Senior Appian Software Engineer Jobs in Reston, VA

ICF is seeking an Appian Developer with strong experience supporting Appian application development, plugin remediation, and modernization initiatives within complex enterprise environments. The ideal candidate will have a proven ability to develop and maintain Appian solutions, troubleshoot technical issues, and support custom plugin conversion efforts associated with platform upgrades and modernization activities. This role requires the ability to collaborate effectively across Agile delivery teams, contribute to technical solution development, and support evolving Appian platform capabilities within a fast-paced delivery environment.

Responsibilities:

Appian Development & Plugin Conversion

• Design, develop, enhance, and maintain Appian applications supporting complex business and operational workflows

• Support remediation, conversion, and modernization of custom Appian plugins to align with updated platform standards and compatibility requirements

• Troubleshoot and resolve issues related to custom plugins, integrations, and Appian application functionality

• Collaborate with architects and senior developers to implement scalable and maintainable technical solutions

• Support Appian platform upgrades and related application modernization activities

• Assist with development and maintenance of reusable components, shared services, and integration frameworks

Technical Design & Development Support

• Participate in technical design discussions, code reviews, and solution implementation activities

• Develop and maintain technical documentation, deployment instructions, and support artifacts

• Support integration efforts involving APIs, web services, databases, and external systems

• Write and optimize SQL queries to support application functionality and reporting needs

• Ensure development activities align with coding standards, security requirements, and best practices

• Collaborate with QA teams to support defect resolution, testing activities, and deployment readiness

Agile Delivery & Collaboration

• Participate in Agile ceremonies including sprint planning, backlog refinement, daily standups, sprint reviews, and retrospectives

• Collaborate with Scrum Masters, Business Analysts, developers, QA teams, and stakeholders to support successful delivery outcomes

• Assist with estimation, technical planning, and delivery coordination activities

• Support troubleshooting, root cause analysis, and issue resolution efforts across development and testing environments

• Contribute to a collaborative team environment focused on continuous improvement and delivery quality

Modernization & Continuous Improvement

• Support application modernization initiatives within complex Appian environments

• Assist with efforts related to plugin remediation, technical debt reduction, and platform optimization

• Identify opportunities to improve development efficiency, maintainability, and operational stability

• Stay current on Appian platform updates, development best practices, and emerging capabilities

• Support knowledge-sharing initiatives across the broader Appian practice, including exposure to Appian AI capabilities where applicable

Required Skills:

• 3+ years of professional software development experience

• Bachelor's degree

• 2+ years of hands-on Appian development experience

• 2+ years of experience supporting Appian application development within Agile software delivery environments

• 2+ years of experience working with custom Appian plugins, Java-based development, or integration components

• 2+ years of experience working with relational databases and writing SQL queries

• 2+ years of experience utilizing Git/GitLab or similar source control workflows

• US Citizenship or Green Card is required (required by the federal government for this position).

• Must be able to obtain Public Trust clearance.

• MUST RESIDE IN THE United States (U.S.) and the work MUST BE PERFORMED in the United States (U.S.), as this work is for a federal contract and laws do apply.

Preferred Skills:

• Strong understanding of software development lifecycle practices and secure coding principles

• Appian Certified Associate Developer or Appian Certified Senior Developer certification

• Strong analytical, troubleshooting, and problem-solving skills

• 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 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

• Familiarity with REST/SOAP integrations and API development

• 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 or public sector technology programs

• Experience contributing to knowledge transfer and cross-team collaboration initiatives within technical organizations

Working at ICF

ICF is a global advisory and technology services provider, but we're not your typical consultants. We combine unmatched expertise with cutting-edge technology to help clients solve their most complex challenges, navigate change, and shape the future.

Pay Range - There are multiple factors that are considered in determining final pay for a position, including, but not limited to, relevant work experience, skills, certifications and competencies that align to the specified role, geographic location, education and certifications as well as contract provisions regarding labor categories that are specific to the position.

The pay range for this position based on full-time employment is:

$98,614.00 - $167,644.00Nationwide Remote Office (US99)