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Hello! My name is Jonathan Barquero.

With 19+ years in software development—including 13+ years specializing in Ruby on Rails—I’ve designed and delivered high-performance, scalable systems for diverse industries. My expertise spans:


Backend & Cloud:


Full-stack development with Rails, Node.js, and microservices (RESTful APIs, AWS, Heroku)


Asynchronous workflows (Sidekiq, AWS SQS, Cron) and auth systems (Auth0, JWT)


Database optimization (PostgreSQL, MongoDB, Redis) for performance tuning and bottleneck resolution


Frontend & Mobile:


Modern frameworks: ReactJS, Svelte, Angular


Hybrid/native mobile: Flutter, React Native, Swift, Android

A little bit of my story

For 19+ years, I’ve thrived at the intersection of creativity and technology, building software that solves real-world problems. My journey began with a passion for clean, efficient code—and evolved into deep expertise in Ruby on Rails, JavaScript frameworks (React, Svelte), and cloud-native systems. Along the way, I’ve architected scalable applications, mentored teams, and optimized databases to handle millions of transactions.


What excites me most is tackling complexity. Whether designing RESTful APIs, implementing async workflows with Sidekiq/AWS SQS, or bridging frontend and mobile ecosystems (Flutter, React Native), I love turning challenges into seamless user experiences. My work has been recognized by NASA and the WHO (thanks to hackathon wins!), and I’ve contributed to the developer community as a top 5% StackOverflow contributor.


Today, I’m still driven by curiosity—exploring new tools, refining performance bottlenecks, and collaborating with teams to build things that matter. Let’s create something great together.

Skills and interests

EDUCATION

  • UNED - Estudios Generales
  • Universidad Latina de Costa Rica - Bachillerato Ingieneria en Computacion
  • ULACIT - Licenciatura Ingieneria en Computacion con enfasis en desarrollo de software

RECONOCIMIENTOS

  • Ganador 1er Lugar Hackathon Costa Rica - Behealthy
  • Ganador 3er Lugar Hackathon NASA Australia
  • Miembro de StackOverflow con mas de 8K de reputacion

My experience so far

SKILLS

  • Backend: Ruby on Rails, NodeJS
  • Frontend: Ruby, ReactJS, AngularJS
  • Mobile: native (swift, objective-c, android) & hybrid (cordova, react native, flutter)

LANGUAGES

  • Ruby
  • Typescript
  • Javascript

How can I help

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Outsourcing

Have an idea that you want to make reality? or do you already have a software? i can help providing information you dont have or dont understand

Development

Name the stack you are looking for and we will make it happen!, if you dont know what you are looking for we will land any ideas you have and will develop and ship it to you using the best methodologies

BlockChain

If you need help with anything related to this industry we are help to help and advise you in the metaverse!

Interested in working together with me? 
Feel free to contact me!

It will be my pleasure to assist you with any request you might have dont hesitate and let me know!