Senior Python Backend Engineer | Lead & Mentor

Weekday AI (YC W21); Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Weekday AI, a client of Weekday's, is seeking a Senior Software Engineer with deep Python expertise to join the London-based engineering team. You will design, develop, and maintain scalable backend systems and APIs while shaping technical architecture and mentoring junior engineers.

The ideal candidate has 6–11 years of professional Python experience with Django/Flask/FastAPI, RESTful APIs, and cloud platforms.

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.
• Solid understanding of data structures and algorithms.
• Hands-on experience with databases such as 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

Microservices

Data structures

Algorithms

PostgreSQL/MySQL/MongoDB

Asynchronous programming

Cloud platforms

Docker

Git & CI/CD

Tools

CI/CD pipelines

Git

Job description

Weekday AI, a client of Weekday's, is seeking a Senior Software Engineer with deep Python expertise to join the London-based engineering team. You will design, develop, and maintain scalable backend systems and APIs while shaping technical architecture and mentoring junior engineers.

The ideal candidate has 6–11 years of professional Python experience with Django/Flask/FastAPI, RESTful APIs, and cloud platforms.