Senior Software Engineer

At Hiya, we're making business calls more trusted, useful, and effective. This role is part of a foundational team working at the intersection of backend systems, real-time voice infrastructure, and applied AI. You won't be maintaining legacy code or tweaking existing services—you'll be designing and building the backend platform from the ground up. As a Senior Backend Software Engineer, you'll design and build the backend services and APIs that power Hiya's next-generation voice products. This is a backend-first role with opportunities to work across the stack when it adds value. This role sits in a core business area for Hiya and is focused on helping SMB and enterprise customers succeed.

Responsibilities

Design and build backend services and APIs from scratch using TypeScript / Node.js; Build real-time voice systems: SIP/RTP media handling and STT/TTS pipelines with strict latency requirements; Make foundational architecture decisions that will shape the platform for years to come; Build systems that operate in real-time, high-availability voice environments; Work with data stores and event streams, and manage deployments using Docker and Kubernetes (AWS); Collaborate with a distributed team (Seattle and Europe) with async-first norms

Requirements

3+ years of professional software engineering experience; Strong depth in TypeScript or Python; demonstrated ability to work meaningfully in other languages; Experience with Node.js backend development and modern web service patterns (REST APIs, async processing, event-driven systems); Familiarity with DevOps basics: containers (Docker), deployment workflows, and reading infrastructure configs (Terraform, Helm, or similar); Ability to work across Android or iOS code — you don't need to be a mobile specialist, but you can navigate a Kotlin or Swift codebase and make focused changes; Strong written and verbal communication — you write clear tickets, clear PRs, and proactively flag blockers rather than going quiet; Pragmatic judgment — you make sensible tradeoffs between speed and perfection and can explain why; Autonomous on well-scoped work — once you understand the goal, you drive to completion without needing hand-holding; Honest about what you don't know — you ask good questions early rather than disappearing and surfacing problems late; Reliable throughput — you ship consistently and follow through on commitments; Active use of AI tooling — you leverage AI-assisted coding as a force multiplier and have a point of view on where it creates real leverage in this kind of work

Nice to have

Experience with VoIP or telephony (SIP, RTP, WebRTC) or interest in learning it; Carrier or B2B platform context; Experience with Databricks, Kafka, or streaming data pipelines; Familiarity with AWS (DynamoDB, S3, Kinesis, EKS); Direct experience in applied AI, voice technology, or telephony (a plus, not required)

Benefits

Employer-sponsored Insurance; Medical, dental, and vision (PPO & HDHP); 50% dependent coverage; Health, flexible spending, and dependent care accounts; Life, AD&D, and accident coverage, with company-paid life and long-term disability; 401(k) with 3% company match (via Fidelity); Flexible vacation policy and paid company holidays; Paid parental leave; Work-from-home equipment stipend; $1,000 annually to invest in learning and growth; $1,000/year in charitable donation matching; Team lunch 2x per week; Equity compensation