Full Stack Developer – Voice & AI-Driven Systems

#3L89343

Type: Full time

3CX is looking for experienced Full Stack Developers. If you have solid knowledge of front-end and back-end languages and frameworks, experience with real-time systems, and a passion for building innovative software used by thousands of companies worldwide, then we want to hear from you.

Tasks

• You will join a small team of 4 developers working on our next-generation communication and automation platform, integrating our software with other CRM and AI-powered applications.
• You’ll build scalable systems that power intelligent features from real-time interactions to multi-channel workflows used by over 350,000 customers globally.
• You’ll help design and implement backend services that integrate external APIs and streaming media workflows to support features such as voice assistants, automated responses, and smart CRM actions.

What We Need

• Degree in Computer Science, Software Engineering, or equivalent.
• Analytical thinking and problem-solving mindset.
• Ability to work independently and in a structured way.
• Passion for innovation and cutting-edge development.

About You

• Front-End Languages & Frameworks
  JavaScript / TypeScript
  Angular (Vue is a plus)
• Back-End Technologies
  ASP.NET Core
  C#
  RESTful API integration and orchestration experience
  Understanding of streaming concepts (WebSockets, real-time event pipelines)
• Database Management
  PostgreSQL
  Experience optimizing SQL queries and schema design
  Other DBMS knowledge is a plus

Bonus Points For

• Experience with speech & language tools (Whisper, DeepSpeech, Polly, Google TTS, ElevenLabs)
• Knowledge of GPT, Claude, Rasa, Dialogflow, or other LLMs
• Prompt engineering, context memory (vector DBs, RAG), or multi-turn dialogue design
• Familiarity with WebRTC, SIP, Twilio, 3CX, or Asterisk
• Understanding of async programming, Celery/RabbitMQ/Kafka for background tasks
• Experience with Docker, Kubernetes, CI/CD (GitHub Actions, GitLab)
• Cloud infrastructure on AWS, GCP, or Azure
• Monitoring tools like Prometheus, Grafana, or ELK
• Security practices (OAuth2, API tokens, RBAC) and compliance (GDPR/HIPAA)
• Agile team experience, mentoring, and writing solid documentation

About the 3CX Team

Our award-winning platform is used by medium and large enterprises across the globe. At our state-of-the-art offices in Nicosia, you’ll work with a passionate and experienced team in a dynamic international environment.

We Offer

• Catering, private gym, and swimming pool access
• Performance-related bonuses and annual profit-sharing
• A high-impact role on products used worldwide

Application Process

Submit your CV via our website. All applicants will receive screening questions and a skills test prior to the interview. Only shortlisted candidates will be contacted.