Software Development Engineer

Hiya Inc. is a company focused on making calls safe and useful through innovative AI voice technology. The Software Development Engineer will be responsible for building and maintaining backend services and mobile integrations for Hiya's consumer applications, ensuring high performance and reliability.

Responsibilities:

• Own backend services that power core features across both apps—caller ID lookups, spam/fraud detection, call screening, real-time scam alerts, call transcription, and AI-generated summaries. This includes designing service architecture, writing production code, deploying to AWS, and operating systems at scale with high availability and low latency
• Build and maintain mobile integrations that connect backend services to iOS and Android applications. You'll collaborate closely with mobile engineers to ensure seamless SDK behavior across platforms, debug platform-specific issues, and ship features that work reliably for millions of users
• Scale infrastructure to support growing user bases and new feature development. You'll make decisions about how to handle increasing load, optimize costs, and maintain reliability as both products evolve
• Make architectural and implementation decisions that balance speed, quality, and long-term maintainability. You'll encounter ambiguous problems—how to handle edge cases in call screening logic, how to structure services for rapid iteration on AI features, how to maintain a shared backend that serves two distinct products—and you'll drive toward solutions with ownership of the outcome
• Collaborate across engineering, product, and design to ship features that matter. The Mobile Experience team operates with high autonomy, which means you'll be involved in shaping what we build, not just how we build it

Requirements:

• Experience shipping Node.js services in production environments
• Strong knowledge of AWS infrastructure and services (deployment, scaling, monitoring)
• Experience building backend systems that serve mobile applications
• Familiarity with iOS and/or Android development—enough to collaborate effectively on SDK integration and debug platform-specific issues
• Ability to design and operate services with high availability and low latency requirements
• Clear communication and the ability to work effectively with distributed teams (Seattle and London)
• Familiarity with AI-assisted development techniques and workflows
• Experience with telephony, VoIP, or voice-related systems (SIP, SS7, or similar protocols)