(Senior) Frontend / WebApp Engineer (m/f/x)

We’re looking for a Frontend / WebApp Engineer who will work on customer-facing applications including dashboards, reporting tools, and web interfaces for our test and monitoring platform.

Sipfront builds automated testing and monitoring solutions for real-time communication systems such as VoIP, SIP, WebRTC, and unified-communications platforms.

Our automated test engine continuously evaluates call quality, signaling behavior, audio performance, and end-to-end communication reliability.

We help telecom operators, enterprises, and AI-voice platforms ensure stable, high-quality communication 24/7.

• Develop and maintain web applications for our customer-facing monitoring and reporting platform.
• Collaborate with backend services and integrate data-heavy components into the UI.
• Use JavaScript to build interactive front-end features.
• Work in a Cloud-based environment for development and deployment.
• Contribute to or interface with Perl and Mojolicious services or a modern Framework
• Help design and implement responsive, accessible user interfaces.
• Translate telecom and monitoring domain requirements into deliverable features.
• Visualize real-time metrics, logs, dashboards, and reporting interfaces.

• Strong JavaScript experience or similar.
• Familiarity with or willingness to learn Perl and Mojolicious.
• Understanding of REST APIs and real-time data handling.
• Experience with UI/UX principles and data visualization.
• Good communication skills in English; German is a plus.
• Ability to work in agile startup environments.
• AWS / Cloud-based environment experience

• Work on a cutting-edge real-time communication & AI testing and monitoring product.
• Be part of a growing Vienna-based startup with international customers.
• Shape product direction, UX, and front-end architecture.
• Hybrid work model with flexibility.
• Collaborative, friendly international team.
• Employee stock options

Send us a message including

• a link to your LinkedIn profile or a CV, and…
• a summary of your accomplishments and/or a link to your Github

About the interview:

• Non-technical part (30min, video call)
• Technical part (1-2h, video call or on-site)