Frontend Developer
Posted: Oct 22, 2025
Job Description
Role: Senior Frontend Developer (Cornerstone JS)Location: Toronto, Canada (Onsite) Duration: Fulltime / ContractDescription:The Senior Software Developer is responsible for creating clean, modern, scalable, secure, and maintainable code for SaaS based web products. The successful candidate will join a team building our Zero-Footprint Viewer leveraging cornerstone.js. They have a strong technical ability, great communication skills, and are motivated to achieve results in a fast-paced environment.Reports to: Software Development Manager Job Level: Individual Contributor Responsibilities:• Architect, design, develop and test new software• Stay current in technologies and software development practices, assisting leadership in researching and recommending new technologies• Collaborate with team members to build high quality software• Communicate with software users to design technical solutions to business problems• Integrate software components into a fully functional software system• Create unit and integration tests for implemented projects and bug fixes• Perform requirements analysis and update requirements and design documentation based on actual project implementation• Review and update internal tracking systems regularly• Assist and advise Support department as needed to assist with customer issues• Mentor other team members based on area of expertise• Establish development patterns• Review team members code/projects and communicate areas for improvements• Assist and participate in check-ins and performance reviews• Perform other related duties as requiredSkills:• You have experience creating a medical image viewer like OHIF using cornerstone.js/cornerstone3D• ReactJS & JavaScript skills• Web programming and knowledge of browser standards• Experience consuming/using RESTful APIs• Solid understanding of DICOM, web standards• Extensive experience with mission critical, 24x7, Tier-1 services• Able to thrive in a fast-paced, quickly evolving, tech start-up environment• Experience contributing to a collaborative, dynamic, and diverse teamYou will REALLY stand out if you also have following• Prior experience creating radiology / cardiology Image viewers• Delivered an application with a micro-frontend architecture• Experience writing automated tests• Experience leading a team or mentoring other engineers
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