Senior Python Backend Engineer (Django/Flask/FastAPI)

Quantum Technologies. LLC; Richmond (VA); On-site; USD 90,000 - 120,000; Full time

Job summary

Quantum Technologies LLC is seeking an experienced Python Developer to design, build, test, and maintain scalable software applications. The role focuses on backend services, RESTful APIs, and robust data access using modern frameworks and cloud platforms.

You will design and implement APIs with Django, Flask, or FastAPI, write clean code, and ensure security, testing, and performance. Collaboration with QA, DevOps, and analysts is essential.

Qualifications

• Strong programming experience in Python 3.x.
• Knowledge of object-oriented programming, data structures, algorithms, and design patterns.
• Experience with Django, Flask, or FastAPI.
• Hands-on experience developing REST APIs and web services.
• Proficiency in SQL and databases such as PostgreSQL, MySQL, or Oracle.
• Knowledge of ORM frameworks such as SQLAlchemy or Django ORM.
• Experience with Git, Linux, and development tools.
• Familiarity with testing frameworks such as PyTest or unittest.
• Understanding of HTTP, JSON, API integration, and web application security.
• Knowledge of debugging, logging, and performance optimization.

Responsibilities

• Design, develop, and maintain applications using Python.
• Build backend services and RESTful APIs using Django, Flask, or FastAPI.
• Write clean, reusable, efficient, and maintainable code.
• Integrate applications with relational and NoSQL databases.
• Develop and optimize SQL queries and database operations.
• Implement authentication, authorization, and application security.
• Perform unit testing, debugging, troubleshooting, and code reviews.
• Collaborate with cross-functional teams, including QA, DevOps, and business analysts.
• Develop automated scripts and tools to improve operational efficiency.
• Integrate third-party APIs and external services.
• Use Git for version control and follow Agile development practices.
• Support application deployment, monitoring, and production troubleshooting.
• Optimize application performance, scalability, and reliability.
• Maintain technical documentation and participate in design discussions.

Skills

Python 3.x

REST APIs

Django

Flask

FastAPI

SQL

PostgreSQL

ORM

Git

Linux

PyTest

Tools

SQLAlchemy

Docker

Kubernetes

CI/CD

Job description

Quantum Technologies LLC is seeking an experienced Python Developer to design, build, test, and maintain scalable software applications. The role focuses on backend services, RESTful APIs, and robust data access using modern frameworks and cloud platforms.

You will design and implement APIs with Django, Flask, or FastAPI, write clean code, and ensure security, testing, and performance. Collaboration with QA, DevOps, and analysts is essential.