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Senior Software Engineer, Products; Full-Stack Web

Job in Toronto, Ontario, M5A, Canada
Listing for: Whistle
Full Time position
Listed on 2026-01-12
Job specializations:
  • Software Development
    Software Engineer, Full Stack Developer
Job Description & How to Apply Below
Position: Senior Software Engineer, New Products (Full-Stack Web)

Who We Are

At Justworks, you’ll enjoy a welcoming and casual environment, great benefits, wellness program offerings, company retreats, and the ability to interact with and learn from leaders in the startup community. We work hard and care about our most prized asset - our people.

We’re helping businesses get off the ground by enabling them to focus on running their business. We solve HR issues. We’re data-driven and never stop iterating. If you’d like to work in a supportive, entrepreneurial environment, are interested in building something meaningful and having fun while doing it, we’d love to hear from you.

We're united by shared goals and shared motivations se are best summed up in our company values, which are reflected in our product and in our team.

If this sounds like you, you’ll fit right in.

About the New Products/International Team in Toronto

Get in on the ground floor of our new R&D office in Toronto as a front-end leaning Senior Full-Stack Engineer!

Over time, our office will grow into a pillar of the technology community in Toronto . We want to attract thought leaders, who are passionate about solving engineering problems to form the foundation of our team. Being a founding engineer means that you’ll have a high degree of impact and autonomy on how the engineering team and culture grow in Toronto.

Who You Are

Are you passionate about pushing the boundaries of design and development? Do you excel in crafting captivating user experiences and have a proven track record of building and maintaining large-scale front-ends? Are you ready to elevate your skills and embark on a thrilling journey with a team of innovators in a dynamic, entrepreneurial setting?

As a Senior Full-Stack Software Engineer (with deep expertise on the front-end) , you will be at the forefront of our cutting-edge projects, wielding your expertise in creating visually stunning and responsive user interfaces. You will play a pivotal role in shaping the user experience, ensuring seamless performance, and driving customer engagement. You will have the opportunity to take a project team from “zero to one” by leveraging your aptitude for navigating ambiguity and your experience working within a service-oriented architecture.

If you are someone who:

  • Has a founder’s mindset who enjoys building and scaling a team, setting standards, being a mentor
  • Places emphasis on a team finding the right answer ahead of any one person being the one who was right
  • Thinks in terms of outcomes rather than outputs
  • Avoids over-engineering solutions and appreciates how building software can be a means for learning, gaining insights, and ultimately solving problems that people actually have
  • We’d love to hear from you!

    What You Will Work On

  • Collaborate with a tight-knit, cross-functional team to find solutions to customer challenges
  • Take ownership of building full-stack (with a front-end tilt) flexible, test-driven software that minimizes tech debt and enables change
  • Support, monitor, and maintain integrations with industry-leading third-party platforms
  • Shape API-driven services that are secure, compliant, and highly auditable
  • Enable an experience that is fully internationalized and localized for a global customer base
  • Promote engineering excellence through technical leadership, knowledge-sharing and mentorship
  • Enhance our testing, monitoring, and continuous deployment infrastructure
  • Keep extremely sensitive data compartmentalized and secure
  • Perform other related duties as assigned
  • How You Will Do Your Work

    As a Senior Software Engineer , how results are achieved is paramount for your success and ultimately result in our success as an organization. In this role, your foundational knowledge, skills, abilities and personal attributes are anchored in the following competencies:

    Good judgment - the exercise of critical thinking, analyzing and assessing problems and implications, identifying patterns, making connections of underlying issues, understanding risks and developing mitigation strategies, and taking ownership of the outcome.

    Resourcefulness - taking a can-do approach, even in the face of obstacles and constraints by assessing what’s in front of you and effectively…

    Position Requirements
    10+ Years work experience
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