Senior Fullstack Engineer

leantechio; Medellín; On-site; COP 120,000,000 - 180,000,000; Full time

Job summary

Global Technology Services in Medellín, Colombia, seeks a Senior Fullstack Engineer with deep Shopify expertise to build, customize, and maintain high-performing e-commerce experiences. The ideal candidate combines Shopify storefront mastery with strong front‑end and back‑end development, API integrations, payment processing knowledge, and a focus on UI/UX and conversion.

This role owns production Shopify environments, troubleshoots issues, and works closely with business stakeholders to deliver

Qualifications

• 5+ years of professional experience as a full‑stack developer.
• Strong Shopify storefront development experience.
• Experience with REST and GraphQL APIs.

Responsibilities

• We will build, customize, and maintain high-performing e-commerce experiences.
• Own production Shopify environment, troubleshoot issues, and work with stakeholders.

Skills

5+ years

Shopify storefronts

REST/GraphQL APIs

HTML

CSS/SCSS

JavaScript

Responsive design

Node.js / Python / Ruby / PHP

API integrations (shipping, payments)

PCI/tokenization knowledge

UI/UX for ecommerce

Production support

Communication

PaySafe / Stripe / etc.

Git / CI/CD

Tools

Git

CI/CD

Job description

Company Overview:

Global Technology Services is a rapidly expanding organization situated in Medellín, Colombia. We pride ourselves on possessing one of the most influential networks within software development and IT services for the entertainment, financial, and logistics sectors. Our corporate projections offer a multitude of opportunities for professionals to elevate their careers and experience substantial growth. Joining our team means engaging with expansive engineering teams across Latin America, Philippines and the United States, contributing to cutting-edge developments in multiple industries.

Position Title: Fullstack Engineer

Category: Software Development

Seniority: Senior

Location: LATAM

What you will be doing:

We are looking for a Senior Shopify Developer with strong full-stack web development experience to build, customize, and maintain high-performing e-commerce experiences.

The ideal candidate combines deep Shopify storefront expertise with strong front‑end and back‑end development skills, API integrations, payment processing knowledge, and a strong understanding of UI/UX and conversion‑focused e-commerce. This person will be comfortable taking ownership of a production Shopify environment, troubleshooting issues independently, and working directly with business stakeholders.

Required Skills & Experience

• 5+ years of professional experience as a full‑stack developer or in combined front‑end/back‑end web development roles.

• Strong hands‑on experience building and customizing Shopify storefronts.

• Strong understanding of REST and/or GraphQL APIs.

• Proficiency with:

  • Shopify Liquid

  • Shopify theme architecture

  • Shopify APIs / Admin API

  • HTML

  • CSS/SCSS

  • JavaScript

  • Responsive and mobile‑first development

• Back‑end development experience with at least one modern language/framework, such as Node.js, Python, Ruby, or PHP.

• Experience integrating third‑party platforms through APIs, particularly shipping, tracking, payment, or e‑commerce services.

• Understanding of online payment processing, including tokenization and PCI compliance considerations.

• Strong UI/UX sensibility with an understanding of e‑commerce conversion and customer experience.

• Experience independently supporting and troubleshooting production e‑commerce sites.

• Strong communication skills and the ability to translate business requirements into technical scope.

• Familiarity with online payment processing and credit card handling best practices (tokenization, PCI compliance considerations); direct experience with PaySafe or a comparable payment processor (Stripe, Braintree, Authorize.net, etc.) is a strong plus

Nice to Have

• Direct experience with AfterShip or similar post‑purchase/shipment‑tracking platforms
• Experience with e‑commerce conversion optimization and analytics tools (GA4, Shopify Analytics, heatmaps)
• Experience with version control (Git) and basic CI/CD practices
• Background supporting a small business or startup as the sole or lead technical resource
• Experience in travel, logistics, shipping, or golf/sporting goods e‑commerce

Soft Skills

• Strong problem‑solving and debugging skills

• Ability to work independently and take ownership of projects

• Strong communication skills with the ability to articulate, diagram and document complex engineering concepts.

Why you will love GTS:

• Join a powerful tech workforce and help us change the world through technology

• Professional development opportunities with international customers

• Collaborative work environment

• Career path and mentorship programs that will lead to new levels.

Join GTS and contribute to shaping the data landscape within a dynamic and growing organization. Your skills will be honed, and your contributions will play a vital role in our continued success. GTS is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.