
Gurjit Singh Sidhu
Verified Expert in Engineering
Full-stack Developer
Vancouver, BC, Canada
Toptal member since May 19, 2017
Gurjit has 10+ yrs in cloud architecture (AWS/GCP), agile delivery, and team leadership. Gurjit is currently focused on agentic AI development — using Claude Code and Cursor daily, with AI-assisted workflows integrated into CI/CD for automated production deployments. Experienced bridging traditional engineering rigor with AI-native tooling.
Portfolio
Experience
- Full-stack - 10 years
- Architecture - 10 years
- Python - 8 years
- Shopify Plus - 7 years
- React - 4 years
- Large Language Models (LLMs) - 4 years
- Claude Code - 2 years
- Cursor AI - 2 years
Preferred Environment
Cursor AI, Claude Code
The most amazing...
...project I've created is a service that accepts a face photo, then generates a 3D head model and creates a preview animation in a few seconds.
Work Experience
Tech Lead
PGT
- Adopted AI-assisted development workflows using Claude Code, integrating LLM tooling directly into the engineering process to accelerate iteration cycles and reduce time-to-feature.
- Applied prompt-driven architecture practices — breaking features into well-scoped specs before implementation — improving clarity of requirements and consistency of output across frontend and backend.
- Leveraged agentic coding tools for code review, refactoring, and exploratory analysis, shifting focus from syntax to system design and business logic.
Full-stack Developer
Tropicana Brands - Main
- Built and managed custom applications integrated with Synapse and Databricks warehouses to fetch, collate, and analyze data. Developed specific use cases on top of this data using React, Python, and RDBMS.
- Maintained legacy apps and built visual dashboards to analyse various integration jobs.
- Worked as a full-stack developer on a React app and Python API.
Tech Lead
EZWS LLC
- Developed a web app for routing alcohol orders to distributors. It featured a React/Redux front end and a Python API back end, handling orders from various retail endpoints.
- Worked on this app that intelligently routed orders based on criteria like licenses, SKU availability, and inventory. It integrated with platforms like Shopify and FedEx, enhancing operational efficiency.
- Improved the client's order management significantly. Because the app was hosted on Google Cloud Platform, it utilized Google App Engine, VMs, and MySQL DB, ensuring robust performance and scalability.
Software Developer
NatureCity
- Acted as a lead developer and migrated from a legacy asp website to Shopify. After the migration, I managed website enhancements and maintenance.
- Built a private app that interacted with various 3rd-party apps used at NatureCity.
- Handled site enhancements/updates and managed Shopify scripts/flows to support various business rules.
Full-stack Developer
Nash
- Worked with four Nash team members to provide integrations for Shopify stores.
- Used Python, GraphQL, and Postgre DB for the implementation.
- Used Shopify APIs and Webhooks to show local delivery rates (if available) during checkout.
Full-stack React Developer
PartnerSlate
- Worked on building the front end for document signing and sharing flow.
- Involved in refactoring the codebase to reduce network calls and making the UI more responsive.
- Developed new APIs for planned features in Django and Python.
Shopify Developer
TextConnects
- Developed and customized the global nav, product page, homepage, and various pages for microkickboard.com and gemlux.com.
- Created Shopify scripts for custom discounting of products based on product tags and user tags.
- Worked on multiple short-term projects, all related to Shopify customizations.
Shopify Developer
DecoratorsBest
- Helped in the migration of a legacy website built in ASPX to Shopify.
- Modified a Liquid theme and created Liquid templates per the shop's needs.
- Wrote Shopify scripts to handle shipping and cart discounts based on user roles and other business rules.
- Maintained and enhanced HTML parsers and Shopify API to keep products on Shopify in sync with partner stores.
- Used Shopify flows, and custom scripts to build specific user flows for email marketing.
React Front-end Developer
App Factory | Golden
- Built the front end for the MVP in React.
- Developed various screens including a rich dashboard with multiple charts/graphs and estimators.
Full-stack Software Engineer
Scoutible
- Built a dashboard app for an AI-based recruitment startup.
- Developed various API services to support the front end (on the Google App Engine and Python).
- Created the dashboard, the applicants' pages, and front-end pages using React/Redux.
- Integrated the app with third-party providers like Salesforce and Greenhouse.
Full-stack React Developer
Perfect Venue
- Developed a marketplace for event and spaces that enable users to add and update venues/spaces and to search for events based on various filters.
Shopify Developer
Betsy and Brandts
- Selected a free Shopify theme and updated it as per the UI specified in the Sketch files.
Technology Lead | Co-founder
Kloneworld Pte Ltd
- Developed REST services for the creation of PDFs, personalized movies, and more.
- Architected and developed a franchise web app. It was used by various vendors to create personalized animations/ books.
- Created a unified payment services API module that integrated with many payment gateways.
- Architected and developed supporting web applications to configure books, animations, and diagnostics.
Technology Advisor
Frrole
- Developed an API layer that exposed Frrole.AI social intelligence services.
- Created a scalable widget platform for supporting client-specific Frrole.AI widgets.
- Developed a Bootstrap CSS-based newspaper based on the Frrole API.
Program Manager | Software Development Manager | Technical Fellow
Versata (Trilogy)
- Worked as a program manager for service platform enhancements and maintenance for a client in North America.
- Contributed to a performance enhancement project, developing Sprite Services, enhancing the Base64 CSS, automating the minifying of scripts/CSS files, and more.
- Managed the migration of a microsite made in legacy ASP to Java.
Experience
DecoratorsBest | Shopify Store
https://www.decoratorsbest.com/Perfect Venue
https://www.perfectvenue.comScoutible Dashboard
https://hire.scoutible.com/signin?next=%2FBetsyandBrandts.com | Shopify Store
Ford Services Platform
Racing.Ford.com
Microkickboard via Textconnects.com
https://microkickboard.comMigration to Shopify
https://www.naturecity.com/• Built a private app to interact with apps.
• Led development for website enhancements/updates.
• Managed Shopify scripts/Shopify flows to support various business rules.
Skills
Libraries/APIs
React, Shopify API
Tools
Shopify Plus, Claude Code, Google Analytics, Claude, GitLab CI/CD
Languages
Python, Python 3
Platforms
Shopify, Salesforce, Google Cloud Platform (GCP), Amazon Web Services (AWS), Blockchain, Pega, Docker
Storage
NoSQL, PostgreSQL
Other
Full-stack, Technical Leadership, Architecture, Large Language Models (LLMs), Shopify Scripts, Machine Learning, eCommerce, Llama 3, Cursor AI
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