Weekend Shopify Developer Jobs in New York (NOW HIRING)

Job Summary:
Gamer's Choice is a leading destination for Trading Card Game players and collectors based in Queens, New York. They are seeking a skilled Senior Full-Stack Engineer to take ownership of their core internal platform that supports live stream and warehouse operations.
Responsibilities:
• Serve as the sole owner and architect of the internal software, a Node/Express backend, React frontend, and SQLite database that supports every core operational workflow at Gamers Choice.
• Maintain system stability, security, and resilience, including authentication and authorization, database safety, backups, migrations, and incident response.
• Establish and maintain instrumentation, logging, and reporting so operations leadership has clear visibility into key performance metrics.
• Design, build, and ship new features that directly improve revenue, including break configuration, promotional flows, and upsell experiences.
• Build operational efficiency features for picking, packing, tasking, and footage retrieval workflows.
• Participate in regular collaboration with the Chief of Staff and on-floor teams to identify pain points and translate them into well-scoped projects.
• Use AI coding tools in a disciplined way to compress idea-to-deployment cycles, while owning all code quality, testing, and peer review.
• Maintain clear documentation of architecture, critical workflows, auth models, and database safety practices.
• Establish runbooks and operational guides that enable other team members to perform common diagnostics and basic changes independently over time.
• Implement monitoring, logging, and a simple dashboard or views for 3–5 core KPIs, such as mispick rate, orders picked per labor hour, time from order to 'ready to ship,' and incident count.
• Establish a reliable, documented baseline for each KPI so future performance can be measured accurately.
• Identify and resolve known security vulnerabilities in the auth model, specifically privilege escalation and PIN brute-force vectors.
• Test and fully document a backup and restore process for the production database, with a clear step-by-step runbook.
• Produce clear documentation of system architecture, auth model, database safety mechanisms, and critical workflows within 6 months.
• Within 12 months, at least one additional team member should be able to perform common diagnostics and basic changes independently using those documents, without requiring your direct involvement.
Qualifications:
Required:
• At least 5 years of professional full-stack development experience with Node/Express and React, building production web applications.
• Demonstrated experience using AI coding tools (e.g., Claude, GitHub Copilot) as a core part of your workflow to ship faster, with concrete examples of how you verify and refactor AI-generated code.
• Prior experience building or owning internal tools for operations environments, logistics, warehouse, ecommerce, or retail, where reliability and efficiency had direct business consequences.
• Demonstrated ability to collaborate with non-technical managers and end-users; able to explain technical tradeoffs in plain language and work at the pace of the business.
• Willing and able to work on-site full-time in Long Island City, NYC, and to participate in an on-call rotation for urgent issues affecting live streams, fulfillment, or warehouse operations.
Preferred:
• Interest or background in Pokémon TCG, trading cards, or graded cards.
• Experience with livestream commerce platforms (TikTok, Whatnot, Twitch) or multi-channel ecommerce (Shopify, marketplaces).
• Experience with media-heavy applications, ffmpeg, image/QR/barcode scanning, S3-compatible storage (e.g., Cloudflare R2).
Company:
For the past five years, we’ve been a go-to destination for TCG enthusiasts locally in NYC and nationally online. Founded in 2020, the company is headquartered in Long Island City, NY, US, , with a team of 51-200 employees. The company is currently Growth Stage.