Backend Python Developer

Ethereum Technologies LLC; Phoenix (AZ); On-site; USD 83,000 - 118,000; Full time

Job summary

Ethereum Technologies is seeking an experienced Python Backend Developer in Phoenix, AZ to lead backend development, API engineering, and scalable solutions. You will design and implement RESTful services using Flask, FastAPI, or Django, with PostgreSQL and distributed architectures.

The ideal candidate has strong async programming skills, experience with microservices, and familiarity with Docker, Kubernetes, and CI/CD pipelines.

Qualifications

• 8+ years of Python backend development experience.
• Strong Python proficiency including async programming.
• Experience building RESTful APIs with Flask, FastAPI, or Django.
• Solid PostgreSQL knowledge and query optimization.
• Experience with API integrations, auth, logging, and observability.
• Familiarity with Temporal, Airflow, or Celery for workflows.
• Real-time comms via WebSockets/Socket.IO.
• Experience writing unit and integration tests (Pytest, unittest).
• Git workflows, PR reviews, and collaboration.

Responsibilities

• Design and maintain scalable backend apps, services, and APIs in Python.
• Develop RESTful APIs with Flask/FastAPI/Django.
• Optimize PostgreSQL schemas and queries.
• Implement secure authentication, logging, and error handling.
• Support async processing and distributed workflows.
• Work with Docker, Kubernetes, and CI/CD for deployment.
• Contribute to testing strategy and automation.

Skills

Python backend

Flask

FastAPI

Django

PostgreSQL

Asynchronous programming

Microservices

REST APIs

OAuth 2.0

JWT

Docker

Kubernetes

Git & PR workflows

CI/CD

WebSockets / Socket.IO

Unit & Integration tests

Celery / Airflow / Temporal

AI integration (MCP)

Tools

Flask framework

FastAPI

Django

PostgreSQL

Temporal

Airflow

Celery

WebSocket tech

Docker

Kubernetes

Git

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.