Senior Software Engineer

Company Description ZeroStone is an operator-led AI transformation firm based in Toronto, Ontario, partnering with mid-market organizations ready to modernize their businesses. The team focuses on identifying high-impact AI opportunities within clients’ operations and delivers production-grade systems tailored to their data and workflows. With experience building and scaling companies, ZeroStone brings both operator perspective and strong engineering capabilities to each engagement. The firm emphasizes a human-centered approach, ensuring that clients receive AI solutions they can confidently own and lead independently. Joining ZeroStone means contributing to practical, value-driven AI initiatives across diverse industries. Role Description The Senior Software Engineer will design, build, and maintain production-grade software systems that power AI-driven solutions for ZeroStone’s clients. Day-to-day responsibilities include implementing and optimizing back-end services, integrating AI models into existing workflows, and ensuring scalability, reliability, and security of deployed applications. The role involves collaborating closely with cross-functional teams, including data scientists, product leads, and client stakeholders, to translate business needs into technical designs and high-quality code. The Senior Software Engineer will participate in code reviews, mentor other engineers, and contribute to technical standards and best practices. This is a full-time remote role. Qualifications Strong foundation in Computer Science, including algorithms, data structures, and systems design.Proficiency in Back-End Web Development and Software Development for production-grade applications.Advanced Programming skills with experience in modern languages and frameworks used for server-side development.Solid understanding of Object-Oriented Programming (OOP) principles and their application in large codebases.Experience designing and integrating APIs, microservices, and distributed systems.Familiarity with cloud platforms (e.g., AWS, GCP, Azure) and CI/CD pipelines.Ability to collaborate effectively in remote teams and communicate complex technical concepts clearly.Prior experience working with AI/ML-powered products or data-intensive systems is an asset.Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.