ZipRecruiter

Log In

1

Senior Python Software Engineer Jobs in Fairfax, VA

ManTech International

Python Software Developer

Herndon, VA · On-site

$114K - $190K/yr

MANTECH seeks a driven and mission-focused Python Software Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

ManTech

Python Software Developer

Herndon, VA · Remote

$141K - $236K/yr

MANTECH seeks a driven and mission-focused Python Software Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

ManTech International

Python Software Developer

Herndon, VA · On-site

$141K - $236K/yr

MANTECH seeks a driven and mission-focused Python Software Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

ManTech

Python Software Developer

Herndon, VA · Remote

$114K - $190K/yr

MANTECH seeks a driven and mission-focused Python Software Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

BTree Solutions, Inc.

SR. PYTHON DEVELOPER

Reston, VA · On-site

$126K - $170K/yr

Job Title: SR. PYTHON DEVELOPER Location: Reston,VA Duration: 12+ Months Visa: USC, GC, H1B and EAD Contract Type: W2 Development : * Python Developer with experience in Java as a plus. * Proficient ...

Skyline Scientific Inc

Software Engineer, Senior

Mclean, VA · On-site

$124K - $163K/yr

Software Engineer, Senior JOB SUMMARY Are you looking for more than just a seat on a contract? Are ... Skyline Scientific is looking for a strong Python software engineer who is excited to work on ...

Skyline Scientific Inc

Software Engineer, Senior

Mclean, VA · On-site

$124K - $163K/yr

Software Engineer, Senior JOB SUMMARY Are you looking for more than just a seat on a contract? Are ... Skyline Scientific is looking for a strong Python software engineer who is excited to work on ...

eSolutionsFirst, LLC

Sr. Python Developer

Mclean, VA · On-site

$51.50 - $71/hr

Master s degree or foreign equivalent degree in Computer Science, Software Engineering or related ... Python, Python web technologies, e.g. Flask, Dash * Python data processing technologies, e.g.

Palnar

Sr. Python Developer

Mclean, VA · On-site

$123K - $166K/yr

Design, develop and support software solution for the given requirements within the financial ... Engineering or related technical field Demonstrated knowledge of: * Python, Pandas and other ...

EDCLUB, INC

Senior Software Engineer - Python

Rockville, MD · On-site +1

$124K - $164K/yr

... Software Engineer to join our agile and exceptionally talented engineering team. As a Senior ... Having extensive Python + Django experience is required. The project is unique as it is a well ...

next page

Showing results 1-20

All JobsPython Software Engineer JobsSenior Python Software Engineer JobsSenior Python Software Engineer Jobs in Fairfax, VA

Senior Python Software Engineer information

See Fairfax, VA salary details

$56.2K

$145.1K

$199.3K

How much do senior python software engineer jobs pay per year?

As of Jul 14, 2026, the average yearly pay for senior python software engineer in Fairfax, VA is $145,123.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,200.00 and $167,100.00 per year, depending on experience, location, and employer.

What is the difference between Senior Python Software Engineer vs Python Developer?

AspectSenior Python Software EngineerPython Developer
Required CredentialsBachelor's degree in CS or related field, experience in software engineeringBachelor's degree in CS or related field, coding proficiency
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing applications, debugging
Employer & Industry UsageTech companies, startups, enterprise softwareWeb development, data analysis, automation projects
Common Search & Comparison IntentUnderstanding senior-level roles, responsibilities, and skillsEntry to mid-level coding roles, project involvement

The main difference between a Senior Python Software Engineer and a Python Developer lies in experience, responsibilities, and scope. Senior engineers typically lead projects, design system architecture, and mentor junior staff, while Python Developers focus on coding, application development, and implementation. Both roles require strong Python skills and relevant credentials, but senior roles demand more experience and leadership capabilities.

What are some common challenges faced by Senior Python Software Engineers when leading complex projects, and how can they be addressed?

Senior Python Software Engineers often face challenges such as balancing hands-on coding with mentoring junior team members, managing technical debt, and designing scalable solutions. Successfully addressing these challenges involves clear communication, proactive code reviews, and effective prioritization of tasks. Collaborating closely with cross-functional teams and fostering a culture of knowledge sharing can also help ensure project success and team growth.

What are the key skills and qualifications needed to thrive as a Senior Python Software Engineer, and why are they important?

To thrive as a Senior Python Software Engineer, you need advanced proficiency in Python programming, strong problem-solving abilities, and a solid background in computer science or a related field. Familiarity with frameworks like Django or Flask, experience with version control systems such as Git, and knowledge of cloud platforms and CI/CD tools are typically required. Leadership, effective communication, and mentorship skills help you collaborate with teams and guide junior developers. These skills ensure the delivery of robust, scalable software solutions and foster a productive, innovative development environment.

What does a Senior Python Software Engineer do?

A Senior Python Software Engineer designs, develops, tests, and maintains complex software applications using the Python programming language. They often lead or mentor junior developers, architect software solutions, and ensure best coding practices are followed. These professionals collaborate with cross-functional teams to deliver scalable and efficient systems, troubleshoot issues, and optimize application performance. Their expertise includes advanced knowledge of Python frameworks, libraries, and development tools, as well as experience with databases, APIs, and cloud services.
What are popular job titles related to Senior Python Software Engineer jobs in Fairfax, VA? For Senior Python Software Engineer jobs in Fairfax, VA, the most frequently searched job titles are:
What job categories do people searching Senior Python Software Engineer jobs in Fairfax, VA look for? The top searched job categories for Senior Python Software Engineer jobs in Fairfax, VA are:
What cities near Fairfax, VA are hiring for Senior Python Software Engineer jobs? Cities near Fairfax, VA with the most Senior Python Software Engineer job openings:
Senior Python Software Engineer jobs near you

Python Engineer (2x week on-site) with Security Clearance

Kforce Federal Solutions

Quantico, VA • On-site

Other

Re-posted 6 days ago

Job description

Job Title: Senior Python Engineer
Location: Quantico, VA (On-site) Overview:
A mission-focused organization is seeking a Senior Python Engineer to support the modernization and sustainment of a secure enterprise technology environment. This role contributes to the development of scalable, secure applications and infrastructure supporting critical operational systems. The engineer will work within a collaborative, Agile team to deliver high-quality solutions that align with evolving technical and security requirements.
Key Responsibilities:
Development & Engineering Design, develop, test, and maintain Python-based applications and services supporting enterprise systems
Write clean, maintainable, and efficient code aligned with established engineering standards and best practices
Implement enhancements and new capabilities based on evolving requirements and stakeholder feedback Security & Compliance Ensure applications and code adhere to secure coding standards and established compliance requirements
Participate in code reviews and security-focused evaluations to identify and mitigate potential vulnerabilities
Support the implementation and enforcement of security controls, policies, and procedures across supported systems Collaboration & Delivery Partner with software engineers, cybersecurity professionals, and program teams to deliver reliable solutions
Participate in design and architecture discussions to improve system scalability, performance, and security
Provide technical guidance and mentorship to junior team members when needed Testing & Quality Assurance Develop and maintain unit and integration tests to ensure application reliability and performance
Troubleshoot, debug, and resolve technical issues in a timely manner
Contribute to automated testing efforts and continuous integration workflows to improve delivery efficiency Documentation Create and maintain technical documentation, including code, APIs, and system design artifacts
Document development processes, procedures, and system configurations to support long-term maintainability
Ensure documentation remains accurate, clear, and up to date Continuous Improvement Stay current with emerging Python technologies, tools, and development practices
Identify opportunities to improve system performance, security posture, and overall user experience
Actively participate in Agile ceremonies such as sprint planning, stand-ups, and retrospectives Required Qualifications: Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent experience)
Active TS/SCI clearance
IAT Level II certification (e.g., Security+)
3–5 years of hands-on experience developing Python-based applications, ideally in secure or regulated environments
Strong proficiency with Python and familiarity with common frameworks (e.g., Flask, Django)
Experience developing and integrating APIs
Knowledge of secure coding practices, authentication methods, and data protection principles
Experience with version control systems such as Git
Familiarity with relational databases and ORM frameworks Preferred Qualifications: Experience supporting systems within highly regulated or mission-driven environments
Exposure to Agile or DevSecOps practices
Additional certifications in software development, cybersecurity, or Python-related technologies

Apply