Senior Software Engineer, Fulfillment

Join a backend engineering team building the critical infrastructure behind large-scale, real-time fulfillment operations. In this role, you will design and develop reliable, high-performance systems that coordinate order routing, task allocation, fulfillment tracking, and shopper compensation. You will tackle complex logistics challenges across consumer and enterprise marketplaces while improving the experience for customers, shoppers, and retail partners. Working in a collaborative, cross-functional environment, you will help shape technical direction, strengthen system reliability, and establish engineering best practices. You will also leverage AI-assisted development tools to improve productivity and mentor fellow engineers. This is a remote opportunity for candidates based in Ontario, Alberta, British Columbia, or Nova Scotia.

• At least 5 years of professional backend software development experience.

• Proficiency in at least one backend programming language. Experience with Ruby, Python, or Go is relevant; Ruby experience is not required.

• Strong understanding of service and API design, including REST and RPC, database technologies, and system design principles for distributed and scalable applications.

• Hands-on experience building, deploying, and operating asynchronous, event-driven systems in production environments.

• Excellent communication and collaboration skills, with the ability to work effectively across complex, cross-functional teams.

• A bachelor's or master's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.

• Experience in fulfillment, logistics, or e-commerce software is preferred.

• Familiarity with workflow orchestration and state-machine-based systems is an advantage.

• Regular use of AI-powered coding tools, such as Claude Code or Codex, is preferred.

• Experience developing systems subject to regulatory requirements or financial compliance is an additional advantage.