Senior Full Stack Developer (Contractor)

Triwill Group; Canada; Hybrid; CAD 110,000 - 140,000; Full time

Job summary

Triwill Group is partnering with a client to hire a Senior Full Stack Developer (Contractor) based in Canada. The role is hands-on, focusing on building intuitive, performant digital experiences and owning features from design to deployment.

You will work across front-end and backend Rails-based services, collaborate with product managers, designers, and engineers, and help set engineering standards while mentoring teammates and improving practices.

Qualifications

• Senior full-stack capability with strong front-end and Ruby on Rails experience.
• Experience building APIs and service-oriented architectures.
• Mentors teammates and helps set engineering standards.

Responsibilities

• Own user-facing features from design handoff through deployment.
• Contribute to backend development when needed.
• Collaborate with product managers, designers, and engineers to ship scalable experiences.
• Set engineering standards, review code, and mentor teammates.
• Focus on performance, accessibility, maintainability, and usability.

Skills

Front-end development

Ruby on Rails

APIs

Mentoring

Performance optimization

Tools

Rails framework

REST APIs

CI/CD

Job description

Description:

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Full Stack Developer (Contractor) based in Canada.

This is a hands-on engineering role focused primarily on building intuitive, performant, and accessible digital experiences.
You will take ownership of user-facing features from design handoff through deployment while contributing to backend development when needed.
The role combines strong front-end expertise with practical experience across APIs and Ruby on Rails-based services.
You will work closely with product managers, designers, and engineers to turn ideas into polished, scalable product experiences.
Performance, accessibility, maintainability, and usability will be central to the work you deliver.
As a senior contributor, you will also help establish engineering standards, review code, mentor teammates, and improve technical practices.
The environment values ownership, thoughtful collaboration, continuous learning, and a strong user-first mindset.