TENIOS GmbH
TENIOS GmbH
Înființată în 2001, TENIOS GmbH dezvoltă soluții de comunicații cloud pentru companiile care au nevoie de o infrastructură flexibilă pentru comunicații vocale și mesagerie. Oferta sa include API-uri vocale, voiceboturi bazate pe inteligență artificială, centrale cloud, trunking SIP și rutarea inteligentă a apelurilor, permițând configurarea unor fluxuri personalizate de comunicare cu clienții. Cu accent pe tehnologii sigure și scalabile, TENIOS sprijină peste 2.000 de companii, inclusiv organizații din sectoarele asigurărilor și bancar.

Senior Java Software Engineer Hybrid Cologne

Join TENIOS GmbH as a senior Java engineer building cloud-native communications, telephony, and AI voicebot systems. Lead backend services, platform reliability, and the evolution of a highly available communications platform.

Descriere

  • Own the cloud-native communications platform from development through operation.
  • Build and maintain low-latency call-control systems with FreeSWITCH and Kamailio.
  • Develop advanced automatic call distribution engines and AI-powered IVR workflows.
  • Connect real-time AI voicebot platforms through WebSockets and RTP.
  • Scale Java 21+ and Spring-based backend microservices.
  • Extend multi-tenant architecture through isolation, metering, and resource partitioning.
  • Maintain automated usage-rating, billing, and invoicing systems.
  • Apply secure coding practices aligned with ISO 27001 and NIS 2 requirements.
  • Operate CI/CD pipelines, Kubernetes deployments, and observability systems targeting 99.99%+ availability.
  • Support existing Backbone.js and Marionette.js interfaces while guiding migration to modern frontend frameworks.
  • Use and champion AI-assisted development tools and agent-based CLI workflows.
  • Work closely with Platform Engineering, Security, and Product teams.

Cerințe

  • At least five years of professional software development experience, focused on Java backend systems.
  • Strong command of modern Java 17/21+, Spring Boot, Spring Framework, JPA/Hibernate, and RESTful API design.
  • Experience architecting and delivering distributed, cloud-native microservices applications.
  • Practical experience with Docker, Kubernetes, and a modern CI/CD platform such as GitHub Actions, GitLab CI, Jenkins, or Argo CD.
  • Experience working with at least one major cloud provider: AWS, Azure, or GCP.
  • Solid understanding of automated testing, code review practices, and continuous delivery.
  • Knowledge of secure software development, including OWASP Top 10, dependency management, and secrets management.
  • Experience with observability across metrics, centralized logs, distributed tracing, and application performance monitoring.
  • Confidence operating production systems and handling incidents.
  • Strong analytical ability and sound technical judgment in complex distributed environments.
  • Fluent written and spoken English; German is advantageous.
  • Hands-on experience with AI-assisted development tools or a genuine willingness to adopt them.
  • Experience with CPaaS, cloud communications, telecommunications protocols such as SIP, RTP, or WebRTC, or related frameworks including FreeSWITCH, Kamailio, or Asterisk.
  • Knowledge of carrier-grade, highly available, low-latency distributed systems.
  • Experience with asynchronous messaging and event-driven architectures using Kafka, RabbitMQ, or similar technologies.

Beneficii

  • Gross annual salary of €67,000–€72,000, depending on experience.
  • Hybrid working arrangement based in Cologne.
  • Opportunity to serve customers across multiple European markets within a rapidly growing technology company.
  • Regular work with advanced AI solutions and digital tools.
  • International, highly productive team with quick decisions and a direct impact on company growth.

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