Senior Full Stack Engineer

With our growing customer base and our expansion into new markets and use cases, we have more to build than ever at Affinity as we execute on our vision to put relationship intelligence at every professional's fingertips.

As a Senior Full Stack Engineer at Affinity, you’ll shape both the foundation and the future of our product. You’ll refine and evolve the features our customers already love while driving new, ambitious directions across the stack. From highly interactive, data-dense interfaces to the flexible backend models and scalable systems that power them, you’ll tackle complex engineering challenges that directly impact how customers manage their relationships and workflows.

We’re looking for a high-velocity engineer who thrives in dynamic environments—someone who can rapidly prototype end-to-end solutions, iterate quickly, and deliver measurable customer impact. If you’re equally excited by crafting polished user experiences and designing scalable backend systems, this role offers the opportunity to make a significant impact on Affinity’s product and vision.

In this role, you will: 

• Own product areas that are critical to the success of our customers and our business. 
• Act as a high-agency “glue person,” bridging technical and business needs to drive features from concept to production. 
• Deepen your technical fluency across the full application stack, from frontend frameworks to backend systems. 
• Shape technical direction through active participation in discussions, design reviews, and collaborative problem-solving.

Qualifications

Don’t meet every single requirement? Studies have shown that women and people of color are less likely to apply to jobs unless they meet every qualification. At Affinity, we are dedicated to building a diverse, inclusive, and authentic workplace, so if you’re excited about this role, but your past experience doesn’t perfectly align with the qualifications above, we encourage you to apply anyways. You may be just the right candidate for this or other roles.

• Have 5+ years of experience as a software engineer, working across the technologies that power modern web applications.
• Are a full-stack developer who genuinely enjoys working across both frontend and backend, seeking opportunities to build end-to-end solutions.
• Have strong experience with React (required) and ideally TypeScript.
• Have experience with Ruby or a demonstrated enthusiasm for learning it.
• Use AI tools in your development workflow to enhance productivity.
• Think from a business perspective, understanding how engineering decisions affect customers and company goals.
• Have led medium to large projects or technical initiatives and collaborated closely with product, design, and engineering peers.
• Have deep experience with relational and other database systems (e.g., NoSQL, document stores, key-value stores) and can design architectures that scale efficiently, handle high volumes of data, and maintain reliability under load.

Tech stack

Our platform is built with React and TypeScript on the front end, and with Ruby and PostgreSQL on the back end. Our infrastructure is hosted by AWS and runs on Kubernetes.

How we work:

Our culture is a key part of how we operate, as well as our hiring process:

• We iterate quickly. As such, you must be comfortable embracing ambiguity, be able to cut through it, and deliver value to our customers.
• We are candid, transparent, and speak our minds while simultaneously caring personally with each person we interact with. 
• We make data-driven decisions and make the best decision for the moment based on the information available.

If you’d want to learn more about our values click here.

What you'll enjoy at Affinity:

• We live our values: As owners, we take pride in everything we do. We embrace a growth mindset, engage in respectful candor, act as playmakers, and "taste the soup" by diving deep into experiences to create the best outcomes for our colleagues and clients.
• Health Benefits: We cover both you and your dependents' extended health benefit premiums and offer flexible personal & sick days to support your well-being.
• Retirement Planning: We offer an RRSP plan to help you plan for your future.
• Learning & Development: We provide an annual education budget and a comprehensive L&D program.
• Wellness Support: We reimburse monthly for things like home internet, meals, and wellness memberships/equipment to support your overall health and happiness.
• Team Connection: Virtual team-building activities and socials to keep our team connected, because building strong relationships is key to success.

Please note that the role compensation details below reflect the base salary only and do not include any equity, or benefits. This represents the salary range that Affinity believes, in good faith, at the time of this posting, that it will pay for the posted job.

A reasonable estimate of the current range is $113,300 - $160,000 CAD. Within the range, individual pay depends on various factors including geographical location and review of experience, knowledge, skills, abilities of the applicant.