Senior .NET Full-Stack Engineer: Build Scalable Web Apps

Manulife; Boston (MA); On-site; USD 140,000 - 170,000; Full time

Job summary

Manulife is seeking a Senior .NET Full Stack Engineer to build scalable, enterprise-grade digital solutions and deliver secure, customer-centric experiences.

You will work across the full stack—from React front ends to .NET 8 back-end services—driving architectural decisions, engineering best practices, and automation in a fast-paced Agile environment. Mentorship and cross-functional collaboration are key parts of the role.

Qualifications

• 8+ years of full-stack software development in enterprise environments.
• Strong hands-on experience with .NET 8, C#, ASP.NET Core, and Entity Framework.
• Experience building modern front-end applications using React and TypeScript.
• Proven experience designing and developing scalable APIs and distributed systems.
• Hands-on experience with GitHub, GitHub Actions, and CI/CD pipelines.
• Strong understanding of software engineering best practices (design patterns, secure coding, testing).
• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience).

Responsibilities

• Design, develop, and maintain scalable web applications using React (front end) and .NET 8 (back end).
• Build and enhance RESTful APIs and microservices aligned with enterprise standards for security, resiliency, and performance.
• Leverage GitHub and GitHub Actions for source control, code quality, and CI/CD automation.
• Collaborate with product, design, and QA teams to deliver end-to-end features and business outcomes.
• Participate in code reviews, architecture discussions, and sprint planning to ensure engineering excellence.
• Troubleshoot complex technical issues and optimize system performance, reliability, and scalability.
• Mentor junior engineers and contribute to a culture of continuous learning and knowledge sharing.
• Stay current with emerging technologies and recommend improvements to frameworks, tools, and practices.

Skills

NET 8

C#

ASP.NET Core

Entity Framework

React

TypeScript

RESTful APIs

GitHub Actions

CI/CD

Distributed systems

Testing

Education

Bachelor's degree in Computer Science or related field

Tools

GitHub

Azure (AKS)

Docker

Job description

Manulife is seeking a Senior .NET Full Stack Engineer to build scalable, enterprise-grade digital solutions and deliver secure, customer-centric experiences.

You will work across the full stack—from React front ends to .NET 8 back-end services—driving architectural decisions, engineering best practices, and automation in a fast-paced Agile environment. Mentorship and cross-functional collaboration are key parts of the role.