Senior Python Backend Engineer - Cloud, Data & Scale

eSolutionsFirst; McLean (VA); On-site; USD 120,000 - 150,000; Full time

Job summary

eSolutionsFirst is seeking a Senior Python Developer in McLean, Virginia. The successful candidate will be involved in the full software development lifecycle, enhancing and maintaining mission-critical applications. Key responsibilities include building features, code optimization, and application modernization. A minimum of 10 years' backend development experience using Python and a Master’s degree in Computer Science are preferred. The position is full-time and on-site during standard business hours (Monday–Friday).

Qualifications

• 10+ years of backend development experience using Python, including large data libraries.
• Strong understanding of Object-Oriented Programming (OOP).
• Experience working with large-scale databases.

Responsibilities

• Building new features and enhancements.
• Code refactoring and optimization.
• Defect fixes and technical debt remediation.
• Application modernization and migration efforts.
• Performance improvements and scalability initiatives.

Skills

Backend development using Python

Object-Oriented Programming (OOP)

Large-scale databases

Data processing frameworks (e.g., Pandas, NumPy, PySpark)

Cloud platforms (AWS, Azure, or GCP)

Education

Master’s degree in Computer Science

Job description

We are seeking a Senior Python Developer to support the development of mission-critical applications built on modern software development frameworks.

The selected candidate will collaborate with engineering teams to design, develop, enhance, and maintain both customer-facing and internal applications/services. The role involves working across the full software development lifecycle, including server operations, backend development, testing, verification, and maintenance.

The developer will contribute to:

• Building new features and enhancements
• Code refactoring and optimization
• Defect fixes and technical debt remediation
• Application modernization and migration efforts
• Performance improvements and scalability initiatives
  
  

Must-Have Qualifications

• 10+ years of backend development experience using Python, including large data libraries
• Strong understanding of Object-Oriented Programming (OOP)
• Experience working with large-scale databases
• Master’s degree in Computer Science (preferred)
  
  

Preferred Skills (Nice To Have)

• Experience with cloud platforms (AWS, Azure, or GCP)
• Familiarity with RESTful APIs and microservices architecture
• Experience with data processing frameworks (e.g., Pandas, NumPy, PySpark)
• Understanding of CI/CD pipelines and DevOps practices
• Strong problem-solving and analytical skills
  
  

Work Schedule

• Standard business hours
• Full-time, on-site in McLean, VA (Monday–Friday)