Job Description
XCaliber is the operating platform for healthcare and health tech organisations, enabling real-time decision-making and autonomous workflows.
Our platform powers healthcare-specific copilots through three core products: an Interoperability Gateway (out-of-the-box access to Epic, athena, Elation, eCW, and more), a Healthcare Data Fabric for clean, connected data, and Agentic Workflows for automation at scale.
The result: faster integrations, lower costs, and improved patient care.
We are looking for a highly motivated Software Engineer who thrives in a startup culture, is a self-learner, demonstrates a strong sense of ownership, and communicates effectively across technical and non-technical teams. You will play a critical role in building and scaling voice, SMS, and omnichannel communication capabilities that power real-time patient engagement and agentic workflows within our platform.
What You Will Work On
Telephony Integration & Development :
- Design, build, and maintain integrations with telephony providers such as Twilio, RingCentral, Vonage, and Bandwidth to support voice calls, SMS, and IVR workflows.
- Develop programmable voice solutions including call routing, call recording, transcription pipelines, and real-time audio streaming.
- Build SMS and omnichannel messaging flows for patient outreach, appointment reminders, and clinical notifications.
Agentic Workflow Integration
- Integrate telephony capabilities into XCaliber's agentic workflow engine to enable AI-driven call handling, automated patient interactions, and event-driven communication triggers.
- Collaborate with AI/ML teams to embed real-time speech-to-text, NLP, and intent detection into live voice pipelines.
Reliability, Scalability & Observability
- Ensure high availability and low-latency performance for real-time communication services in a multi-tenant SaaS environment.
- Implement observability hooks, alerting, and dashboards to monitor call quality, delivery rates, and provider-level SLAs.
- Design retry strategies, failover mechanisms, and provider fallback logic to ensure resilient communication pipelines.
Architecture & Best Practices
- Contribute to the design of a provider-agnostic telephony abstraction layer to support pluggable integrations across Twilio, RingCentral, and other CPaaS platforms.
- Enforce compliance with HIPAA and healthcare data privacy standards across all communication channels, including call recordings and message content.
Collaboration & Mentorship
- Partner with product managers, clinical teams, and platform engineers to translate communication requirements into robust technical solutions.
- Mentor junior engineers in telephony architecture, API design, and real-time systems development.
What We Are Looking For
- Hands-on experience with CPaaS platforms such as Twilio, RingCentral, Vonage, Bandwidth, or similar, including their REST APIs, SDKs, and webhooks.
- Strong proficiency in Node.js and Python for building backend communication services and API integrations.
- Experience designing and implementing IVR flows, call routing logic, programmatic SMS, and WebRTC-based voice solutions.
- Solid understanding of real-time communication protocols such as REST, Websockets, SIP, WebRTC, and VoIP fundamentals.
- Experience with event-driven architectures, Kafka or similar message queues, and microservices for asynchronous communication workflows.
- Familiarity with Docker, Kubernetes, and cloud-native deployment on AWS, GCP, or Azure.
- Awareness of HIPAA compliance requirements and security best practices for handling sensitive communication data, including encryption and audit logging.
- Self-driven, eager to learn, adaptable to changing priorities, and capable of delivering in a fast-paced startup environment.
- Strong verbal and written communication skills across technical and non-technical audiences.
Preferred Qualifications
- Prior experience in healthcare, telehealth, or other regulated industries where communication reliability and data privacy are critical.
- Experience integrating real-time speech-to-text services (e.g., Google Speech-to-Text, AWS Transcribe, AssemblyAI) into voice pipelines.
- Familiarity with AI-driven conversational platforms, virtual agents, or LLM-powered call automation.
- Background in multi-tenant SaaS environments with per-tenant communication configuration and isolation.
- Exposure to contact center platforms or workforce engagement tools (e.g., Five9, Genesys, Amazon Connect).
(ref:hirist.tech)
