Staff Software Engineer: Scalable Backend & Cloud Infra

Kelly Services; Cambridge (MA); Hybrid; USD 200,000 - 275,000; Full time

Job summary

Motion Recruitment Partners (MRP) is seeking Senior and Staff Software Engineers to establish and scale its Boston engineering presence, focusing on backend services, distributed systems, AWS infrastructure, and high-scale development.

You will work with React and Node.js for customer-facing features and collaborate with cross-functional teams to improve performance, reliability, and scale across production systems.

Qualifications

• 6+ years of professional software engineering experience (Senior level) or 10+ years (Staff level).
• Expert-level proficiency with TypeScript and Node.js.
• Extensive experience designing and operating scalable backend services in production environments.
• Strong experience building on AWS (EC2, ECS/EKS, Lambda, S3, RDS, DynamoDB, CloudWatch, IAM, or similar).
• Experience designing distributed systems and microservices architectures.
• Proven track record improving system performance, throughput, latency, and reliability.
• Experience operating services handling high-volume traffic and large-scale datasets.
• Strong understanding of cloud-native application development and observability practices.
• Experience working on teams that own critical online databases, APIs, or high-scale backend services.
• Familiarity with modern frontend technologies including React.
• Strong communication and collaboration skills in cross-functional environments.
• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.

Responsibilities

• Design scalable backend services for high-scale apps.
• Improve system performance, reliability, and latency.
• Build cloud-native infrastructure on AWS.
• Collaborate with product and engineering teams on new features.
• Conduct architecture reviews, mentor engineers, and provide technical leadership.

Skills

TypeScript

Node.js

Distributed systems

AWS

React

Education

Bachelor's degree in CS/Engineering

Tools

Kafka

ClickHouse

Flink

Spark

Job description

Motion Recruitment Partners (MRP) is seeking Senior and Staff Software Engineers to establish and scale its Boston engineering presence, focusing on backend services, distributed systems, AWS infrastructure, and high-scale development.

You will work with React and Node.js for customer-facing features and collaborate with cross-functional teams to improve performance, reliability, and scale across production systems.