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Jonh KingJK

Jonh King

Web développeur

400 €/jour
Paris, FR
3-7 ans

Délai de réponse moyen : 1h

À propos de Jonh

I am a highly skilled web developer who has been working specifically in web development for several years. I possess the expertise to take on any of your projects with confidence. My deep knowledge, gained through both my studies and professional experience, spans multiple programming languages and technologies, including Artificial Intelligence (AI), HTML, CSS, Python, JavaScript, MySQL, REST APIs, React, Node.js, and more. Whether you want to build a full-featured SaaS platform, develop a responsive website to showcase your services, create e-commerce solutions, or enhance your online visibility through SEO-friendly design, I am the developer for the job.

In addition to these exceptional skills, I have a high execution speed that allows me to complete projects efficiently within your deadlines, ensuring that you never lose a single second. I am the perfect freelance developer to help you succeed in any project, provide technical guidance, optimize your web applications, and deliver scalable, secure, and maintainable solutions. Do not wait—because you deserve the best, and the best is what I deliver.
  • Français

    Bilingue ou natif

  • Anglais

    Bilingue ou natif

En télétravail uniquement
Travaille majoritairement à distance

Expériences

  • Nuhm
    Web developpeur
    janvier 2023 - octobre 2025 (2 ans et 9 mois)
    Paris, France
    I was in charge of web development at Nuhm AI, from creating SaaS products to developing and maintaining the company's websites. I was excellent and fully committed to my work, especially since I was working there as a freelancer.I had the opportunity to work on the creation of SaaS and AI-powered web applications, as well as on the web design of websites for the company’s online visibility. I was also involved in team collaborations, which strengthened my communication skills and allowed me to work effectively within developer groups. Bug fixing and continuous improvement of existing features. Performance optimization (loading speed, technical SEO) Implementing unit and integration testing Monitoring and resolving hosting or server-related issues.Participating in planning meetings with designers, project managers, and other developers Using Git and GitHub/GitLab for version control Documenting code and processes to facilitate collaboration Assisting or training new developers or interns. Researching and implementing new technologies or frameworks to improve products Creating internal tools to automate repetitive tasks Testing and integrating AI solutions or SaaS features into the website. Developing and maintaining REST or GraphQL APIs Managing and optimizing databases (MySQL, PostgreSQL, MongoDB) Implementing user management and security systems (authentication, roles).Integrating third-party services (payment, email, messaging).
    HTML5 CSS3 JavaScript MySQL Python
  • Fayol
    Web developpeur
    HIGH TECH
    juin 2021 - mai 2023 (1 an et 11 mois)
    Paris, France
    At Fayol Agnency, I served as a web developer responsible for overseeing the development and delivery of diverse web projects. My primary role involved coordinating small teams of developers, ensuring that each member contributed effectively to the project lifecycle. I was actively involved in planning, assigning tasks, and monitoring progress to meet deadlines while maintaining high standards of code quality.


    In addition to team coordination, I personally contributed to both front-end and back-end development, designing responsive and user-friendly interfaces with HTML, CSS, and JavaScript, while also managing server-side functionality using Node.js and database systems such as MySQL and MongoDB. I implemented APIs, integrated third-party services, and ensured robust authentication and security measures.

    My responsibilities extended to project maintenance and optimization, including bug fixes, performance enhancements, and SEO improvements. I established testing protocols, wrote documentation for codebases, and facilitated communication between designers, project managers, and developers to ensure cohesive workflow and project alignment.

    I also took initiative in adopting new technologies and frameworks to improve project efficiency and scalability. By fostering collaboration, mentoring junior developers, and promoting best practices, I ensured that the team delivered high-quality web solutions consistently. My role combined technical expertise, leadership, and problem-solving, allowing Fayol to complete projects on time and exceed client expectations while maintaining a productive and motivated development team.
    JavaScript Python HTML5 CSS3 Intégration web

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Formations

  • Diplôme d’ingénieur en informatique
    Epitas Paris
    2019
    Développement web et logiciel : Maîtrise des langages front-end (HTML, CSS, JavaScript) et back-end (PHP, Python, Java, Node.js). Architecture et design logiciel : Conception d’applications web, APIs, bases de données relationnelles et NoSQL. Cybersécurité et bonnes pratiques : Sécurisation des applications, tests d’intrusion et gestion des vulnérabilités. Gestion de projets IT et travail en équipe : Coordination de projets, méthodes Agile/Scrum, leadership d’équipes de développement. Technologies avancées : Intelligence artificielle, data science, cloud computing et systèmes embarqués . Projets concrets et stages : Plusieurs projets en équipe et stages en entreprise pour mettre en pratique les compétences acquises.

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