Sr Applications Developer MERN

Foundation Software•Strongsville, OH

About The Position

Foundation Software is seeking a Senior Application Developer who combines strong hands-on engineering skills with technical leadership, project ownership, and a passion for building modern cloud-native applications. This role focuses on the TypeScript-based MERN stack and Google Cloud Platform (GCP) while helping evolve our broader technology ecosystem. The developer will design, build, and support scalable applications using MongoDB, Express.js, React, Node.js (TypeScript), APIs, and GCP. They will develop modern web applications, microservices, integrations, and cloud-native solutions deployed via containers to Google Cloud Run, Cloud Functions, and Kubernetes. The role also involves leading solution design, contributing to architecture decisions, and driving modernization initiatives to improve scalability, reliability, security, and maintainability.

Requirements

7+ years of software development experience.
Proven experience leading software projects and influencing technical direction.
Strong, current expertise with TypeScript
Strong expertise with: MongoDB (native Node.js driver; Mongoose a plus), Express.js, React, Node.js
Hands-on experience with: Dependency injection / IoC containers (InversifyJS or similar)
Hands-on experience with: Redis-backed job queues (BullMQ or similar) and Google Cloud Tasks / Pub/Sub
Hands-on experience with: Auth0 / OIDC / JWT-based authentication
Hands-on experience with: Schema validation with Zod
Hands-on experience with: Modern React tooling - Redux Toolkit, React Hook Form/Formik, and Material UI (MUI) or similar.
Experience developing and deploying solutions in Google Cloud Platform (GCP), including Cloud Run, Cloud Functions, Cloud Tasks, Pub/Sub, and Secret Manager.
Experience with Docker and Kubernetes for containerized service deployment.
Experience building scalable web applications, APIs, microservices, and distributed systems.
Experience mentoring developers and leading technical discussions.
Strong communication, collaboration, and problem-solving skills.

Nice To Haves

Experience as a Technical Lead, Lead Developer, or Project Lead.
Experience with payments/card processing, PCI-DSS, or client-side field-level encryption.
Experience with construction software, ERP systems, financial systems, or expense management solutions.
Experience building or integrating expense management, AP, invoice processing, procurement, or purchasing applications.
Experience with feature flag release management
Experience integrating LLMs / generative AI into production applications.
Familiarity with equivalent technologies on the Azure / .NET / C# stack.

Responsibilities

Design, build, and support scalable applications using MongoDB, Express.js, React, Node.js (TypeScript), APIs, and GCP.
Develop modern web applications, microservices, integrations, and cloud-native solutions deployed via containers to Google Cloud Run, Cloud Functions, and Kubernetes.
Lead solution design and contribute to architecture decisions.
Drive modernization initiatives that improve scalability, reliability, security, and maintainability.
Lead technical projects from design through deployment.
Coordinate work across developers, product teams, and stakeholders.
Facilitate architecture reviews, planning sessions, and technical decision-making.
Identify and resolve technical risks, dependencies, and delivery challenges.
Mentor developers through code reviews, coaching, and knowledge sharing.
Promote engineering best practices including clean architecture, dependency injection, testing, performance, and code quality.
Partner closely with Product, QA, DevOps, Architecture, and business teams.
Troubleshoot complex production issues using the observability stack (Sentry, OpenTelemetry, structured logging) and drive continuous improvement.