Senior Software Engineer

SABEL SYSTEMS TECHNOLOGY SOLUTIONS LLC • El Segundo, CA

1d • Hybrid

About The Position

Sabel Systems Technology Solutions, LLC is a leading solution provider and rapidly growing Information and Communications Technology Company specializing in innovative and agile Digital Engineering and Acquisition Technical Stack design, implementation, and support, Strategy and Policy Development, Financial Management, Software Solutions Development, Requirements Analysis and Training. Our client base is mostly in the DoD Federal Government Contracting space and we also partner with prime Government Contractors such as Siemens, Booze Allen, McKinsey and have work in the commercial space as well. We provide clients with large business opportunities and training within our small business agility and people first culture. You will be joining a dynamic and highly motivated team with one goal: "Get quality and secure solutions in the customers hands as soon as possible”. We are seeking a Senior Software Engineer to support a large U.S. Space Force engagement based at Los Angeles Air Force Base in El Segundo, CA. In this role, you will help innovate and maximize efficiency across a Space Force System Delta. The engineer will lead peer code reviews and implement defect tracking tools to identify, document, and resolve issues efficiently. The engineer will help guide the development team in following and implementing the version control measures established by the Quality/Release Engineer. The engineer will lead software architecture discussions, helping to define and refine solution design with an emphasis on UI/UX. New application requirements will be obtained while working directly with customers to understand customer needs, troubleshoot issues, and implement effective short-/long-term solutions. The engineer will independently and collaboratively lead developer training sessions and Ask Me Anything (AMA) events focused on optimizing and continuously improving software architecture and design practices to ensure consistent quality of new feature or capability releases. The Senior Software Engineer will excel at developing custom tools, integrations, or plugins/applications using HTML, CSS, JavaScript, and related technologies such as Python and Groovy. This role requires strong problem-solving and communication skills to collaborate with customers and teammates through Agile ceremonies and tools such as Microsoft Teams, while working independently to deliver solutions. The position offers exposure to Agile methodologies such as Scrum and Kanban and opportunities to collaborate with a diverse team of Agile Coaches, SMs, and other Atlassian Engineers. This role is required to be local to the El Segundo, CA area. All IL5 work will typically be remote, while any IL6 work may require onsite support in El Segundo, as required. Coverage during the customer’s core hours of 8:00 AM – 5:00 PM Pacific, Monday–Friday, is required. Engineer must be willing to support new application release product demonstrations onsite with the customer (up to 25% travel), as required.

Requirements

• US Citizen with a minimum active Secret level security clearance, eligible to upgrade to Top Secret
• Strong spoken and written English skills
• Proven experience as a Full Stack Developer or similar role
• Design and implement both client-side and server-side components of web applications, ensuring seamless integration and functionality
• Develop and manage database structures, ensuring data integrity and security, while optimizing performance for scalable applications
• Create and maintain RESTful APIs to facilitate communication between the front-end and back-end systems
• Lead code reviews, write unit and integration tests, and ensure high-quality code that meets best practices and standards
• Stay current with emerging technologies and industry trends, recommending tools and practices that can enhance development processes and application performance
• Create and maintain comprehensive documentation for code, architecture, and development processes to ensure knowledge sharing across the team
• Proficient with ScriptRunner to manipulate the interface and underlying logics of Jira
• Proficiency in front-end technologies (e.g., HTML, CSS, JavaScript, and/or frameworks like React)
• Strong experience in back-end technologies/frameworks (e.g., Node.js, Python, Express, Django)
• Experience working with Jira/Confluence Data Center versions
• Solid understanding of database management systems (e.g., MySQL, PostgreSQL, MongoDB) and experience with SQL
• Familiarity with version control systems (e.g., Bitbucket, GitLab) and agile development methodologies
• Experience using AI-powered tools as a force multiplier across the software development process — from prototyping and validation to troubleshooting and documentation
• Excellent problem-solving skills and the ability to work collaboratively in a team environment
• Strong communication skills with the ability to articulate technical concepts to non-technical stakeholders
• Ability to telework with clear phone and internet connectivity
• Ability to work remotely at IL5 and report onsite (as required) for IL6 support
• Ability to travel up to 25% of the time to conduct onsite release demonstrations

Nice To Haves

• Bachelor’s degree in Computer Science, Software Engineering, or a related field with 2 years’ experience
• DoD knowledge / experience
• Certified Atlassian Developer
• Experience developing Atlassian plugins
• Experience with Agile methodology, Scrum and Kanban

Responsibilities

• Collaborate directly with customers and internal teams via Microsoft Teams, email, and chat to understand requirements, troubleshoot issues, and implement application solutions.
• Lead and facilitate peer code reviews across multiple development teams, ensuring adherence to coding standards, guidelines, and performance best practices.
• Mentor engineers by providing constructive, actionable feedback that improves both code quality and developer skill.
• Collaborate with Quality/Release Engineer to ensure code aligns with CI/CD standards and best practices.
• Identify patterns, anti-patterns, and opportunities for refactoring code to improve long-term sustainability, while sharing those recommendations with the Quality/Release Engineer to consider for CI/CD standards and best practices.
• Contribute to and evolve internal code review guidelines, tooling, and automation processes in coordination with Quality/Release Engineer.
• Independently and collaboratively lead developer training sessions and Ask Me Anything (AMA) events focused on optimizing and continuously improving software architecture and design practices to ensure consistent quality of new feature or capability releases.
• Lead software architecture discussions, helping to define and refine solution design with an emphasis on UI/UX.
• Establish rapport and communicate regularly with Sabel Engagement Manager, Quality/Release Engineer, Sabel Developers, and Sabel Cyber, escalating any matters that require additional attention and consideration pre-release.
• Develop and customize software functionality by writing JQL/CQL queries, Groovy scripts, and Confluence user macros using HTML, CSS, JavaScript, and/or Python with the ability to also develop in/integrate with other software, including Microsoft Office 365.
• Build integrations or web-based tools, including applications that allow users to interact with AI/ML models and large language models (LLMs).
• Write efficient JQL and SQL queries to support reporting, analytics, and data integration needs.
• Rapidly prototype and iterate on solutions, incorporating feedback and demonstrating progress regularly.
• Independently research, evaluate, and implement potential solutions using Atlassian documentation, community resources, and web research.
• Create and maintain technical documentation, troubleshooting guides, dashboards, and knowledge base articles in Confluence to support both customers and internal teams.
• Develop how-to guides, presentations, and user instructions, ensuring accuracy and professional quality prior to distribution.
• Conduct remote or in-person application feature/capabilities demonstrations, training sessions, and troubleshooting support as required.
• Participate in Agile team activities, including daily stand-ups, sprint reviews, retrospectives, and backlog management.
• Manage individual work tasks through Jira boards and internal ticketing systems, ensuring alignment with service level agreements (SLAs) and timely customer support.
• Coordinate schedules with teammates to ensure customer support coverage during core hours (8 AM – 5 PM Pacific, Monday–Friday).
• Maintain professional communication and collaboration with customers and team members while supporting ongoing digital engineering initiatives.

Benefits

• healthcare
• financial assistance in the event of illness, injury, disability, loss of work, or death
• health savings accounts
• retirement plans
• paid time off
• paid holidays
• education and training program reimbursement

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed
• Number of Employees: 101-250 employees