Senior Fullstack Developer

Reason One is hiring a Senior Fullstack Developer to build innovative products for clients like Emory Healthcare, Children's Nebraska, and Beacon Health.

As a Senior Fullstack Developer, you'll lead the technical delivery of enterprise CMS solutions for U.S. healthcare organizations - integrating code and design with CMS functionality on hybrid platforms (Sitecore, Optimizely, Kontent.ai) and on fully composable stacks that pair a specialist platform to each need: Storyblok for CMS, Coveo for search, VWO for personalization, Jotform for HIPAA-compliant forms. Experience with the clinical and operational platforms common in healthcare digital is a plus: EHRs (Epic, Cerner), patient portals (MyChart), and provider management tools (Kyruus Health, DexCare).

Healthcare is complex, deeply human work. You'll join a growing B Corp on a mission to improve digital access and equity in healthcare, building products that deliver real results for health systems, patients, and their communities.

Your role

This position is titled “Senior” for a reason — we’ll expect you to troubleshoot and resolve issues independently, but also know when to ask for help if needed. Our ideal candidate is comfortable communicating with clients in writing and face‑to‑face (or video), and shows a keen awareness of timeline and budget.

Your Mission

Design and deliver comprehensive, high-quality solutions that seamlessly integrate front-end and back-end technologies.

Responsibilities

• Write high-quality, reusable code following industry best practices
• Develop (in collaboration with other team members) creative, functional, maintainable, and performance-driven web applications, websites and components.
• Document application architecture, development workflows, and internal processes that enable knowledge transfer to teammates.
• Take part in code reviews - peer review pull requests and provide actionable feedback.
• Project-based work and contributing to our internal library of reusable components.
• Provide estimates on work efforts.
• Provide senior-level support to developers on your team through mentoring and helping them debug issues
• Ensure strong team collaboration. Lead by example. Drive team communication.
• Ability to demonstrate Reason One’s core values day to day
• Participation in our B Corp mandate to improve our social and environmental impact

Our must haves

• 3+ years in a technical leadership role such as tech lead, team lead, or principal web developer within an agency
• Significant professional experience using React (5+ years), Next.js (4+ years - including recent App Router work), and TypeScript (3+ years)
• Excellent knowledge and proficiency with tools of the trade, including HTML, CSS (SCSS), JavaScript, WebPack, Git
• 3+ years professional experience architecting and implementing websites that make use of multiple platforms and services i.e. MACH architecture that includes headless CMS, search-as‑service, forms-as‑service etc.
• 3+ years professional experience working with an enterprise headless CMS such as Optimizely, Sitecore AI, Storyblok, or Kontent.ai.
• 3+ years professional experience developing and consuming APIs (GraphQL, REST)
• Professional experience integrating clinical and operational healthcare platforms, including EHR systems (Epic, Cerner), patient portals (MyChart), and provider management tools (Kyruus Health, DexCare, Sparkle).
• Experience with serverless functions / edge workers (Vercel, Cloudflare Workers, Azure Functions, AWS Lambda)
• Able to setup and own DevOps for projects you are leading using GitHub Actions with deployments to targets on platforms such as Vercel or Netlify
• Strong debugging skills combined with experience using performance and load testing tools.
• Practical experience using AI assistants such as Claude in day‑to‑day work, with sound judgement about task suitability, verifying outputs, and handling confidential information appropriately.
• Excellent communication skills with the ability to explain the technical aspects of a project to non-technical people
• Ability to handle multiple competing projects in a fast-paced environment
• Ability to contribute to the whole process from concept and research to implementation and ongoing maintenance.
• Professional experience working with agile practices (backlo