Python Software Engineer (Performance Optimization) – On Site in McLean, VA

Work Authorization: We are unable to consider candidates who require F-1 OPT/CPT, H-1B sponsorship, or any employer-sponsored work authorization now or in the future. If you enjoy writing clean, efficient code and genuinely care about how systems behave under real workloads, this is the kind of role where you will thrive. We are a small, highly technical engineering team that values clarity, correctness, and thoughtful problem-solving.

Our environment is calm, stable, and built around long-term engineering quality rather than short-term pressure. If you are coming from a chaotic workplace or a job filled with constant churn, you will immediately notice the difference here. This is the kind of role where you can go deep, work closely with senior engineers, and focus on building software that is fast, reliable, and built to last.

What You Will Do • Build, improve, and maintain high-performance internal software tools • Write clean, production-quality Python applications in a Linux environment • Use and expand your R skills to improve performance, scalability, and correctness • Profile and tune systems to make them faster and more efficient • Participate in architecture discussions and performance-focused design reviews • Work with MySQL and related data systems to support stable and predictable workflows What You Bring • 2 or more years of hands-on, post-college production-level Python engineering experience • 1+ years working with R (or C), ideally including optimization or tuning • Proven ability to write and deploy production-ready code • Strong understanding of algorithms, data flow, and system performance • Comfortable working in Linux environments and using Git for version control • A clear, thoughtful communication style and willingness to collaborate • Experience with SQL, ETL, or data integrations is a plus Why You'll Love Working Here • Stable, well-established company with a long-term engineering focus • A mentoring-oriented culture where senior engineers actively help you grow • A calm, respectful environment that values correctness over rushing • Interesting work that involves real performance challenges and deep thinking • A codebase that is maintained with care and not pushed to meet unrealistic deadlines • Competitive salary, strong benefits, and real work–life balance • On-site for collaboration, only in McLean, Virginia (no remote or hybrid options) Who This Role Is Perfect For This position is ideal for engineers who: • Enjoy optimization, profiling, and understanding how systems behave under the hood • Prefer a stable, predictable engineering environment instead of constant fire drills • Value working with experienced developers who take code quality seriously • Want to do meaningful technical work without unhealthy pressure • Appreciate a team that cares about craftsmanship, clarity, and long-term maintainability