Senior Full-Stack Engineer: Performance & Scale (Hybrid)

System One; Reston (VA); Hybrid; USD 120,000 - 160,000; Full time

Job summary

System One is seeking a Senior Full Stack Engineer in Reston to drive performance-focused development across Java backend and frontend components. You will work within a hybrid model, combining on-site and remote collaboration to optimize applications and services in AWS.

The role emphasizes performance testing, bottleneck analysis, and data-driven remediation across microservices, databases, and cloud configurations. Strong communication and problem-solving are essential.

Qualifications

• 5+ years of full stack software engineering experience with hands-on development and troubleshooting.
• Strong Java development skills for backend services, APIs, and performance tuning.
• Hands-on performance engineering experience with test scripts.

Responsibilities

• Develop and execute end-to-end performance tests and analyze bottlenecks.
• Investigate performance issues and implement remediation.
• Tune Java applications, optimize PostgreSQL queries, review AWS configs.
• Retest after remediation and provide data-driven recommendations.

Skills

Java backend development

Performance tuning

Performance testing

Troubleshooting

Communications

Root-cause analysis

System optimization

AWS

Distributed systems

Frontend basics

Education

Bachelor's degree in computer science or related field

Tools

JMeter

LoadRunner

Gatling

Dynatrace

Splunk

CloudWatch

Job description

System One is seeking a Senior Full Stack Engineer in Reston to drive performance-focused development across Java backend and frontend components. You will work within a hybrid model, combining on-site and remote collaboration to optimize applications and services in AWS.

The role emphasizes performance testing, bottleneck analysis, and data-driven remediation across microservices, databases, and cloud configurations. Strong communication and problem-solving are essential.