Senior Software Engineer II - Ruby (AI Agents)

Elsevier; Philadelphia (Philadelphia County); On-site; USD 95,000 - 159,000; Full time

Job summary

Wellsheet at Elsevier is seeking a Senior Software Engineer to own agent-powered features end to end, from prompt design to UI delivery, in a platform that integrates with Epic, Cerner, and Athena. You’ll work on real-time EHR sync and AI-assisted clinical context used at the point of care.

Join a small, senior engineering team within Elsevier's Clinical Solutions group, shipping a production AI experience to hospital clients in 2027, with opportunities to shape the platform API and eval

Qualifications

• Proficient in TypeScript and Ruby; treat prompts and models as system components.
• End-to-end ownership from backend to UI with the judgment to keep the seams clean.
• Instinct to measure: prefer small honest eval over big demos.
• Comfort with ambiguity; no established playbook yet.
• AI-assisted development as a default; coding agents and spec-driven development are standard.

Responsibilities

• Own agent-powered features end to end: prompt and orchestration logic, backend plumbing, and the UI where the output lands.
• Take loosely specified feature ideas through design, implementation, and measured rollout.
• Build and extend eval coverage for the features you ship; nothing ships unmeasured.
• Build new ways for agents to present their work, from richer in-chat results to interactive views.
• Improve the synthetic data simulator and the tooling around it.
• Work across squad boundaries with Product to land agent features in the clinical experience.
• Pair with the engineer leading our agent work, ship an improvement to a production agent feature end to end, and add the eval coverage that proves it.

Skills

End-to-end ownership

Ambiguity tolerance

AI-assisted development

Tools

TypeScript

Ruby

Job description

Senior Software Engineer AI Agents · Wellsheet at Elsevier

About Wellsheet at Elsevier:

Wellsheet is a clinical decision support platform used by more than 20,000 providers across 100+ hospitals. We embed directly in the EHR (Epic, Cerner, Athena) and put AI-generated clinical context in front of clinicians at the bedside. In 2026 Wellsheet became part of Elsevier's Clinical Solutions group, and we're now building the next generation of our product: a new clinical AI experience shipping to our first hospital clients in early 2027, backed by an integration platform we've run in production for years. We're a small, all-senior engineering team. You'll own real surface area from your first weeks, work directly with the people who built the system, and ship software that clinicians use during patient care. No healthcare background is required. We train the clinical and interoperability domain; we hire for engineering judgment.

About the team

The Platform squad runs the machinery underneath everything clinicians see: real-time EHR sync across Epic, Cerner, and Athena, FHIR ingestion for 100+ hospitals, and vocabulary normalization across 125+ clinical terminologies. The squad is led directly by the technical leader behind Wellsheet's platform. Its next major build, which you'll help kick off, is platform API that other Elsevier clinical products and internal teams will consume. The squad also owns the internal tooling for managing the platform and the health of the stack itself, from framework upgrades to developer tooling.

Responsibilities

• Owning agent-powered features end to end: prompt and orchestration logic, backend plumbing, and the UI where the output lands.


• Taking loosely specified feature ideas (\"clinicians want the chart review agent to explain itself\") through design, implementation, and measured rollout.


• Building and extending eval coverage for the features you ship; nothing ships unmeasured.


• Building new ways for agents to present their work, from richer in-chat results to interactive views.


• Improving the synthetic data simulator and the tooling around it.


• Work across squad boundaries with Product to land agent features in the clinical experience.


• Pairing with the engineer leading our agent work, ship an improvement to a production agent feature end to end, and add the eval coverage that proves it. By month three you'll own an agent surface outright.

Requirements

• Possess current Software Engineering development skills with TypeScript and Ruby experience; you treat prompts and models as components in a system you're responsible for.


• End-to-end ownership from backend to UI, with the judgment to keep the seams clean.


• Instinct to measure: you'd rather have a small honest eval than a big impressive demo.


• Comfort with ambiguity; much of this work has no established playbook yet.


• AI-assisted development as a default: coding agents and spec-driven development are already part of how you work.

Elsevier is a renowned global information analytics company that primarily focuses on providing scientific, technical, and medical (STM) research content, tools, and services. It is one of the largest publishers of academic journals and scholarly literature in the world.

Elsevier operates in various domains, including science, technology, medicine, social sciences, and more. They publish a vast number of peer-reviewed journals covering a wide range of disciplines. These journals act as platforms for researchers and academics to share their findings and contribute to the advancement of knowledge in their respective fields.

U.S. National Base Pay Range: $95,300 - $158,800.

Geographic differentials may apply in some locations to better reflect local market rates.

If performed in New York, the base pay range is $104,800 - $174,700. If performed in New York City, the base pay range is $114,300 - $190,500. If performed in Rochester, NY, the base pay range is $95,300 - $158,800.

This job is eligible for an annual incentive bonus.

We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.