Jr Software Test Engineer Jobs in Boulder, CO (NOW HIRING)

***To be considered for this role, you must be a US Citizen with a US government security clearance - Secret or higher. Additionally, you must either live near or be willing to move to the Boulder, CO area.***

Centil, a Sabel Systems company, is a mission-focused engineering team supporting some of the highest-priority space defense programs in the U.S. Space Force portfolio, including missile defense and missile warning systems for Space Systems Command. Our work spans DevSecOps, CI/CD product development, and space-domain systems engineering, and our people are embedded directly in the programs they support.

In January 2026, Sabel Systems acquired Centil to expand its Advanced Engineering Services capabilities. For our team, that means access to a broader portfolio of programs, deeper corporate resources, and new career pathways - while preserving the technical ownership and small-team culture that defines how we work. It's an exciting time to join Centil: we're growing, the mission portfolio is expanding, and we're building the team that will define what comes next. If you are interested in learning more about Centil or our team, check out our website at www.centil.io.

This opening is for a Software Test Engineer to support the design, development and execution of test plans to ensure the quality and functionality of software applications. This position will work closely with other engineers and program leadership to support the overall goals and objectives of the program.

• Develop and implement new automated test framework and scripts for integration testing
• Design and execute new automated functional tests to be performed at subsystem and system levels for baseline releases and requirements sell off
• Integrate automated tests into Continuous Integration/Continuous Development (CI/CD) pipeline
• Identify and troubleshoot test failures in the pipeline and collaborate with product teams to resolve for integration
• Collaborate with development product teams to understand requirements and design automated test cases
• Document test procedures, results and findings

• Bachelor's degree in Engineering or related field, or related experience
• Familiarity with various software testing methodologies such as unit testing, integration testing, system testing, and acceptance testing
• Hands-on experience using automated testing tools to write and execute test scripts (e.g., Cucumber, Selenium)
• Skilled in using Atlassian tools to support the software development lifecycle (e.g., Jira, Confluence)
• Familiar with continuous integration and continuous deployment (CI/CD) pipelines using GitLab or Jenkins
• Experience with Docker and Kubernetes
• DoD Secret or higher clearance

In addition to job-specific requirements, Centil believes it is important for all employees to possess the following skills/characteristics:

• Strong communication (written and verbal) and presentation skills. Ability to passionately deliver high-level messaging to various types of audiences--this will eventually include senior leaders. Ability to explain technical concepts clearly to non-technical personnel
• Self-motivated individual who actively and independently seeks out opportunities for learning and development
• Collaborates well; enjoys working as part of a team

Depending on experience and skillset, most candidates will earn between $100,000 and $140,000 per year.

Please note that the salary range is a general guideline only. We consider many factors when determining salaries including, but are not limited to, scope and responsibilities of the position, candidate’s work experience, education, training, certifications, key skills, and mission/customer familiarity. We combine these factors with market and business considerations to extend a job offer.

• Generous PTO for vacation, personal, or sick days
• Ten (10) paid holidays per year: 8 fixed holidays, plus 2 additional Floating Holidays per year (taken at Employee's discretion)
• Flex time and the ability to create your own schedule
• Discretionary bi-annual bonus plan, based on individual and company performance
• 401K retirement plan with immediately vested company contributions, no matching required
• Healthcare coverage plan through an Individual Coverage Health Reimbursement Arrangement (ICHRA)
• Employer-paid Life, Long-Term Disability, and Accidental Death and Dismemberment insurances
• Access to optional, employee-paid Life, Accident, Critical Illness, and Hospital Indemnity insurances
• Access to a Dependent Care Flexible Spending Account (FSA)
• Paid training and conference attendance
• Additional benefits, as needed, for significant life events: parental leave, bereavement leave, jury duty pay, military leave pay
• One-time home office reimbursement
• Phone plan reimbursement
• Employee Assistance Program (EAP) services, supporting emotional health and well-being of employees and their families

Centil is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability, protected veteran status or any other status protected by applicable law.