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-a-service, forms-as-a-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 c