Sr. Software Engineer, Mobile
About The Position
We are looking for a Sr. Software Engineer to own Plug's commercial partner mobile experience - from first architecture decision to App Store launch. We operate a complex commercial process involving various partners. You'll build the React Native apps the partners use to move cars through Plug's pipeline. You'll design the data models and backend APIs that power it, set up the integration layer with various APIs and make the foundational architecture calls. There are no existing mobile apps. You'll report to our head of engineering and work directly with our SVP Product & Technology and external partner contacts as primary stakeholders.
Requirements
- 5+ years of hands-on experience developing and delivering production applications; 2+ years React Native experience required with at least one shipped iOS + Android app.
- Experience building B2B SaaS or partner portal products - understands org-level RBAC and multi-tenant data isolation.
- Proficiency with Expo: Expo Router, EAS Build, push notifications (APNs + FCM), and cross-platform (iOS, Android) from a single codebase.
- Demonstrated proficiency in TypeScript across the full stack - backend API development, PostgreSQL schema design, and REST integrations.
- Experience with B2B auth systems: WorkOS, Clerk Organizations, Auth0 Organizations, or comparable org-level identity and impersonation patterns.
- Real-time data experience in a mobile context: WebSockets or SSE for live feeds, push notification dispatch from the server side.
- Hands-on experience deploying and operating cloud-hosted applications; comfort with AWS/ECS, Terraform, CI/CD pipelines, and observability tooling.
- Operates in agentic development workflows - defining clear acceptance criteria, and reviewing AI-generated output with a high quality bar.
- Prior startup experience and a track record of owning work end-to-end: scoping, shipping, and measuring impact.
- Authorized to work in the US for any employer.
Responsibilities
- Lead the design and implementation of the commercial partner mobile apps in React Native (Expo) and web apps: vehicle pipeline tracking and operations across all stages and partners.
- Design and build the multi-tenant backend API powering the portal: data isolation for partners, and an "Act As" pattern for Plug ops staff to work in partner context with a full audit trail.
- Own integrations with external systems - HubSpot, automotive apis, condition information and images, and transport carrier APIs - with durable write-back patterns and graceful degradation.
- Take ownership of features end-to-end, evaluating effort, risk, and priority in an agile environment with Plug ops and partner contacts as key stakeholders.
- Collaborate with colleagues and be a strong voice in product and architecture design sessions.
- Use agentic coding tools to write clear, efficient, and scalable code with an eye toward flexibility and maintainability.
- Own and contribute to team productivity and process improvements, including bringing mobile and B2B SaaS patterns to the broader team.
- Actively raise the technical bar through thoughtful code review, pairing, and knowledge sharing - including how you use AI tools.
Benefits
- Health, vision, and dental insurance
- Daily lunch stipend
- Eligibility for equity/stock options, based on role and performance
- Opportunities for growth and development
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
