Senior Backend Engineer - Python/Django

Holafly; Dublin; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

25 Days PTO

5% pension contribution

€ 3000 for Medical/Health coverage

Self development budget

Job summary

Holafly is hiring a Back-end Engineer to own the development of our global connectivity platform. You will build high-performance APIs that scale to millions of users, using Python, Django and DRF, while driving quality with robust unit tests and automated checks.

You will join the IT Delivery team in Ireland, work on cross-border collaborations, and optimize data access patterns to ensure resilience during peak travel seasons. A strong focus on performance and clean architecture is required.

Qualifications

• 5+ years in backend development with Django/DRF.
• Experience designing microservices architectures.
• Experience with asynchronous programming and high-load queries.
• Based in Ireland or willing to relocate with valid work visa.

Responsibilities

• Build and optimise mission-critical microservices using Python, Django, and Django REST Framework (DRF).
• Engineer Quality Frameworks by implementing robust unit testing (Pytest) and automated quality checks.
• Architect scalable APIs from scratch to handle high-concurrency traffic.
• Eliminate technical debt by resolving performance bottlenecks, including N+1 queries and async tasks.
• Collaborate with Product and QA teams across borders to translate business logic into robust solutions.
• Champion best practices across the software life-cycle, from design to code reviews.

Skills

Django DRF

Python

Unit Testing

Async programming

Microservices

High-load queries

Education

Tools

Pytest

Silk

Job description

Company Overview

Holafly is a high-growth scale-up revolutionising how businesses and travellers connect to the internet abroad. Since 2018, we’ve empowered travellers in over 200 destinations worldwide with secure and reliable eSIM solutions. With a team of 500+ professionals across multiple countries, we are scaling globally to support travellers with seamless, unlimited data connectivity.

Company Overview

Holafly is a high-growth scale-up revolutionising how businesses and travellers connect to the internet abroad. Since 2018, we’ve empowered travellers in over 200 destinations worldwide with secure and reliable eSIM solutions. With a team of 500+ professionals across multiple countries, we are scaling globally to support travellers with seamless, unlimited data connectivity. We’re not just connecting people—we’re enabling freedom and peace of mind, ensuring our users stay connected from the second they land, wherever their journey takes them.

The team

You would be part of the IT Delivery team. For us, companionship and enjoyment when doing our work come first. We believe in continuous improvement, automation and collective knowledge without leaving human values behind. Always following best practices.

The role

As a Back-end Engineer, you will be the technical engine behind our global connectivity platform, ensuring our services are scalable and resilient. You will own the development of high-performance APIs, directly enabling millions of users to stay connected anywhere in the world.

Key Responsibilities

• Build and optimise mission-critical microservices using Python, Django, and Django REST Framework (DRF).
• Engineer Quality Frameworks by implementing robust unit testing (Pytest) and automated quality checks to ensure elite code standards.
• Architect scalable APIs from scratch, ensuring they can handle high-concurrency traffic during peak travel seasons.
• Eliminate technical debt by identifying and resolving performance bottlenecks, including N+1 query issues and asynchronous task optimisation.
• Collaborate across borders with Product and QA teams to translate complex business logic into maintainable technical solutions.
• Champion best practices in the software life-cycle, from design patterns and documentation to comprehensive code reviews.

Qualifications

• 5+ years of experience in backend development with a mastery of Django and Django REST Framework (DRF).
• Strong expertise in Unit Testing and establishing quality-first development frameworks.
• Proven experience designing microservices architectures and integrating complex third-party ecosystem applications.
• Proficiency in asynchronous programming and managing high-load database queries.
• Based in Ireland or willing to relocate, with a valid work visa already in place (Holafly does not provide visa sponsorship or relocation assistance).

Good to have

• Fluency or professional working proficiency in Spanish.
• Experience with Silk or other performance profiling tools.

Benefits & Perks

• 25 Days of PTO
• 5% pension contribution
• € 3000 for Medical/Health coverage
• Self development budget of $ 500