Senior Full Stack Developer

Position: Senior Full Stack Developer

Location: Fully Remote

Salary: $70-$75 per hour INC

Job Type: Contract

Posting Type: Open vacancy

Role Overview We are seeking an experienced Senior Full Stack Developer to design, develop and scale innovative software solutions supporting next-generation smart shopping cart technology. This role combines backend engineering, frontend development and systems integration to deliver advanced retail automation capabilities powered by computer vision and connected devices.

You will contribute to the development of software across three core areas: Core Backend, Retailer Enablement and Retailer Tooling. The primary focus will be Retailer Tooling, including theft prevention workflows, real-time camera capabilities, cart tracking, human-in-the-loop (HITL) functionality, shift calendars, analytics and reporting.

Working closely with Software Engineers, Product Managers, Product Designers and Data Scientists, you will build scalable, reliable applications that enable retailers to deploy, monitor and manage smart shopping carts across multiple store locations. This is an opportunity to solve complex engineering challenges and contribute to technology that is transforming the grocery shopping experience.

About the Team The engineering team develops smart shopping cart technology powered by deep learning and computer vision to deliver a seamless, cashier less shopping experience. Its plug-and-play solutions enable retailers to introduce advanced shopping capabilities without extensive store renovations or significant infrastructure investments.

The engineering organization develops the backend systems, integrations and operational tools required to deploy, manage and operate smart carts at scale.

The three interconnected engineering areas include: - Core Backend: Backend services, infrastructure, developer tooling, engineering patterns and core business logic.

• Retailer Enablement: Integrations with retailer systems, retailer onboarding and the technical processes required to launch smart carts in stores.

• Retailer Tooling: Operational applications and workflows for smart cart management, including theft prevention, real-time cameras, cart tracking, human-in-the-loop functionality, shift calendars, analytics and reporting.

In this role, you will primarily contribute to Retailer Tooling while collaborating across these engineering areas to ensure smart carts can be deployed and operated effectively across retail environments.

What You’ll Own: - Design, develop and maintain full-stack applications and features supporting smart shopping cart technology.

• Build and enhance retailer-facing and internal operational tools for managing, monitoring and maintaining fleets of smart carts.

• Develop backend services, APIs and application logic using Java and related technologies.

• Build responsive, maintainable frontend applications using JavaScript and React.

• Develop workflows and tooling that help detect, investigate and mitigate potential theft using computer vision systems and cart data.

• Implement and enhance real-time camera capabilities, cart tracking and monitoring functionality.

• Build and maintain human-in-the-loop (HITL) workflows, shift calendars, analytics dashboards and reporting features.

• Develop scalable abstractions and self-service tools that simplify retailer onboarding and the deployment of smart carts in new stores.

• Contribute to backend infrastructure, developer tooling, reusable engineering patterns and core business logic.

• Integrate applications with retailer systems, APIs and other enterprise platforms to support seamless operations.

• Collaborate with Product Managers, Product Designers, Data Scientists and other engineers to translate requirements into effective technical solutions.

• Participate in technical design discussions and implement solutions that balance scalability, performance, reliability and maintainability.

• Write clean, well-tested and maintainable code, following established engineering standards and development best practices.

• Troubleshoot complex technical issues, improve application reliability and optimize system performance.

• Contribute to code reviews, automated testing, deployment processes and continuous improvement initiatives.

• Work independently across multiple projects, manage c…