Sandeep Amarnath
Technical Lead & Senior Full-Stack Developer · Founder, Staar Solutions
Senior Software Developer with 7+ years building scalable web and mobile applications using React, React Native, and modern JavaScript frameworks. Currently Technical Lead at Staples Canada and founder of Staar Solutions.
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Stack Overflow reputation
7.4M+
Developers reached
103
Answers written
7+
Years of experience
Top 3%
Toptal network
About
The story
I'm a Senior Software Developer with 7+ years of experience building production web and mobile applications. My career spans fintech (OANDA, Mackenzie Investments), marketplaces (Quartermaster), and large-scale e-commerce (Staples Canada), where I currently serve as Technical Lead.
My strength is full-stack React — from complex state management and multi-country i18n flows to AWS deployments and CI/CD pipelines. On mobile, I've independently built and shipped React Native apps for both iOS and Android across several companies.
I founded Staar Solutions to build products I'd actually use, and to take on client work where I can own the outcome end-to-end. In 2026 I was accepted into Toptal's top 3% network — the multi-stage process (logic test, live coding, technical interview, live project) is the most rigorous screening I've been through, and passing it was a meaningful benchmark.
I hold a Master of Engineering in Computer Networking from Dalhousie University, where I also served as a Teaching Assistant in Python.
Technical Skills
What I work with
Languages
- JavaScript
- TypeScript
- HTML
- CSS
- Python
- SQL
Frontend & Mobile
- React
- React Native
- Next.js
- Redux
- Zustand
- Context API
- React Query
- Tailwind CSS
- Styled Components
- NativeWind
Backend & APIs
- Node.js
- Express
- NestJS
- REST APIs
- GraphQL
- Supabase
- PostgreSQL
- MongoDB
- Oracle
Tools & Platforms
- Git
- Xcode
- Figma
- Storybook
- AWS (S3, CloudFront, Amplify)
- Vercel
- EAS (Expo)
- CI/CD Pipelines
- Shopify (Liquid, Storefront API)
- Algolia
- Contentful
- Cypress
- Playwright
- React Testing Library
Experience
Work history
Technical Lead
Staples Canada
Richmond Hill, ON, Canada
- Lead frontend development for staples.ca homepage, PLP, and PDP within a React/Shopify architecture, managing integrations across Algolia, Akeneo PIM, and Shopify Storefront API serving millions of Canadian customers.
- Manage a cross-functional team of 4 developers — conducting code reviews, sprint planning, and technical feasibility assessments.
- Orchestrating Bootstrap 4→5 migration to meet compliance requirements, building a comprehensive UI test suite from scratch.
- Resolved a critical production incident — duplicate SKU issue that uncovered $40K in lost revenue — within first two weeks of role.
Senior Software Developer
Quartermaster
Toronto, ON, Canada
- Led frontend migration of a React–Angular web app into a modern React architecture, reducing page load times by ~30%.
- Developed chat features for Homeowners and Pros using Stream Chat; implemented AI-driven requirement collection and project summaries.
- Built and maintained React Native apps for Homeowners and Pros, managing mobile app development independently.
- Deployed frontend builds to AWS S3/CloudFront; created reusable components with Storybook following a11y best practices.
Software Engineer
OANDA Corporation
Toronto, ON, Canada
- Built OANDA's user onboarding app with React and state machines, handling complex navigation across multiple countries and divisions.
- Implemented i18n supporting 18 languages and WCAG-compliant accessibility with keyboard navigation and screen reader support.
- Built dynamic workflows handling 100+ country-specific document submissions with robust Cypress end-to-end tests.
- Led development of a React Native mobile app for user consent management; mentored a team of 5 interns.
Associate Software Developer
Mackenzie Investments
Toronto, ON, Canada
- Built a performant ReactJS application to replace the legacy frontend of an internal tool, improving usability across multiple teams.
- Led implementation of a scalable email-sending service with Node.js and SendGrid — driving 25% improvement in campaign conversions.
- Engineered a high-performance app with Node.js, Express, and Oracle — reducing query time per user by 6–8 minutes.
Education
Master of Engineering, Computer Networking
Dalhousie University
Jan 2017 – Jul 2018 · Halifax, NS, Canada
Advanced Python coursework, distributed file-sharing system design, Twitter bot project. Served as Teaching Assistant mentoring students in Python programming.
Resume
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I'm on Toptal — top 3% of global talent
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