Senior Software Engineer (Node.js, React) We're looking for a senior engineer who can take ownership of complex systems, make sound technical decisions, and drive meaningful outcomes. You'll work across the full stack - backend services, frontend applications, infrastructure, and data - with significant autonomy over how problems get solved. This isn't a role where someone hands you tickets. You'll assess tradeoffs, identify what matters, and ship solutions that move the business forward.

Key Responsibilities: Make technical decisions with business awareness - evaluate options, assess risks, understand downstream impact, and choose the right path - not just the clever one

Own systems end-to-end - from database schema to API design to UI, across multiple services

Analyze impact before acting - understand how changes propagate through interconnected services, data pipelines, and scheduled jobs before committing to an approach

Improve what exists - identify bottlenecks, reduce fragility, expand test coverage, and modernize legacy code pragmatically

Design for reliability - build systems that handle failure gracefully, with proper observability, error handling, and recovery

Set technical direction - establish patterns, review architecture, and raise the engineering bar for the team Tech Stack:

Backend: Node.js, Express, TypeScript

Frontend: React, Vite, Tailwind CSS

Databases: MongoDB, MySQL

Caching: Redis

Infrastructure: Docker, cloud deployment (DigitalOcean), Turborepo Monorepo

Scheduling: Cron-based job orchestration

Integrations: REST APIs, web scraping, proxy management Technical Skills:

Strong production experience with TypeScript/Node.js and Express

Solid skills across MongoDB and MySQL - schema design, query optimization, migrations

Experience building and maintaining React frontends

Hands-on with Docker, cloud infrastructure, and CI/CD pipelines





Experience with Monorepo architecture and multi-service systems

Demonstrated ability to make technical decisions independently - weighing tradeoffs, assessing blast radius, and communicating rationale clearly

Strong impact analysis skills - you think through second-order effects before making changes to production systems

Experience with web scraping, proxy rotation, and third-party API integration at scale

Familiarity with Redis caching and scheduled job orchestration Nice to Have:

Experience with AWS services (EC2, ECS, Lambda, RDS, S3, CloudWatch, or similar)

Familiarity with Kubernetes - container orchestration, deployments, scaling, and cluster management

Experience with observability platforms (Datadog or similar)

Background in e-commerce, marketplace integrations, or dynamic pricing systems

Experience leading small engineering teams AI Usage:

AI tools are a core part of how we work: Claude Code and Cursor are used daily for development - code generation, refactoring, debugging, and architectural reasoning

We expect you to be proficient with AI-assisted development and use it to move faster without sacrificing quality

Experience applying AI/ML to business problems (optimization, forecasting, anomaly detection) is a plus Who You Are:

You think before you build. You ask "what breaks if this changes?" before writing code

You communicate decisions clearly - to engineers and to non-technical stakeholders

You take ownership of outcomes, not just tasks





You're pragmatic - you ship working solutions and improve iteratively rather than chasing perfection

You're comfortable with ambiguity and can turn vague problems into concrete plans Here at Frontier Dental, we are a diverse team that nurtures an inclusive environment. We attribute our growth significantly to our ability to learn from one another’s perspectives.

Frontier

Dental values the unique skills and experiences of each of our candidates; recognizing that each prospective team member contributes to our efforts in building a diverse and inclusive place to work. We are committed to being an equal prospect employer and are happy to provide accommodations upon request at all stages of the recruitment process. Should you require any disability-related accommodation to support your participation in our recruitment process, please notify us and we will work with you to meet your accessibility needs.

The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not to be construed as an exhaustive list of all responsibilities, duties, and skills required of employees so classified. All employees may be required to perform duties outside of their normal responsibilities from time to time, as needed.

Frontier Dental uses an automated Applicant Screening Tool to assist in reviewing applications. This tool evaluates candidates based on job-related criteria, including skills, experience, and qualifications listed in your application materials. You may request an alternative, non-automated assessment or an explanation of how the evaluation was conducted by contacting [email protected]. All notices and candidate requests will be documented for compliance purposes

📌 Senior Software Engineer (Node.js, React) (Markham)
🏢 Frontier Dental
📍 Markham