Senior Software Engineer - Data Infrastructure

About the job Senior Software Engineer - Data Infrastructure

About Castelion

Castelion is bringing a new approach to defense development and production : one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.

Senior Software Engineer - Data Infrastructure

Were looking for a hands-on software architect who can design and build Castelion's mission data infrastructure from the ground up. Our hardware generates terabytes of telemetry and test data across manufacturing, lab, and flight environments. You will be the first engineer to architect this company-wide system, from ingestion through visualization, ensuring our hardware teams, technicians, and analysts can get the right data at the right time. This role is not about wiring together existing cloud tools, its about inventing the architecture, designing core services, and implementing the systems that will define how Castelion handles data for years to come.

Responsibilities

• Architect and implement scalable systems for real-time and batch ingestion of telemetry, test, and manufacturing data from heterogeneous sources.
• Design and build APIs, storage models, and query systems for continuous time series data with rich metadata.
• Implement data access and visualization layers for non-software users (engineers, analysts, technicians).
• Define performance, reliability, and scalability requirements - and meet them with clean, maintainable code.
• Establish coding standards and software development best practices for infrastructure engineering at Castelion.

Basic Qualifications

Bonus Points

Leadership Qualities

ITAR Requirements

Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin / ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

All employees are granted long-term stock incentives as part of their employment at Castelion. All employees receive access to comprehensive medical, vision, and dental insurance, and the company offers four weeks of paid time off per year.