Senior Python Developer

Python Developer

Onsite - 3 or 4 days per week / Sparta, NJ

Perm Role

Our client is looking for a Software Developer to help drive the Python/Django systems that power their business — billing, customer accounts, payments, and service management.

You'll work on a small, senior development team, with the scope to shape architecture, mentor early-career engineers, and take the lead on both internal and external systems.

Key Responsibilities:

• Architect and own significant portions of our backend systems, from design through production
• Lead technical decision-making on new features, integrations, and system improvements
• Mentor and review the work of early-career developers; raise the team's overall code quality bar
• Drive engineering best practices — testing standards, CI/CD, code review discipline
• Own resolution of complex, ambiguous production issues, including in code you didn't write
• Partner directly with leadership on technical roadmap, prioritization, and trade-offs
• Evaluate and integrate third-party APIs and internal system integrations
• Drive database design and query/performance optimization across PostgreSQL and SQL systems
• Model effective use of AI coding tools (Copilot, Claude, Cursor) and help the team implement similar tools

Skills & Qualifications:

• 7+ years of professional software development experience
• Strong command of Python and Django (or a comparable web framework) in a production environment
• Deep working knowledge of SQL and relational databases, PostgreSQL preferred — schema design, query optimization
• Strong understanding of REST API design, integration patterns, and system architecture trade-offs
• Demonstrated ability to independently troubleshoot and resolve complex production issues
• Strong Git workflows and code review discipline
• Comfortable with Docker and Linux environments, including deployment pipelines
• Track record of technical mentorship or informal leadership
• Regular, effective use of AI coding tools to accelerate development without sacrificing quality

Preferred Skills & Qualifications:

• Experience with billing or payment systems in production
• Exposure to Celery/RabbitMQ or other background-task/async systems
• PostgreSQL/PostGIS experience
• Microsoft SQL Server experience
• ASP.NET MVC exposure
• React or other frontend framework experience
• Ownership of CI/CD pipelines and deployment processes
• Competitive programming, hackathons, or open-source contributions