Senior Developer, Backend - Core Payments
Fullscript
Software Engineering
Ottawa, ON, Canada
Posted on Aug 6, 2025
About Fullscript
We’re an industry-leading health technology company on a mission to help people get better. We started in 2011 with one simple idea. Make it easier for practitioners to access the products they trust so they can deliver better care.
That simple idea grew into a platform that powers every part of care. Today, more than 125,000 practitioners use Fullscript for clinical insights, lab interpretations, patient analytics, education, and access to high-quality supplements. Over 10 million patients rely on Fullscript to stay connected to their care plans and follow through on treatment.
We build tools that make care smarter and more human. Tools that save time, simplify decisions, and help practitioners stay closely connected to the people they care for. When everything they need is in one place, they can focus on what matters most: helping people get better.
This is your invitation.
Bring your ideas, your grit, and your care for people.
Join us and shape the future of care.
We are currently looking for a senior backend developers who want to build a platform to create rich, stable, and compelling experiences for our users. Fullscript is written with Ruby on Rails, and our Ruby Engineers build and maintain our internal GraphQL API. They work directly with our front-end engineers to build out functionality on the Fullscript platform. On the front end, we’re using React, TypeScript, and Apollo to create top-notch experiences for our users.
Our team cares about doing things well, and about the developer experience on the team. We host in-house training on all sorts of topics, from React all the way through to Kubernetes. Fullscript is a place where you’ll be encouraged to learn, mentor, and grow.
This is how we like building software: https://fullscript.com/developer-handbook. If you share our values, we’d be excited to talk with you!
On the Core team, you will work with the financials, contributing to projects related to payments, checkouts, or our e-commerce engine.
What you'll do
- Take ownership and responsibility for building, shipping, testing, deploying, and maintaining checkout iterations & implementing business logic our e-commerce platform core
- Build scalable backend applications to support the growing needs of the business
- Review pull requests, mentor, and be an advocate for high-quality code that makes future development faster, easier, and better.
- Scope, plan projects, and work with other developers (front-end and back) to implement them
- Give input on high-level architecture decisions and communicate those decisions
- Solve performance issues within our checkout and payment systems
- Other duties determined by the company from time to time
What you bring to the table
- You are a passionate software engineer who cares about your craft. You are excited to learn, and lead projects and want to produce the best work possible
- Experience with Ruby or Ruby on Rails
- Experience making meaningful contributions to the scalability and reliability of complex systems
- Experience architecting simple solutions to complex problems
- You write tests and understand their value
- You have a desire to learn and are open to feedback
- Understanding of design patterns and clean code
- Experience mentoring or coaching junior engineers
Bonus if you have
- Experience scaling or working on high-scale web applications
- Past experience working in e-commerce or health-tech sector
- Worked with Stripe or other payment providers
- Experience with React and GraphQL or similar technology
- Experience working with Javascript or JS frameworks (React, Vue, AngularJS, Next or similar)
- Understanding of CSS frameworks like Bootstrap, as well as CSS preprocessors
What we can offer you
- Generous PTO and competitive pay
- Fullscript’s RRSP match program for financial health
- Flexible benefits package and workplace wellness program
- Training budget and company-wide learning initiatives
- Discount on Fullscript catalog of products
- Ability to work Wherever You Work Well*
Why Fullscript
Great work happens when people feel supported, trusted, and inspired. At Fullscript, we stay curious and keep finding smarter ways to make care better. We grow together, take on new challenges, and focus on impact. We put people first, work as a team, and leave egos at the door.
What to Know Before You Apply
We’re grateful for the interest in joining Fullscript. To make sure your application reaches our hiring team, please apply directly through our careers page. We’re not able to respond to individual messages about open roles on email or social channels.
Fullscript is an equal opportunity employer committed to creating an inclusive workplace. Accommodations are available upon request at accommodations@fullscript.com.
All offers are contingent on successful background checks conducted in compliance with federal, state, and provincial laws.
We use AI tools to support parts of the hiring process, including screening and reviewing responses. Final hiring decisions are always made by people and follow all applicable privacy and employment laws in Canada and the U.S.
Learn More
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