Android Engineer (Android / Java / Kotlin)

Ampa Open · verified Oct 24, 2026

Remote United States Full-time Mid-level Mobile Engineering

At a glance

Mid-level Mobile Engineering role at Ampa. Remote, United States · full-time · $140,000–$200,000 base.

SalaryStated by Ampa

$140,000 – $200,000

Base salary for this role, in USD per year, as published in the posting.

RoleMobile Engineering

SeniorityMid-level

LocationUnited States

WorkplaceRemote

EmploymentFull-time

Base pay$140,000–$200,000

PostedJun 25, 2026 · 4mo ago

Role brief

techroles summary, based on the employer's posting.

What you'll do

Build the Android tablet app clinicians use to operate the TMS device, with polished Java and Kotlin interfaces
Keep tablet-to-device USB serial communication working, and implement binary commands, checksums and message queues
Use native bridges to move frequent telemetry between Java or C++ and TypeScript, including sensor readings and pulse logs
Protect treatment records through disconnections, backgrounding and hardware faults, then sync session data to AWS through secure REST APIs
Set Android coding practices, review code and coach junior engineers

What you bring

At least five years building production Android apps with Java and Kotlin
Expert React Native and TypeScript skills, plus strong Redux Toolkit knowledge
Experience with USB, serial, UART or similar device protocols and handling binary data
A solid grasp of the React Native Bridge or JSI, and Android camera or hardware integration

Who this fits

This mid-level role suits an Android engineer who cares about UI polish and dependable behavior in clinical settings. You’ll work full-time, either remotely in the United States or in person; Palo Alto or the Pacific Time Zone is preferred. Expect a high-intensity, fast-changing environment and long hours.

From the employer

Ampa is a pioneering neurotechnology startup developing brain stimulation technology to help eradicate depression. We will improve millions of lives by making this transformative treatment universally accessible. Joining us means you’ll be part of a rapidly growing startup with significant equity opportunities and a major impact on our future.

What to Expect: Working at Ampa is a rare chance to help transform global mental health and save millions of lives — a level of impact that demands deep commitment. Success here requires resilience, adaptability, and the discipline to put in long hours. If you thrive in a high-intensity, fast-changing environment and want your work to truly matter, you may do the best work of your life here.

Role Overview:

We're seeking an exceptional Software Engineer to own the development of our clinical Android tablet application — the primary interface between clinicians and our TMS medical device. You'll build beautiful, responsive interfaces in Java and Kotlin, and ensure they integrate seamlessly with our backend systems and custom hardware. You'll also collaborate with our React/React Native engineers on our broader platform. You will be responsible for the bridge between high-level patient management UI and low-level medical hardware. Your work will involve managing real-time data streams, binary serial communication, and ensuring 100% data integrity for clinical treatment records.

This role is ideal for an engineer who's obsessed with UX, has an eye for detail, and builds polished Android experiences that work reliably in high-stakes clinical environments.

Tech Stack:

Application: Android (Java / Kotlin), React Native, TypeScript
Web: React, TypeScript
Backend (interfacing with): Python, PostgreSQ
Cloud: AWS (ECS, S3, CloudFront)

Key Responsibilities:

Hardware Integration: Maintain and optimize the USB Serial communication layer (RS232/USB) between the Android tablet and proprietary TMS hardware.
Native Bridge Development: Build and maintain high-performance Native Bridges (Java/C++ to TypeScript) to handle high-frequency telemetry (heartbeats, sensor data, and pulse logs).
Lifecycle & State Management: Manage complex application states using Redux Toolkit, ensuring that medical treatment data remains consistent even during hardware disconnections or app backgrounding.
Binary Protocol Engineering: Implement and debug custom binary protocols, including packet encoding/decoding, checksum validation, and serial command queuing.
Safety & Error Handling: Develop robust "Safety Interlock" logic to monitor hardware telemetry and trigger immediate software-level shutdowns in the event of hardware faults (overvoltage, overheating, etc.).
Medical Data Integrity: Ensure the reliable collection and synchronization of clinical session data to AWS cloud backends via secure REST APIs.
Engineering Leadership: Help establish Android coding standards, mentor junior engineers, and review code for quality and maintainability

Required Technical Skills:

Frameworks: Expert-level React Native (0.75+) and TypeScript.
Languages: Proficiency in Java (Android Native) and TypeScript/JavaScript.
State Management: Advanced knowledge of Redux Toolkit (Slices, Async Thunks, and Middleware).
Communication Protocols: Experience with USB/Serial communication, UART, or similar low-level protocols.
Binary Data Handling: Comfort working with ArrayBuffers, Uint8Array, Hexadecimal conversions, and Bitwise operations.
Mobile Architecture: Deep understanding of the React Native Bridge and/or JSI (JavaScript Interface).
Networking: Experience with Axios, JWT-based authentication, and TLS security.
Hardware Support: Experience with UVC Cameras, Gyroscopes, and Accelerometer integration on Android.

What We’re Looking For:

Mission Obsessed: Passionate about eradicating depression.
Driven: Highly motivated and resilient.
Effective: Learns fast, adapts quickly, and consistently delivers results.
Android Mastery: 5+ years of experience building production-grade Android applications in Java and Kotlin
Frontend Sensibility: Strong UI/UX instincts — you care as much about how it looks and feels as how it works
Mobile Expertise: Hands-on experience shipping Android apps, with USB hardware and/or camera integration a strong plus

Why Join Ampa?