Job Description

Senior Python Developer
Location:  Herndon/Chantilly, VA
Clearance Required:  TS/SCI with Full Scope Polygraph (FSP)
Position Type:  Full-Time, On-Site
Salary Range:  $230,000 – $250,000

We are seeking an experienced and dedicated  Senior Python Developer  to lead the development and architectural design of advanced data processing applications in support of a high-impact federal mission. The ideal candidate will be responsible for designing software components, overseeing technical implementations, and contributing to full lifecycle development within an Agile, cloud-native environment.

Primary Responsibilities:

• Collaborate with the Chief Engineer and Technical Leads to translate mission requirements into user stories and scalable software solutions.
• Lead the design and development of core software components for Python-based data processing applications.
• Drive work decomposition and contribute to architectural design as part of a broader software engineering effort.
• Implement automated test frameworks (e.g., PyTest) to ensure high-quality, reliable CI/CD pipelines.
• Develop robust web APIs using FastAPI to interface with cloud-hosted applications and relational or non-relational databases.
• Integrate and optimize Python code within Docker containers in a distributed, containerized architecture.
• Work in Agile development cycles, guiding team collaboration and iterative software delivery.
• Engage directly with customer stakeholders to define technical requirements and align on implementation strategies.
• Mentor junior developers and support ongoing process improvement in the development pipeline.

Requirements

Minimum Qualifications:

• 7+ years of professional experience in Python development and data processing.
• Deep expertise with Python data processing libraries such as  PySpark, Pandas, and NumPy .
• Strong experience with API development using  FastAPI or similar frameworks.
• Proficiency in test-driven development using  PyTest and mocking libraries.
• Advanced understanding of cloud-native software architectures and containerized deployment models.
• Proven ability to independently design software components based on mission requirements.
• Excellent communication skills, with experience leading technical discussions and stakeholder engagement.
• Bachelor's Degree

Preferred Qualifications:

• Experience with Python ORM libraries such as  SQLAlchemy .
• Familiarity with  deploying containerized Python applications using Docker on AWS or other cloud platforms.

Eligibility:

• Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.
• Active  TS/SCI with Full Scope Polygraph (FSP)clearance is required for this role.

Benefits

Compensation:

Salary for this position is determined by various factors, including but not limited to location, the candidate’s particular combination of knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements.

Proposed Salary Range:  $230,000 – $250,000

Benefits:

Our client offers a comprehensive and competitive benefits package, which includes:

• 100% Company-Paid Health Insurance: Complete coverage for medical, dental, and vision premiums for employees and their dependents through United Healthcare and Guardian.
• Fully Paid Protection Plans: Life insurance, short-term disability, and long-term disability provided at no cost to the employee.
• 401(k) Retirement Contribution: 15% of salary contributed by the company through Guideline, disbursed bi-monthly, with immediate full vesting.
• Paid Time Off: 200 hours of annual PTO, accrued per pay period, in addition to 11 federal holidays.
• Incentive Bonuses: Recruitment and business development bonuses to reward contributions to company growth and success.

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