Senior Software Engineer - FFPP

Innovative Systems & Solutions | Full time - Onsite

Annapolis Junction, United States | Posted on 03/17/2026

Innovative Systems & Solutions (ISS) works with a wide spectrum of talent to establish an atmosphere that stimulates creativity, constant progress, and achievement. At ISS, you will have the chance to immediately impact government transformation and our clients' missions by offering information solutions and services to Federal and Department of Defense (DoD) customers. Employees at ISS can look forward to exciting career opportunities.

About the Role

The Software Engineer develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics,novel algorithm development, manipulation of extremely large data sets,real-time systems, and business management information systems) based upon documented requirements. Works individually or as part of a team. Reviews andtests software components for adherence to the design requirements and documents test results. Resolves software problem reports. Utilizes software development and software design methodologies appropriate to the development environment.

Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of Commercial Off-the-shelf (COTS)/Government Off-the-shelf (GOTS) in place of new development, and requirements analysis and synthesis from system level to individual software components.

Key Responsibilities

• Analyze user requirements to derive software design and performance requirements
• Designand code new software or modify existing software to add new features
• Debug existing software and correct defects
• Integrate existing software into new or modified systems or operating environments
• Develop simple data queries for existing or proposed databases or data repositories
• Provide recommendations for improving documentation and software development process standards
• Developor implement algorithms to meet or exceed system performance and functional standards
• Assist with developing and executing test procedures for software components
• Writeor review software and system documentation
• Develop software solutions by analyzing system performance standards, confer withusers or system engineers; analyze systems flow, data usage and work processes; and investigate problem areas
• Serveas team lead at the level appropriate to the software development process being used on any particular project Modify existing software to correct errors, to adapt to new hardware, or to improve its performance
• Design,develop and modify software systems, using scientific analysis andmathematical models to predict and measure outcome and consequences ofdesign Design or implement complex database or data repository interfaces/queries
• Oversee one or more software development teams and ensure the work is completed in accordance with the constraints of the software development process beingused on any particular project Design or implement complex algorithms requiring adherence to strict timing, system resource, or interface constraints
• Perform quality control on team products
• Confer with system engineers and hardware engineers to derive software requirements and to obtain information on project limitations and capabilities, performance requirements and interfaces
• Coordinate software system installation and monitor equipment functioning to ensure operational specifications are met Implement recommendations for improving documentation and software development process standards

Qualifications

Fourteen (14) years’ experience as a SWE in programs and contracts of similar scope, type,and complexity is required. A Bachelor’sdegree in Computer Science or related discipline from an accredited college or university is required. Four (4) years of additional SWE experience on projects with similar software processes may be substituted for a bachelor’s degree.

Salary Range

salary range provided is a general guideline. ISSI considers several factors when determining compensation, including the role’sresponsibilities, candidate experience, education, skills, and current…