Esteban (steven) De Salas

desarrollo fullstack javascript

Moves to Madrid

  • 40.4167
  • -3.7036
  • Indicative rate €450 / day
  • Experience 7+ years
  • Response rate 100%
  • Response time 1h
Propose a project The project will only begin when you accept Esteban (steven)'s quote.

Confirmed availability

Part time, 3 days a week

Propose a project The project will only begin when you accept Esteban (steven)'s quote.

Location and geographical scope

Madrid, España
Can work in your office at
  • Madrid and 50km around


Project length
≤ 1 month


  • Verified email


  • Inglés

    Native or bilingual

  • Español

    Native or bilingual

Skills (36)

Esteban (steven) in a few words

A Esteban le encanta crear interfaces con JavaScript y procesos automatizados que hacen las tareas del día a día mas simples y agradables. También trae mucha experiencia en creación de APIs con baja latencia en NodeJS y bases de datos SQL y NoSQL, ademas de experiencia práctica creando despliegues automáticos a la nube y pruebas unitarias automatizadas.

★ Programando desde los 8 años
★ 1000 estrellas en Github
★ Top 2 % de StackOverflow
★ Personalidad abierta y relajada, comunicación excellente.
★ Sabe formar a otros.
★ Le encantan los Hackathons y competiciones de programación
★ Contribuye a la comunidad con software libre, charlas y articulos.

» NodeJS Microservices / APIs
» GIT, Docker, AWS DevOps, Bash
» Cross platform web apps. IoT interfaces.
» Hybrid IOS / Android Apps on Cordova
» Responsive UX Design & Interfaces
» LESS, Bootstrap, Pure
» jQuery, Ext JS, React, Angular, Knockout, Vue.js
» C#, .NET 3.5 and 4.0
» MSSQL, MySQL Databases
» Agile, Unit Testing, Jasmine, TDD
» CI, Build Automation, Ant, PhantomJS
» API Design, JSON, OAuth, REST

Areas de Projectos:
» IoT
» Mapas y GIS
» Billetes Móviles y Códigos de Barras
» Gestión de Emergencias
» Fuentes de Datos de activos Financieros.
» Portafolios de Inversión
» POS (Puntos de Venta)
» Optimización de Recursos y Rendimiento



LetMePark SLU

Internet of Things

Lead Developer (Full-Stack JavaScript, APIs, Node.js, AWS, DevOps)

Madrid, España

October 2019 - Today

Building smart cities by connecting vehicles with their environment.

Steven had a pivotal role designing and building the core platform infrastructure for this startup in the urban mobility space. Maximizing IT resource use and speed-to-market with low-cost, stable, high-performance infrastructure.

Google Cloud, Amazon Web Services, Build Automation, JavaScript, Node.js, API Development, MongoDB, DevOps, Docker, ECS, Gitlab, Security/Cryptography, Bash/Unix scripting, MQTT, Nginx, PCI Payment Processing, Automated Assistants, Third-party integration, Voice Assistants, Alexa, Vue.js, Junior Peer Code-Reviews and Mentoring.

Wild Code School

Education & E-learning

Full-Stack Trainer (React, Node.js, ES6, Express, TDD, Bash)

Madrid, España

March 2019 - Today

Teaching 5-month intensive programming courses to the industry's future talent.

Latitude Financial Services

Banking & Insurance

Node.js Developer (APIs, Payments, Amazon Web Services, DevOps, Express, Node.js, ES6)

Melbourne, Australia

July 2017 - May 2018

Building a cloud-deployed payments system using Microservice APIs, Lambdas, Node.js (ES2017), Jest, Jasmine, Async/Await, Swagger/OpenAPI, Docker, Containerized/Scalable Applications, Terraform, Gitlab, CI/CD Pipelines, Bash, DevOps, AWS, Dynamo, SQS, SNS, ECS, Event-based architectures (Pub/Sub), CQRS, Distributed Systems, Batch Processing, PGP Encryption, Performance Optimisation, Streams, Back-Pressure, Concurrency, Self-Healing Transactions.


High Tech

Senior JavaScript Developer (Node, Angular, Knockout, C#, SQL/NoSQL, AWS DevOps)

Melbourne, Australia

April 2016 - March 2019

Full Stack JavaScript contract role working on SEEK User Interfaces and AWS hosted API’s.

Steven joined the 'Role Requirements' team to help deliver great candidate matching. Millions of job applications are now getting scored and ranked for role suitability every year, resulting in significant time savings to users of the SEEK platform.

Working in a Continuosly Deployed, Agile environment with Node.Js, Angular, Knockout, Jasmine, Karma, Gulp, TeamCity, LESS, Microservices / APIs, PACT, Swagger, Golang, DynamoDB, C#, SQL Server, Docker, Serverless, SNS/SQS, Lambdas, AWS DevOps.



Mobile Application Developer (HTML5, CSS3, OO JavaScript)

City de Londres, Reino Unido

February 2012 - August 2012

Cross-Platform Mobile Application Developer (Android, iOS, BlackBerry, WebOS, Windows) building a bespoke HTML5 mobile app front end for a specialist mTicketing company based near London Bridge.

I was the lead Front-End developer and responsible for:

1) Assessment and implementation of appropriate technology stacks for Client UI (OO JavaScript, JSON, HTML5, CSS3, jQuery Mobile, MustacheJS, LessCSS, Phonegap),
2) Setting up automated testing and Test-Driven Development (qUnit, Karma),
3) Setting up automations for Build / Cloud Deployment (Ant, Google Closure Tools, jsDoc).
4) Building the prototype for Client UI to tailored requirements using the above technology,
5) Mentoring junior developers through pair-programming to take over the project after development processes have been established

The MBTA mTicket application was launched in the Android and iPhone app markets in November 2012, and was a complete success grossing $1million of sold tickets in Boston in the first ten weeks of operation. The core app was subsequently rebranded to work in London, Athens, Los Angeles, New York and New Orleans.

Daniel Seguido - Segresco


Esteban realizó mi página web Hizo un gran trabajo aportando su conocimiento y creatividad. Una suerte haber contactado con este profesional y muy contento con el resultado!!



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