Search for a freelancer Post a project
Malt welcom

Welcome to Javier's freelance profile!

Malt gives you access to the best freelancers for your projects. Contact Javier to discuss your project or search for other freelancer profiles on Malt.

Javier Lopez Jimeno

Desarrollador React y Node

Works remotely from Madrid

  • 40.4167
  • -3.7036
  • Suggested rate €250 / day
  • Experience 2-7 years
  • Response rate 100%
  • Response time A few days
Propose a project The project will begin once you accept Javier's quote.

This freelancer is available part-time (Evenings & weekends) but hasn't confirmed their availability in over 7 days.

Part-time, Evenings & weekends

Propose a project The project will begin once you accept Javier's quote.

Location and workplace preferences

Location
Madrid, España
Remote only
Primarily works remotely

Preferences

Project length
  • ≤ 1 week
  • ≤ 1 month
  • Between 1-3 months
  • Between 3-6 months
  • ≥ 6 months
Company size
  • 1 person
  • 2-10 people
  • 11 - 49 people
  • 50 - 249 people
  • 250 - 999 people
+2 autres

Verifications

Freelancer code of conduct signed
Read the Malt code of conduct

Verified email

Languages

  • English

    Fluent

  • Spanish

    Native or bilingual

Categories

Skills (18)

  • Frameworks
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced
  • Languages
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced
  • CSS
    Beginner Intermediate Advanced

Javier in a few words

I’m a Telecommunications Engineer with more than
5 years of web development experience. From
building digital products for startups to developing
software for banks. I also have a sense for en-
trepreneurship, and I’m very interested in solving and
learning new ways to solve complex problems with
technology. For that reason I am always involved in
building digital businesses as side projects.

Portfolio

Experience

The Telecom Boutique

Telecommunications

Back-end team leader

Las Rozas de Madrid, España

June 2020 - Today (2 years and 3 months)

TTB is a telecommunications network operator that belongs to Dominion Group
The Telecom Boutique
• Developing serverless technologies and microservices with AWS Lambda and API Gateway.
• Building the back end with NodeJs, DynamoDB, SQS, CloudSearch, S3, CloudFormation, SNS or SES.
• Helping data team to design solutions with Athena and Quicksight.
• Leading a developer’s team with Agile methodologies using Jira and Confluence.

Delupadel

Sports

Co-founder and full stack developer

Madrid, España

September 2019 - Today (3 years)

Delupadel is a mobile app that uses Big Data, Machine Learning and Gamification techniques to improve the
financial performance of Padel Clubs by a fun and addictive competition format for amateur padel players
• Building the web and app with React and React Native to allow players manage their matches.
• Developing the back end with NodeJs, Express and Graphql. Deploying it in AWS
• Designing a data model for a non-relational database. Deploying it in Firebase.
• Building a back office interface in React to allow the operations team to manage leagues autonomously.
• Designing algorithms with Big Data and Machine Learning techniques to automatizate calendar orga-
nization. Automating communications through Whatsapp and Slack.
• Setting up an analytics system to track relevant product and business metrics.

UPM-GING

Education & E-learning

Full stack developer

Madrid, España

September 2019 - June 2020 (9 months)

Participated in European research project Fiware. Contributed to develop educational innovation project Edi-
phy.
• Participated in European research project Fiware developing Big Data algorihtms to use in smart cities.
• Contributed to develop educational innovation project Ediphy with React.

Bonofit

Sports

Front-end web developer

Madrid, España

September 2018 - September 2018

Bonofit is a subscription service that lets users find and book fitness classes in the best fitness studios. Acquired
by Urban Sports Club.
• Created web using React, React Native, Redux and Saga.
• Worked effectively with Scrum and Agile methodologies.

Neboola

E-commerce

Front-end web developer

Madrid, España

September 2018 - December 2018 (3 months)

Neboola aims to revolutionize the consumer health and personal care industry by creating a portfolio of D2C
brands for the digital native consumer. We built the following products: Loopas and Vitoo.
• Created site layout and user interface using HTML and CSS practices.
• Built a subscription e-commerce with Shopify.

Redsys

Banking & Insurance

Full stack developer

Madrid, España

February 2019 - June 2019 (4 months)

Redsys is a company that offers its services to financial entities, these being the ones that formalize the con-
tracts with the merchants and which, consequently, are in charge of all aspects related to their management.
• Used various technologies, including Java or Javascript for refactoring code and optimizing corporate
websites.
• Created site layout and user interface using JSP and CSS practices.
• Used programming capabilities in Spring, SQL and other libraries as needed.

Education