Senior Front-End Engineer

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.

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 from professional work experience in modern Front-End frameworks (Ember.js and/or React using TypeScript)

Have working proficiency in back-end development, with experience building, maintaining, and debugging server-side systems.

Have experience with back-end frameworks or languages (e.g., Node.js, Python, Ruby on Rails etc.)

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.

You'll Be Successful In This Role If You

Care deeply about writing maintainable code

Communicate clearly and thoughtfully in writing

Have good product instincts and can balance quality, scope, and speed

Prefer pragmatic, iterative decision-making over perfectionism

Are comfortable learning through research and hands-on problem solving

Know when to ask for help and when to push forward independently

Care about crafting delightful user and developer experiences

Are excited about how AI is reshaping software development and the potential it unlocks

Nice to Have (But Not Required)

Ruby on Rails experience is highly valued but not required.

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.