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# Senior MERN Developer

- **Company:** The River Source Treatment Center - Casa Grande LLC
- **Location:** Strongsville, OH, United States (Remote available)
- **Experience:** Expert
- **Salary:** $110,000.0 - $135,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Microsoft Azure, C Sharp (Programming Language), Cloud Computing, Code Review, Dependency Injection, DevOps, Distributed Systems, MongoDB, Node.Js, OpenID, PCI Data Security Standards, Redis, Release Management, Software Engineering, Systems Integration, TypeScript, Web Applications, Data Logging, Mern, ReactJS, Large Language Models, Express.js, Grafana, Kubernetes, Sentry, React Redux, Restful APIs, Docker, Microservices
- **Published:** August 29, 2026
- **Apply:** https://www.careerjet.com/job/us1513144880c2ebb70e9e85ee61865402/eaa

## About the Role

* 7+ years of software development experience, with proven leadership on technical projects
 * Strong, current expertise with TypeScript, MongoDB, Express.js, React, and Node.js
 * Hands-on experience with dependency injection (InversifyJS or similar), Redis-backed job queues (BullMQ or similar), Cloud Tasks/Pub/Sub, Auth0/OIDC/JWT auth, and Zod
 * Modern React tooling - Redux Toolkit, React Hook Form/Formik, MUI or similar
 * Experience with GCP (Cloud Run, Cloud Functions, Cloud Tasks, Pub/Sub, Secret Manager), Docker, and Kubernetes
 * Experience building scalable APIs, microservices, and distributed systems
 * Strong communication and mentoring skills

Preferred

 * Experience as a Technical Lead, Lead Developer, or Project Lead
 * Experience with payments/card processing, PCI-DSS, or field-level encryption
 * Experience with ERP, financial systems, or expense management/AP/procurement applications
 * Feature flag release management experience
 * Experience integrating LLMs/generative AI into production apps
 * Familiarity with Azure/.NET/C# equivalents

## Description

* Design, build, and support scalable applications using MongoDB, Express.js, React, Node.js (TypeScript), APIs, and GCP
 * Develop web apps, microservices, integrations, and cloud-native solutions deployed via Cloud Run, Cloud Functions, and Kubernetes
 * Lead solution design, architecture decisions, and technical projects from design through deployment
 * Coordinate across developers, product, and stakeholders; facilitate architecture reviews and planning
 * Mentor developers through code reviews and knowledge sharing; promote engineering best practices
 * Partner with Product, QA, DevOps, and Architecture teams
 * Troubleshoot production issues using observability tools (Sentry, OpenTelemetry, structured logging)


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