About SmartTel Plus
SmartTel Plus is a European tech group headquartered in Tallinn, with offices in Germany, Italy, Poland, and Latvia. We create truly autonomous AI solutions — voice and chat agents that don’t just respond but act to achieve real business goals.
Our platform combines a powerful AI engine with full telecom infrastructure, including SIP trunking, phone numbers, call routing, and SMS/RCS messaging. This means our AI agents work efficiently from day one, with enterprise-grade security, compliance, and no lengthy training required.
Join us to work with cutting-edge AI and telecom technology, gaining full control to launch, manage, and evolve AI agents independently.
In this role you will:
- Develop supportive platform APIs for customer details, billing processes, and product configuration
- Contribute to Core Platform Systems, including Customer Management, Product Delivery, IAM Centre, and the Billing Integration Layer
- Build services and libraries that are shared across all engineering teams
- Focus on security-hardened, efficient solutions following industry best practices
- Maintain legacy PHP/Go services with a focus on stability, security, and minor feature improvements
Tech stack
Dev: Go, PHP (legacy), PostgreSQL, MongoDB, Redis, RabbitMQ
Ops: GCP, Docker, Kubernetes, GitLab/GitLab CI, Prometheus, Grafana, ELK
We’re looking for someone who has:
- 2+ years of commercial experience in backend development in any language
- 1+ year of experience with Go (commercial or non-commercial)
- Solid understanding of backend design principles (API design, modularity, testing, error handling)
- Basic familiarity with the Go ecosystem and community conventions
- Experience with SQL and NoSQL databases and fundamental data-modelling concepts
- Ability to write maintainable unit tests for critical paths
Nice-to-have skills:
- Experience with PHP frameworks (Yii2, Symfony)
- Practical experience with DDD
- Understanding of distributed-systems patterns
- Strong debugging and troubleshooting mindset; ability to trace and resolve production issues
- Ownership attitude and familiarity with monitoring, alerting, and incident handling
- Ability to use AI tools and agents to speed up development
Why Apifonica?
- Exciting work in a fast-growing international company
- Opportunities to gain cross-functional and international experience
- Competitive compensation package
- Professional growth and development opportunities
- Flexible hybrid schedule: 2 days per week in our modern office, the rest remotely
About the company
Company website•Software Development and Telecommunications
Apifonica is a European AI company specialising in smart solutions for automating communication between businesses and their customers.
Built on our proprietary platform, we develop highly efficient AI agents capable of engaging in personalised and meaningful conversations in any language. Our technology combines Conversational AI, speech recognition, fine-tuned models customisation, and scenario visualisation, unlocking truly limitless opportunities for meaningful customer interactions.
The platform can handle thousands of simultaneous conversations and is especially effective during peak periods. It supports active omnichannel communication, with capabilities such as making and receiving calls from any number worldwide, and enhancing customer engagement through SMS or RCS links. The advanced call outreach tools ensure the delivery of critical information, even when a customer’s phone is temporarily unavailable or switched off (for instance, debt notifications, emergency alerts, and more).
Apifonica’s solutions integrate seamlessly with enterprise systems, provide essential analytics, and help businesses save time and resources.