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Senior Frontend Engineer

Tennr

New York City, New York, USA permanent

Posted: March 31, 2026

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Quick Summary

Senior Frontend Engineer with expertise in building scalable and maintainable front-end applications. Proficient in React, JavaScript, and HTML/CSS, with experience in working with popular frameworks and libraries such as Redux and React Router. Strong understanding of web architecture and design principles.

Job Description

Company Description

Today, when you go to your doctor and get referred to a specialist (e.g., for sleep apnea), 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 specialists and medical services are overwhelmed with referrals and the painstakingly manual process it takes to qualify your referral prevents them from getting around to it on time, or sometimes at all. Tennr prevents these delays and denials by making sure every referral gets where it needs to go, with the right info, at the right time. Powered by RaeLM™ Tennr reads, extracts, and acts on every piece of patient information so providers can capture more referrals, slash denials, and reduce delays.

Responsibilities

• Work closely with Product and Design Leaders to build performant and beautiful experiences for our users

• Empathize with multiple user personas (including back office admins, referring healthcare providers, and even patients in the near future) to channel their perspectives into building product surfaces

• Drive architecture decisions for our complex React app

• Take ownership over visual quality — whether executing pixel-perfect designs with precision or leveraging strong design intuition to navigate and resolve ambiguity

• Embrace a founder's mindset, proactively driving projects from conception to completion, and contributing significantly to our company's growth and success

Candidate Qualifications

• 5+ years of experience in UI/UX engineering, front-end development, or full-stack development, with a strong focus on JavaScript and familiarity with React and TypeScript.

• Strong knowledge of front-end performance optimizations and accessibility principles.

• Proven track record of building and maintaining scalable web applications.

• Passion for great design and user experience.

• Excellent problem-solving skills and a knack for efficient, clean coding practices.

• Experience utilizing AI tools for prototyping, efficiency, etc. 

• Outstanding communication skills, capable of articulating complex technical concepts to a diverse audience.

• A team player who thrives in collaborative environments and values diverse perspectives.

• Prior experience in a startup or fast-paced tech environment is a plus.

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 (preferred)

• Free lunch! Plus a pantry full of snacks.

Benefits

• Chelsea office

• Unlimited PTO

• 100% paid employee health benefit options

• Employer-funded 401(k) match

• Competitive parental leave

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