Demo

Software Engineer

Blue Signal Search
San Francisco, CA Full Time
POSTED ON 12/26/2025
AVAILABLE BEFORE 2/1/2026

Software Engineer

Location: Remote – U.S. or Global

Industry: AI-Driven HealthTech | Mobile & Web App Development | Digital Health


A stealth-mode innovator in digital health is building the next generation of personalized healthcare - using real-time data, AI agents, and high-fidelity user interfaces to help people live longer, healthier lives. This visionary startup is on a mission to revolutionize health monitoring and predictive health management, and they are hiring a Software Engineer to take the lead on both mobile and web-based frontends for a cutting-edge healthtech chatbot.


This is a unique opportunity to help build an end-to-end platform that fuses wearable data, advanced biometrics, and conversational AI. You’ll join a high-impact, early-stage team working directly with executive leadership, with massive equity upside and a clear roadmap to scale.


What’s In It for You

  • Founding-Level Equity – Participate in the company's growth with high-upside, low-cost equity.
  • Mission-Driven Work – Build technology that helps people live longer, healthier, more informed lives.
  • Next-Level Innovation – Use advanced AI, 3D graphics, and real-time health data in a platform built for massive scale.


Key Responsibilities

Mobile Development (iOS Focused)

  • Design and build high-performance iOS applications leveraging Apple HealthKit and other wearable integrations.
  • Implement features using Swift, SwiftUI, Combine, async/await, and optimize using Xcode Instruments.
  • Develop integrations with Apple Watch, StoreKit 2 for subscriptions and in-app purchases, and backend APIs.
  • Drive scalable architecture with secure handling of medical and biometric data for mass-market usage.

Web Platform Engineering

  • Develop high-speed, modern UIs using React, Next.js, and TypeScript for chatbot interactions and real-time visualizations.
  • Use advanced data visualization tools (e.g., D3.js, Plotly.js, Chart.js) to present complex health data.
  • Optimize performance across platforms with smart caching, SSR/ISR strategies, and best practices in web rendering.
  • Manage full deployment lifecycle via Vercel, Cloudflare, or equivalent CI/CD systems.

AI-Enhanced Engineering Workflows

  • Leverage AI tools like GitHub Copilot, OpenAI agents, or similar to increase development velocity.
  • Implement automated testing, code generation, and prototyping using LLMs and multi-agent workflows.
  • Explore generative UI patterns and LLM-integrated feature delivery across platforms.


Desired Experience

  • 5 years of experience in software engineering, ideally across both iOS (Swift) and web (React/Next.js) stacks.
  • Must have proven, hands-on experience developing with Apple HealthKit, including real-world integrations involving vitals, fitness, or wearable data.
  • Strong portfolio of mobile and web applications, especially those involving health, fitness, or wearable integrations.
  • Experience scaling consumer-facing platforms (100k users), particularly those involving real-time data.
  • Deep familiarity with Apple HealthKit, secure data handling, and subscription-based app monetization.
  • Passion for AI-driven engineering and optimizing developer productivity through automation and tooling.

Preferred Qualifications

  • Familiarity with 3D visualization using WebGL, Three.js, or similar.
  • Exposure to AI/LLM integrations (OpenAI, Claude, etc.), prompt engineering, or retrieval-augmented generation (RAG).
  • Backend experience (e.g., FastAPI, Redis, PostgreSQL) and deployment with Docker, Kubernetes.
  • Understanding of health data privacy standards and compliance.


This company operates in stealth, backed by accomplished serial entrepreneurs with a proven track record of successful exits and IPOs. They're not just building an app - they're shaping the future of healthcare. If you're passionate about life-changing technology and want to own major pieces of the frontend stack, this is the opportunity to make your mark.


About Blue Signal:

  • Blue Signal is an award-winning, executive search firm specializing in various specialties. Our recruiters have a proven track record of placing top-tier talent across industry verticals, with deep expertise in numerous professional services. Learn more at bit.ly/46Gs4yS

Salary : $100,000 - $250,000

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