Senior Python Software Engineer

Zip Staff Inc. is hiring a contract Senior Python Software Engineer for the Checkmate platform in Tysons, VA.

Responsibilities

• Refactor and modernize components within a financial forecasting and accounting application
• Design and develop new custom components and integrate them into the Checkmate platform
• Lead heavy integration work across data, services, and application layers
• Build clean, maintainable, production-grade Python using strong Object-Oriented Programming practices
• Develop and maintain automated unit and integration tests using pytest or equivalent
• 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

Requirements

• Minimum 5 years of hands-on production-grade Python software engineering experience; scripting or automation-only backgrounds will not be considered
• Strong OOP skills in Python
• Experience with unit testing and automated test frameworks; 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

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 with high accuracy and reliability requirements

Technology stack

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

Job details

• Location: Tysons, VA (onsite)
• Employment type: contract
• Pay: USD 70–72 per hour

Benefits

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

Interview process

• Candidates must demonstrate strong live coding and technical depth during the on-site interview
• 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 OOP experience in Python along with unit testing using frameworks such as pytest?