Backend Developer (VoIP)

Alohi; Genf; Hybrid; CHF 90,000 - 130,000; Full time

Job summary

Alohi SA is seeking an experienced Back-end developer to join our team, focusing on server-side logic, APIs, and a robust central database to support a high-demand frontend.

You'll work with telephony, faxing modules, and build scalable backend services, ensuring performance, reliability, and maintainability in a modern tech stack.

Qualifications

• Between 3-5 years of IT experience in software engineering.
• Proficiency and experience in open source telephony solutions (Freeswitch and Asterisk) and implementation of digital faxing.
• Strong Linux knowledge and experience.
• Experience in programming using Python.
• Experience in working with complex data structures (MongoDB, MariaDB, Elasticsearch)
• Good understanding of technologies such as HTTP, REST, web servers and microservices.
• Have experience with Containerization (Docker, Kubernetes, etc).
• Familiar with build systems and CI/CD procedures.
• Ability to write scalable code.

Responsibilities

• Build and maintain mission-critical backend systems to support high-volume requests.
• Address performance issues in a scalable environment.
• Create web services and implement various backend modules for online faxing.
• Ensuring that development tasks are completed within the timeline provided and that issues are fully tested with minimal defects.

Skills

3-5 yrs IT exp

Freeswitch

Asterisk

Digital faxing

Linux

Python

MongoDB

MariaDB

Elasticsearch

HTTP/REST

Web servers

Microservices

Docker

Kubernetes

CI/CD

Build systems

Scalable code

Tools

Docker

Kubernetes

Freeswitch

Asterisk

Job description

Description

Alohi SA brings together a team of highly competent engineers that focus on merging state-of-the-art technologies with compelling user experience in order to simplify and enhance life for companies and people around the world. The company provides Sign.Plus (a legally binding electronic signature), Fax.Plus (online faxing), Dial.Plus (AI-voice agent), and Scan.Plus (AI-powered mobile scanner) services to over 4,000,000 customers worldwide.

At Alohi, we began our journey with an initial seed investment from Fongit “Fondation Genevoise pour l’Innovation Technologique” which is backed by the state of Geneva. But instead of relying on external funding to fuel our growth, we’ve chosen to bootstrap our way to success. This approach has allowed us to prioritize our customers and build products that truly meet their needs, without being beholden to outside investors. By remaining financially independent, we’ve been able to maintain our autonomy and agility, which have been key factors in our ability to innovate and stay ahead of the curve.

Job Description

We are looking for an experienced Back-end developer (telephony, faxing) to join our team. The primary focus of the Backend Developer is to develop the server-side logic as well as the development and maintenance of the central database, ensuring high responsiveness and performance to requests from the frontend. The Backend Developer must be highly skilled at developing Application Program Interface (APIs).

Responsibilities

• Build and maintain mission-critical backend systems to support high-volume requests.

• Address performance issues in a scalable environment.

• Create web services and implement various backend modules for online faxing.

• Ensuring that development tasks are completed within the timeline provided and that issues are fully tested with minimal defects.

Requirements

• Between 3 - 5 years of IT experience in software engineering.

• Proficiency and experience in open source telephony solutions (Freeswitch and Asterisk) and implementation of digital faxing.

• Strong Linux knowledge and experience.

• Experience in programming using Python.

• Experience in working with complex data structures (MongoDB, MariaDB, Elasticsearch)

• Good understanding of technologies such as HTTP, REST, web servers and microservices.

• Have experience with Containerization (Docker, Kubernetes, etc).

• Familiar with build systems and CI/CD procedures.

• Ability to write scalable code.