Senior Software Engineer II -Ruby

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

Benefits offered by this job

Annual incentive bonus

Job summary

RELX INC via Wellsheet at Elsevier is hiring a Senior Software Engineer for AI Agents. You will own agent features across backend, prompt orchestration, and the UI, shipping production-ready experiences used by clinicians in real-time.

You’ll design, implement, and measure new capabilities, improving eval coverage and delivering richer in-chat results and interactive views. Expect ambiguity and a fast-paced, senior engineering culture.

Qualifications

• Proficiency in TypeScript and Ruby with strong software development experience.
• End-to-end ownership from backend to UI and clean interface seams.
• Ability to measure outcomes with lightweight evals over flashy demos.
• Comfort with ambiguity and evolving playbooks in AI-driven work.
• AI-assisted development and coding agents are part of the workflow.

Responsibilities

• Own agent-powered features end to end, including prompt orchestration and UI integration.
• Turn loosely defined ideas into designed, implemented, and measured features.
• Develop and expand evaluation coverage for shipped features.
• Create new ways for agents to present results, including interactive views.
• Improve the synthetic data simulator and related tooling.
• Collaborate across squads with Product to land features in clinical experiences.
• Co-own an agent surface end-to-end within months, with measurable impact.

Skills

TypeScript

Ruby

AI agent development

End-to-end ownership

Prompt engineering

Job description

Philadelphia, PA

Pennsylvania

New York

Full time

R116810

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 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.

RELX is a global provider of information-based analytics and decision tools for professional and business customers, enabling them to make better decisions, get better results and be more productive.

Our purpose is to benefit society by developing products that help researchers advance scientific knowledge; doctors and nurses improve the lives of patients; lawyers promote the rule of law and achieve justice and fair results for their clients; businesses and governments prevent fraud; consumers access financial services and get fair prices on insurance; and customers learn about markets and complete transactions.

Our purpose guides our actions beyond the products that we develop. It defines us as a company. Every day across RELX our employees are inspired to undertake initiatives that make unique contributions to society and the communities in which we operate.