Senior Python Developer - Build APIs & Async Workflows

Emergn; Greater London; Remote; GBP 38,000 - 55,000; Full time

Benefits offered by this job

Health and life insurance

Flexible work model

Mac or Windows choice

Educational programs and certification

Job summary

Emergn seeks a Senior Python Developer to own a business-critical Python platform and help it grow. You will develop backend services and APIs using Python and Flask, and work with MongoDB, Celery, and data tools in a fast-moving, collaborative setting.

You’ll join an international team based in Portugal, contributing to end-to-end solutions, improving code quality, and leveraging AI tools to boost productivity. The role emphasizes learning, growth, and delivering impact.

Qualifications

• 4+ years of professional Python development experience.
• Strong knowledge of Python Fundamentals and advanced concepts.
• Hands-on experience building REST APIs with Flask.
• Experience with background jobs and asynchronous processing using Celery and RabbitMQ.
• Hands-on experience with MongoDB (PyMongo).
• Experience writing automated tests and working with Git and CI/CD pipelines.

Responsibilities

• Develop and maintain backend services and APIs using Python and Flask.
• Understand and extend an existing, complex application without breaking existing functionality.
• Design and implement asynchronous processing and background job workflows using Celery and RabbitMQ.
• Work with MongoDB and process data using Pandas and NumPy.
• Debug, troubleshoot, and resolve application issues.
• Maintain code quality through automated tests, PRs, and code reviews.
• Maintain and improve CI/CD pipelines with GitHub Actions.
• Collaborate with product, frontend, and DevOps teams to deliver end-to-end solutions.
• Use GitHub Copilot and other AI tools to work more effectively.
• Fill documentation gaps and contribute to technical best practices.

Skills

Python

Flask

REST APIs

Celery

MongoDB

PyMongo

Git

GitHub Actions

Agile/Scrum

Tools

MongoDB

RabbitMQ

Pandas

NumPy

Job description

Emergn seeks a Senior Python Developer to own a business-critical Python platform and help it grow. You will develop backend services and APIs using Python and Flask, and work with MongoDB, Celery, and data tools in a fast-moving, collaborative setting.

You’ll join an international team based in Portugal, contributing to end-to-end solutions, improving code quality, and leveraging AI tools to boost productivity. The role emphasizes learning, growth, and delivering impact.