As a Software Engineer at Primus Aerospace, you play a critical role in bridging the gap between advanced digital systems and high-precision physical manufacturing. Primus Aerospace is a leading provider of high-precision machined components, kits, and subassemblies for the aerospace, defense, and space industries. In this role, your code directly impacts the efficiency, quality, and delivery of components that power critical defense systems and space exploration vehicles.

Unlike traditional tech environments where software exists purely in the cloud, your work here directly interfaces with the physical world. You will design, build, and optimize internal tools, enterprise resource planning (ERP) integrations, and automation pipelines that keep the production floor running smoothly. Whether you are developing custom software to track manufacturing metrics, integrating automated quality-control systems, or optimizing database performance, your solutions directly influence operational throughput.

This position requires a unique blend of technical software development skills and a strong curiosity about physical manufacturing workflows. You will collaborate closely with manufacturing engineers, CNC machinists, and executive leadership to build highly reliable software. The systems you build must meet the rigorous quality standards required by the aerospace industry, making this a highly challenging and rewarding environment for engineers who love tangible, high-impact problem-solving.

The questions you will encounter during the Primus Aerospace hiring process are designed to evaluate both your technical software capabilities and your ability to solve real-world operational challenges. These questions are drawn from real candidate experiences and are categorized to help you prepare systematically.

Manufacturing & Systems Integration

Because Primus Aerospace relies heavily on seamless data flow between the production floor and business operations, you will face questions about how you design and integrate complex systems.

• How do you approach integrating a legacy custom database with a modern web API?
• Describe a time you had to write software that interacted directly with hardware or physical machinery.

To succeed in the Primus Aerospace interview process, you must prepare to demonstrate a mix of hard technical skills and practical, cross-functional communication. The hiring team looks for engineers who are excited by physical manufacturing and can translate complex business needs into reliable software.

Technical & Domain Expertise – You must demonstrate a strong grasp of backend development, database management, and API design. Be prepared to discuss how you write clean, testable code and how you design database schemas that can handle complex, multi-step production workflows.

Pragmatic Problem Solving – Interviewers want to see how you approach real-world constraints. In a manufacturing environment, software downtime can halt physical production, so you must show that you prioritize system reliability, clear error handling, and robust testing.

Cross-Functional Communication – You will regularly interact with team members who do not have a software background. You must show that you can translate technical concepts into clear, business-oriented language and that you are eager to spend time on the production floor learning how your users work.

The interview process at Primus Aerospace is straightforward and practical, focusing heavily on team fit, operational understanding, and your ability to solve engineering challenges. The company aims to understand how you work with both engineering leadership and production teams to build practical software solutions.

The process typically begins with a standard human resources screening call to discuss your background, salary expectations, and overall alignment with the role. Following this, you will transition into technical and operational discussions. For out-of-state candidates, these conversations are frequently conducted via video calls (such as Skype or Microsoft Teams), allowing you to get a strong sense of the company culture and team dynamics remotely.

For local candidates or those advancing to the final stages, you will typically visit the facility (such as the Lakewood, CO headquarters). During this on-site visit, you will sit down with the Production Manager to discuss the company's manufacturing workflows, followed by a deep-dive technical discussion with the Director of Engineering regarding the specifics of the software role. A key highlight of the on-site process is a tour of the manufacturing facility, giving you first-hand exposure to the machinery and physical processes your software will support.

The timeline above outlines the typical progression from your initial contact to the final offer stage. Candidates should use this timeline to pace their preparation, ensuring they focus on high-level behavioral and cultural alignment early on, before diving deep into technical preparation and system design concepts for the engineering rounds.

During your interviews, the hiring team will evaluate your capabilities across several key areas that are critical to success in this role.

Industrial Systems Integration & APIs

Because Primus Aerospace relies on data flowing seamlessly between business systems and the factory floor, you must demonstrate a strong understanding of how to connect disparate systems.

Be ready to go over:

• RESTful API Design – How to build robust, secure, and well-documented endpoints that internal applications can consume.
• Database Schema Design – Designing relational databases (such as SQL Server or PostgreSQL) that accurately model physical manufacturing steps, inventory tracking, and quality control.
• Data Synchronization – Handling real-time or near-real-time data updates between local shop-floor databases and centralized cloud systems.

Example scenarios:

• Designing an API that allows quality assurance inspectors to upload inspection results directly from hand-held tablets to the central database.
• Optimizing a slow-running SQL query that tracks the real-time location of aerospace parts across multiple manufacturing stations.

Software Reliability & Architecture

In an aerospace manufacturing environment, software failures can lead to physical production delays. The engineering team will evaluate your ability to write resilient software.

Be ready to go over:

• Error Handling & Logging – Implementing structured logging and automated alerting to catch and diagnose software issues before they impact production.
• Asynchronous Processing – Using message queues or background workers to handle long-running tasks without locking up user interfaces.
• Testing Strategies – Writing unit tests, integration tests, and end-to-end tests to ensure software updates do not introduce regressions into critical workflows.
• Advanced concepts – State machine design for tracking physical part lifecycles, and managing network latency in industrial environments with poor wireless coverage.

Example scenarios:

• Designing an automated notification system that alerts the maintenance team the moment a CNC machine reports a critical hardware fault.
• Architecting a local-first offline storage solution for a tablet application used on the shop floor where Wi-Fi connectivity is inconsistent.

Cross-Functional Collaboration

You will work closely with manufacturing personnel who may have limited technical software experience. Your ability to build empathy and translate requirements is critical.

Be ready to go over:

• Requirement Gathering – Techniques for interviewing production floor workers to understand their pain points and translate them into software requirements.
• User Experience (UX) for Industrial Environments – Designing simple, high-contrast, and intuitive user interfaces that can be easily operated on tablet screens by workers wearing gloves.
• Change Management – How you introduce new software tools to a team that is accustomed to paper-based or legacy processes.

Example scenarios:

• Explaining how you handled a situation where a production manager requested a feature that was technically unfeasible or counterproductive.
• Describing your approach to training shop floor staff on a brand-new inventory tracking software system you developed.