HELLO, I'M CONSTANTIN

I DESIGN.
I CODE. I SHIP WEB PRODUCTS

Fullstack Developer, Next.js & React expert, Django & Python backend, Cybersecurity enthusiast, AI & data curious

A passionate fullstack web developer building robust, secure and genuinely pleasant applications — from the first Figma screen all the way to production.

contantin@valyon.co
Constantin ZOUNMEVO
FullstackNext.js · Django
SecurityWeb & audit
Available for freelance
0Projects delivered
0+Years of experience
0Clients & companies
0Technologies mastered
Constantin ZOUNMEVO
ABOUT ME

I build solutions, not just screens

I'm Constantin ZOUNMEVO, a fullstack web developer. For over three years I've helped startups and companies turn their ideas into reliable web products — business CRMs, time-tracking apps, management platforms and showcase sites.

Autonomous and rigorous, I invest fully in every project to deliver clean, tested and maintainable code. Currently studying for a Master's degree at IFRI (UAC), I keep sharpening my skills in cybersecurity and artificial intelligence.

  • Cotonou, Benin
  • Freelance / Remote
  • Next.js · React · Django
WHAT I DO

Services I provide

From interface design to secure deployment, I cover the whole production chain of a web application.

Frontend Development

Creating modern and responsive user interfaces with React, Next.js, and Vue.js for an optimal user experience.

  • React
  • Next.js
  • Vue.js
  • TypeScript
  • Tailwind CSS

Backend Development

Designing robust APIs and high-performance backend systems with Django, Python, and relational databases.

  • Django
  • Python
  • MySQL
  • PostgreSQL
  • REST APIs

Fullstack Web Apps

Developing fullstack web applications with frontend/backend integration and secure deployment.

  • Fullstack
  • HTMX
  • JavaScript
  • Bootstrap

Cybersecurity

Securing web applications, security auditing, and implementing cybersecurity best practices.

  • OWASP
  • Audit
  • Auth / JWT
  • HTTPS

Artificial Intelligence

Integrating AI solutions into web applications, data analysis with Python, and machine learning.

  • Machine Learning
  • Data Analysis
  • Pandas
  • NumPy

DevOps Solutions

Automating deployments, containerization with Docker, infrastructure management, and CI/CD.

  • Docker
  • Git
  • GitLab
  • Apache
  • VMware
  • Linux
MY STACK

Tech stack & tools

The technologies I reach for every day to design, secure and ship.

  • TypeScript
  • React
  • Next.js
  • Vue.js
  • JavaScript
  • Tailwind CSS
  • Bootstrap
  • Node.js
  • Python
  • Django
  • C++
  • C
  • MySQL
  • PostgreSQL
  • Docker
  • Git
  • GitLab
  • Apache
FEATURED WORK

Selected case studies

A selection of projects delivered as a freelancer and in teams, from business CRMs to time-tracking apps.

Purchase Order
Next.js · TypeScript2025

Purchase Order

Purchase order management application with responsive design.

  • Next.js
  • React
  • TypeScript
  • Tailwind
View project — Purchase Order
Bethesda
Next.js · Site vitrine2025

Bethesda

Showcase site for hospital and appointment system.

  • Next.js
  • React
  • Tailwind
View project — Bethesda
MY JOURNEY

Education & experience

Three years of delivered projects, alongside a university degree in computer science.

Professional Experience

  1. Mar 2025 — Jun 2025

    Frontend Developer (Next.js-React)

    Ovaplan (Freelance)

    Collaboration with a team of developers to implement a project management application in the building sector.

  2. Oct 2024 — Mar 2025

    Frontend Developer (Next.js-React)

    KHD (Freelance)

    Development of a mobile clocking application and a management dashboard for the French group KHD.

  3. Feb 2024 — Sep 2024

    Fullstack Developer (Django, HTMX, JavaScript)

    GEFODI (Y-NISSY CONCEPTION)

    Design and development of a training management CRM with AI features.

  4. Jul 2023 — Jan 2024

    Frontend Developer (Next.js-React)

    Explore Benin (Freelance)

    Development and optimization of the user interface of a web platform to promote tourism in Benin.

Education

  1. 2021 — present

    Currently in Master's Degree

    Institute of Training and Research in Computer Science, UAC, Benin

    In-depth training in computer science covering theoretical and practical aspects of software development, databases, and AI.

  2. 2023

    AI Certification Program

    isheeroAfricaTechUpTour (DevOps/DataInfra option)

    Specialized training in artificial intelligence with a focus on DevOps and data infrastructure aspects.

  3. 2021

    AI Summer School

    Intensive training program

    Participation in an intensive program on the latest advances in artificial intelligence and machine learning.

Technical Skills

Languages

  • Python5/5
  • C++5/5
  • JavaScript4/5
  • TypeScript4/5
  • C4/5
  • SQL4/5

Frameworks

  • React5/5
  • Next.js5/5
  • Django5/5
  • Vue.js4/5
  • Node.js4/5
  • Tailwind CSS4/5
  • Bootstrap4/5

DevOps

  • Git5/5
  • GitLab5/5
  • Apache5/5
  • Docker4/5
  • GitHub Actions2/5
DEGREES & CERTIFICATIONS

What backs up my work

Academic training and professional certifications earned along the way.

2023

Docker Certification

OpenClassrooms

Application containerization, images, volumes and service orchestration.

2022

Python Certification

Kaggle

Python fundamentals applied to data analysis and machine learning.

2022

Intensive English Program

Happy Science

Intensive program to work comfortably in English-speaking technical environments.

GET IN TOUCH

Let's build something together

Got a project in mind? Let's talk about it. I usually reply within 24 hours.

ZOUNMEVO Constantin Yélian

Fullstack Developer

Passionate about development, cybersecurity, and artificial intelligence. I am available for freelance projects and collaborations.

Availability: Open for new projects

Reach me directly

No form: send a WhatsApp message or an email, and let's talk.

WhatsAppFastest reply+229 01 90 01 58 15Start the conversationEmailFor detailed enquiriescontantin@valyon.coSend an email

I usually reply within 24 hours.