Python Backend Developer

Valiant Technologies LLC; Phoenix (AZ); On-site; USD 84,000 - 120,000; Full time

Job summary

Valiant Technologies LLC is seeking an experienced Python Backend Developer to design, build, and maintain scalable backend applications and services in Phoenix. The role emphasizes strong Python skills, RESTful APIs, and PostgreSQL, with experience in asynchronous processing and distributed systems.

You will proactively troubleshoot, own deliverables, and contribute to technical improvements, collaborating with cross-functional teams and supporting CI/CD, containerization, and cloud

Qualifications

• 8+ years of experience in Python backend development.
• Strong proficiency in Python, object-oriented programming, and asynchronous programming.
• Hands-on experience with Flask, FastAPI, or Django.
• Strong knowledge of RESTful APIs and backend services.
• Experience with PostgreSQL, SQL queries, database design, and optimization.
• Experience with API integrations, authentication, logging, and error handling.
• Understanding of asynchronous processing and distributed systems.
• Experience with Pytest or unittest for unit and integration testing.
• Proficiency in Git, pull requests, and code review workflows.
• Strong debugging, analytical, and problem-solving skills.

Responsibilities

• Design, develop, and maintain backend applications and RESTful APIs using Python.
• Build scalable backend services using Flask, FastAPI, or Django.
• Develop and optimize SQL queries, database schemas, and performance for PostgreSQL.
• Implement API integrations, authentication, error handling, logging, and troubleshooting.
• Develop asynchronous processes, background jobs, and distributed services.
• Write and maintain unit and integration tests.
• Collaborate with cross-functional teams through Git, pull requests, and code reviews.
• Support CI/CD pipelines, containerization, and cloud deployments.
• Investigate technical issues and implement reliable, secure solutions.
• Explore AI integrations, MCP, and AI-driven workflow automation where applicable.

Skills

Python backend development

Asynchronous programming

RESTful APIs

Unit testing (pytest/unittest)

Git & code reviews

Debugging & problem-solving

Tools

Flask

FastAPI

Django

PostgreSQL

Pytest

Git

CI/CD tooling

Docker

Kubernetes

Temporal

Apache Airflow

Celery

Job description

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

Job Title:Python Backend Developer

Location:Phoenix, AZ

Duration: 8 Months + Extension

Bill Rate: $74/hour (C2C)

Job Type: W-2, 1099, C2C

Client: To Be Discussed Later

Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-4-EAD, Other

Job Description:

We are seeking an experienced Python Backend Developer to design, develop, and maintain scalable backend applications and services. The ideal candidate will have strong expertise in Python, RESTful APIs, relational databases, asynchronous programming, and distributed systems.

The candidate should be proactive, self-driven, and capable of independently troubleshooting issues, taking ownership of deliverables, and contributing to technical improvements.

Key Responsibilities:

• Design, develop, and maintain backend applications and RESTful APIs using Python.
• Build scalable backend services using Flask, FastAPI, or Django.
• Develop and optimize SQL queries, database schemas, and performance for PostgreSQL.
• Implement API integrations, authentication, error handling, logging, and troubleshooting.
• Develop asynchronous processes, background jobs, and distributed services.
• Write and maintain unit and integration tests.
• Collaborate with cross-functional teams through Git, pull requests, and code reviews.
• Support CI/CD pipelines, containerization, and cloud-based deployments.
• Investigate technical issues and implement reliable, secure solutions.
• Explore AI integrations, MCP, and AI-driven workflow automation where applicable.

Required Skills:

• 8+ years of experience in Python backend development.
• Strong proficiency in Python, object-oriented programming, and asynchronous programming.
• Hands‑on experience with Flask, FastAPI, or Django.
• Strong knowledge of RESTful APIs and backend services.
• Experience with PostgreSQL, SQL queries, database design, and optimization.
• Experience with API integrations, authentication, logging, and error handling.
• Understanding of asynchronous processing and distributed systems.
• Experience with Pytest or unittest for unit and integration testing.
• Proficiency in Git, pull requests, and code review workflows.
• Strong debugging, analytical, and problem‑solving skills.

Preferred Skills:

• Workflow orchestration tools such as Temporal, Apache Airflow, or Celery.
• WebSockets, Socket.IO, or real‑time communication technologies.
• Docker, Kubernetes, CI/CD pipelines, and cloud deployments.
• OAuth 2.0, JWT, microservices architecture, and secure API development.
• AI integrations, Model Context Protocol (MCP), and AI‑driven workflow automation.

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.