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Sebastien L.SL

Sebastien L.

Web Developer - Front-end

€160/day
Barcelona, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sebastien

es.

I have more than 5 years of experience in the digital world, I started in 2018 developing my first web projects and since then I have worked in different areas of development, from Front-End and Back-end with experience in JavaScript, Vue.js, React.js, Vite and Tailwind CSS. On the Back-end side, Java, SpringBoot, MySQL, Firebase… I have worked in the development of accessible (WCAG 3) and optimized interfaces, as well as in the automation of processes with Zoho CRM and I know some CMS like WordPress and Duda.
I have knowledge in Web3, Solidity and Foundry, developing smart contracts and decentralized applications. Additionally, I have experience in SaaS, SEO and digital marketing.
I am proactive and self-taught, with a focus on user experience (UX/UI) and performance optimization. I am motivated by innovation and teamwork to create efficient and scalable solutions.

fr.
I have more than 5 years of experience in the digital world. I started in 2018 by developing my first web projects and, since then, I have worked in different areas of development, both in Front-End and Back-End. I have experience in JavaScript, Vue.js, React.js, Vite and Tailwind CSS for the Front-End, and in Java, SpringBoot, MySQL, Firebase for the Back-End.

I have also worked on the development of accessible (WCAG 3) and optimized interfaces, as well as on the automation of processes with Zoho CRM. I also know some CMS like WordPress and Duda.

I have knowledge in Web3, Solidity and Foundry, and I have developed smart contracts as well as decentralized applications. Furthermore, I have experience in SaaS, SEO and digital marketing.

I am proactive and self-taught, with a strong focus on user experience (UX/UI) and performance optimization. I am motivated by innovation and teamwork to create efficient and scalable solutions.
  • Spanish

    Native or bilingual

  • French

    Native or bilingual

  • English

    Conversational

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

Experience

  • Frerlance
    Full-Stack Developer (Training and personal projects)
    January 2024 - December 2024 (11 months)
    Hospitalet de Llobregat, Spain
    Development of mini-applications and websites with JavaScript, Vue.js, React.js, Vite and Tailwind CSS. Advanced learning in design, Front-End project structuring and performance optimization. Development of Smart Contracts in Web3, specializing in Solidity and Foundry for the creation of smart contracts.
  • 7EXPERTS,
    Front-End Developer and Web Designer
    November 2020 - January 2024 (3 years and 2 months)
    Barcelona, Spain
    Creation and renovation of the corporate website with Duda CRM, Zoho Marketing, Google Ads, Semrush and HubSpot. Development of calculation modules in JavaScript, CSS and HTML for the Fiscal and Supply Chain areas. Automation of processes with Zoho CRM, Deluge and WorkFlow to improve team efficiency. Production of graphic and audiovisual content for marketing with Canva, Adobe XD and DaVinci Resolve. Technical support and webinar programming.
  • TRINOV,
    Full-Stack Developer
    June 2018 - September 2019 (1 year and 3 months)
    Paris, France
    Development of SaaS applications with Ext.js, ES6, Java, SpringBoot and MySQL. Optimization of relational databases and improvement of system performance. Refactoring and versioning to improve the speed and security of existing applications. Participation in the entire software development cycle: specifications, layout, activity diagrams, and production. Work under Agile methodology.

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Education

  • Certificación Web3 – BlockCoder,
    2024
    Certificación Web3 – BlockCoder,
  • Master 1 – Desarrollo Web
    3W Academy,
    2020
    Master 1 – Desarrollo Web

Skill set

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