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# Senior Full-Stack Engineer

- **Company:** Simulations Plus
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $90,000.0 - $110,000.0
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Software as a Service, Cloud Computing, Code Review, Cursor, JSON, MongoDB, Node.Js, NoSQL, OAuth, OpenID, Software Engineering, Data Streaming, TypeScript, Tailwind, ReactJS, Large Language Models, Multi-Agent Systems, Backend, Information Technology, Front End Software Development, Restful APIs, GXP
- **Published:** September 2, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=bb4d1ade33ae3b32

## About the Role

* 3+ years of professional software engineering experience, with shipped full-stack work in production
 * Proficiency in JavaScript or TypeScript across Node.js backend and React frontend
 * Practical experience with document or NoSQL databases such as MongoDB
 * Comfort building and consuming REST APIs and JSON contracts
 * Genuine interest in agents, MCP, and applied AI, and the drive to build real expertise in those areas
 * Fluency using AI coding tools (Claude, Cursor, Copilot) in daily workflow, * Familiarity with Anthropic, OpenAI, or other LLM provider SDKs
 * Exposure to MCP, agent frameworks, or LLM-integrated product features
 * Experience with cloud infrastructure (AWS preferred) and CI/CD pipelines
 * Experience in regulated-software environments (SOC 2, HIPAA, GxP, 21 CFR Part 11) or life-sciences SaaS
 * Familiarity with Passport, OAuth, OIDC, or comparable auth patterns

Education:

 * Bachelor's degree in computer science, engineering, or related field preferred
 * Relevant technical certifications welcomed

## Description

* Feature Delivery Across the Stack
 + Own features end-to-end across Node.js and Express backends and React/Tailwind frontends
 + Build the APIs, UI, and data flows behind real customer-facing functionality
 + Contribute to the data, auth, and service patterns the platform builds on
 * AI Feature Integration
 + Integrate LLM-powered functionality into product surfaces, working alongside the team's AI lead
 + Wire frontends to LLM and MCP endpoints; handle streaming, errors, and degraded states gracefully
 + Contribute to evals, fixtures, and tooling that support the AI side of the team
 * Team Impact
 + Bring full-stack range to a team that values flexibility across backend, frontend, and AI
 + Contribute to code reviews, documentation, and the team's shared engineering practices
 + Apply AI coding tools effectively as part of daily engineering workflow
 * Other Duties as Assigned