TENIOS GmbH

Full-stack Engineer

• Take end-to-end ownership (“you build it, you run it”) of the cloud-native communications platform
• Develop and maintain low-latency call-control systems that integrate with FreeSWITCH and Kamailio
• Build ACD engines and AI-powered IVR workflows
• Integrate real-time AI voicebot platforms into telephony workflows via WebSockets/RTP
• Further develop and scale the backend platform using Java 21+/Spring-based microservices and RabbitMQ
• Expand multi-tenant capabilities, including isolation, metering, and resource partitioning
• Maintain and enhance usage-rating, billing, and invoicing engines
• Apply secure coding practices such as OWASP guidance, threat modeling, and dependency scanning
• Support ISO 27001 compliance and European NIS2 cybersecurity requirements
• Manage CI/CD pipelines, Kubernetes deployments, and observability
• Ensure platform availability of 99.99%+
• Maintain existing Backbone.js and Marionette.js management interfaces and lead the migration to modern frontend frameworks
• Use and promote AI development tools and agent-based CLI workflows for coding, refactoring, and software delivery
• Collaborate closely with Platform Engineering, Security, and Product

Senior Software Engineer, Java

Artificial Intelligence

• Own Voice AI agent projects from start to finish
• Conduct discovery calls with new customers in the DACH region and international markets
• Understand contact center processes and identify automation opportunities
• Gather requirements and translate them into concrete specifications
• Create process diagrams, target call flows, and business process documentation
• Write customer-facing agent descriptions
• Prepare discovery question sets and follow-ups
• Present findings, options, and recommendations to customers
• Build and iterate Voice AI agents on a no-code platform
• Configure CRM/API integrations and complex logic together with the integration and development teams
• Test agents, conduct test calls, and refine wording and logic
• Monitor business KPIs such as conversion rate, call duration, goal attainment, and escalation rate
• Analyze agent flows as funnels and identify drop-off points
• Analyze call recordings and transcripts
• Propose changes and drive their implementation
• Support POC and production projects to ensure KPI commitments are met
• Take over existing German and international customers and manage ongoing projects

Senior Software Engineer, Java

Conversation Designer – Voice AI Agents