Senior Software Engineer II -Ruby

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

Job summary

Elsevier is expanding Wellsheet into a new clinical AI experience and is seeking engineers to own end-to-end agent features from backend to UI. You will work closely with a senior platform team to ship AI-driven clinical tools that clinicians use at the bedside across Epic, Cerner, and Athena.

You will contribute from day one to design, implement, and evaluate features, with a focus on measurable outcomes and robust tooling.

Qualifications

• Proficiency in TypeScript and Ruby; able to treat prompts and models as components in a system you own.
• End-to-end ownership from backend to UI with clean integration seams.
• Ability to measure impact with evaluation and metrics.

Responsibilities

• Own agent-powered features end to end: prompt and orchestration logic, backend plumbing, UI integration.
• Refine features through design, implementation and measured rollout.
• Build and extend evaluation coverage for shipped features; ensure measurable outcomes.
• Develop new presentation methods for agent outputs, including interactive views and richer in-chat results.
• Improve the synthetic data simulator and tooling around it.
• Collaborate with Product to land agent features in the clinical experience and own an agent surface.

Skills

TypeScript

Ruby

End-to-end ownership

Job description

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. 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. USA Job Seekers: EEO Know Your Rights.

Elsevier is a global leader in advanced information and decision support for science and healthcare. We believe that by working together with the communities we serve, we can shape human progress to go further, happen faster, and benefit all. We support continuous discovery and uphold the highest standards of content integrity, reliability, and reproducibility so the communities we serve can advance their field of science, healthcare or innovation with confidence. By combining high-quality content with powerful analytics, we transform complexity into clarity and deliver mission-critical insights that help professionals make better decisions when it matters most. We deliver insights that help research institutions, governments, and funders achieve their goals. We help researchers discover and share knowledge, collaborate, and accelerate innovation. We help librarians provide verified, quality information to universities. We help innovators turn knowledge into new products. We help health professionals improve patient care and educators train the next generation of doctors and nurses. Connecting quality content and innovative technologies, we make progress go further and happen faster. And by championing inclusion and sustainability, we ensure progress benefits all. With 9,500 employees, over 2,300 technologists in 5 major tech hubs, and more than 60 locations across the globe, we are committed to supporting the scientific and healthcare communities around the world. We offer a diverse range of opportunities across technology, commercial, business, and early career jobs. If you are looking for a career that inspires progress in science, innovation and health, and allows you to grow every day, find your team at Elsevier. Elsevier is part of RELX Group. Let’s shape progress together. Join us. elsevier.com/about/careers