Java software developer Jobs in Renton, WA

Salary: $135,200 - 176,800 per year

Requirements:

• Typically more than 3 years of relevant experience developing aerospace software simulation testbeds; earlier-career candidates may be considered with strong coding fundamentals, applied modeling experience, and learning aptitude.
• Relevant project-based masters research involving substantial code development or modeling may count toward experience; coursework alone is less directly applicable.
• Proficiency in C/C++ and object-oriented programming, including practical use of objects and classes.
• Applied experience developing component or system models or simulations; software development without modeling experience is less aligned.
• Working ability in Python or a comparable scripting language.
• Familiarity with Git and software development and testing workflows.
• Understanding of embedded control systems and real-time operating systems, including APIs, interfaces, and device drivers.
• Familiarity with communication protocols such as UDP/TCP, I2C, or UART and component communication within simulations.
• Ability to reason about complex system behavior and component interactions. Space vehicle experience is helpful but not essential; relevant aerospace or comparable complex-system experience is valuable.
• Bachelors degree in Computer Science, Electrical Engineering, or a related technical field.
• Desired: Masters degree in a related technical field, 5+ years working with large-scale engineering systems, and space vehicle simulation integration experience.
• Desired: Docker and containerization experience; Kubernetes experience is also preferred.
• Desired: CI/CD pipelines and tools such as GitLab or GitHub, software/hardware interface debugging, hardware emulation tools such as Simics, and continuous integration system customization.
• Desired: Knowledge of electrical and electronic engineering concepts and IP networking.
• Additional preferences include GNC, six-degree-of-freedom dynamics, DOORS Next Generation, SVN, and Jenkins.
• Due to applicable export requirements, candidates must be a U.S. citizen or national, a U.S. permanent resident (current Green Card holder), or lawfully admitted to the U.S. as a refugee or granted asylum.
• Strong organizational, collaboration, written communication, and verbal communication skills.

Responsibilities:

• Develop, integrate, and refine component models in the software-in-the-loop (SIL) testbed using C/C++; most of our teams coding is in C++.
• Translate component and subsystem requirements into modeled behavior, including component operations, interfaces, and interactions with other vehicle systems.
• Apply object-oriented programming with objects and classes to develop and maintain simulation software.
• Collaborate with subsystem responsible engineers, systems engineers, internal development teams, and customers to clarify simulation requirements and expected behavior.
• Develop and run model tests and integration test scripts, using Python or comparable scripting tools as appropriate.
• Support early integration of program software and investigate unexpected model or system interactions.
• Use Git for routine code development and merging, and contribute to release coordination, documentation, and our CI/CD workflow.
• Work in containerized simulation environments and support hardware/software integration, including anchoring simulations to hardware data.
• Use communication protocols in the simulation environment and collaborate on software/hardware interface debugging.

Technologies:

• CI/CD
• Docker
• Embedded
• Git
• GitHub
• GitLab
• Hardware
• Support
• Jenkins
• Kubernetes
• LESS
• Python
• SVN

More:

We are H10, a nationwide engineering services and consulting firm supporting clients in mechanical and hardware engineering, software and application development, data and analytics, and project and program management. This is a six-month Software-in-the-Loop Test Engineer role focused on modeling and simulation for space systems in Renton, Washington, with potential extensions up to 24 months. The schedule is Monday through Friday, 9 a.m. to 5 p.m., with an expected minimum of 45–50 hours per week and the option to work additional hours. The position is in person and is performed in a normal office environment; work may involve extended sitting, sustained visual concentration, and frequent repetitive computer-related movements. The estimated pay range is $65–$85 per hour and may vary based on job duties, credentials, experience, or location. Eligible employees scheduled for at least 30 hours per week may receive medical, dental, and vision insurance, paid time off, and a 401(k); listed benefits also include a health savings account. We provide equal employment opportunity and consider qualified applicants without discrimination on legally protected grounds.

last updated 46 week of 2026