Senior Software Developer (Backend API Services)

TL;DR

Senior Software Developer (Python): Designing and developing API and database backend services for a cloud-hosted PBX platform with an accent on scalability, reliability, and observability. Focus on optimizing system performance, debugging complex production issues, and evolving high-load networked systems.

Location: Primarily remote, but requires occasional visits to offices in Portugal (Coimbra, Aveiro, Porto) or the UK (Bristol, London).

Company

A leading provider of cloud communications and collaboration technology that enables businesses to connect more effectively.

What you will do

• Design, build, and maintain backend services for a cloud-hosted PBX platform.
• Contribute to architectural decisions focusing on functionality, scalability, and maintainability.
• Perform data-led analysis for system profiling and performance optimization.
• Debug and resolve complex technical issues in production and pre-production environments.
• Collaborate with QA to define functional and performance test strategies.
• Write clean, maintainable, unit-tested code and mentor engineers through code reviews.

Requirements

• 5+ years of professional backend software development experience.
• Recent professional experience programming in Python.
• Experience with Linux-based development, Nginx, and Tomcat.
• Strong proficiency in SQL and relational database schema design.
• Ability to safely modify existing legacy codebases and design high-load systems.
• Experience with CI/CD practices and extensive test automation.

Nice to have

• Practical knowledge of Perl, JavaScript, TypeScript, or Go.
• Hands-on experience with asyncio, aiohttp, or dramatiq.
• Experience using observability tools such as Elasticsearch and Grafana.

Culture & Benefits

• Culture built on teamwork, transparency, and mutual accountability.
• Fast-paced environment with strong opportunities for internal promotion.
• Flexible work arrangement combining remote work with occasional office collaboration.
• Environment that values individual voice and the ability to make a tangible difference.

Hiring process

• Application and internal review.
• Technical and cultural interviews.
• Hiring decision.