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Senior Front End Developer Jobs in Markham, ON (NOW HIRING)

Smile.io

Senior Front-End Engineer

Toronto, ON · Remote

... Senior Full Stack Engineer with specialization in Front-End development and a solid understanding ... Care about crafting delightful user and developer experiences * Are excited about how AI is ...

Accenture

Senior Front-End Web Developer

Toronto, ON · On-site

... senior or lead front-end developer, coaching and guiding engineers within your area of expertise Communicate frequently and directly with clients on project plans and scope Hold overall ...

SuiteSpot

Senior Front End Engineer

Toronto, ON · On-site

The Role We are hiring a Senior Front End Engineer to help us build world-class front-end ... DevOps, or team leadership if that interests you. The technical details Our front-end tech stack ...

Financeit

Senior Developer 1 - Front End

Toronto, ON

We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean, testable code to ...

Financeit

Senior Developer 1 - Front End

Toronto, ON · On-site

CA$120K - CA$130K/yr

We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean, testable code to ...

Financeit

Senior Developer 1 - Front End

Toronto, ON · On-site +1

CA$120K - CA$130K/yr

We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean, testable code to ...

EvenUp

Senior Frontend Engineer, Platform

Toronto, ON · Remote

CA$160K - CA$215K/yr

Frontend Systems: Lead the design, development, and optimization of robust frontend systems for ... & DevOps) and with a diverse group of people. * Experience owning a project from start to finish ...

EvenUp

Frontend Engineer, Growth & Agents

Toronto, ON · Remote

CA$160K - CA$230K/yr

As one of the senior frontend engineers on the team, you'll own technical decisions end-to-end, from shaping ambiguous product ideas through production. You'll partner closely with Product and Design ...

Pala Interactive

Senior Web Developer

Toronto, ON · On-site

The Senior Frontend Developer / Senior Web Developer will have primary responsibility for designing and implementing mobile gaming applications on an open source Linux platform using HTML5, Canvas ...

OPENLANE

Sr. Front-End Marketing Engineer

Toronto, ON · On-site

The ideal candidate is a front-end developer with strong HTML, CSS, JavaScript, WordPress, CMS, and modern web development experience. You'll help manage and evolve OPENLANE's marketing website ...

Atyeti Inc

Sr Python Developer

Toronto, ON · On-site

Collaborate with cross-functional teams including frontend, DevOps, and QA to deliver high-quality features. * Work with cloud platforms (e.g., AWS, Azure, GCP) to deploy and manage backend services.

Pala Interactive

Senior Web Developer

Toronto, ON

TheSenior Frontend Developer / Senior Web Developerwill have primary responsibility for designing and implementing mobile gaming applications on an open source Linux platform using HTML5, Canvas ...

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All JobsFront End Developer JobsSenior Front End Developer JobsSenior Front End Developer Jobs in Markham, ON

Senior Front End Developer information

See Markham, ON salary details

$41.7K

$114.8K

$161.5K

How much do senior front end developer jobs pay per year?

As of Aug 23, 2026, the average yearly pay for senior front end developer in Markham, ON is $114,842.00, according to ZipRecruiter salary data. Most workers in this role earn between $98,055.00 and $132,161.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a senior front end developer?

To thrive as a Senior Front End Developer, you need advanced proficiency in HTML, CSS, JavaScript, and modern frameworks like React, Angular, or Vue, along with a degree in computer science or equivalent experience. Familiarity with version control systems (e.g., Git), build tools (Webpack, Babel), and testing frameworks is typically required. Exceptional problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for delivering scalable, maintainable applications and ensuring a seamless user experience in complex web projects.

What are some common challenges senior front end developers face when leading projects, and how can they address them?

Senior Front End Developers often encounter challenges such as balancing the implementation of new technologies with project deadlines, ensuring code quality across a team, and coordinating with backend and UX/UI teams for seamless integration. Proactively setting coding standards, conducting regular code reviews, and fostering open communication with cross-functional teams can help mitigate these challenges. Additionally, staying updated on industry best practices and mentoring junior developers ensures both project success and team growth.

What is the difference between Senior Front End Developer vs Front End Developer?

AspectSenior Front End DeveloperFront End Developer
Required CredentialsBachelor's degree in CS or related field, experience with advanced JavaScript frameworksBachelor's degree or equivalent, basic knowledge of HTML, CSS, JavaScript
Work EnvironmentCollaborates on complex projects, mentors junior developersWorks on standard features, under supervision
Employer & Industry UsageTech companies, agencies, startupsSame as senior role, often entry-level
Search & Comparison IntentHigher experience, leadership, complex tasksEntry-level, learning, basic tasks

The main difference between a Senior Front End Developer and a Front End Developer lies in experience, responsibilities, and expertise. Senior developers handle complex projects, mentor others, and possess advanced skills, while front end developers focus on standard features and basic coding tasks. Both roles are essential in tech companies, but the senior position requires more experience and leadership capabilities.

What are the most commonly searched types of Front End Developer jobs in Markham, ON?

The most popular types of Front End Developer jobs in Markham, ON are:

What cities near Markham, ON are hiring for Senior Front End Developer jobs?

Cities near Markham, ON with the most Senior Front End Developer job openings:

Senior Front End Developer jobs near you
Infographic showing various Senior Front End Developer job openings in Markham, ON as of August 2026, with employment types broken down into 76% Full Time, and 24% Contract. Highlights an 81% In-person, 5% Hybrid, and 14% Remote job distribution, with an average salary of $114,842 per year, or $55.2 per hour.

Senior Front-End Engineer

Smile.io

Toronto, ON • Remote

Full-time

PTO

Re-posted 21 days ago

Job description

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.
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.
Our Tech Stack
  • User Facing Applications:
  • Ruby on Rails
  • Ember.js
  • React
  • Typescript
  • HTML
  • CSS
 
  • Services:
  • Ruby
  • Data Layer
  • PostgreSQL
  • ElasticSearch
  • Kafka
  • Amazon Simple Queue Service
  • Snowflake
  • Metabase
 
  • Environment & Infrastructure:
  • GitHub
  • DataDog
  • Amazon Web Services
  • Terraform
  • Vault
  • Helm
  • Kubernetes
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.
You'll Enjoy Working With Us 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
 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.
Why Smile?
 
Smile is a remote-first company built on trust, ownership, and continuous improvement. We believe great work happens when people feel supported, challenged, and empowered to do their best work.
 
You can learn more about our culture, values, and benefits on our careers page.

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 and identifying potential inconsistencies or verification signals in application materials based on available information. 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.
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