Senior Software Engineer

Senior Backend Software Engineer At Hiya, we're making business calls more trusted, useful, and effective. Voice remains one of the most important ways businesses communicate with their customers, but the value of a call depends on trust. When customers do not recognize who is calling or why, important conversations are missed, customer relationships suffer, and business outcomes are harder to achieve. Hiya helps businesses create trusted calling experiences that benefit both sides of the conversation: enterprises can reach customers with confidence, and customers can answer with confidence. Our products support branded business calling, trusted caller identity, call performance insights, customer engagement, and voice security capabilities that help businesses strengthen relationships and improve outcomes. This role sits in a core business area for Hiya and is focused on helping SMB and enterprise customers succeed. About the Role 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. We're looking for engineers who get excited about greenfield architecture, who want to make early decisions that shape how a product scales, and who thrive when there's more whiteboard than runbook. 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. Our team builds the platform at the intersection of voice, telephony, and artificial intelligence. Our work spans both audio intelligence (e.g., deepfake detection, speaker verification) and conversational AI, focused on building resilient, scalable systems that integrate into operator networks and enable our platform to perform in real-time telephony integrations. What You'll Do 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 This is a hybrid role with 3 days per week in office in Seattle and some travel required on an as-needed basis What Success Looks Like 4+ years of professional experience as a backend or backend-leaning full-stack engineer Strong fundamentals in backend architecture, API design, and data-driven systems Experience working with cloud infrastructure and CI/CD pipelines Comfort with ambiguity—you know how to make good decisions without a playbook Interest in applied AI, voice technology, or telephony (direct experience a plus, not required) Excellent communication and self-organization skills What We're Looking For Required: 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 Preferred: 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) How We Work Hiya is not a passive environment. We expect people to take ownership, form opinions, and engage directly with hard problems. We work with a high degree of transparency and autonomy. Context is shared openly, and decisions are discussed, challenged, and then made. Once a call is made, we commit and move forward. You'll be expected to work through ambiguity, weigh tradeoffs, and take responsibility for results—while keeping a high bar for quality and customer trust. Every team member at Hiya is expected to live our core values: Serve, our customers and partners by holding a high bar for trust and quality Own, share in success and open up to failures Lead, listen, show up with a point of view but commit entirely once a decision has been made Improve, even if it means changing course or contradicting ourselves Do, rather than observe Our Interview Process At Hiya, our interview process is designed to evaluate candidates through real, experience-based work. We focus on understanding how you think, exercise judgment, use leverage (including AI), and collaborate, rather than how well you perform in traditional interviews. Process Overview Our standard interview process follows this sequence: Initial Screen: We confirm baseline alignment, role interest, relevant experience, and logistics. Hiring Manager (HM) Screen: We evaluate role fit, expectations, and execution readiness. Onsite Interview Loop: Each interviewer focuses on specific competencies, evaluating how you make decisions, navigate tradeoffs, and collaborate in real time Live Working Assignment You'll then participate in a live, role-relevant working session as part of an interview loop with multiple interviewers. This experience is designed to reflect how work is done at Hiya and focuses on your real-time problem-solving and collaboration skills. During the session, you'll work through a problem live and walk interviewers through your thinking as you go. Interviewers will explore how you structure problems, communicate your reasoning, respond to questions and feedback, and adapt your approach in the moment. Future Hiya Value Interview: An independent conversation focused on your long-term potential, judgment under ambiguity, and ability to create sustained value as scope and complexity increase. Reference Check: As a final step, we connect with 2–3 past supervisors to gain additional perspective on your experience and working style, and to further understand how you align with Hiya's values. Hiya Inc