ICF is seeking a Senior Appian Developer with strong experience supporting complex Appian environments, custom plugin development, and application modernization initiatives. The ideal candidate will have a proven ability to lead technical solution development, support large-scale plugin remediation efforts, and guide modernization activities associated with evolving Appian platform capabilities. This role requires deep technical expertise, strong collaboration skills, and the ability to mentor development teams while supporting delivery within fast-paced Agile environments.
Responsibilities:
Appian Development & Plugin Conversion
Design, develop, enhance, and maintain complex Appian applications supporting enterprise business processes and operational workflows
Lead remediation, conversion, and modernization efforts for custom Appian plugins to ensure compatibility with updated Appian platform standards
Analyze legacy plugin implementations and recommend scalable modernization approaches and technical improvements
Troubleshoot and resolve complex technical issues involving Appian applications, integrations, custom plugins, and infrastructure dependencies
Collaborate with architects and technical leadership to define solution approaches, development standards, and modernization strategies
Support Appian platform upgrades and associated remediation activities across development, testing, and production environments
Technical Leadership & Architecture Support
Provide technical leadership, mentorship, and guidance to development teams supporting Appian modernization initiatives
Participate in architecture discussions, technical design reviews, code reviews, and implementation planning activities
Develop and maintain reusable components, shared frameworks, and integration standards to improve delivery efficiency and maintainability
Ensure development activities align with security requirements, coding standards, and Appian best practices
Support integration efforts involving APIs, web services, databases, and external enterprise systems
Assist with performance optimization, scalability improvements, and operational stability initiatives
Agile Delivery & Cross-Functional Collaboration
Participate in Agile ceremonies including sprint planning, backlog refinement, sprint reviews, and retrospectives
Collaborate closely with Scrum Masters, Business Analysts, QA teams, architects, and stakeholders to support successful delivery outcomes
Assist with technical estimation, release planning, dependency management, and risk identification activities
Support troubleshooting, root cause analysis, and resolution of complex production or deployment issues
Promote continuous improvement across development workflows, delivery processes, and technical standards
Modernization, Innovation & Knowledge Transfer
Support long-term modernization strategies within complex Appian environments
Identify opportunities to improve maintainability, operational stability, automation, and delivery efficiency
Stay current on Appian platform updates, emerging technologies, and modernization best practices
Support knowledge-sharing and mentoring initiatives across the broader Appian practice
Provide technical guidance and knowledge transfer related to emerging Appian AI capabilities, including AI-assisted workflows and platform features where applicable
Assist leadership in evaluating future modernization opportunities involving Appian AI and related platform capabilities
Required Skills:
6+ years of professional software development experience
Bachelor’s degree
4+ years of hands-on Appian development experience
4+ years of experience supporting Appian application development within Agile software delivery environments
4+ years of experience troubleshooting and supporting Appian applications in self-managed/on-premises Linux environments, including navigating Appian installations and reviewing application and server logs to diagnose issues.
4+ years of experience supporting complex integrations involving APIs, web services, databases, and external systems
4+ years of experience utilizing Git/GitLab and modern 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:
Appian Certified Senior Developer or Appian Certified Lead Developer certification
Strong understanding of Appian platform operations and the ability to investigate and resolve platform issues across Linux-hosted Appian environments.
Strong experience developing, maintaining, or modernizing custom Appian plugins using Java
Strong understanding of software architecture, secure coding principles, and software development lifecycle practices
Strong proficiency with SQL and relational database concepts
Strong analytical, troubleshooting, and problem-solving skills with the ability to diagnose and resolve complex technical issues
Excellent written and verbal communication skills
Ability to work independently while mentoring and collaborating effectively across cross-functional Agile teams
Experience leading Appian modernization, platform upgrade, or plugin remediation initiatives
Experience developing enterprise-scale Appian solutions within federal government or public sector environments
Familiarity with CI/CD pipelines, Jenkins, Docker, Kubernetes, or containerized deployment approaches
Experience supporting AWS-hosted or cloud-native application environments
Strong experience with REST/SOAP integrations, API development, and enterprise integration patterns
Exposure to Appian AI capabilities, AI Skills, AI Copilot, AI Document Processing, AI Agents, or other emerging Appian platform features
Hands-on experience implementing or evaluating Appian AI capabilities strongly preferred
Experience supporting technical knowledge transfer and mentoring initiatives across development organizations
Experience contributing to architecture governance, technical standards, or modernization strategy efforts
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.We can only solve the world's toughest challenges by building a workplace that allows everyone to thrive. We are an equal opportunity employer. Together, our employees are empowered to share their expertise and collaborate with others to achieve personal and professional goals. For more information, please read our EEO policy.
We will consider for employment qualified applicants with arrest and conviction records.
Reasonable Accommodations are available, including, but not limited to, for disabled veterans, individuals with disabilities, and individuals with sincerely held religious beliefs, in all phases of the application and employment process. To request an accommodation, please email [email protected] and we will be happy to assist. All information you provide will be kept confidential and will be used only to the extent required to provide needed reasonable accommodations.
Read more about workplace discrimination rights or our benefit offerings which are included in the Transparency in (Benefits) Coverage Act.
At ICF, we are committed to ensuring a fair interview process for all candidates based on their own skills and knowledge. As part of this commitment, the use of artificial intelligence (AI) tools to generate or assist with responses during interviews (whether in-person or virtual) is not permitted. This policy is in place to maintain the integrity and authenticity of the interview process.
However, we understand that some candidates may require accommodation that involves the use of AI. If such an accommodation is needed, candidates are instructed to contact us in advance at [email protected]. We are dedicated to providing the necessary support to ensure that all candidates have an equal opportunity to succeed.
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)Skills Required
- 6+ years of professional software development experience
- Bachelor's degree
- 4+ years of hands-on Appian development experience
- 4+ years supporting Appian application development in Agile environments
- 4+ years troubleshooting and supporting Appian in self-managed/on-premises Linux environments, including navigating installations and reviewing logs
- 4+ years supporting complex integrations involving APIs, web services, databases, and external systems
- 4+ years utilizing Git/GitLab and modern source control workflows
- US Citizenship or Green Card (required by the federal government)
- Must be able to obtain Public Trust clearance
- Must reside in the United States and perform work in the United States
- Experience with custom Appian plugin development and remediation (plugin modernization)
ICF Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about ICF and has not been reviewed or approved by ICF.
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Healthcare Strength — Medical, dental, and vision coverage start on day one with multiple plan options, employer HSA/HRA funding, and company‑paid mental‑health care that includes 10 therapy and 10 coaching sessions annually. These features indicate comprehensive coverage with meaningful mental‑health depth.
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Parental & Family Support — Family‑building and caregiving support include 24/7 specialists and reimbursements ($10,000 lifetime for fertility/surrogacy and $5,000 for adoption), alongside inclusive paid parental leave. These resources broaden support for diverse family needs.
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Retirement Support — The 401(k) offers immediate vesting with a company match up to 4% when contributing 5%, and an ESPP provides an additional ownership avenue. This structure supports long‑term financial security.
ICF Insights
What We Do
ICF is a leading global solutions and technology provider with approximately 9,000 employees in industries across the public and private sectors. We combine unmatched expertise with cutting-edge technology to help clients solve their most complex challenges, navigate change, and shape the future.
Why Work With Us
At ICF, we’ve built a culture rooted in expertise, innovation, and purpose—enabling us to build a more prosperous and resilient world for all. When our employees grow, our solutions thrive—regardless of your role, team, or location, you’ll have opportunities to make connections, build community, and take action to develop your career.
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