Sr. Appian Software Developer

Leidos; United States; On-site; USD 107,900 - 195,050; Full time

Job summary

Leidos is seeking a Senior Appian Software Engineer to join the Digital Modernization Sector. The role focuses on Appian design and development, API integrations, and cloud-based delivery within Agile teams.

Candidates should have 5+ years in Appian, Java plugins, and experience with data migrations and AI capabilities. Ideal applicants will hold a technical degree and strong communication, with prior work in federal civilian or DoD environments and familiarity with CI/CD, Jenkins, and container

Qualifications

• Bachelor's degree in Computer Science, Software Engineering or related field.
• Strong written and verbal communication skills.
• Ability to work independently and collaborate within cross-functional Agile teams.
• Experience upgrading Appian platform, plugin remediation, or modernization initiatives.
• Experience implementing Appian Data Fabric.
• Experience migrating data/systems from SQL Server or MariaDB.
• Experience developing or maintaining Appian plugins using Java.
• Familiar with CI/CD pipelines, Jenkins, Docker, or container deployment.
• Experience supporting AWS-hosted or cloud environments.
• Exposure to Kubernetes or container orchestration platforms.
• Exposure to Appian AI capabilities and related features.
• Experience with federal government projects.

Responsibilities

• Design and deliver Appian process models, SAIl interfaces, records and reports.
• Develop robust API integrations (REST/SOAP) connecting Appian with disparate systems.
• Work within Agile/Scrum delivery, using CI/CD and Git/GitLab for source control.
• Support Appian platform upgrades and modernization initiatives.
• Contribute to knowledge transfer and cross-team collaboration.

Skills

Appian design

Appian development

APIs (REST/SOAP)

Agile/Scrum

CI/CD

Git/GitLab

AWS

Docker

Kubernetes

Java plugins

Data Fabric

SQL Server/MariaDB

Federal government work

Education

Bachelor's degree in Computer Science or related field

Master's degree preferred

Tools

Jenkins

Docker

Job description

Description

Looking for an opportunity to make an impact?

Description

Looking for an opportunity to make an impact?

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

If this sounds like the kind of environment where you can thrive, keep reading!

The Digital Modernization Sector brings together our digital transformation and IT programs, allowing us to better serve our customers through scale and repeatability.

Your greatest work is ahead!

We are looking for Senior Appian Software Engineer with 10 plus experience of software development lifecycle practices and secure coding principles.

Experience with design and delivery of complex Appian process models, SAIL (Self-Assembling Interface Layer) interfaces, records, reports, and Appian AI capabilities

Experience with API development and design and development of robust system integrations (REST/SOAP APIs, microservices) connecting Appian with disparate federal agency databases and legacy systems

5+ years of dedicated, hands-on Appian design and development experience with active Senior Developer or Lead Developer certifications

Experience operating within Agile/Scrum delivery environments, utilizing CI/CD pipelines and Git/GitLab for source control. The candidate must have:

• Bachelors Degree in Computer Science, Software Engineering or related field or Masters Degree and 6 to 10 years of related experience. Additional years of experience may be accepted in lieu of degree requirement.
• Strong written and verbal communication skills
• Ability to work independently and collaborate effectively within cross-functional Agile teams
• Experience supporting Appian platform upgrades, plugin remediation, or modernization initiatives
• Experience with implementing Appian’s Data Fabric
• Experience with data and system migrations from SQL Server or Maria Database
• Experience developing or maintaining custom Appian plugins using Java
• Familiarity with CI/CD pipelines, Jenkins, Docker, or containerized deployment approaches
• Experience supporting AWS-hosted or cloud-based application environments
• Exposure to Kubernetes or container orchestration platforms
• Exposure to Appian AI capabilities, AI Skills, AI Copilot, AI Document Processing, or other emerging Appian platform features
• Experience supporting federal government
• Experience contributing to knowledge transfer and cross-team collaboration initiatives within technical organizations

Preferred Skills

• Prior background in C# and full-stack .NET development, highly desired for custom API building and legacy system migrations.
• Hands-on experience implementing Appian AI Copilot, AI Skills, or Intelligent Document Processing (IDP).
• Prior delivery experience within federal civilian or DoD environments
• Appian Senior Developer or Lead Developer Certification

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.

Original Posting

June 29, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline onlyand 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.

About Leidos

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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay And Benefits

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 at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

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.