Juan Sebastián Valencia G. | Webdesigner et développeur web freelance · Consultant automatisation IA

Explorons le nouveau monde.

Passez au digital et jouez au plus haut niveau.

Un développeur web freelance qui conçoit, construit, référence et automatise votre présence digitale, sans agence entre vous et le travail.

  • Black Wolf K-9
  • Del Cielo a la Tierra
  • Curri & Associates
  • Qué Chingón
  • Appreci
  • Florece

Construit et en service, pas proposé

Quatre systèmes, tous en production

Ce que disent les clients

Dans leurs mots

  • Absolutely phenomenal work. Couldn’t have asked for a better SEO optimizer. Sebastian was on it and accomplished all of the task necessary to bring the website and clients. You will not be disappointed with hiring him.
    Luis EvercrestCEO, Kings Garden Landscaping
  • Juan built our law firm’s website from the ground up. The result is a professional, fast, and SEO-friendly site that finally gives our firm a strong online presence. We highly recommend working with him.
    Samet CurriFounder, Curri Law Firm
  • Juan created a beautiful, multilingual website that truly captures the soul of my work. The automated newsletter and visual design exceeded my expectations. I absolutely recommend him.
    Chloé RivalFounder, Del Cielo a la Tierra
  • We had the pleasure of working with Juan on a recent project through Upwork, and we couldn’t be happier with the results. From the beginning, he demonstrated a deep understanding of WordPress and Elementor, and his ability to follow a brief was exceptional. He took the time to understand the vision thoroughly, asked the right questions, and offered valuable suggestions that elevated the final results far beyond our expectations. His technical skill set is top-notch, he knows the ins and outs of both WordPress and Elementor, and he used them expertly to create a fast, responsive, and beautifully designed website. What really stood out was his attention to detail and communication. Every element we requested was implemented perfectly, and even when we asked for revisions, he handled them quickly and professionally. He delivered the project on time, within budget, and with a level of polish that speaks volumes about his professionalism and passion for quality work. If you’re looking for a talented, reliable, and knowledgeable web developer who can bring your ideas to life using WordPress and Elementor, we highly recommend Juan!
    Doria DigitalAgency, Doria Digital
  • Juan built our e-commerce site from the ground up with stunning visuals and seamless user experience. He also optimized our SEO so we’re now attracting organic traffic and serious buyers. I highly recommend working with him.
    Javier LópezCEO, Importrailer Colombia
  • Working with Juan Sebastián has been an excellent experience. He is highly professional, detail-oriented, and always proactive in making sure nothing is missed. He took the time to understand the goals of the project and delivered a website that is not only visually attractive, but also fast, SEO-ready, and optimized for both desktop and mobile. What stood out the most was his communication and organization, he provided clear checklists, asked the right questions, and integrated all feedback quickly. He also went above and beyond by suggesting improvements that added real value to the final result. I would highly recommend Juan Sebastián to anyone needing a reliable and talented WordPress/Hostinger web designer. I look forward to working with him again on future projects.
    Terry SteeleFounder, Qué Chingón Costa Rica
  • Excellent freelancer and intelligent SEO specialist. Would highly suggest working with him on any of your projects!! Top notch marketer.
    Blake MitchellCEO, SEO agency
  • Working with Juan on the development of Maloik & Co was an amazing experience. From the brand concept to the branding and web design, Juan brought a clear vision, professionalism, and an exceptional attention to detail that truly made a difference. It was a very collaborative process where we built a strong and powerful visual identity together. His attitude was always positive, proactive, and fully committed. I highly recommend him.
    Andrés VillegasCreative Director, Maloik & Co.
  • We had the pleasure of working with Juan on a series of graphical assets for a recent project, and the results were nothing short of exceptional. From the very beginning, he gathered the necessary information and understood our vision. His graphic design skills, attention to detail and professionalism are commendable. We are very pleased and highly recommend him!
    Juliana SaavedraFounder & CEO, Appreci Ltd
  • I have worked with Juan Sebastian on several projects since 2012 and he has always delivered excellent results. He is an outstanding graphic designer with great ideas and a very hard worker.
    Juan PieschaconPhD in Computer Science
  • Juan produced the commercial brochure for one of my new photography identities. Creative, responsive and attentive, I was delighted with his work, and all at a reasonable price. I recommend him for logo and design work or social media animation.
    Arnaud CaillouCorporate Photographer, L’Œil du Diaph

Absolutely phenomenal work. Couldn’t have asked for a better SEO optimizer. Sebastian was on it and accomplished all of the task necessary to bring the website and clients. You will not be disappointed with hiring him.

Luis EvercrestCEO, Kings Garden Landscaping

Juan built our law firm’s website from the ground up. The result is a professional, fast, and SEO-friendly site that finally gives our firm a strong online presence. We highly recommend working with him.

Samet CurriFounder, Curri Law Firm

Juan created a beautiful, multilingual website that truly captures the soul of my work. The automated newsletter and visual design exceeded my expectations. I absolutely recommend him.

Chloé RivalFounder, Del Cielo a la Tierra

We had the pleasure of working with Juan on a recent project through Upwork, and we couldn’t be happier with the results. From the beginning, he demonstrated a deep understanding of WordPress and Elementor, and his ability to follow a brief was exceptional.

He took the time to understand the vision thoroughly, asked the right questions, and offered valuable suggestions that elevated the final results far beyond our expectations. His technical skill set is top-notch, he knows the ins and outs of both WordPress and Elementor, and he used them expertly to create a fast, responsive, and beautifully designed website.

What really stood out was his attention to detail and communication. Every element we requested was implemented perfectly, and even when we asked for revisions, he handled them quickly and professionally. He delivered the project on time, within budget, and with a level of polish that speaks volumes about his professionalism and passion for quality work.

If you’re looking for a talented, reliable, and knowledgeable web developer who can bring your ideas to life using WordPress and Elementor, we highly recommend Juan!

Doria DigitalAgency, Doria Digital

Juan built our e-commerce site from the ground up with stunning visuals and seamless user experience. He also optimized our SEO so we’re now attracting organic traffic and serious buyers. I highly recommend working with him.

Javier LópezCEO, Importrailer Colombia

Working with Juan Sebastián has been an excellent experience. He is highly professional, detail-oriented, and always proactive in making sure nothing is missed. He took the time to understand the goals of the project and delivered a website that is not only visually attractive, but also fast, SEO-ready, and optimized for both desktop and mobile.

What stood out the most was his communication and organization, he provided clear checklists, asked the right questions, and integrated all feedback quickly. He also went above and beyond by suggesting improvements that added real value to the final result.

I would highly recommend Juan Sebastián to anyone needing a reliable and talented WordPress/Hostinger web designer. I look forward to working with him again on future projects.

Terry SteeleFounder, Qué Chingón Costa RicaMexican restaurant in Costa Rica

Working with Juan on the development of Maloik & Co was an amazing experience. From the brand concept to the branding and web design, Juan brought a clear vision, professionalism, and an exceptional attention to detail that truly made a difference. It was a very collaborative process where we built a strong and powerful visual identity together. His attitude was always positive, proactive, and fully committed. I highly recommend him.

Andrés VillegasCreative Director, Maloik & Co.

We had the pleasure of working with Juan on a series of graphical assets for a recent project, and the results were nothing short of exceptional. From the very beginning, he gathered the necessary information and understood our vision. His graphic design skills, attention to detail and professionalism are commendable. We are very pleased and highly recommend him!

Juliana SaavedraFounder & CEO, Appreci Ltd

I have worked with Juan Sebastian on several projects since 2012 and he has always delivered excellent results. He is an outstanding graphic designer with great ideas and a very hard worker.

Juan PieschaconPhD in Computer Science

Juan produced the commercial brochure for one of my new photography identities. Creative, responsive and attentive, I was delighted with his work, and all at a reasonable price. I recommend him for logo and design work or social media animation.

Arnaud CaillouCorporate Photographer, L’Œil du DiaphTranslated from French

À qui ça s'adresse

Si vous reconnaissez votre situation, continuez

Le dirigeant aux projets inachevés

Vous savez exactement ce que vous voulez construire.

Vous avez connu des prestataires qui ont cessé de répondre, raté les délais ou disparu avec la connaissance de votre métier.

Le problème n'est pas vos idées : c'est de trouver quelqu'un qui finit.

L'entreprise établie, hors ligne

Votre activité tourne, avec de vrais clients et un chiffre d'affaires régulier.

Votre marché passe en ligne vite, et vous n'avez ni le temps ni l'envie de gérer la complexité technique.

Le problème n'est pas la croissance : c'est l'absence d'un partenaire digital dédié.

L'objectif commun

Les deux situations demandent la même réponse : un seul partenaire responsable, qui prend en charge toute l'opération digitale et ne disparaît pas.

Cœur de métier
Ingénierie web, automatisation des flux, GEO et SEO
Idéal pour
Boutiques Shopify, marques e-commerce et opérations B2B
Modèle
Partenaire boutique, exécution agile et dédiée
Juan Sebastián Valencia G.

À propos

Une équipe digitale d'une seule personne : Juan Sebastián Valencia G.

Derrière JSV-88 il y a un développeur web freelance et un seul : seize ans de design, d'e-commerce et de SEO, opérés aujourd'hui avec des agents IA qui exécutent pendant que la décision reste humaine.

Le principe est simple. Le développeur assisté par IA décide l'architecture et dirige les agents qui produisent le code, les contenus et les flux. Vous parlez à la personne qui construit, et cette personne n'a que trois à cinq clients à la fois.

Basé à Rennes, sur place à Nantes. Pour le référencement local, deux pages dédiées : consultant SEO à Rennes et consultant SEO à Nantes. Pour le parcours et la méthode : la personne derrière JSV-88.

Comment une seule personne couvre tout cela

Questions

Les questions qu'on pose avant de confier son site

Quatre réponses, chacune assez courte pour se lire debout.

Webmaster freelance ou agence : quelle différence pour une PME ?

Un webmaster freelance construit et maintient lui-même ce qu'il vend ; une agence répartit le travail entre plusieurs personnes. Pour une PME, la différence se voit dans le nombre d'interlocuteurs et dans le prix : un seul opérateur, sans couche de coordination à financer.

Combien coûte un webmaster freelance ?

Le tarif webmaster freelance chez JSV-88 est un forfait mensuel unique, à partir de 2 500 EUR, quel que soit le mélange de site, SEO et automatisation. Le périmètre s'adapte à l'entreprise, pas l'inverse. Une mission ponctuelle se chiffre sur devis.

Que se passe-t-il si le webmaster n'est plus disponible ?

Chaque projet est construit pour que l'entreprise possède tout : comptes, code, documentation. Un webmaster entreprise externe peut reprendre le site demain sans rien redemander. C'est une condition de départ, pas une option.

Faut-il être à Rennes ou à Nantes pour travailler ensemble ?

Non. JSV-88 est basé à Rennes et se déplace à Nantes ; les quatre systèmes en production ont été construits à distance, pour des clients en France et à l'étranger. Le travail se fait en français, en anglais ou en espagnol.

Envoyer un message

Décrivez ce qui vous coûte du temps ou de l'argent

Une situation précise vaut mieux qu'un projet vague : « trois personnes ressaisissent les commandes le lundi » produit un périmètre, « il faut améliorer le site » produit une réponse générique.

Besoin de donner plus de détail ? Utilisez le formulaire complet.

Ce qui casse aujourd'hui, et ce que ça vous coûte.

Commencez par le problème que vous avez déjà

La personne qui lit le message est celle qui construirait la solution. Décrire votre situation, ou, si le projet est déjà cadré, demander un devis site internet.

Décrire votre situation

JSV-88 - Juan Sebastián Valencia G.

Zone
Rennes et Rennes Métropole Rennes, Cesson-Sévigné, Saint-Grégoire, Bruz, Chantepie, Saint-Jacques-de-la-Lande, Pacé, Betton, Vern-sur-Seiche, Chartres-de-Bretagne
Téléphone
+33 7 80 88 42 37 AppelerEnvoyer un SMSWhatsApp
Horaires
Du lundi au vendredi, 9 h à 18 h