React Native Engineer
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Downstream Systems, Inc. is a leading marketplace platform transforming the waste and construction industries from the ground up. We’re on a mission to bring simplicity, transparency, and speed to two of the most essential—but often overlooked—sectors of our economy. Location Dallas, TX / Richardson HQ Hybrid / local candidates preferred
About the Role:
We’re looking for a highly skilled React Native Engineer to help build and scale Downstream’s core mobile platform across both iOS and Android. This is not a lightweight companion-app role. Mobile is a critical part of our platform and operations. You’ll be working on complex, high-usage workflows used daily by contractors, suppliers, field teams, and enterprise customers managing real-world construction and logistics operations. We need someone who is deeply proficient in React Native and understands how to build performant, scalable mobile applications at a high level. You should be comfortable owning major mobile features end-to-end and solving difficult UX and engineering challenges in a fast-moving environment.
What You’ll Do:
- Build and maintain complex mobile applications in React Native for both iOS and Android
- Architect scalable mobile application patterns and reusable components
- Optimize app performance, responsiveness, stability, and offline workflows
- Work closely with product, design, and backend engineering teams to deliver production-ready features quickly
- Develop mobile experiences for logistics, procurement, equipment management, invoicing, project workflows, and real-time operations
- Integrate APIs, push notifications, maps, camera/photo uploads, authentication, and native mobile capabilities
- Debug and resolve production issues across multiple devices and operating systems
- Contribute to mobile architecture decisions, code standards, and engineering best practices
- Help drive the evolution of Downstream’s mobile-first operational workflows
What Success Looks Like:
- High-quality mobile features shipped consistently and quickly
- Fast, stable, and polished experiences across iOS and Android
- Strong ownership over app performance and reliability
- Ability to simplify complex operational workflows into intuitive mobile experiences
- Clean, scalable code that supports long-term platform growth
- Strong collaboration across engineering, product, and operations teams
Who You Are:
- Strong professional experience building production applications with React NativeDeep understanding of mobile application architecture, state management, performance optimization, and debugging
- Experience shipping and maintaining apps in both the Apple App Store and Google Play Store
- Comfortable working in fast-moving startup environments with high ownership
- Strong product intuition and attention to user experience
- Clear communicator who collaborates well cross-functionally
- Excited to build software that solves real-world operational problems in construction, logistics, and procurement
Nice to Haves:
- Experience with native iOS (Swift) or Android (Kotlin) development
- Experience with React Native
- Experience building marketplace, logistics, dispatching, or field-service applications
- Familiarity with offline-first architecture and real-time operational systems
- Startup or high-growth company experience
- CompensationCompetitive salary
- Company equity
Benefits package: Opportunity to grow with a fast-scaling marketplace platform
Why Join Us:
You’ll help build mobile products that directly impact how jobsite teams, suppliers, and operators get work done every day. This is not a “maintain a forgotten app” role. You will push things to production regularly. If you want to build important mobile software, move fast, solve real problems, and help modernize a massive industry, this is your shot.