Cristian S.

Software Engineer

I’m a fullstack developer with 8+ years of experience, passionate about building scalable web applications.

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About Me

My introduction
CN Tower, Toronto

Experience

8+ Years

Completed

3+ Projects

Available

Ready to talk

Fullstack Developer based on Kitchener. Skilled in Node.js, PHP, WordPress, AWS, and leading projects.

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Skills

My expertise

Frontend/UI

HTML

Advanced

CSS

Advanced

Typescript

Advanced

Tailwind

Intermediate

Git

Advanced

React

Intermediate

Backend/API

Node.js

Advanced

PHP

Advanced

Golang

Basic

MySQL

Advanced

WordPress

Advanced

SQL

Advanced

Services

I can help with

Software
Engineering

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Software Engineering

Delivering scalable and maintainable solutions with over 3 years of hands-on experience in fullstack development.

  • Design and implementation of RESTful APIs and GraphQL endpoints

  • Microservices architecture using Node.js, Express, or NestJS

  • Authentication & Authorization (OAuth2, JWT, Role-based access control)

  • Integration with SQL and NoSQL databases (PostgreSQL, MongoDB, Redis)

  • Message queues and event-driven systems with BullMQ, RabbitMQ, or Kafka .

Web
Development

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Web Development

Crafting fast, accessible, and scalable websites that elevate your brand and drive results.

  • Building responsive UIs with HTML5, CSS3, and JavaScript (ES6+)

  • Modern frameworks: React, SvelteKit, Vue.js

  • Styling with Tailwind CSS, SCSS, and CSS Modules

  • SEO-friendly development with proper meta tags and accessibility

  • Dynamic, data-driven SPAs and SSR apps using Next.js or SvelteKit

  • Admin panels, dashboards, and internal tools

Wordpress
Development

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Wordpress Development

Custom, fast, and scalable WordPress solutions tailored to grow your online presence.

  • Custom Theme Development

  • Plugin Development & Customization.

  • Page speed optimization using caching, image compression, and lazy loading .

  • WooCommerce Development.

  • Multilingual & SEO Ready.

Qualifications

My journey
Education
Experience

Golang Development

Canada - ComIT
2024 - 2024

Web Development

Canada - Conestoga College
2022 - 2023

Software Engineering

Colombia - Universidad Distrital Francisco Jose de Caldas
2017 - 2018

Systems Engineer

Colombia - Corporacion Universitaria Rafael Nuñez
2011 - 2015

Software Engineer

MCAP - Canada
2024 - Present

Software Engineer

Dualboot Partners - USA
2022 - 2024

Ssr Node.js Developer

Globant - Colombia
2019 - 2021

Software Engineer

Banco Davivienda - Colombia
2019 - 2019

Software Developer

MDS - Colombia
2016 - 2018

Projects

Latest works
all Software Engineering Web Development Wordpress

Testimonials

My clients say

KOGHI

Cristian Sierra is a true asset to any development project. He was an integral part of our team working on Galeno, KTE, and Vtex_SAP, and his contributions were invaluable. Cristian's ability to develop, fix, and improve code implementations was truly impressive, and his attention to detail ensured that the end result was of the highest quality. He was always willing to go the extra mile to ensure that our projects were a success, and I couldn't be more grateful for his hard work and dedication.

LatOne Group

I highly recommend Cristian Sierra for his exceptional website migration skills. He successfully migrated our website from Bluehost to Godaddy with ease and efficiency, ensuring that everything was properly set up and functioning optimally. Cristian's attention to detail, technical expertise, and problem-solving abilities made the transition seamless.

Solum Digital

I had the pleasure of working with Cristian Sierra on a complex project for our client, Plastilene, and was blown away by his expertise and professionalism. Cristian successfully created a compound of Wordpress multisite, multi-domain, and multilingual, delivering a highly functional and user-friendly website. He also managed the migration process with ease and efficiency, bringing the site to the production stage in no time. Cristian's technical knowledge and attention to detail made the entire experience stress-free, and I couldn't be happier with the end result.

Get in touch

Contact Me

Say Hello!

Email

hello@cristiansierra.dev Email me

Whatsapp

+1 548-255-1056 Text me

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