Senior .NET Developer - Massachusetts

Kelly Services; Cambridge (MA); Remote; USD 160,000 - 220,000; Full time

Benefits offered by this job

Equity participation

Flexible remote work environment

Medical insurance and benefits

Career growth opportunities

Job summary

Motion Recruitment Partners (MRP) is seeking a Senior .NET Engineer to join a fast-growing software company that handles large-scale scientific and operational data. You will build cloud-native apps with C#, .NET, React, TypeScript, and AWS, delivering scalable products and mission-critical workflows.

The role emphasizes solving hard technical challenges, with a broad stack and cross-functional responsibility.

Qualifications

• 6+ years of software engineering experience.
• Strong experience with C# and .NET.
• Experience building distributed systems and microservices.
• React and TypeScript development experience.
• AWS cloud platform experience.
• Strong understanding of REST APIs and backend services.
• Experience with SQL and NoSQL databases.
• Automated testing experience.
• CI/CD experience using GitHub Actions or similar tools.

Responsibilities

• Hands-on development across backend, frontend, and cloud layers.
• Contribute to architecture decisions and microservice design on AWS.
• Ensure reliability, performance, and security of the platform.
• Collaborate with cross-functional teams and deliver iterations.

Skills

C#

.NET

Distributed systems

React

TypeScript

AWS

REST APIs

SQL/NoSQL

CI/CD

GitHub Actions

Tools

Docker

Job description

$160000 - $220000

Senior .NET Engineer

Join a fast-growing software company that is transforming how organizations manage and leverage large-scale scientific and operational data. This is a full-time opportunity for a Senior .NET Engineer to build cloud-native applications and distributed systems using C#, .NET, React, TypeScript, and AWS. You'll work on highly scalable products that process complex datasets, integrate with external platforms, and support mission‑critical business workflows. Based remotely within the United States.

This is an opportunity for an engineer who enjoys solving difficult technical challenges rather than simply maintaining applications. You'll help design modern microservices, improve platform reliability, drive architecture decisions, and contribute to products that have a direct impact on customers. The team is looking for someone who can operate across the stack, troubleshoot production systems, and help scale a rapidly evolving cloud platform.

Required Skills & Experience

• 6+ years of software engineering experience
• Strong experience with C# and .NET
• Experience building distributed systems and microservices
• React and TypeScript development experience
• AWS cloud platform experience
• Strong understanding of REST APIs and backend services
• Experience with SQL and NoSQL databases
• Automated testing experience
• CI/CD experience using GitHub Actions or similar tools

Desired Skills & Experience

• Docker and containerization
• Infrastructure as Code experience
• Event-driven architecture and message queues
• Observability and monitoring tools
• Large-scale SaaS platform experience
• Experience working with scientific, healthcare, or regulated systems

What You Will Be Doing Tech Breakdown

• 40% Backend Development (.NET/C#)
• 25% Cloud & Microservices (AWS)
• 20% Frontend Development (React/TypeScript)
• 15% Testing, Performance & DevOps

Daily Responsibilities

• 80% Hands-On Development
• 10% Architecture & Technical Planning
• 10% Cross-Functional Collaboration

The Offer

• Competitive base salary
• Bonus eligible
• Equity participation
• Flexible remote work environment

You will receive the following benefits:

• Medical, Dental, and Vision Insurance
• Flexible PTO
• 401(k)
• Life and Disability Insurance
• Professional development opportunities
• Career growth within a highly technical engineering organization

Applicants must be currently authorized to work in the United States on a full-time basis now and in the future. No sponsorship is available for this position.

Motion Recruitment Partners (MRP) is an Equal Opportunity Employer. All applicants must be currently authorized to work on a full-time basis in the country for which they are applying, and no sponsorship is currently available. Employment is subject to the successful completion of a pre-employment screening. Accommodation will be provided in all parts of the hiring process as required under MRP’s Employment Accommodation policy. Applicants need to make their needs known in advance.