Full Stack Developer (USA, Remote)

About Soulside

Soulside AI is transforming how behavioral health organizations operate, unlocking massive efficiency gains through AI. Our platform cuts documentation time by 80%—turning 3+ hours of daily paperwork into 30 minutes—so these organizations can focus resources on patient care, growth, and innovation. The impact is immediate: better outcomes, reduced costs, and the ability to serve more patients without adding administrative overhead.

We’re scaling fast and building the infrastructure that will power mental healthcare for decades. This is your chance to join as an early engineer and shape a platform that every behavioral health organization will depend on. You’ll build technology that directly improves millions of lives while capturing an enormous market opportunity. The timing is perfect, the problem is real, and the upside is massive.

Why this role matters:

• Own features end-to-end—from the React interfaces clinicians touch every day to the distributed backend services that process sensitive healthcare data.
• Work directly with founders on architecture decisions that will scale with our growth.
• Build across the full stack: high-fidelity UIs with React & TypeScript, and distributed systems using Spring Boot & Kafka.
• Ship technology that directly reduces clinician burnout and expands access to quality mental health care.

Our momentum speaks for itself:

✅ Backed by Counterpart Ventures, GreyMatter Capital, Sarah Smith Fund & Kaya Ventures ✅ UCSF Rosenman Healthtech Innovator 2024 ✅ OneMind Accelerator 2024 & PeakXV Spark Program ✅ Global Top 10 - Confluent Data Streaming Challenge

The Role

We’re seeking a Full Stack Developer to join our core team as we build technology that transforms behavioral health care. As one of our early engineering hires, you’ll have outsized impact on our product, technical architecture, and company culture.

You’ll build responsive, high-performance web applications with React and TypeScript, and you’ll design the backend services—running on Spring Boot and event-streaming platforms—that power our AI-driven platform behind them. This role spans the whole stack: you’ll translate multifaceted clinical requirements into clean UIs and well-structured, scalable backend logic, and you’ll own major features from architecture through deployment.

This is a unique opportunity to shape the technical foundation of a company that’s revolutionizing mental health care, with meaningful equity upside and the autonomy to make decisions that scale with our growth. This is a remote role open to candidates based in the United States.

What You’ll Do

• Full-Stack Feature Development: Build and maintain responsive, high-fidelity web applications using React and TypeScript, backed by core services written in Spring Boot.
• Backend & Distributed Systems: Architect and develop backend services that process sensitive healthcare data, leveraging message queues and streaming platforms (SQS, Kafka, Kinesis) for high-volume asynchronous workloads.
• Complex Data Implementation: Design and implement the technical logic and schemas that power the platform, translating multifaceted domain requirements into structured, scalable configurations across the frontend and backend.
• LLM Integration: Design and optimize LLM pipelines, including prompt engineering, usage monitoring, and quality assurance to validate structured AI outputs.
• Reliability & Observability: Implement monitoring, alerting, and observability (e.g., Prometheus, Grafana), along with data reliability patterns such as redundancy, retries, and graceful failure handling.
• Security & Compliance: Apply security best practices using Spring Security, implement RBAC, and help ensure HIPAA compliance for clinical data.
• Platform Reliability: Proactively identify, troubleshoot, and resolve bugs and support issues across the stack to ensure a seamless experience for clinicians.
• Foundational Decisions: Make technical decisions—and build the internal tooling and workflows—that will scale as we grow from ten clinics to ten thousand.
• Collaboration: Work directly with founders and clinical teams to translate healthcare needs into scalable technical solutions.

Who You Are

• End-to-End Owner: You’re comfortable moving between pixel-level UI polish and backend architecture, and you own features from design through production.
• Detail-Obsessed: You have an eagle eye for precision—you notice the small inconsistencies others miss, whether in…