Senior Software Engineer-Algorithm Developer

We are seeking an experienced Senior Software Engineer with a strong background in algorithm design, optimization, and implementation using C++, Fortran, Python, and MATLAB. The ideal candidate excels at solving complex technical challenges, designing efficient software architectures, and working collaboratively within cross‑functional engineering teams.

• Design, develop, and optimize algorithms for complex software systems.
• Implement high‑performance, reliable, and maintainable code using modern standards.
• Analyze system requirements to architect scalable algorithmic solutions.
• Profile and optimize existing algorithms for speed, accuracy, and resource usage.
• Integrate software components written in multiple programming languages, ensuring seamless interoperability and consistent functionality across C++, Python, MATLAB, and legacy codebases.
• Collaborate with systems engineers, domain experts, and other software developers to integrate algorithms into larger applications.
• Write unit tests, participate in code reviews, and ensure code quality across the software lifecycle.
• Document algorithmic approaches, assumptions, and performance metrics.
• Troubleshoot and resolve technical issues in both new and legacy codebases.

US citizenship and an Active Security Clearance is required

• Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, or related field.
• 7+ years of professional software engineering experience.
• Strong expertise in modern C++ (including templates, STL, memory management, and object‑oriented design), with additional professional experience in Python, MATLAB, and Fortran.
• Demonstrated experience developing and implementing complex algorithms.
• Skilled in debugging, profiling, performance tuning, and code optimization.
• Experience with version control systems such as Git.
• Ability to work independently on technically challenging problems and contribute within a collaborative team setting.
• Strong analytical, mathematical, and problem‑solving skills.

• Master's or PhD in a technical field related to algorithms or software engineering.
• Experience with real‑time systems or high‑throughput data processing.
• Knowledge of numerical methods, signal processing, or related algorithmic domains.
• Experience modernizing or integrating legacy Fortran‑based algorithms into contemporary software systems.
• Familiarity with CI/CD pipelines, Dev Sec Ops , containerization, or automated testing frameworks.
• Experience with Linux development environments.

• Starting PTO accrual of 20 days PTO/year + 10 holidays/year
• Flexible schedules
• 6% 401(k) match with immediate vesting up to $9k annually
• Semi‑annual bonus eligibility (July and December)
• Company‑funded Employee Stock Ownership Plan (ESOP)
• Up to $10,000 in annual educational reimbursement
• Other company‑funded benefits, like life and disability insurance
• Optional zero deductible Blue Cross/Blue Shield health insurance plan

Modern Technology Solutions, Inc. (MTSI) is a 100% employee‑owned engineering services and solutions company that provides high‑demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance.

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit

MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.