Fullstack Engineer, Mobile Observability

Position Overview

• Location Type: Not specified
• Job Type: Full Stack Engineer
• Salary:
  • Zone 1 (San Francisco/Bay Area or NYC Metropolitan Area): $187,000 - $223,700
  • Zone 2 (Boston, DC, Irvine, LA, Monterey, Santa Barbara, Santa Rosa, Seattle): $168,200 - $210,300
  • Zone 3 (All other US locations): $158,900 - $198,600 Exact compensation may vary based on skills, experience, and location. Includes Restricted Stock Units (RSUs), health, vision, and dental insurance, and mental health benefits in addition to salary.

LaunchDarkly is seeking an experienced Full Stack Engineer to join our Observability team. The mission is to empower developers with best-in-class telemetry tools for monitoring, analysis, and debugging of mobile applications in real time. You’ll build intuitive interfaces and robust instrumentation systems to redefine mobile observability, helping engineering teams safely deploy features and diagnose incidents faster. You’ll work across two product areas:

Mobile Platform – Data Ingestion & Visualization: Develop sophisticated, user-friendly UIs to visualize telemetry data (metrics, logs, traces) collected from mobile applications and lead development of the playback of user sessions captured by the mobile SDK.

Mobile Instrumentation & SDK Development: Build, maintain, and enhance React Native (and similar) SDKs, ensuring efficient collection and transmission of telemetry data from mobile apps while working closely with OpenTelemetry standards to offer developers easy-to-integrate solutions.

If you’re passionate about creating intuitive user experiences, robust mobile SDKs, and innovative telemetry solutions, we’d love for you to join our Observability team!

Responsibilities

• Design and implement mobile telemetry SDKs, instrumentation libraries, and developer tools in React Native or similar frameworks.
• Develop performant, scalable mobile applications for visualizing and interacting with real-time telemetry data.
• Collaborate cross-functionally with UX designers, product managers, backend engineers, and native mobile developers to create cohesive, end-to-end observability experiences.
• Prototype, build, and optimize APIs and mobile-specific data pipelines to handle high-volume data ingestion efficiently and reliably.
• Participate actively in architecture planning, code reviews, and mentoring peers in mobile full-stack best practices.
• Drive improvements in engineering standards, tooling, and mobile performance metrics across LaunchDarkly.

Qualifications

• 5+ years of experience developing full stack web applications. Familiarity with React Native (or similar cross-platform frameworks such as Flutter or Xamarin) is a plus.
• Familiarity with telemetry frameworks (OpenTelemetry, Firebase Performance Monitoring, Sentry, Datadog Mobile) and integrating observability features in mobile apps. Familiarity with the LaunchDarkly product and SDKs is a plus.
• Strong experience developing performant mobile APIs, network optimizations, and efficient client-server data exchange techniques.
• Experience utilizing AI tooling to enhance daily engineering efficiency.
• Ability to design robust, scalable systems and deep familiarity with algorithms, data structures, and concurrency principles specific to mobile environments.
• Strong collaboration, communication, and problem-solving skills; committed to continuous learning about emerging technologies and mobile best practices.

About LaunchDarkly

Modern software delivery was supposed to be the foundation for a thriving digital business but reality has proven otherwise. Slow, inefficient development cycles, costly outages, and fragmented customer expe