Senior Python Backend Engineer - Flexible Hours (Portugal)

Emergn; Portugal; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Flexible work model

Educational programs

Choice of Mac or Windows

Modern technologies

International team

Job summary

Emergn is seeking a Senior Python Developer to own a business-critical Python platform from Portugal. You will develop backend services and APIs with Python/Flask, design async processing with Celery and RabbitMQ, and work with MongoDB.

You will debug issues, improve tests, and contribute to CI/CD and documentation in a collaborative, international team. You have 4+ years of Python experience, Flask REST APIs, MongoDB, and strong English skills, plus familiarity with Git, AWS, and modern

Qualifications

• 4+ years of professional software development with Python as main language.
• Solid knowledge of Python fundamentals and advanced concepts.
• Hands-on experience building REST APIs with Flask.
• Experience with background jobs and asynchronous processing (Celery, RabbitMQ).
• Hands-on MongoDB experience, ideally via PyMongo.
• Experience writing automated tests and safe changes in large codebases.
• Proficient with Git, GitHub, and CI/CD pipelines.
• Experience in Agile/Scrum teams and professional English.

Responsibilities

• Develop and maintain backend services and APIs using Python and Flask.
• Understand complex application behavior and add features without disruption.
• Design and implement asynchronous processing workflows with Celery and RabbitMQ.
• Work with MongoDB and process data using PyMongo, Pandas, and NumPy.
• Debug, troubleshoot, and resolve application issues.
• Maintain code quality with automated tests, PRs, and reviews.
• Keep CI/CD pipelines healthy with GitHub Actions.
• Collaborate with product, frontend, and DevOps teams to deliver end-to-end solutions.
• Contribute to documentation and best practices; explore AI tools to improve productivity.

Skills

Python

REST APIs

Agile/Scrum

English proficiency

CI/CD

Testing

Tools

Flask

Celery

RabbitMQ

MongoDB

PyMongo

Git

GitHub Actions

AWS

Node.js

Vue.js

Job description

Emergn is seeking a Senior Python Developer to own a business-critical Python platform from Portugal. You will develop backend services and APIs with Python/Flask, design async processing with Celery and RabbitMQ, and work with MongoDB.

You will debug issues, improve tests, and contribute to CI/CD and documentation in a collaborative, international team. You have 4+ years of Python experience, Flask REST APIs, MongoDB, and strong English skills, plus familiarity with Git, AWS, and modern