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# Full Stack Engineer

- **Company:** EXPERT RECRUITING SOLUTIONS, LLC
- **Location:** Kearny, NJ, United States
- **Experience:** Experienced
- **Salary:** $114,400.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Data Analysis, Software Applications, Automation of Tests, Software as a Service, Design of User Interfaces, Human-Computer Interaction, Python (Programming Language), PostgreSQL, MongoDB, Working Model 2D, ReactJS, Fastapi, Pytest, Integration Tests, Information Technology, Playwright
- **Published:** October 27, 2026
- **Apply:** https://www.careerbuilder.com/job-details/full-stack-engineer-arlington-nj--344c9137-78ca-43ea-8fd8-45f48dd3f869

## About the Role

Testing, Healthcare Providers, Artificial Intelligence (AI), User Interface/Experience (UI/UX), PostgreSQL, MongoDB, Test Automation, Application Programming Interface (API), Product/Service Launch, Product Testing, * 4-7 years full-stack engineering on production SaaS.

TECHNOLOGY/SOFTWARE KNOWLEDGE

 * Strong on the modern stack: React and Python/FastAPI with PostgreSQL; MongoDB a plus.
 * Genuine test-engineering depth: pytest, Playwright, API and integration testing, and test design - not incidental coverage. This is a stated, weighted requirement for this role.
 * Fluency in AI-assisted development required: experience launching a net-new SaaS product and life-sciences exposure both preferred., * Exerting up to 10 pounds of force occasionally and/or negligible amount of force frequently or constantly to lift, carry, push, pull or otherwise move objects, including the human body.
 * The individual is required to have close visual acuity to perform an activity such as preparing and analyzing data and figures; transcribing; viewing a computer screen and extensive reading.
 * The individual in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
 * The individual must be able to remain in a stationary position 70% of the time., Bachelor of Science - Computer Science

## Description

Looking for a mid to senior level person, level II-III in a contract capacity that would be approximately 6 months long to help build and test capacity., EngagePro is MedPro's Healthcare Provider (HCP) engagement platform - a net-new, AI-first product built out of MedPro Labs and is now hardening toward a production launch. This role adds dedicated build capacity to accelerate that launch, with test engineering as an equal half of the mandate., * Deliver features end-to-end on EngagePro's modern, AI-first stack: Reacj front end, FastAPI services, PostgreSQL and MongoDB persistence.

 * Build the automated test foundation for launching product - unit, API, integration, and end-to-end coverage that lets the team ship quickly and safely.
 * Contribute to AI-in-product integration patterns as a core part of EngagePro's value., * This role is explicitly hybrid: a functional full-stack engineer who is also a strong test engineer.
 * You write the feature and the automated coverage that proves it.
 * On a launching product, test quality is what makes velocity safe.

Working Model (Contract):

 * Per MedPro's support model, contractors do not hold production access. Deployments and production operations pair through the full-time pod lead; your job is to make that pairing cheap - clean pipelines, feature flags, strong observability, and changes that are safe to ship.
 * AI-assisted development is the standard working mode.
 * A focused 6-month engagement aligned to the launch window, with extension evaluated against launch progress.