Senior Python Engineer — Backend Architect & Mentor

Weekday AI; United States; Remote; USD 119,000 - 185,000; Full time

Job summary

Weekday AI is seeking a Senior Software Engineer with deep Python expertise to design and maintain scalable backend systems and APIs. You will lead end-to-end development, shape architectural decisions, and mentor junior engineers in a fast-paced environment.

The role focuses on building robust services with Django/Flask/FastAPI, strong data engineering, and cloud-based deployment. London-based, on-site, with opportunities to collaborate across product and DevOps teams.

Qualifications

• 6–11 years of professional software development experience with Python.
• Strong knowledge of Python frameworks such as Django, Flask, or FastAPI.
• Experience in building RESTful APIs and microservices architecture.
• Hands-on experience with PostgreSQL, MySQL, or MongoDB.
• Familiarity with asynchronous programming and performance optimization techniques.
• Experience with cloud platforms (AWS, GCP, or Azure) and containerization tools like Docker.
• Knowledge of CI/CD pipelines and version control systems such as Git.
• Strong problem-solving skills and the ability to work in a fast-paced environment.

Responsibilities

• Design, develop, and maintain robust, scalable backend systems and APIs using Python.
• Lead end-to-end development of complex software solutions, from concept to deployment.
• Write clean, efficient, and reusable code following best practices and coding standards.
• Collaborate with cross-functional teams including product managers, designers, and DevOps to deliver high-quality features.
• Optimize application performance, reliability, and scalability.
• Participate in architectural discussions and contribute to technical decision-making.
• Conduct code reviews and ensure adherence to quality standards.
• Troubleshoot, debug, and resolve production issues in a timely manner.
• Mentor junior developers and contribute to building a strong engineering culture.

Skills

Python

Django/Flask/FastAPI

RESTful APIs

Data structures & algorithms

Databases (PostgreSQL/MySQL/MongoDB)

Asynchronous programming

Cloud platforms (AWS/GCP/Azure)

Docker

CI/CD & Git

Problem-solving

Tools

Celery

Kafka

Job description

Weekday AI is seeking a Senior Software Engineer with deep Python expertise to design and maintain scalable backend systems and APIs. You will lead end-to-end development, shape architectural decisions, and mentor junior engineers in a fast-paced environment.

The role focuses on building robust services with Django/Flask/FastAPI, strong data engineering, and cloud-based deployment. London-based, on-site, with opportunities to collaborate across product and DevOps teams.