Senior Front-End Engineer

Smile.io is the world’s largest loyalty platform, providing easy-to-use reward programs that help scaling ecommerce brands transform one-time sales into repeat purchases from loyal customers. Over 100,000 brands use Smile to turn transactional purchases into passionate repeat shoppers.

We currently power over 100,000 rewards programs, reaching more than 500 million customers, and serving 1 million API requests per hour. Our primary stack is Ruby on Rails, Ember.js , and React.

The engineering team at Smile.io believes in being proud of your code, owning what you ship, and embracing new tools to increase developer happiness. We believe small and agile empowered teams can ship products with the highest impact.

We are looking for a highly skilled and experienced Senior Full Stack Engineer with specialization in Front-End development and a solid understanding of Back-End development to join our dynamic team. As a key member, you’ll play a crucial role in designing, constructing, and maintaining our shopper-facing applications and merchant-facing program management tools, ensuring their quality, reliability, scalability, and performance. You will actively participate in running experiments and building incrementally, working in an agile environment to drive innovation and deliver outstanding outcomes.

This is a full-time remote role working in Canada, Monday to Friday, with significant overlap with 9 AM - 3 PM EST.

About the Program Squad

The Program Squad is a team that spans the entire technical stack, and is focused on providing the functionality merchants need to create and manage effective loyalty programs. They are responsible for building and maintaining features that influence repeat purchase rates, optimizing program configuration, enhancing the shopper journey, and improving the merchant experience. The team takes an iterative and experimentation-based approach to crafting functionality that delights users and feels native to the Shopify platform.

How We Work at Smile

You’ll likely enjoy working at Smile if you:

- Are open to trying new things, being wrong, and learning from mistakes

- Prefer collaboration and shared success over individual heroics

- Want to move fast, deliver real value, and own the progress of your work

- Look for opportunities to improve how work gets done — for yourself and others

Everyone at Smile is driven by these core values:

Be Humble - think of the team before thinking of yourself. We have no room for massive egos.

Be Hungry - set hard goals, ask lots of questions and learn every day.

Be Human - show empathy towards others, consider the impact of your decisions on other teams.

What You’ll Work On

• Write, test, instrument, document, and maintain software for Smile.io .
• Review code and provide thoughtful, constructive feedback for your team.
• Collaborate closely with Product, Design, and Engineering teams to build new features.
• Support a highly available service used by millions of users on a daily basis. Champion productive technical discussions and foster collaboration within the team.

Who You Are

• Possess a minimum of 5 years of technical experience in software engineering or a related field, with senior-level expertise in front-End development and hands-on experience across the full stack.
• Have expert-level proficiency in modern Front-End frameworks (Ember.js and/or React using TypeScript), substantiated by relevant professional work experience.
• Have working proficiency in back-end development, with experience building, maintaining, and debugging server-side systems.
• Have experience with Ruby on Rails or another back-end framework/language (e.g., Node.js, Python, etc.); Ruby on Rails experience is highly valued but not required.
• Have experience using AI tools to solve real-world engineering problems: improving developer productivity, code quality, and product outcomes.
• Curious, adaptable, and excited about how AI is reshaping software development.
• Skilled in utilizing observability tools such as DataDog and Grafana to troubleshoot multi-system level issues effectively.
• Experienced with Postgres or similar databases.
• Experienced in building and maintaining high-traffic systems.
• Experienced in test automation practices.
• Familiar with agile methodologies and the ability to thrive in a fast-paced environment.

⭐ Bonus if You Have

• Experience developing apps for the Shopify platform, including familiarity with Shopify APIs.
• Hands-on experience with Amazon Web Services, Docker, Kafka, and/or GraphQL.
• Understanding of database optimization techniques, including indexing, various types of locks, and strategies for optimizing slow queries.
• Experience in mentoring and fostering the professional growth of junior colleagues.
• Deep experience crafting high-quality, accessible, and performant Front-End user experiences at scale.

Our Tech Stack

• User Facing Applications:

Services:

• Data Layer

Environment & Infrastructure:

Compensation & Benefits

• Base Salary: $150,000 CAD - $160,000 CAD
• In addition, our generous total rewards package includes things like flexible vacation, a remote work allowance, and a monthly credit to use at any of the store 100,000+ stores that uses our software. Check out our careers page to learn more.

Sounds like the role for you? We’d love to hear from you! Even if you’re not 100% sure about potential fit, we still encourage you to apply. We’re looking for the right person, not the perfect series of checkboxes.

Our Commitment to Candidates:

At Smile, we understand that finding a new role is challenging and that self-doubt or imposter syndrome can prevent you from applying to a role, don’t let it! You have a ton to offer and we want you to feel encouraged to apply, even if you don’t check all of the boxes. If you are passionate about eCommerce and helping merchants grow through loyalty and reward, connect with us. 

At Smile, we rely on a range of backgrounds, experiences, and ideas. We value diversity, and we’re proud to be an inclusive, equal opportunity workplace. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Smile welcomes and encourages applications from people with disabilities. Accommodations are available on request for candidates taking part in all aspects of the selection process.

AI Disclaimer: At Smile, we’re strong advocates for using AI to help speed up iteration, increase productivity, and save our human brainpower for the really challenging problems. While we’re happy for AI to help you generate or tailor your resume, we’d ask that you please refrain from using AI to answer any of the questions on this application form, or to answer questions during the interview process itself.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.