Senior Full-Stack Engineer - TS/SCI Poly Ready

Castalia Systems; Washington (District of Columbia); On-site; USD 140,000 - 145,000; Full time

Benefits offered by this job

Medical

Dental

Vision

401k matching

Generous PTO

Paid holidays

Professional training opportunities

Pet insurance

Job summary

Castalia Systems is seeking a Senior Full Stack Software Engineer to develop, integrate, test, and maintain software across the stack. You will collaborate with engineers, architects, and mission stakeholders to translate requirements into reliable software solutions.

The role requires 8+ years of software engineering, strong Python/Java skills, and experience building web apps with React/Angular, plus a TS/SCI clearance with polygraph.

Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or related field.
• 8+ years of software engineering experience including building/testing/integrating/maintaining software.
• 5+ years developing applications in Python, Java, or similar OO language.
• 4+ years building web apps using frontend frameworks such as React or Angular.
• Experience developing or integrating backend services and RESTful APIs.
• Experience with relational databases like PostgreSQL and SQL.
• Experience with automated build, test, CI/CD processes.
• Experience in Agile environments (Scrum/Kanban).
• Experience using Jira.
• TS/SCI clearance with a polygraph.

Responsibilities

• Use modern development tools, frameworks, and cloud technologies to solve technical and mission problems.
• Develop backend services, APIs, data integrations, and user-facing capabilities within existing architectures.
• Participate in design discussions, troubleshoot issues, and review code to improve quality.
• Collaborate with senior engineers to evaluate approaches and improve development practices.

Skills

10+ years experience

Python/Java OO languages

Frontend web apps (React/Angular)

RESTful APIs

SQL/PostgreSQL

CI/CD

Agile/Scrum/Kanban

Jira

TS/SCI clearance w polygraph

Education

Bachelor's degree in CS/Engineering/IT or related field

Tools

Jira

Kubernetes

CloudFormation

GitHub Actions

GitLab

Jenkins

Docker

Job description

Castalia Systems is seeking a Senior Full Stack Software Engineer to develop, integrate, test, and maintain software across the stack. You will collaborate with engineers, architects, and mission stakeholders to translate requirements into reliable software solutions.

The role requires 8+ years of software engineering, strong Python/Java skills, and experience building web apps with React/Angular, plus a TS/SCI clearance with polygraph.