Senior Java Software Engineer - Automation Solutions (Curitiba- Hybrid)

At Mitel, you will have the opportunity to help businesses connect, collaborate and provide better experiences for our customers. You will deliver valuable contributions in creating business success within our global organization utilizing your unique attributes, skills and experience.

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Overview:

You will join Automation development team to build and evolve an in-house platform that runs large-scale load and functional tests for real-time communication and VoIP systems. You will own features end-to-end, work across the stack — from Java services down to C/C++ media components and Linux networking — and help scale tests that simulate thousands of concurrent users and calls.

We expect strong fundamentals, leadership capability and the ability to learn fast: several of our specialized tools and technologies are developed in-house, and you will have room to grow into them on the job.

Responsibilities:

• Design, build, and maintain Java components of the test-automation platform.
• Work with real-time media and VoIP flows: signaling, media transport, NAT traversal, and transport security.
• Build and debug C/C++ components on Linux when needed.
• Package and run the system with Docker and container orchestration.
• Diagnose complex issues across application code, protocols, containers, and networking.
• Contribute to CI/CD, code review, and technical documentation.
• Collaborate daily in English with a distributed, international team.

Requirements:

• 4+ years of software development, with strong senior-level Java (concurrency, multithreading, performance).
• C/C++: able to read, build, and debug native code on Linux.
• Docker and containers; comfortable running multi-service systems.
• Linux: shell scripting, service management, troubleshooting.
• Networking fundamentals: TCP/UDP, TLS, sockets, NAT, and packet inspection.
• Advanced English, written and spoken.

To ensure our hiring process is fair, efficient, and transparent, we want to inform all applicants that we may use Artificial Intelligence (AI) technologies, including third party tools to screen resumes and match candidates to job opportunities based on their skills and experience. All applications are also reviewed by our hiring team, and final decisions are made by our hiring managers. Kindly review our privacy policy (Mitel Privacy Policy) for more information and to understand how to exercise any of your rights.

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Mitel is committed to achieving workforce diversity and creating an inclusive working environment. Diversity makes sense for us, for our customers and for our future. We value different perspectives, skills and experiences, and welcome applications from all sections of the community.