Senior Full-Stack Developer

Location: Toronto, Ontario, ca

Company Description

The Klick Group- comprising Klick Health (including Klick Katalyst and btwelve), Klick Media Group, Klick Applied Sciences (including Klick Labs), Klick Consulting, and Klick Ventures—is an ecosystem dedicated to realizing the full potential of our people and clients in life sciences. Founded in 1997, we have offices in New York, Philadelphia, Saratoga Springs, Toronto, London, São Paulo, and Singapore. Consistently named a Best Managed Company, Most Admired Corporate Culture, and Great Place to Work, Klick is committed to fostering a high-performance, people-first culture with creativity, collaboration, innovation, and impact across everything we do.

About our Technology Craft

Our Technology craft builds scalable digital products, platforms, and tools that power impactful experiences for our clients and teams. We collaborate closely across disciplines to design, develop, and evolve systems that are secure, intuitive, and future-ready. The team brings deep expertise in engineering, architecture, data, and emerging technologies to solve complex problems with practical, human-centered solutions.

Job Description

This role develops scalable full-stack applications and tools that support internal teams, with a dedicated focus on integrating AI capabilities into production systems. The Senior Full Stack Developer contributes across the development lifecycle—architecture, implementation, deployment, and optimization—while collaborating with multifunctional partners to deliver high-quality, reliable solutions. The position is ideal for someone who enjoys working across multiple layers of technology and navigating evolving AI technologies in a practical, grounded way.

• Lead full-stack development efforts from design through deployment, with emphasis on AI-enabled functionality.
• Collaborate across teams to identify opportunities to embed AI-driven solutions into existing systems and workflows.

• Develop and maintain front-end and back-end components, ensuring code quality, scalability, and performance while supporting both new builds and existing applications.

• Conduct code reviews, contribute to architectural decisions, and support shared engineering standards.
• Build and improve data integrations, APIs, and tools that streamline and automate processes.

Qualifications

Required:

• 8+ years developing web applications in a full-stack environment (back-end dominant).
• Experience with AI frameworks, libraries, or model integration patterns.
• Experience working with architecture patterns, distributed systems, or data-driven applications.
• Experience with .NET Core or similar backend frameworks.
• Experience with SQL-based databases (e.g., MS SQL Server, BigQuery) and advanced query design.

Desired:

• Experience with modern HTML, JavaScript, and CSS.
• Ability to work across multiple technologies and contribute to varied tooling needs.
• Experience with API development and testing tools.
• Ability to share knowledge and collaborate across disciplines. 
• Knowledge of cloud-based AI solutions (Azure, AWS, or Google Cloud).

Additional Information

This posting is for an existing vacancy at Klick.

Join a collaborative, growth-focused culture where your ideas are valued and your career is built. The base salary range for this position is between CAD $100,000- 122,500. The final amount offered will be determined based on several factors such as a candidate's work location, their unique skill set, education, and prior work experience. We believe in transparency, equity, and helping every employee thrive.

#LI-Hybrid #LI-JP1

Our Commitment to Inclusion

Klick uses an AI-powered tool as part of an automated process to support our hiring process by analyzing your experience, skills, and qualifications to help identify alignment with role requirements. Please note that the tool does not make final decisions or automatically disqualify candidates. Hiring decisions are made by our team, with thoughtful human judgment and oversight. We are committed to fair and transparent hiring practices and have implemented safeguards to help mitigate bias and support compliance with applicable laws. If you have questions, accessibility needs, or concerns about the use of this tool, please contact us. Klick is consciously creating a culture where everyone can thrive and grow in their careers. We believe that our best work comes from our diverse backgrounds, perspectives, and skills. We strongly encourage members of historically underrepresented communities to apply, including Black people, Indigenous peoples, and other people of color, people with disabilities, people from gender and sexually diverse communities and people with intersectional identities. We're also committed to developing an inclusive, barrier-free recruitment process and work environment. Should you require any accommodation, please contact us at [email protected] and we will work with you to meet your accessibility needs and ensure you have a positive experience.