Team Lead, Software Developer in Test (VoIP)

TL;DR

Team Lead, Software Developer in Test (VoIP/Python): Ensuring the quality and reliability of the Hosted PBX Voice Platform with an accent on automated testing of real-time VoIP systems and network interactions. Focus on designing API and end-to-end test suites, integrating CI/CD pipelines, and providing technical leadership to the QA team.

Location: Must be located in Portugal (Hybrid work style with offices in Coimbra, Aveiro, and Porto)

Company

A leading provider of cloud communications and collaboration technology focusing on high-growth and high-reliability cloud systems.

What you will do

• Design and maintain automated tests across API and end-to-end system layers.
• Integrate test suites into CI/CD pipelines using GitHub Actions and Jenkins.
• Analyze failures and validate VoIP call flows and signaling behavior using tcpdump and Wireshark.
• Execute load and reliability tests, defining and monitoring key quality metrics.
• Apply AI-assisted tools to improve test coverage and failure analysis.
• Provide technical guidance and leadership to the team members.

Requirements

• Must be located in Portugal.
• Strong programming experience in Python; C/C++ is preferred.
• Experience with test automation frameworks (pytest or equivalent) and CI/CD systems.
• Strong Linux experience and solid understanding of IP networking (TCP/UDP, routing, NAT).
• Hands-on experience with pcap analysis, Wireshark, and tcpdump.
• Bachelor’s or Master’s degree in Computer Science or equivalent.

Nice to have

• Experience with VoIP/SIP systems and PBX/UC call features.
• Knowledge of voice quality analysis (MOS, jitter, packet loss, latency).
• Experience with load and performance testing under high traffic conditions.
• Familiarity with observability tools like Grafana and Kibana.
• Experience with Python’s asyncio module.

Culture & Benefits

• Hybrid working style providing flexibility between remote work and office collaboration.
• Culture rooted in teamwork, transparency, and mutual accountability.
• Strong internal promotion tracks with many long-term employees.
• Fast-paced and intense environment for those who thrive on creating success together.

Hiring process

• Application submission.
• Review process.
• Hiring decision.