Senior Java Software Developer

Leidos LLC; Clarksburg (WV); On-site; USD 87,000 - 157,000; Full time

Benefits offered by this job

Health & Wellness programs

Retirement plan

Job summary

Leidos is seeking an experienced Senior Software Engineer with a strong backend focus and full-stack capabilities to design, build, test and maintain scalable software systems. The role emphasizes architecting backend services, developing APIs, and collaborating with cross‑functional teams to deliver reliable, high‑performance applications.

The ideal candidate has deep experience in backend systems, cloud-native architectures, testing, and modern CI/CD practices, with comfort contributing across

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, related field, or equivalent experience.
• 4–8 years (or 2–6 with Master’s) of professional software development experience.
• Experience building RESTful APIs and microservices architectures.
• Strong knowledge of relational databases (PostgreSQL, MySQL).
• Experience with cloud platforms such as AWS, Azure, or Google Cloud.
• Familiarity with containerization technologies like Docker and Kubernetes.
• Experience with CI/CD pipelines and GitLab.

Responsibilities

• Design and develop scalable backend services, APIs, and microservices.
• Create and maintain testing architecture plans and system design for software applications.
• Build, test, and maintain high-performance, secure, and reliable applications.
• Collaborate with product managers, designers, customers, and engineers to deliver features.
• Write clean, maintainable, well-tested code following best practices.
• Review code and mentor junior engineers.
• Support CI/CD pipelines and cloud infrastructure.

Skills

Backend development

RESTful APIs

Java Spring Boot

Cloud platforms

CI/CD

Docker/Kubernetes

Education

Bachelor’s degree in CS/SE or related field

Tools

Jira

Confluence

Job description

We are seeking an experienced Senior Software Engineer with a strong backend focus and full-stack capabilities to design, build, test and maintain scalable software systems. This role will play a key part in architecting backend services, developing APIs, and collaborating with development team to deliver reliable, high-performance applications. The ideal candidate has deep experience in backend systems, cloud-native architectures, testing, and modern CI/CD practices and tools, while also being comfortable contributing across the full stack when needed.

Key Responsibilities

• Design and develop scalable backend services, APIs, and microservices.
• Create and maintain full-scale testing architecture plans and system design for software application.
• Build, test, and maintain high-performance, secure, and reliable applications.
• Collaborate with product managers, designers, customers, and engineers to deliver new features.
• Write clean, maintainable, well-tested code following best practices.
• Review code and mentor junior engineers.
• Optimize applications for performance, scalability, and reliability.
• Support CI/CD pipelines and cloud infrastructure for application.
• Participate in Agile ceremonies including sprint planning, standups, and retrospectives, and PI planning events.
• Troubleshoot production issues and implement long-term solutions.
• Functions as a technical expert across multiple project assignments.

Required Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, related field, or equivalent experience.
• 4-8 years (or 2-6 years with Master’s Degree) of professional software development experience.
• Strong backend development experience in languages such as: Java Spring Boot Hibernate Hibernate using native queries
• Strong automated testing experience in end-to-end testing, regression testing, integration testing, etc
• Experience building RESTful APIs and microservices architectures.
• Strong knowledge of relational databases (PostgreSQL, MySQL, etc.)
• Experience with cloud platforms such as AWS, Azure, or Google Cloud.
• Experience with agile project management software such as Jira, Confluence, etc.
• Familiarity with containerization technologies like Docker and Kubernetes.
• Experience with version control systems such as Git.
• Experience with CI/CD pipelines such as Gitlab.
• Strong understanding of software architecture, design patterns, and system scalability.

Preferred Qualifications

• Experience with frontend frameworks (React, Angular, or Vue).
• Knowledge of infrastructure-as-code tools (Terraform, CloudFormation).
• Experience with observability tools (Datadog, Prometheus, Grafana).

Key Competencies

• Strong problem-solving and analytical thinking.
• Passion for quality control and improving engineering practices.
• Excellent communication and collaboration skills.
• Ownership mindset and accountability for deliverables.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Pay Range: Pay Range $87,100.00 - $157,450.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.