Senior Fullstack (React.JS/.NET) Engineer

Our client is a US-based remote-online-learning provider serving students through live digital instruction and operational student-support workflows. Together with Nucleus AI, the client is building the CCA Wellness Check Compliance Platform — a focused internal system for recording, tracking, and proving weekly student wellness checks.

The platform is designed to solve a concrete compliance and operations problem: the school needs a reliable way to confirm that weekly student wellness checks happened, maintain an auditable record, identify students who were not seen, and support escalation workflows when follow-up is required.

The MVP is time-sensitive and must be production-ready before the August teacher training window and September operational launch.

You’ll join a delivery team building a practical compliance platform from the ground up, working closely with product, engineering, QA, delivery, and client stakeholders.

Responsibilities

Fullstack Product Development

• Build and maintain end-to-end product features across backend services and frontend application layers.
• Work with frontend frameworks such as React, Angular, or Blazor to deliver user-facing functionality.
• Integrate frontend applications with backend APIs and ensure smooth client-server communication.
• Debug issues across the full application stack, including frontend behavior, API contracts, backend logic, database interactions, and deployment environments.
• Collaborate with product, design, frontend, backend, and AI/ML teams to translate requirements into working product features.
• Ensure frontend and backend changes are aligned, tested, and production-ready.

Backend Development & Architecture

• Design and build scalable backend services using .NET Core / .NET Framework.
• Develop RESTful APIs and microservices using ASP.NET Core.
• Apply clean architecture principles and enforce coding standards.
• Ensure systems are performant, secure, and maintainable.

Cloud & Infrastructure

• Build and operate services on Microsoft Azure, including App Services, Functions, Azure SQL, and AKS.
• Implement CI/CD pipelines using Azure DevOps or GitHub Actions.
• Work with containerized environments such as Docker and Kubernetes.
• Ensure system reliability, monitoring, and disaster recovery strategies.

Code Quality & Performance

• Conduct code reviews and enforce best practices across backend and frontend codebases.
• Implement unit, integration, and end-to-end testing where appropriate.
• Monitor, profile, and optimize system performance across application layers.

Security & Compliance

• Implement secure authentication and authorization using OAuth, JWT, or similar approaches.
• Follow OWASP best practices.
• Ensure data protection and system integrity.

Documentation & Improvement

• Document technical decisions, API contracts, system behavior, and development workflows.
• Continuously improve system design and development workflows.
• Stay current with .NET, frontend, and cloud ecosystem developments.

Requirements

• 5+ years of professional engineering experience, with strong commercial experience in .NET / C#.
• Strong experience with ASP.NET Core, Web API, Entity Framework, and SQL Server.
• Hands-on frontend experience with React, Angular, Blazor, or a comparable modern frontend framework.
• Ability to build fullstack features from database and backend logic through API design and frontend implementation.
• Experience integrating frontend applications with REST APIs and debugging client-server issues.
• Hands-on experience with Microsoft Azure.
• Experience with CI/CD pipelines and Git.
• Experience with Docker and Kubernetes.
• Strong understanding of SDLC, SOLID, and design patterns.
• Experience with unit testing frameworks such as xUnit, NUnit, or MSTest.
• Ability to debug and resolve complex issues across the full application stack.
• Strong communication skills and ability to work closely with cross-functional teams.
   

Nice to Have

• Experience with React or AngularJS.
• Experience with messaging systems such as RabbitMQ, Kafka, or Azure Service Bus.
• Familiarity with NoSQL databases such as Cosmos DB or MongoDB.
• Azure certifications.
• Experience in LMS, edtech, legal-tech, fintech, or data-heavy platforms.
• Experience working with AI-assisted systems, AI/ML integrations, or data-driven product features.

What Matters for This Role

• Ownership mindset — ability to take responsibility for features and systems end-to-end.
• Strong backend engineering foundation combined with practical frontend delivery skills.
• Comfort working in ambiguous, fast-moving environments.
• Strong engineering judgment and pragmatic decision-making.
• Ability to collaborate across backend, frontend, cloud, product, and AI/ML teams.