Student Developer - SIP Protocol Load Testing & Test Automation (m/f/d)

GoTo Meeting | Dresden, Germany | 20h/week | €16/hour

About the Role

Join our RTC (Real-Time Communication) backend services team at GoTo Meeting and help strengthen our SIP infrastructure testing capabilities. We're seeking an advanced student developer to build comprehensive load testing and automation solutions for our in-house SIP-based components, focusing initially on PSTN connection handling and expanding to automated functional testing for video communications.

Your Mission

You'll research, design, and implement automated testing solutions for our SIP protocol infrastructure. Starting with load testing capabilities for components handling hundreds of concurrent PSTN connections, you'll create dynamic, scalable test clients and later extend this work to automate existing manual test suites for SIP video functionality.

Key Responsibilities:

• Research and evaluate SIP testing tools and frameworks (including SIPp and alternatives)
• Design and implement SIP test clients with dynamic scaling capabilities for load testing scenarios
• Create solutions for audio streaming using pre-recorded files with existing codecs
• Integrate SIP testing capabilities into our TypeScript-based testing framework (wrapper approaches or alternative integration methods)
• Replace manual functional test suites with automated SIP video testing
• Deploy and orchestrate tests within our Kubernetes environment
• Document methodologies, tools evaluation, and maintain comprehensive test coverage
• Collaborate with backend teams to ensure realistic test scenarios against our in-house SIP servers

Technical Environment

• Protocols: SIP (Session Initiation Protocol) for voice and video communications
• Framework: TypeScript-based testing infrastructure with flexibility for integration approaches
• Infrastructure: Kubernetes clusters on AWS and OCI
• Scale: Dynamic load testing supporting hundreds of concurrent connections
• Testing Focus: Load testing for PSTN components, functional testing automation for SIP video
• Target Systems: In-house SIP backend servers and audio backend infrastructure

What We're Looking For

Required:

• Currently enrolled Master's student (or equivalent) at a German university
• Strong autonomous working skills and research capabilities
• Solid TypeScript development experience
• Proficiency with git as modern version control system
• Experience real-time communications concepts
• Kubernetes and containerization knowledge preferred
• Fluent English (German is a plus but not required)
• EU work authorization or valid German work permit for students

Preferred:

• Understanding of VoIP technologies and SIP protocol fundamentals
• Hands-on experience with SIPp or similar SIP testing tools
• Knowledge of audio/video codecs and RTP (Real-time Transport Protocol)
• Understanding of telecommunications concepts and load testing methodologies
• Experience with test automation and framework integration
• Familiarity with cloud-native testing approaches

What We Offer

• Competitive compensation: €16/hour for 20 hours/week
• Flexible duration: October 2025 - December 2026
• Complete setup: All necessary hardware, software, and development tools provided
• Hybrid approach: minimum of 2-3 office days per week in Dresden with remote flexibility
• Mentorship: Dedicated local supervisor and collaboration with experienced RTC engineers
• Real impact: Your work will directly improve testing coverage for critical communication infrastructure
• Learning opportunity: Deep dive into SIP protocols, load testing, and scalable test automation

Technical Challenges You'll Tackle

• Research & Discovery: Evaluate modern SIP testing tools and integration approaches
• Dynamic Scaling: Build test scenarios that dynamically scale from single connections to hundreds
• Framework Integration: Design seamless integration with existing TypeScript testing infrastructure
• Automation: Transform manual functional tests into reliable, repeatable automated workflows
• Performance: Establish meaningful load testing patterns for real-world PSTN traffic simulation
• Extensibility: Create foundations that can evolve from audio load testing to video functional testing

Work Arrangement

• Location: Dresden office (2-3 days/week required)
• Schedule: Flexible 20 hours/week arrangement
• Team: Collaboration with RTC backend engineers and QA specialists
• Note: If running parallel to Master's thesis, we're open to discussing timeline adjustments

Application Process

Ready to advance telecommunications testing infrastructure? Send us:

• Your CV highlighting relevant technical experience and any VoIP/SIP knowledge
• Brief cover letter explaining your interest in SIP protocol testing and automation
• Examples of previous projects, especially involving network protocols, testing frameworks, or research work
• Current enrollment confirmation

At GoTo, you’ll find the flexibility, resources, and support you need to thrive—at work, at home, and everywhere in between. You’ll work towards a shared goal with an open-minded, cohesive team that’s greater than the sum of its parts. We’re committed to creating an inclusive space for everyone, because we know unique perspectives make us a stronger company and community. Join us and be part of a company that invests in your future, where together we’ll Be Real, Think Big, Move Fast, Keep Growing, and stay Customer Obsessed. Learn more.

Note: This position requires enrollment at a German university. International students must possess valid work authorization in Germany.
Apply now and help ensure reliable communication experiences for millions of users worldwide!