Full-Stack Engineer (Contract – Part-Time, Remote)

Full-Stack Engineer (Contract – Part-Time, Remote)

• Company website link – https://www.saymello.com
• Company name – mello
• Location – Toronto, ON (Remote Role)
• Postal Code – M5H 2N2
• Region – Ontario
• Company Office local Address – 100 Queen St W, Toronto, ON M5H 2N2 (remote-based)
• Contact info – info@saymello.com
• email address – careers@saymello.com
• Country – Canada
• Job Type – Part-Time, Contract, Remote
• Job Average Salary rate – $100,000 – $150,000 yearly (pro-rated for part-time contract)
• Currency – CAD

Job description

About Us

mello is a Y Combinator (S21) backed start-up that integrates wellbeing into every employees’ workflow in order to unlock their full potential. We are paving the path for the future of work. Our vision is to help every remote team on the planet to work healthier, more sustainably, and learn how to stay mello instead of burning out.

As second time founders, we burnt out building our last company during the pandemic. We wanted a simple, easy-to-use solution that integrates right into our workflow to increase our wellbeing but couldn’t find anything on the market so we decided to build the solution we would’ve liked to use ourselves (aka, eating your own dog food).

At mello, we’re building the new standard that remote and hybrid companies use to track, measure and act on burnout to inspire happier, healthier, more motivated teams. mello suggests smart actions for both employees, managers as well as HR to take to increase wellbeing, productivity and retention.

About this Role

As a modern Full-Stack Engineer, you are well versed in all aspects of development from a transistor to a website, including the browser, OS, CPU, RAM, architecture and everything. Here in mello we are much, mello-er, in requirements:
• You will be responsible for both front end UI elements and experiences, as well as integrating, and maintaining / modifying backend services as required. The split is expected to be 63.5 / 37.5[1]
• You will ensure the app can scale from 1000 to a million users
• You will contribute and define our engineering values, process, and deployment cacadence, with scalability and security in mind.

Technical Skills you have:
• IAM / OAuth (e.g. AWS Cognito, Okta)
• Frontend frameworks i.e. React.js (Hooks preferred), Vue.js
• In-depth CSS knowledge i.e. SCSS, Sass
• 3rd party integrations experience with OAuth, SDK (i.e. AWS SDK), and API backend (BFF)
• Develop, improve, and fix custom API backend as required
• SPA Cloud deployment i.e. AWS S3 / Amplify, Netlify, Firebase a plus
• Experience with Database ORB a plus

What you’ll be doing
• Experience with modern Front end frameworks e.g. React.js (Hooks), Vue.js and Gatsby. Familiarity with analytics is a plus.
• Experience with OAuth flows and implementation / integration with 3rd party service
• Experience with Front end deployment services e.g. AWS Amplify, Netlify, firebase
• Experience with different data fetching / caching strategy and design tradeoffs, principles, and practices to help guide the team’s technical direction
• Experience with Test Driven Development and proficiency with a testing framework e.g. Jest
• Experience with API integration as well as development. No stranger when comes to resolving CORS related nonsense
• Experience with Database is a plus.
• A strong desire to build secure software and protect user information.

“Excerpt from the official job listing”

See full job description from the company website.

Job Summary

mello is hiring a Part-Time Contract Full-Stack Engineer for remote work based in Toronto. The role requires developing and maintaining scalable web applications, collaborating with product teams, and ensuring user-focused, performant solutions that support mello’s growing digital platform.

About Us

mello is a technology-driven company focused on rethinking digital engagement and communication. Combining user-centric design with modern technology, mello builds tools that simplify human connection and create intuitive, scalable solutions.

Culture and Work Environment

Our culture embraces innovation, autonomy, and collaboration. Remote engineers thrive in a supportive environment that values curiosity, creativity, and accountability. Shared knowledge and teamwork define our approach to problem-solving.

Why Work With Us

Engineers at mello gain opportunities to work on exciting emerging technology projects with competitive pay and flexibility. This role provides autonomy, growth potential, and room to influence the technical roadmap of a scaling digital company.

Key Responsibilities

• Design, develop, and maintain full-stack applications
• Collaborate with designers and product managers to define technical solutions
• Implement scalable APIs and integrate third-party services
• Optimize applications for performance, reliability, and security
• Participate in code reviews and contribute to best practices

Key Qualifications

• Strong proficiency in JavaScript, React, Node.js (or similar frameworks)
• Experience with databases (SQL/NoSQL), RESTful APIs, and cloud platforms (AWS, GCP, or Azure)
• Solid debugging and problem-solving skills
• 3+ years of full-stack development experience
• Excellent communication skills and ability to collaborate in remote settings

Benefits & Perks

• Competitive contract salary (100K–100K–150K CAD annually, pro-rated)
• Fully remote, part-time flexible schedule
• Opportunity to work on innovation-driven projects
• Professional growth within a scaling tech startup
• Autonomy and direct impact on product direction

Location Insights

While based in Toronto, this role is fully remote, offering flexibility for engineers Canada-wide. Toronto’s tech ecosystem provides networking and growth opportunities for professionals in future-driven startups.

Summary Table Details Information Job Title Full-Stack Engineer (Contract, Part-Time, Remote) Employer mello Location Toronto, Ontario, Canada (Remote) Salary Range $100,000 – $150,000 CAD (pro-rated) Job Type Part-Time, Contract, Remote Common 5 Interview Questions and Tips

Describe a complex full-stack project you’ve built. What technologies did you use? – Highlight technical depth.

How do you ensure your applications are scalable and secure? – Emphasize best practices.

What challenges have you faced in remote collaboration, and how did you solve them? – Show adaptability.

How do you approach debugging and performance optimization? – Detail systematic methods.

Why do you want to work with mello? – Align your passion with the company’s innovative focus.

Tip: Be prepared to demonstrate your coding and architectural skills through examples, and highlight remote collaboration experience.

Market-Based Salary Overview and Analysis

Full-Stack Engineers in Toronto typically earn 90K–90K–140K CAD annually, with senior or contract specialists reaching 150K+CAD∗∗.mello’s offered range of∗∗150K+CAD∗∗.mello’s offered range of∗∗100K–$150K CAD is at the higher end, reflecting its demand for strong technical ownership in a contract-based, flexible arrangement.

Disclaimer

We aggregate publicly available job listings and link to the original source. We are not the hiring company and do not manage the recruitment process. Please apply only through the official careers website above.

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mello is hiring a Part-Time Contract Full-Stack Engineer (Remote, Toronto-based) with 100K–100K–150K CAD annualized pay, flexibility, and opportunities to influence product development in an emerging tech company.

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