Senior Backend Engineer, Infrastructure

Ellipsis Health; United States; Remote; USD 175,000 - 250,000; Full time

Benefits offered by this job

401k matching

Health insurance

Vision insurance

Dental insurance

Flexible paid time off

Job summary

Ellipsis Health is seeking a senior backend engineer to expand and maintain our real-time voice pipeline, integrating ASR/TTS plugins and optimizing latency to under 500 ms. You will collaborate with ML, product, data engineering, and platform teams across cloud environments (AWS/GCP/Azure) to deliver scalable, observable services.

Ideal candidates have 4+ years building production Python back-ends, hands-on with streaming systems (WebRTC/WebSockets), and experience in PostgreSQL and Redis.

Qualifications

• 4+ years building production back-ends in Python.
• Real-time streaming systems experience (WebRTC, WebSockets).
• Concurrency, buffering, audio codecs knowledge (Opus, PCM).
• Cloud platforms (AWS/GCP/Azure) and container orchestration.
• Relational (PostgreSQL) and in-memory (Redis) data stores.

Responsibilities

• Expand and maintain real-time voice pipeline: design, implement, and
• Integrate new providers & transports: add plug-ins for ASR/TTS.
• Deliver ultra-low latency (<500 ms RTT): profile async pipelines (asyncio).
• Instrument & observe: emit traces (OpenTelemetry).
• Harden for production with retries and idempotent messaging.
• Collaborate with ML, product, data engineering, and other teams.

Skills

Python

Real-time streaming

Concurrency

Cloud platforms

PostgreSQL

Redis

Communication

OpenTelemetry

Education

B.S./M.S. in CS/EE

Tools

OpenTelemetry

Twilio

Telnyx

SIP

Job description

Ellipsis Health is developing cutting-edge AI/ML products to address healthcare staffing issues and administrative burdens. The platform employs conversational AI and patented vocal biomarker technology to deliver improved healthcare experiences for clients and patients. The team is headquartered in Silicon Valley and is funded and supported by preeminent venture capital groups and healthcare institutions.

Responsibilities:

• Expand and maintain our real-time voice pipeline: design, implement, and

• Integrate new providers & transports: add plug-ins for emerging ASR, TTS,

• Deliver ultra-low latency (<500 ms round-trip): profile async pipelines (asyncio,

• Instrument & observe every hop: emit structured traces (OpenTelemetry),

• Harden for production: implement graceful retries, idempotent message

• Collaborate cross-functionally with ML, product, data engineering, and

Qualifications:

• 4+ years building production back-ends in modern Python.

• Proven experience with real-time streaming systems—WebRTC, WebSockets,

• Deep understanding of concurrency, buffering, audio codecs (Opus, PCM), and

• Solid understanding of AWS/GCP/Azure, including container orchestration

• Solid grasp of relational (PostgreSQL) and in-memory (Redis) data stores; able

• Excellent communication skills and a bias for measured, observable, and

• B.S./M.S. in CS, EE, or related fields.

• Familiarity with voice-agent frameworks,

• Hands-on with telephony (Twilio, Telnyx), SIP, or PSTN integrations.

• Experience integrating multimodal inputs (vision, text chat) into voice agents.

• Familiarity with GPU inference and streaming pipelines.

• Prior work in regulated industries (healthcare, finance) and comfort preparing for

• SOC 2 / HIPAA audits.

Salary and Benefits

• We offer competitive salary and benefits, including 401k matching up to a certain percentage of your salary, health, vision, and dental insurance, and very flexible paid time off.
• The typical salary range for this role is $175,000 to $250,000 USD.
• The amount offered will be determined by a variety of factors including but not necessarily limited to your individual skills, qualifications, and past experience relative to the requirements of the role.

Background Checks

As a health technology company, we reserve the right to run a background check on any applicant to which we extend an offer and to re-perform any such check at any time during the course of employment. Please know that there is no set policy on rejecting candidates because of certain background check results, and that we look at a candidate as a whole before making any decisions. We comply with all “ban the box” laws in applicable jurisdictions.

Assistance

If you have a disability or otherwise require any assistance whatsoever in the application or recruitment process, please feel free to submit a request to [e-mail].