Senior Full-Stack Engineer — AI Web & API (Remote)

Immunetrics

United States

On-site

USD 90,000 - 110,000

Full time

14 days+

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Benefits offered by this job

Fully remote work

Flexible schedules

Generous vacation policy

Annual bonus

Job summary

Simulations Plus is seeking a Senior Full-Stack Engineer to join a small department whose charter spans both web/SaaS and AI/agents products. The role will ship features across the full stack — backend, frontend, and LLM-integrated surfaces — wherever the team's most pressing implementation work lands in a given cycle.

It's a high-variety role for an engineer who wants to build real depth across web platform and applied-AI engineering.

Qualifications

3+ years of professional software engineering experience with shipped full-stack work in production.
Practical experience with 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.

Responsibilities

Feature Delivery Across the Stack: Own features end-to-end across Node.js/Express backends and React/Tailwind frontends.
AI Feature Integration: Integrate LLM-powered functionality into product surfaces alongside the AI lead.
Team Impact: Contribute to code reviews, documentation, and shared engineering practices.
Other Duties as Assigned.