Senior Developer, Backend - Core Payments
Fullscript
Software Engineering
Ottawa, ON, Canada
Posted on Aug 6, 2025
About Fullscript
Founded in 2011, Fullscript started by solving one problem: helping practitioners access and prescribe the products they trust to deliver integrative care.
What began as a simple solution has evolved into a health intelligence platform that powers every part of care.
Today, 125,000 practitioners rely on Fullscript for clinical insights, lab interpretations, patient analytics, education, and access to high-quality supplements. They support over 10 million patients who use Fullscript to stay connected to their care plans, making it easier to stay engaged and follow through on treatment.
We build tools that make care smarter and more human. Tools that save time, simplify decisions, and strengthen the connection between practitioner and patient. When everything practitioners need is in one place, they can focus on what matters most: helping people get better.
🎟️ This is your invitation.
Bring your ideas. Bring your grit. Bring 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. You’ll join a team that:
⬦ Values innovation. We stay curious and keep finding smarter ways to make care better.
⬦ Supports growth. We learn together and take on new challenges that drive impact.
⬦ Puts people first. We win as a team and leave egos at the door.
📌 Apply now. Let’s build the future of healthcare together.
A Few Things to Know
We’re grateful for the high level of interest in joining Fullscript. Because of the number of messages we receive, we’re not able to review or respond to individual inquiries about open roles via email, LinkedIn, or other social platforms. Please apply directly through our careers page to ensure your application reaches our hiring team.
Fullscript is an equal opportunity employer committed to creating an inclusive workplace. Accommodations are available upon request. Email accommodations@fullscript.com for support.
All employment offers are contingent upon the successful completion of background checks, conducted in compliance with applicable federal, state, and provincial laws.
We also use AI tools to support parts of our hiring process, like screening and reviewing responses. Final decisions are always made by people. This process complies with privacy and employment laws across Canada and the U.S.
Learn More About Fullscript
💬 @fullscriptHQ on instagram
