Senior Software Engineer

About HiyaAt Hiya, we're making calls safe, useful, and human again. Voice is the most human form of communication, yet it's become one of the least trusted. Spam, scams, and AI manipulation have eroded what was once a simple way to connect. Each month our AI voice technology analyzes 28+ billion calls, protecting over 550 million users and 800+ businesses worldwide. Partnering with a growing global network including AT&T, Samsung, British Telecom EE, Rogers, MasOrange, Bell Canada, MasMovil, and Virgin Media O2, we're not just stopping bad actors, we're helping people feel good and confident about picking up the phone again. This is a pivotal moment for voice. As new threats and technologies accelerate, so does demand for trusted voice communication. Hiya is growing 40%+ year over year, expanding globally, and defining what voice becomes next. Join us. You won't just work on what voice is today, you'll shape what it becomes tomorrow: smarter, safer, and genuinely worth answering again.About the RoleThe Communications Platform team builds and operates the infrastructure layer that powers Hiya's consumer products — Hiya AI Phone and Hiya Spam Blocker — as well as the carrier partnership integrations that are central to Hiya's growth. We own the voice platform, mobile SDKs, and the tooling that validates our intelligence platform works correctly across carrier networks worldwide. This is a role for someone who gets energy from variety and impact. You'll work across the full width of the platform — backend services, mobile SDKs, AI pipelines, DevOps — rather than going deep on one narrow problem. You're strong in at least one language and comfortable picking up others. You move fast, ship reliably, and communicate clearly when something needs attention. The growth path here is real. You'll start with well-scoped work where you can prove your judgment and build context quickly. As you do, you'll take on broader ownership — shaping what gets built, not just how — and grow toward a senior engineering role on a team where that progression is expected, not exceptional.What You'll DoOwn voice platform backend services that make Hiya's voice intelligence work at scale — handling real-time call flows, carrier integrations, and VoIP infrastructure, with increasing exposure to AI-powered pipelines (STT, TTS, LLM) that drive our AI agents, consumer products, and carrier dealsBuild and evolve testing and validation tooling that gives Hiya confidence before a single real call is made in a new market — simulating calls, gathering results across real devices globally, and enabling the team to expand into new carrier networks without guessworkDrive delivery on Android and iOS SDK improvements that keep our platform connected to products and partners — shipping features, improving call quality metrics, and building the reliability that partners depend onOperate across the full stack with increasing autonomy — starting with well-scoped execution work and growing into end-to-end ownership of systems, features, and decisions as you build context and demonstrate judgmentWhat Success Looks LikeThe voice platform is reliable, performant, and world-class — powering AI agents, consumer products, and carrier integrations with call quality that users and partners can depend onNew market launches go live cleanly, with validation tooling that gives the team confidence before a single real call is madeSDK partners can ship the features they need without waiting months for supportYou've built enough context across the stack that you can independently identify problems, propose solutions, and drive them to completion — early on that means executing well-scoped work with quality and reliability; over time it means shaping what gets built, owning areas end to end, and operating at the level of a senior engineerWhat We're Looking ForRequired:3+ years of professional software engineering experienceStrong depth in TypeScript or Python; demonstrated ability to work meaningfully in other languagesExperience 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 changesStrong written and verbal communication — you write clear tickets, clear PRs, and proactively flag blockers rather than going quietPragmatic judgment — you make sensible tradeoffs between speed and perfection and can explain whyAutonomous on well-scoped work — once you understand the goal, you drive to completion without needing hand-holdingHonest about what you don't know — you ask good questions early rather than disappearing and surfacing problems lateReliable throughput — you ship consistently and follow through on commitmentsActive 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 workPreferred:Experience with VoIP or telephony (SIP, RTP, WebRTC) or interest in learning itCarrier or B2B platform contextExperience with Databricks, Kafka, or streaming data pipelinesFamiliarity with AWS (DynamoDB, S3, Kinesis, EKS)How We WorkHiya 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 qualityOwn, share in success and open up to failuresLead, listen, show up with a point of view but commit entirely once a decision has been madeImprove, even if it means changing course or contradicting ourselvesDo, rather than observeOur Interview ProcessAt 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 OverviewOur 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 H