Developer Jobs in Tysons, VA

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Senior Python Software Engineer

Zip Staff Inc. Tysons, VA

Tysons, VA

Today

$70 - $72/hr Contract Backend Developer Python Senior

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Job Description

Work on mission-critical forecasting and accounting

Zip Staff Inc. is hiring a Senior Python Software Engineer for an onsite contract role in Tysons, VA (about 70 to 72 USD per hour). You will join a financial forecasting and accounting platform team building and improving capabilities on the Checkmate platform. The work is hands-on and production-focused, including refactoring existing components, creating new custom components, and performing deep integration and testing across data and application layers.

Responsibilities

Refactor and modernize components of a financial forecasting and accounting application
Design and develop new custom components and integrate them into the Checkmate platform
Carry out heavy integration across data, services, and application layers
Write clean, maintainable, production-grade Python using strong Object-Oriented Programming (OOP) practices
Build and maintain automated unit and integration tests using pytest or an equivalent framework
Support critical production runs, troubleshoot issues, and help ensure accuracy and reliability of outputs
Collaborate with stakeholders and team members to analyze requirements and deliver end-to-end solutions
Participate in code reviews, design discussions, and continuous improvement of engineering practices

What you’ll bring

5+ years of hands-on production-grade Python engineering (automation-only or scripting-only backgrounds will not be considered)
Strong OOP skills in Python
Solid experience with unit testing and automated test frameworks, with pytest strongly preferred
Experience using Git in a team-based development environment
Strong SQL and relational database skills
Ability to write clean, testable, high-quality code and work in an Agile environment
Excellent problem-solving and communication skills
Ability to work onsite in Tysons, VA

Tools and technologies

Python, pytest, Git, SQL, Docker/Kubernetes, Pandas

Preferred qualifications

Experience with Pandas
Familiarity with containerization technologies such as Docker/Kubernetes
Exposure to financial forecasting, fixed income concepts, or accounting systems
Experience supporting production systems where accuracy and reliability requirements are high

Benefits

401(k)
401(k) matching
Paid time off
Referral program

Interview process

On-site interview with live coding and demonstration of technical depth
In person interview

Application questions

Are you legally authorized to work in the United States?
Will you now or in the future require employer sponsorship for employment authorization?
Do you have strong Object-Oriented Programming (OOP) experience in Python along with unit testing using frameworks such as pytest?

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