---
title: 'Senior Backend Engineer (ML) at Tennr'
canonical: 'https://feeny.ai/job/senior-backend-engineer-ml-tennr-new-york-ewqcn4cv1vbh'
type: 'job'
last_seen: '2026-10-15'
---

# Senior Backend Engineer (ML) at Tennr

- **Company:** Tennr
- **Location:** New York, NY
- **Compensation:** $190k–$215k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-29
- **Last confirmed live:** 2026-10-15
- **Apply:** https://jobs.ashbyhq.com/tennr/ef59b5ca-8c20-47c0-b44a-2bea5eb5017a

## Job description

Company Description Today, when you go to your doctor and get referred to a specialist, your doctor sends out a referral and tells you, “They’ll be in touch soon.” So you wait. And wait. Sometimes days, weeks, or even months. Why? Because too often providers are overwhelmed with the painstakingly tedious work required to get paid by insurance companies. Powered by proprietary models, Tennr handles the complex paperwork that gets patients through the door and providers paid, helping operators get patients the right care, at the right time, in the right setting.

## Role Description

We’re looking for a high-agency Senior Backend Engineer to bridge the gap between cutting-edge ML research and real-world product delivery. You’ll design and build agentic workflows that power complex healthcare processes to solve hairy infrastructure, workflow, and UX challenges in U.S. healthcare. This role involves creating data pipelines, evaluation harnesses, and scalable production-grade agentic systems. You’ll be responsible for researching the right tools and models, ensuring we always use the best-fit technology for each workflow.. As part of our ML team, you’ll work hand-in-hand with researchers to translate new techniques and insights into production-ready systems. The ideal candidate has full-stack engineering experience, hands-on expertise with LLM APIs, and a proven track record of deploying AI systems into production. You’ll work across the stack - from data collection to training pipelines to AI agent orchestration to frontend integration - bringing cutting-edge AI solutions to life in real-world healthcare environments.

## Responsibilities

As a Senior Backend Engineer on the ML team at Tennr, you’ll bridge the gap between cutting-edge ML research and real-world product delivery. You’ll help build agentic systems that use LLMs, and vision models, and structured automation to solve hairy infrastructure, workflow, and UX challenges in U.S. healthcare.

- Ship full-stack AI systems end-to-end
- Design resilient systems for model deployment, evaluation, and monitoring that stay reliable as traffic grows.
- Go from ideation to code within hours; iterate quickly on experiments and data.
- Collaborate with ML engineers, backend engineers, and cross-functional teams to integrate models cleanly with data pipelines and product

## Qualifications

- Proficiency in full-stack development, with a strong understanding of system design, backend engineering, and observability infrastructure.
- A track record of working through the full lifecycle of building, testing, deploying, scaling, and monitoring LLM-centered software architectures.
- Excellent communication and collaboration skills: aligning on interfaces, navigating tradeoffs, and driving cross-team execution.

Why Tennr?

- Drive Impact: one of our company values is Cowboy, meaning you set the pace. You won’t just talk about things, you’ll get them done. And feel the impact.
- Develop Operational Expertise: learn the inner workings of scaling systems, tools, and infrastructure
- Innovate with Purpose: we’re not just doing this for fun (although we do have a lot of fun). At Tennr, you’ll join a high-caliber team maniacally focused on reducing patient delays across the U.S. healthcare system.
- Build Relationships: collaborate and connect with like-minded, driven individuals in our Chelsea office 4 days/week
- Free lunch! Plus a pantry full of snacks.

## Benefits

- Beautiful new office at 345 Hudson Street
- Unlimited PTO
- 100% paid employee health benefit options
- Employer-funded 401(k) match
- Competitive parental leave

## About Tennr

## Company Overview
- **One-liner**: Tennr is an agentic patient orchestration platform that automates complex healthcare workflows—from document intake and prior authorization to patient routing—to eliminate care delays and reduce denials.
- **Entity Type**: Private (Series C)
- **Headquarters**: New York, New York, United States
- **Founded**: 2021
- **Founders**: Not publicly available

## Core Business
- **Primary industry**: Healthcare IT / Healthcare Operations
- **Target customers**: B2B – healthcare providers (hospitals, health systems, independent practices, specialty clinics)
- **Mission / purpose**: “Eliminate patient care delays across the U.S. healthcare system” – [tennr.com](https://www.tennr.com/)

## Products & Services
- **Document Wrangling**: Automates classification, routing, and extraction of unstructured documents (referrals, clinical notes, insurance forms, letters of medical necessity) from fax, portal, or internal orders. – [tennr.com](https://www.tennr.com/)
- **Intelligent Insurance Decisioning**: Checks eligibility, investigates benefits, submits and tracks prior authorizations against payer criteria. – [tennr.com](https://www.tennr.com/)
- **Patient Flow Orchestration**: Real-time control tower showing stuck patients, prioritizes work, and automatically updates charts and orders to keep patients moving through care journeys. – [tennr.com](https://www.tennr.com/)
- **Care Coordination & Closing the Loop**: Automatically requests missing documentation from the right party and tracks it through completion. – [tennr.com](https://www.tennr.com/)

## Market Standing
- **Valuation**: Not disclosed
- **Total Funding**: $159.75 M (per [cbinsights.com](https://www.cbinsights.com/company/tennr)) / $161.3 M (per [linkedin.com](https://www.linkedin.com/company/tennrai)) – conflicting reports
- **Latest Round**: Series C ($101 M raised ~1 year ago) – [cbinsights.com](https://www.cbinsights.com/company/tennr)
- **Notable Investors**: Foundation Capital, Andreessen Horowitz, Lightspeed, Frank Slootman, Institutional Venture Partners, and 10 others – [cbinsights.com](https://www.cbinsights.com/company/tennr)
- **Growth Signals**:
  - Headcount grew 148.7% YoY to 239 employees (monthly growth +4.6%) – [linkedin.com](https://www.linkedin.com/company/tennrai)
  - Processed over 10 M patients in 2025 – [tennr.com/careers](https://www.tennr.com/careers)
  - Named to Cloud 100 Rising Stars 2024, CB Insights Digital Health 50 2024, and Top 40 Private Companies 2024 – [tennr.com/careers](https://www.tennr.com/careers)

## Competitive Advantages
- **Proprietary vision-language models** trained on the largest dataset of service-to-payer criteria mappings, enabling policy-grade decisioning at scale.
- **End-to-end automation** that handles the entire patient journey from intake through authorization and scheduling, reducing manual touch points and first-pass denials.
- **Real-time visibility** into operational bottlenecks across referrals, consults, diagnostics, and authorizations.

## Strategic Focus
- **Patient flow optimization**: Intelligently route patients to the right care setting while eliminating delays.
- **Denial prevention**: Automate payer criteria checks to slash first-pass denials.
- **Care coordination**: Close loops on missing documentation and automate follow-ups with patients, providers, and payers.
- **Scale**: Expand platform to handle millions of care pathways per month across national networks and independent providers.

## Why Work Here
- **Culture**: “Problem Obsessed,” “Confrontation” (face hard truths directly), “Courage,” “Conviction,” “Clarity,” and “Cowboy” (set the pace, do instead of talk) – [tennr.com/careers](https://www.tennr.com/careers)
- **Work model**: In-person culture (HQ in New York, NY)
- **Benefits**: Meaningful equity, competitive salary, 401k matching, unlimited PTO, free lunch (and a pantry with “a strangely wide array of puffed corn snacks”) – [tennr.com/careers](https://www.tennr.com/careers)
- **Engineering culture**: Fast-paced, data-driven, with proprietary AI/ML models; open roles include Backend Software Engineer, Staff Product Engineer, Staff Backend Software Engineer, and Product Manager – [jobs.ashbyhq.com](https://jobs.ashbyhq.com/tennr)
- **Recognition**: Listed as one of the “50 Most Promising Startups 2024” and other industry accolades – [tennr.com/careers](https://www.tennr.com/careers)

## Sources
1. [tennr.com](https://www.tennr.com/)
2. [tennr.com/careers](https://www.tennr.com/careers)
3. [cbinsights.com](https://www.cbinsights.com/company/tennr)
4. [linkedin.com](https://www.linkedin.com/company/tennrai)
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/tennr)

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