THE ROLE: Senior Full-Stack Developer You’re a passionate and capable Senior Full-Stack Developer who enjoys building thoughtful, intuitive products and solving complex technical problems. You get excited about creating user interfaces that make complex data easy to understand and act on. Develop and maintain full-stack web applications, with a strong focus on intuitive, reliable, and responsive user interfaces.

Build REST APIs and backend services that support product features, data integrations, and customer-facing applications. Turn complex Wi-Fi sensing and technical data into clear workflows, insights, and visualizations. Collaborate closely with engineering, product, design, and data science teams to design, test, release, and continuously improve scalable cloud-based features.

Write clean, maintainable, and well-tested code. Help improve application performance, reliability, usability, and the long-term quality of our platform. Bachelor's degree in Computer Science or a related field, or equivalent practical experience. ~5+ years of professional software development experience, with strong experience in front-end development. ~ Strong proficiency in React.js. ~ Robust proficiency in JavaScript/TypeScript and Node.js. ~ Experience with PostgreSQL. ~ Experience with automated testing frameworks such as Jest or Vitest. ~ Experience working in an Agile development environment, including JIRA and Git-based version control.

BONUS POINTS FOR Experience with cloud technologies such as AWS and Kubernetes.

Experience with message brokers, and time-series databases.

Experience working with data-intensive applications, dashboards, or visualization tools. We foster an open and agile environment where creative thinking, collaboration,



and technical excellence lead to meaningful innovation. We promote a healthy work-life balance in a flexible work environment and offer competitive salaries, an excellent extended health benefits plan, five weeks of paid annual time off, a fitness and wellness credit, and a free catered lunch in the office every day. competitive salaries an excellent extended health benefits plan a free catered lunch in the office every day Caregiver by Cognitive brings an ambient layer of awareness to the connected home, helping people age in place with greater safety, independence, and peace of mind.

Led by founders with deep expertise in silicon design, radio-frequency technology, and Wi-Fi sensing, Cognitive Systems has built a leading patent portfolio in motion intelligence. Built for real-world deployment, Caregiver supports both turnkey applications and API-based integrations, enabling in-home care organizations to move beyond traditional emergency-response solutions. The platform is easy to install, scales across large customer populations, and adapts to both informal and professional caregiving environments, helping providers stay connected and act with confidence even when they cannot be physically present.

We are an equal opportunity employer and consider all qualified applicants without regard to race, colour, ancestry, place of origin, citizenship, creed or religion, sex, sexual orientation, gender identity or expression, age, marital or family status, disability, veteran status, or any other characteristic protected by applicable law. We believe diverse perspectives and lived experiences strengthen our work and help us better serve our customers and communities. If you require an accommodation at any stage of the recruitment process, please email careers@cognitivesystems.

📌 Développeur Full-Stack / Full-Stack Developer (Ruby on Rails - React - Typescript) (Ontario)
🏢 Cognitive Systems
📍 Ontario