Backend Python Developer

Quantum Technologies LLC; Phoenix (AZ); On-site; USD 101,000 - 127,000; Full time

Job summary

Quantum Technologies. LLC is seeking an experienced Backend Python Developer in Phoenix, AZ, to design, build, and scale robust backend services and APIs.

The role emphasizes Python expertise with Flask, FastAPI, Django, and PostgreSQL, plus modern backend patterns like asynchronous processing and microservices. The ideal candidate will own API development, data modeling, and secure integrations, while contributing to CI/CD, containerization, and real-time features using WebSockets.

Qualifications

• 8+ years of professional Python backend development.
• Experience with RESTful APIs using Flask, FastAPI, or Django.
• Strong PostgreSQL knowledge and query optimization.
• Experience with authentication, logging, and error handling in backend services.
• Familiarity with workflow orchestration frameworks such as Temporal, Apache Airflow, or Celery.
• Exposure to real‑time communication technologies (WebSockets, Socket.IO).
• Experience with Git, PRs, branching strategies, and code reviews.
• Knowledge of Docker, Kubernetes, CI/CD and cloud deployments.
• Understanding of OAuth 2.0, JWT, and microservices architecture.
• Exposure to AI integrations (MCP) is a plus.

Responsibilities

• Design, develop, and maintain scalable backend applications and APIs with Python.
• Build RESTful APIs using Flask, FastAPI, or Django and optimize PostgreSQL schemas and queries.
• Develop backend integrations with internal/external systems with secure auth, logging, and monitoring.
• Implement asynchronous programming and distributed workflows for high-volume apps.
• Implement workflow orchestration using Temporal, Airflow, or Celery.
• Enable real-time features with WebSockets/Socket.IO and ensure testing.
• Collaborate via Git workflows, PRs, and code reviews; contribute to CI/CD pipelines.
• Containerize apps with Docker, orchestrate with Kubernetes, and support deployment/release management.
• Adopt secure API practices (OAuth2.0, JWT) and plan AI-driven workflow automation.

Skills

Python

Async programming

REST APIs

Flask

FastAPI

Django

PostgreSQL

Docker

Kubernetes

CI/CD

Git

WebSockets

Socket.IO

Temporal

Airflow

Celery

Tools

Temporal

Apache Airflow

Celery

WebSockets

Socket.IO

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Job Title

Backend Python Developer

Location

Phoenix, AZ

Duration

8 Months + Extension

Bill Rate

$73/hour (C2C)

Job Type

W-2, 1099, C2C

Client

To Be Discussed Later

Work Authorization

US Citizen, Green Card, OPT-EAD, CPT, H4-EAD, Other

Job Description

We are seeking an experienced Python Backend Developer with hands‑on experience in backend development, API engineering, and building scalable application solutions.

The ideal candidate will have strong expertise in Python, Flask, FastAPI, Django, and PostgreSQL, along with a solid understanding of asynchronous programming, distributed systems, and microservices architecture.

Key Responsibilities

• Design, develop, and maintain scalable backend applications, services, and APIs using Python.
• Build and enhance RESTful APIs using Python frameworks such as Flask, FastAPI, and Django.
• Design and optimize database schemas, SQL queries, and data access operations using PostgreSQL.
• Develop backend integrations with internal and external systems, implementing secure authentication, error handling, logging, and monitoring.
• Implement asynchronous programming, background processing, and distributed workflows to support high-volume applications.
• Develop and maintain workflow orchestration and task execution solutions using technologies such as Temporal, Apache Airflow, or Celery.
• Implement real‑time communication capabilities using WebSockets, Socket.IO, and related technologies.
• Develop and maintain automated unit and integration tests to ensure application quality, reliability, and performance.
• Collaborate with development teams through Git-based workflows, pull requests, and code reviews.
• Support application containerization, deployment, and release management using Docker, Kubernetes, and CI/CD pipelines.
• Implement secure backend solutions using OAuth 2.0, JWT, and microservices-based architecture.
• Explore and integrate AI capabilities, Model Context Protocol (MCP), and AI‑driven workflow automation into backend applications.
• Troubleshoot complex backend issues, identify performance bottlenecks, and implement effective technical solutions.
• Take ownership of development deliverables, contribute to technical improvements, and ensure timely delivery of high‑quality solutions.

Required Qualifications

• 8+ years of professional experience in Python backend development and software engineering.
• Strong proficiency in Python, including object‑oriented programming, asynchronous programming, and backend application development.
• Hands‑on experience developing RESTful APIs and backend services using Flask, FastAPI, or Django.
• Strong knowledge of PostgreSQL, including SQL queries, database design, and performance optimization.
• Experience with API integrations, authentication mechanisms, error handling, logging, and backend troubleshooting.
• Good understanding of asynchronous processing, background jobs, and distributed systems architecture.
• Experience or familiarity with workflow orchestration frameworks such as Temporal, Apache Airflow, or Celery.
• Exposure to real‑time communication technologies such as WebSockets and Socket.IO.
• Experience writing unit and integration tests using Pytest, unittest, or equivalent testing frameworks.
• Hands‑on experience with Git, pull requests, branching strategies, and collaborative code review practices.
• Knowledge of CI/CD pipelines, Docker, Kubernetes, and cloud‑based application deployments.
• Familiarity with OAuth 2.0, JWT, microservices architecture, and secure API development.
• Exposure to AI integrations, Model Context Protocol (MCP), and AI‑powered workflow automation is an added advantage.
• Strong analytical, debugging, and problem‑solving skills, with the ability to independently investigate and resolve technical challenges.
• Proactive and self‑driven, with a strong sense of ownership, accountability, adaptability, and willingness to learn new technologies.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.