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# Senior Backend Software Engineer (Java/Node.JS)

- **Company:** Leidos, Inc.
- **Location:** Reston, VA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $80,000.0 - $100,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Amazon Web Services, Cloud Computing, Cloud Engineering, Code Review, Databases, Data Structures, Distributed Systems, Memory Management, Github, Java Virtual Machine (JVM), Spring Framework, Linux System Administration, Node.Js, NoSQL, Object-Oriented Software Development, Scrum Methodology, Software Architecture, SQL Databases, Cloud Platform System, Express.js, Concurrency, Spring-boot, Backend, Concourse, Containerization, Solid Principles, Kubernetes, Codebase, Functional Programming, Restful APIs, Terraform, Jenkins, Microservices
- **Published:** August 29, 2026
- **Apply:** https://www.careerjet.com/jobad/usfe8fca1767defb51139efa4f6e6c706f

## About the Role

This role requires someone who can move comfortably between Java/Spring and JavaScript/Node.js codebases, has a solid grounding in computer science fundamentals and distributed systems, and takes ownership of issues from identification through resolution with minimal supervision., Java / Backend Development

 * Strong hands-on Java experience with Spring Framework/Spring Boot
 * Experience designing REST APIs and backend microservices
 * Solid grasp of OOP, software design principles, and backend architecture
 * Familiarity with asynchronous, reactive, or functional programming
 * Ability to troubleshoot complex backend and distributed-system issues

JavaScript / Node.js

 * Hands-on Node.js backend experience, including async patterns and frameworks like Express.js
 * Comfortable working across both Java and Node.js codebases

Cloud / Infrastructure

 * Strong AWS experience (or comparable cloud platform)
 * Experience with containerized applications and Kubernetes (EKS preferred)
 * Familiarity with Terraform/IaC and CI/CD tools (GitHub Actions, Jenkins, or similar)
 * Comfortable in Linux environments

CS Fundamentals

 * Strong grounding in data structures/algorithms, concurrency, distributed systems, and system design
 * JVM and memory management fundamentals
 * Database fundamentals (SQL and NoSQL)

Communication & Ownership

 * Strong communicator across engineering, product, and cross-team stakeholders
 * Proactively surfaces blockers and risks rather than waiting to be asked
 * Owns issues end-to-end, including production incidents, with minimal supervision

## Description

We're looking for a Senior Backend Software Engineer with strong hands-on experience across both Java and Node.js to support backend and microservice development for our client. You'll work on REST APIs and distributed backend systems deployed in a cloud-native, containerized environment, collaborating closely with engineers, technical leads, and product managers across multiple teams., * Design, develop, and maintain backend services and REST APIs using Java, Spring Framework/Spring Boot, and Node.js

 * Build and support containerized microservices deployed on AWS, including Kubernetes/EKS environments
 * Apply asynchronous, reactive, or functional programming patterns where appropriate across both Java and JavaScript codebases
 * Troubleshoot complex backend and distributed-system issues, performing root-cause analysis and driving fixes through to resolution
 * Work with Infrastructure as Code (Terraform preferred) and CI/CD pipelines (GitHub Actions, Concourse, Jenkins, or similar) to support deployment and delivery
 * Design and implement integrations with SQL and NoSQL databases
 * Participate in code reviews, sprint planning, technical discussions, and troubleshooting sessions
 * Proactively identify and escalate blockers, risks, and dependencies rather than waiting for others to surface them
 * Take ownership of production issues, coordinating resolution across internal and partner teams
 * Communicate technical issues, risks, and proposed solutions clearly to both technical and non-technical stakeholders


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