About us
We're Javier and Jennifer
A married couple from Valladolid running 13 Solutions. When you hire us, you always talk to the people who build your project.
Made inValladolid
Behind every project, two names
We're Javier Polanco and Jennifer Sánchez. Javier handles development: websites, apps, plugins and integrations. Jennifer runs the business and ecommerce side, so what we build sells and is easy to manage.
We work directly with every client, with no accounts passed from hand to hand. We know every project because we built it ourselves, and we keep standing behind it after delivery.
We work with startups, SMEs, agencies and designers who need a technical team they can trust. Sometimes we're their development department; other times, the piece that connects their tools.
If you can imagine it, we can code it.
The team
The people
you'll be talking to
- JP
Javier Polanco
Senior Developer
Writes the code, designs the integrations and makes sure every website is fast, secure and easy to maintain.
- JS
Jennifer Sánchez
Ecommerce Manager
Turns business goals into features and makes sure what we build sells and is easy to manage.
Strategy and executionCode that works
- Plugins built30
- Lines of code written+250.000
- AI and API integrations50
- Automations deployed120
How we work
What you can expect from us
- 01
You talk to the people who build it
No middlemen: we explain technical decisions ourselves, clearly and without jargon.
- 02
Everything clear before we start
Scope, price and timelines agreed in writing. If anything changes, we discuss it first.
- 03
Code that lasts
Clean, documented and secure, so your project can grow without being rebuilt.
Reviews
We build so others can shine
Agencies, designers and companies that trust us as their technical team.
“Working with 13 Solutions has been a turning point. As a freelance designer, I needed someone who could turn my ideas into clean, fast builds with no surprises. They're always available, they understand the language of design and turn it into real code that works.”
“13 Solutions is our technical extension. We design, they build. Their work has let us grow without expanding our in-house team. We recommend them without hesitation.”
“Our agency needed a partner who could handle web and app development without slowing down our delivery. With 13 Solutions we found exactly that: efficiency, clear communication and flawless delivery.”
Available for new projects
Got a project in mind?
Tell us about it and we'll reply with a no-obligation proposal. If you can imagine it, we can code it.
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