Senior Backend Engineer (Python / API Development)

Company: S3
Location: Charlotte
Posted on: April 2, 2026

Job Description:

Job Description Senior Backend Engineer (Python / API Development) Charlotte, NC (Hybrid – 3 Days Onsite: Mon/Tue/Thurs) Contract: 12 Months (Potential Extension/Conversion) Rate: $57/hr Overview We are seeking a highly hands-on Backend Engineer with strong Python expertise to design, build, and scale modern API-driven services within a large enterprise environment. This role is ideal for an engineer who thrives on ownership, writes clean and scalable code, and enjoys working in a fast-paced, collaborative setting with a strong emphasis on continuous learning and innovation. Key Responsibilities Design, develop, and maintain Python-based backend services with a focus on performance and scalability Build and support RESTful APIs , leveraging frameworks such as FastAPI Apply strong object-oriented design principles to develop maintainable and extensible systems Own features end-to-end, from design through implementation, testing, and support Collaborate closely with cross-functional teams in a hybrid environment Leverage AI-assisted development tools (e.g., GitHub Copilot) to enhance productivity Continuously evaluate and adopt new tools, frameworks, and best practices Required Qualifications 4 years of backend or software engineering experience Strong proficiency in Python (most critical skill) Experience building and consuming REST APIs Solid understanding of object-oriented programming (OOP) principles Experience working in Agile or fast-paced development environments Strong problem-solving skills and ability to take ownership of deliverables Preferred Qualifications Experience with FastAPI or similar Python frameworks (Flask, Django) Exposure to AI/ML tools or concepts Experience working in financial services or regulated environments Familiarity with database design , querying, and performance optimization Ability to contribute to light front-end/UI development when needed Work Environment Hybrid schedule: 3 days onsite in Charlotte (Mon/Tue/Thurs) Collaborative, execution-focused team Strong emphasis on learning, experimentation, and modern engineering practices

Keywords: S3, Columbia , Senior Backend Engineer (Python / API Development), IT / Software / Systems , Charlotte, South Carolina