Sr Software Engineer (Python, C++)

Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth. We are seeking a Senior Software Engineer to design, develop, and maintain complex software systems supporting high-performance and data-intensive applications. This role focuses on building scalable solutions in Linux environments, with an emphasis on Python and C++ development, real-time processing, and advanced algorithm implementation. The ideal candidate has extensive experience working across the full software development lifecycle and is comfortable leading technical efforts while collaborating with cross-functional engineering teams. Responsibilities Design, develop, and maintain complex software systems based on defined requirements Analyze user and system requirements to derive software design and performance specifications Develop new software features and enhance existing applications to improve functionality and performance Debug and resolve software defects and performance issues Implement and optimize algorithms to meet system performance and timing requirements Integrate software components into new or existing systems and environments Develop and execute test procedures and validate software performance Design and implement database queries and data processing logic Produce and review technical documentation for software and system components Collaborate with system and hardware engineers to define requirements, constraints, and interfaces Evaluate software design trade-offs, including reuse of existing solutions (COTS/GOTS) Monitor system performance and ensure operational requirements are met Provide recommendations to improve development processes, documentation, and system performanceLead or support software development teams and ensure delivery aligns with project requirements Required Qualifications Must be fully cleared with a recent MD polygraph Must be willing and able to work fully onsite at the location listed in this posting Bachelor’s degree in Computer Science or a related field (or equivalent experience) 14+ years of experience as a Software Engineer in programs of similar scope and complexity Strong experience developing software in Linux environments Strong programming experience in Python and C++ Experience developing and maintaining complex software systems, including real-time or data-intensive applications Experience implementing algorithms and working with large data sets Experience with software testing, debugging, and performance optimization Experience working with software development methodologies and best practices Desired Qualifications Experience with Digital Signal Processing (DSP) or Radio Frequency (RF) systems Experience working in distributed or high-performance computing environments Experience leading technical teams or mentoring junior engineers

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