Full Stack Engineer

i3; Chantilly (VA); On-site; USD 150,000 - 230,000; Full time

Job summary

i3 is seeking a Full Stack Engineer - SME in Chantilly, VA to drive enterprise web applications across frontend and backend stacks. You will lead architecture, modernization, and secure development practices, aligning with zero-trust and cross-enclave requirements.

Required: 10+ years and a Bachelor's degree; on-site role in Chantilly, VA. Strong leadership and DevSecOps experience are essential.

Qualifications

• Bachelor's degree required in a technical field.

Responsibilities

• Lead full-stack architecture, application modernization, and secure development.

Skills

Frontend frameworks

Backend technologies

APIs

Databases

DevSecOps & CI/CD

Security best practices

Leadership

Education

Bachelor's degree

Tools

Kubernetes

Terraform

GitLab CI/CD

JFrog Artifactory

AWS

Vue.js

Flask

Elixir

Phoenix LiveView

Daisy UI

Python

Cribl

Apache NiFi

Postgres

Apache Kafka

Splunk

Custom GOTS applications

Job description

Full Stack Engineer

Top Secret required

Location is Chantilly, VA on site

Bachelors required

Minimum 10 years experience

We are seeking a Full Stack Engineer - Subject Matter Expert (SME). This individual will serve as the principal authority for full-stack architecture, application modernization, secure development practices, and enterprise technology integration. The Full Stack Engineer SME will lead the design, development, and optimization of scalable web applications across both frontend and backend technologies. The role combines strategic technical leadership with hands-on development, ensuring applications are secure, high-performing, interoperable, and aligned with enterprise architecture standards, zero-trust principles, and complex cross-enclave requirements.

Skills required

• Extensive experience with modern frontend frameworks, backend technologies, APIs, and relational/non-relational databases.
• Strong knowledge of software architecture, system integration, and scalable application design.
• Experience with secure development practices, DevSecOps methodologies, and CI/CD pipelines.
• Expertise in database design, performance optimization, and application troubleshooting.
• Proven ability to lead technical initiatives and establish development standards across teams.

Unique Skills / Technical Requirements

• In-house custom developed data pipeline
• Kubernetes
• Terraform
• GitLab CI/CD
• JFrog Artifactory
• AWS Cloud Services
• UI
  • Vue.js
  • Flask
  • Elixir
  • Phoenix LiveView
  • Daisy UI
• ETL
  • Python
  • Cribl
  • Apache Nifi
  • Database (Postgres)
  • Apache Kafka
  • Splunk
  • Custom GOTS application(s)
  • Complex data parsing and streamlined ingestion
  • Provenance and end-to-end data lineage tracking
  • Schema-aligned ingestion and normalization of diverse structured and unstructured data

Preferred skills

• Master's degree in Computer Science, Engineering, or a related technical field.
• Experience supporting federal, defense, intelligence, or highly regulated environments.
• Knowledge of cloud-native architectures, containerization, and microservices platforms.
• Experience addressing cross-domain or cross-enclave interoperability challenges.
• Expertise in zero-trust architectures and secure enterprise application development.
• Relevant certifications in cloud technologies, software architecture, cybersecurity, or Agile development.