Sr. Staff / Staff / Senior Engineer - Full Stack

**About Evidation**

Evidation creates new ways to measure and improve health in everyday life—making proactive, personalized, and truly human-centered healthcare possible. By connecting directly with millions of individuals, Evidation harnesses real-world data to deeply understand health experiences, rapidly and at scale. Evidation’s privacy-centric digital health measurement and engagement platform uses data science and machine learning to translate these everyday insights into high-impact health guidance, treatments, and tools. Founded in 2012, Evidation is headquartered in California with employees working around the globe.

**About the role**

We’re seeking a **Staff Engineer to work on-site in Santa Barbara - someone who genuinely values being in-person, working side-by-side and building things together. The successful candidate will be equally comfortable architecting complex systems and diving deep into implementation. This isn’t a traditional full stack role—it’s for an engineer who is fully committed to integrating AI Agents, automation, and AI-driven tooling** into both their own workflow and the broader engineering practice.

As a Staff Engineer, you’ll set the standard for how **AI-augmented engineering** is done: solving hard problems across the stack, accelerating development velocity, and mentoring others to adopt AI-first ways of working.

**What you'll do**

• **Technical Leadership**
• * Lead design and architecture across backend (Ruby on Rails), frontend (Expo/React Native), and infrastructure.
• Provide deep technical expertise, guiding teams through complex architecture, trade-offs, and long-term technical investments.
• Drive the technical vision and strategy in alignment with company goals.
• Take ownership of critical technical areas, ensuring projects are delivered with quality and speed.
• Set and uphold high engineering standards, ensuring scalability, reliability, and maintainability in system design.
• Mentor engineers on both technical depth and effective use of automation.
• **AI-Driven Development**
• Define and champion best practices for *AI-first engineering workflows**.
• Experiment with and integrate **AI tools** into the software development lifecycle: design, coding, testing, deployment, and operations.
• Build frameworks and libraries that make AI-assisted development a repeatable, scalable practice.
• Reduce engineering toil by leaning on automation and AI-driven observability.
• **Product & Platform Execution**
• * Collaborate closely with product, design, and data teams to deliver measurable outcomes.
• Communicate complex technical concepts clearly to both technical and non-technical audiences.
• Build consensus across teams, fostering collaboration and alignment in technical decisions.
• Anticipate organizational technical needs and propose solutions that address company-wide challenges.
• Ensure reliability, scalability, efficiency and security of our solutions.

**Qualifications**

• **Technical Expertise**
• * 12+ years professional experience in software engineering with proven full stack capability.
• Deep knowledge of **Ruby on Rails and Expo/React Native**.
• Experience with **automated testing** (Playwright, Postman, or equivalent) and integrating tests into CI/CD.
• Proficiency with **CI/CD pipelines** (GitHub Actions or similar).
• Strong grasp of distributed systems, REST/GraphQL APIs, and modern cloud architectures (AWS).

• **AI Enthusiasm & Practice**
• Hands-on experience with *AI-assisted coding and automation tools**.
• Eagerness to stay on the bleeding edge of AI development trends (prompt engineering, agent-based workflows, automated testing).
• Ability to influence teammates in adopting AI-first practices.

• **Leadership & Influence**
• * Track record of driving architectural decisions or leading technical initiatives.
• Ability to mentor engineers and set technical direction across projects.
• Strong communication skills to work effectively across engineering, product, and leadership.

Nice to Haves

• **Infrastructure as Code (IaC): Pulumi / Go**
• * Experience building dynamic infrastructure beyond Terraform.
• **Data & Analytics: dbt + Snowflake**
• * Experience with modern data transformations (dbt) and cloud data warehouses (Snowflake).
• **Containerization & Orchestration: EKS + Helm**
• * Familiarity with deploying and managing services in Kubernetes (EKS).
• Experience with Helm for repeatable deployments and release management.