Full Stack Developer

About Stem Health

Stem Health is reimagining the primary care experience for individuals who want a more thoughtful relationship with their health. Physician-led and membership-based, we combine medical excellence with the warmth of hospitality anchored in a beautifully designed flagship clinic at First Canadian Place, opening September 2026. Our care model is relationship-based, data-informed, and built on time, trust, and exceptional service.

Every experience a Stem Health member has booking an appointment, receiving their health results, navigating their care journey is shaped by the software we build. The same is true for every clinician who coordinates care, every administrator who manages the day, and every operator who keeps the clinic running. At Stem Health, technology is not a support function. It is how we deliver on our promise.

We are looking for a Full Stack Developer to join our technology team and take end-to-end ownership of the products and systems that power Stem Health. You will design, build, and maintain features across our member-facing applications, internal clinical tools, third-party integrations, and operational platforms working closely with our Applied AI Engineer, product team, and clinical and operations stakeholders to deliver software that is fast, reliable, and genuinely useful.

This is a high-ownership role in a small, building-mode team. You will be one of the primary engineers shaping Stem Health's technical foundation making architectural decisions that matter, shipping code that gets used, and helping set the engineering standard as the company grows.

• Design and deliver full-stack features across Stem Health's core product surfaces including the member portal, onboarding flows, appointment scheduling, care coordination tools, health dashboards, and internal clinical and operational interfaces.
• Own features from requirements and design to implementation, testing, deployment, and ongoing iteration maintaining full technical accountability for the code you ship.
• Collaborate with the product and design team to translate member and clinician needs into clean, performant, well-considered software.
• Write front-end code in JavaScript and HTML that is fast, accessible, and consistent with Stem Health's design system and back‑end code in Ruby on Rails that is well‑structured, testable, and built to last.

• Build and maintain integrations between Stem Health's platform and external systems including EHR/EMR platforms, diagnostic lab providers, scheduling tools, payment processors, communication services, and insurance or benefits APIs.
• Design and develop RESTful and GraphQL APIs that are secure, well‑documented, and built for reliability at production scale.
• Own the data layer: design schemas, manage migrations, optimize queries, and ensure data flows accurately and securely across the full system.
• Build and maintain webhook consumers, event‑driven workflows, and background processing pipelines that keep the platform responsive and operationally sound.

• Manage and improve Stem Health's cloud infrastructure including deployment pipelines, environment configuration, monitoring, alerting, and incident response across staging and production environments.
• Implement and maintain CI/CD workflows that support fast, confident deployments with appropriate automated testing and rollback capabilities.
• Ensure the platform meets the performance, availability, and reliability standards appropriate for a healthcare environment, with particular attention to data security, access control, and PHIPA compliance.
• Manage infrastructure costs and resource configuration proactively, ensuring the technical stack scales efficiently as the membership and team grows.

• Collaborate with the Applied AI Engineer to integrate AI‑powered features into the platform including LLM‑based interfaces, retrieval‑augmented search, workflow automation, and intelligent decision‑support tools.
• Build the production infrastructure that makes AI features…