Sr. Appian Software Developer

Leidos is hiring a Senior Appian Software Developer to support secure, end-to-end delivery work involving Appian process and integration solutions in a remote setting. This role focuses on hands-on Appian development across interfaces, data/reporting capabilities, and AI-enabled features, alongside API and microservices integration with enterprise and legacy environments.

In this position, you will apply software development lifecycle practices and secure coding principles while working in Agile/Scrum delivery and modern CI/CD workflows. The role also includes platform and modernization support, plus development of custom capabilities using Java.

Responsibilities

• Design and deliver complex Appian process models, SAIL (Self-Assembling Interface Layer) interfaces, records, reports, and Appian AI capabilities
• Develop and design APIs and build robust system integrations using REST/SOAP APIs and microservices, connecting Appian to disparate federal agency databases and legacy systems
• Support Appian platform upgrades, plugin remediation, or modernization initiatives
• Implement Appian’s Data Fabric
• Develop or maintain custom Appian plugins using Java
• Contribute to knowledge transfer and cross-team collaboration within technical organizations

Requirements

• 10+ years of experience applying software development lifecycle practices and secure coding principles
• 5+ years of hands-on Appian design and development experience, with active Senior Developer or Lead Developer certifications
• Experience delivering in Agile/Scrum environments, using CI/CD pipelines and Git/GitLab for source control
• Bachelor’s Degree in Computer Science, Software Engineering, or related field, or a Master’s Degree, plus 6 to 10 years of related experience (additional experience may be accepted in lieu of degree)
• 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 implementing Appian’s Data Fabric
• Experience with data and system migrations from SQL Server or Maria Database
• Familiarity with CI/CD pipelines, Jenkins, Docker, or containerized deployment approaches
• Experience supporting AWS-hosted or cloud-based application environments
• Exposure to Kubernetes or other container orchestration platforms
• Exposure to Appian AI capabilities, including AI Skills, AI Copilot, AI Document Processing, or other emerging Appian features
• Experience supporting federal government

Technologies

• Appian, SAIL (Self-Assembling Interface Layer)
• REST APIs, SOAP APIs, microservices
• Git, GitLab, CI/CD pipelines
• Jenkins, Docker, Java
• SQL Server, Maria Database
• AWS, cloud-based application environments
• Kubernetes
• Appian AI capabilities (AI Skills, AI Copilot, AI Document Processing), Data Fabric
• Custom Appian plugins

Benefits

• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement
• Competitive compensation

Preferred Skills

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

Location: Remote (remote)

Salary: USD 107,900 - 195,050 per year

Pay Range: $107,900.00 - $195,050.00