents, and the JavaScript widget. Each client gets its own vector collection and S3 prefix, so documents never cross from one client to another.

    Web application

    Stack:FastAPIChromaClaude

  • SADE, with The Coding Machine2023–2024

    Prologue

    Project management platform for SADE, a global network and infrastructure company, with interactive scheduling views.

    Web application

    Stack:SymfonyVue.jsBryntum

  • Procivis, with The Coding Machine

    Procivis

    Internal web application for Procivis, a leading cooperative housing and real estate network in France.

    Web application

    Stack:SymfonyNuxt

  • Econocom, with The Coding Machine

    Econocom

    Custom digital supply chain and business application.

    Web application

    Stack:LaravelLaravel Nova

  • With The Coding Machine

    Elite Berbère

    Dating platform for the Berber community in France.

    Web application

    Stack:SymfonyReactStripe

  • Pether Solutions2019–2021

    PetherPharma

    Multi-tenant pharmacy management platform with third-party API integrations. I designed it while maintaining and improving the previous platform, built with Laravel and AngularJS.

    Web application

    Stack:LaravelAngular

  • Pether Solutions2019–2021

    PetherRIS

    Radiology Information System with PACS integration and an in-browser image viewer.

    Web application

    Stack:LaravelAngularOHIF Viewer

  • Personal project

    GearTrove

    Concept storefront for car parts and accessories, with a vehicle garage, cart and checkout flow.

    Website

    Stack:Next.jsTypeScript

  • Personal project

    Harry & Co

    Concept website for a corporate law firm, with practice areas, team profiles and articles.

    Website

    Stack:NuxtTypeScript

Skills

Core engineering
System design (scalability, reliability, maintainability), API design (REST, GraphQL), OOP, SOLID, DDD, event-driven architecture, performance and security best practices
Backend
PHP (Laravel, Symfony), Nest.js, Python (FastAPI), Go, WebSocket
Data
PostgreSQL, MySQL, SQLite, MongoDB, Neo4j (graph), ClickHouse (analytics), Redis (caching), Airflow (data pipelines)
AI
RAG, LLM integration (Claude), vector search (Chroma), document ingestion (pypdf)
Frontend
Vue.js/Nuxt, React/Next.js, Angular, TypeScript, component architecture, accessibility (WCAG), performance (bundle size, lazy loading, tree-shaking)
Testing
TDD, unit, integration, performance and load testing (k6), PHPUnit, Vitest, Jest, Playwright, Cypress
Cloud and DevOps
AWS, Docker, CI/CD, Linux, Nginx, Traefik, Grafana
Leadership
Mentoring and onboarding junior engineers, technical decision-making, trade-off analysis, communication across teams and with clients

Education and certifications

Education

Bachelor’s degree in computer science and networks

Université des Montagnes, Bangangté, Cameroon

Certifications

  • Certified Vue.js Developer, Level I

    Certificates.dev,

  • Certified Pinia Master

    Vue School,

  • CCNA Routing and Switching

    Cisco Networking Academy,

Contact

Hiring a senior engineer, or planning a new platform? Let’s talk.

Email is the best way to reach me. I’m also on LinkedIn and GitHub.

LinkedIn GitHub