David Valín, Development
+31 0624662151 Amsterdam (Netherlands)

Frontend development

I create the face of web products with latest technologies

Some keywords: Web Components, Polymer (lit-element), React, Redux, Angular, Webpack, Riot, Typescript, Javascript, HTML5, CSS3, Jest, Jasmine... and hundreds of libraries

Backend development

Model design, APIs building, API documentation

Some keywords: Javascript, Typescript, Node.js, Ruby, Rails, Grape, Erlang, OTP, Cowboy... and hundreds of libraries

About David Valín

I'm a serial autodidact in everything related to internet technology. I started learning in 1996 when internet just arrived to Spain. In the last years, I have worked in multiple projects for big, medium and small corporations, as well as for particulars, in different roles, fact that has converted me into an experienced developer that touched almost all the areas of web development.

With my 9 years of professional experience I am today living in the Netherlands providing solid software development services for my clients.

businesses, IT, software architecture, frontend development, UI, User Interface, backend development, SEO, software scalability, UI design, user flow design, api design, productivity, database design, model design, unit testing, end to end testing, project management, long-scalable software solutions, digital security, motivation, influence, team building, it software outsourcing
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I have worked in the offices of

MisterGreen Direct, ABN AMRO, ING, VakantieVeilingen, Tata Consulting Services, Rabobank, KLM, Yieldr, Maker Street, Tele2, Guidion, Zamro

How I work


I make it

  • centralized
  • object oriented
  • documented
  • reusable
  • testable
  • predictable
  • scalable
  • profitable

Featured Projects

Real Time Bidding platform

I entirely rebuilt from scratch together with a designer
the entire frontend of a Real Time Bidding (RTB) platform
at Yieldr. This was enterprise level.

Car Leasing Platform

(Angular 6, Node.js, GraphQL) Fully implemented internationalization (i18n) for 2 countries, 3 languages. Designed and implemented SEO strategy that ranked the company very high in Google in almost no time. Implemented backend rendering using Angular Universal. Implemented several features like car filtering or automated  dynamic car  images generation and more...

svg world map navigator

I entirely implemented the v1.0 application from a design and UX specification
using Angular.js framework and Kartograph.js library for Techtribe

Learning Academy

One of my academies. I designed this. I am a trainer there. I implemented it with OptimizePress, custom marketing strategies and SEO strategy.


I entirely created this. Business model design. Prototype. Design, frontend and backend implementations with lots of unit tests. A big development project that includes a content licensing system, review system, content processing system, invoicing system, royalties system, affiliate system and much, much more...

Travel Inspiration Finder

I participated during 4 months in this platform, implementing features, fixing bugs,
making improvements and consultancy for Next-Link working at KLM building in Amsterdam Schiphol Rijk


I joined them to implement web ui components using vanilla javascript and typescript. I helped them to improve Angular code. Also fix a lot of bugs




I entirely created this. Business model design. Prototype. Design, Frontend and Backend implementations. It's a online courses e-commerce application that includes digital products shop, landing pages system, email integration and an affiliate system.


Max van den Ingh

We had a though project at MisterGreen: internationalisation. David helped us with a scalable solution which works really good. I highly recommend David, being a kind and skilled tech person, he knows what he is doing, does his research really well and works fast. There was some time left when he finished the internationalisation project which he used to build a technical SEO solution that helps us rank high fast in Google organic search. Thanks for your work!

Max van den Ingh, MisterGreen Direct

I had the pleasure of working with David Valin at Rabobank, collaborating on a very special project.

I was impressed with David’s ability to focus until work is done, He is great in dealing with difficult situations and a fantastic problem solver.

David would be a true asset for any positions requiring Front-end skills and comes with my heartfelt recommendation.

Mark Dronkers - Customer Lead

David created the entire MVP frontend of an application build for intra-group charging with a strong emphasize on billing and accounting. With backend running on DLT. His business sense and creativity helped us build a good marketing video. David functions best if he has a thorough understanding of the target solution and the end-2-end process.

Mark Dronkers - Customer Lead, ING Bank

David is a hard-working smart developer cum architect cum consultant for the Front End technologies. He can help the big corporates achieve speed and scalability of a startup with his skills and knowledge of end-to-end web application engineering

Niels Baarsma - CTO - Co-Founder

David is a very creative and proactive developer who’s contagious enthusiasm helped bring our application to a new level.

Niels Baarsma - CTO - Co-Founder Yieldr

David and I worked together for more then 1 year. His contagious enthusiasm and good mood are a very nice addition to any development team,
that in combination with his commitment to full-fill a small task or very big assignment make him a very productive developer. Given the opportunity
I would definitely would like to work with David again.

Joris Spermon - VP Development
Carlos Cesteros

David Valín works with the most advanced technical knowledge and the seriousness of formality of a law firm. I would define him as a professional capable and auto-exigent which you like working with.

Carlos Cesteros Lonver

Sobriety and professionalism in addressing the projects, and resolution for developing the entrusted facet.

Alejando Losada, Festival Ho!

Each time we make a project with David, is an enriching experience. It has never been limited to give a timely solution to the problem is posed, but it makes its point of view and their knowledge and experience to improve or make better use the project that is being addressed.
A professional like few in this highly competitive area.

Carlos Portomeñe
A-Porta Innovaciones S.L.

Book me as Developer

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Available in the cities of Almere, Lelystad, Hilversum, Bussum, Naarden, Zwoolle, Amersfoort, Utrecht, Amsterdam in the Netherlands or Remote Worldwide