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Seydou OuattaraSO

Seydou Ouattara

Senior Front-end Developer (React / Angular)

€520/day
Nantes, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Seydou

Senior Front-end Developer specializing in React and Angular, I support SMEs, startups, and product teams in the development and evolution of reliable and maintainable web applications.

I work independently and/or as a team reinforcement on turnkey front-end projects, with a strong ability to quickly understand business needs and deliver effective solutions without over-engineering.

Beyond front-end, I am also capable of handling complete web applications, in collaboration with the back-end (or independently on simple architectures), from screen design to production.

Accustomed to demanding technical contexts (business applications, real-time, modernization of existing systems), I work autonomously within agile teams, with a constant focus on code quality, clarity, and durability.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Nantes (up to 50km)

Experience

  • Asys
    Fullstack Web Developer – Asys
    SOFTWARE PUBLISHING
    November 2013 - August 2021 (7 years and 9 months)
    Nantes, France
    Intervention on Chronos and Chronos Mobile, a business application for time and activity management used by companies for tracking and planning.

    Participation in the development and maintenance of the application over several years, with a central role on the front-end. I notably contributed to the porting of the desktop version (Silverlight) to a modern web application in Angular, from the early versions (Angular 2+) to more recent versions (12+).

    On the back-end side, I worked in interaction with the teams (Progress, then Java), mainly for integration, understanding business flows, and ensuring front-end/back-end consistency. I also developed data extraction interfaces for specific requests.

    Agile methodology work, in a complex business product context, with strong challenges regarding reliability, ergonomics, and performance.

    Technologies: Angular, TypeScript, JavaScript, jQuery, Progress, Git, Jenkins, AWS, Agile methods
    Angular Typescript Front-End Development SCRUM Agile Methodology Practice Java
  • Asys
    Scrum Master
    SOFTWARE PUBLISHING
    September 2017 - August 2021 (3 years and 11 months)
    Nantes, France
    Coaching a product team as a Scrum Master, with a key role in implementing and facilitating the Scrum methodology.

    Training collaborators in agile practices, planning and facilitating rituals (sprint planning, daily, review, retrospective) and preparing sprint review demos.

    Liaison between technical teams and clients, working on prioritizing needs, functional clarification, and preparing test environments for new releases.

    This experience allowed me to strengthen my product understanding, team/client communication, and collective efficiency.
    SCRUM Agile Methodology Practice SAFe Scrum Master Facilitation
  • Younup
    Web Development Consultant
    TECH
    September 2021 - January 2023 (1 year and 4 months)
    Nantes, France
    Web developer consultant mission for a client specializing in geoseismic data acquisition and offshore resource exploration.

    Development of a web application for piloting and supervising aquatic drones, used in a constrained operational context (offshore, 24/7).

    Work on real-time issues: simultaneous localization, control, and supervision of up to 400 drones, with a strong emphasis on reliability and performance.

    Primarily front-end role, integrating real-time feeds (WebSocket / HTTP), close collaboration with the back-end (Java 17), and participation in setting up a design system based on Bootstrap.

    End-to-end testing with Cypress and contribution to the overall quality of a critical production product.

    Technologies:
    Angular 14+, TypeScript, Cypress 13+, WebSocket, HTTP, Java 17, PostgreSQL, Bootstrap
    Angular Typescript Java Web Socket Design System

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Education

  • Software Developer
    ENI Nantes
    2012

Skill set

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