VoIP Developer


We make it strangely simple for businesses to talk to clients, customers and colleagues, wherever they are. This is global communication redefined, free from the tyranny of PSTN lines.

We’re looking for a Senior VoIP Developer to come and join our R&D Department based in Brussels as we continue with exciting projects, building industry-leading products.

As one of the most exciting companies in the VoIP tech space, Voxbone is growing fast. With headquarters in Brussels and development centers in Brussels and Iasi, we’re creating a technology platform and developing tools to revolutionize the way companies use VoIP for business.

You will be part of a multi-skilled team that’s delivering the heart of our products and services, based on open source technology. We need fearless innovators who are able to understand complex challenges and provide industry-leading solutions. Our technology stack consists of Java and C code on top of MySQL, Cassandra and RabbitMQ.

Should you choose to accept it:

- Build robust, manageable and scalable voice and messaging services in java and C.

- Write services for SIP, SMPP, T.38 protocols and many more.

- Analyze project requirements together with your teammates.

- Develop new features and optimize existing ones.

- Work closely with your team incorporating feedback from product management and other stakeholders to create optimally, integrated,performing and scalable solutions.

- Rapidly fix bugs and problems and create automatic tests to avoid those in the future.

- Pro-actively look for ways to make Voxbone better.

- Be an active participant in discussions about design and architecture.

- Be passionate about technology and quality deliverables.

- Be an advocate for best practices in software development (TDD, high code coverage unit and integration tests, etc.).

To join our crew, you need

- Deep knowledge of SIP, SMPP 

- Powerful C, C++, Java, Python and perl skills- you could do this stuff in your sleep

- Ability to design software for performance and scalability.

- To feel totally at home in a Linux environment 

- A disciplined approach to testing and quality assurance, knowledge of test automation

- To be a team player, not afraid to communicate clearly on issues and progress

- To be comfortable working against deadlines

We'd be extra happy if you had

- Working knowledge of asterisk and kamailio

- Experience with Java 8, Hibernate and Spring 4

- Experience with message and job queuing services (RabbitMQ)

- Experience with MySQL

- Knowledge of Cassandra and Kafka is a plusWorking knowledge of asterisk and kamailio

- Experience with Java 8, Hibernate and Spring 4

- Experience with message and job queuing services (RabbitMQ)

- Experience with MySQL

- Knowledge of Cassandra and Kafka is a plus

Sound good? We’re offering…

- Competitive salary and bonus package

- Key role in a fast-growing company

- A fun and extremely international environment

- Frequent company events and socials

- Free healthy snacks and drinks, organic coffee for the caffeine addicts!

- Health insurance

- 401k

- Home internet reimbursement

- Work laptop and mobile phone including a monthly plan

- Travel encouragement and flexibility

- Parking allowance

Because We care...

Voxbone is an equal opportunity employer, and we’re proud of our ongoing efforts to bolster diversity & inclusion in our workplace and wherever our employees are based. Any individuals seeking employment at Voxbone are considered without regard to race, color, religion, national origin, age, sex, gender identity or expression, sexual orientation, marital status, medical condition, ancestry, physical or mental disability, or any other characteristic protected by applicable law.

By submitting your application for one of our open positions, you agree that Voxbone may collect your personal data for recruiting and related purposes. For further information with regards to how Voxbone process your personal data, please see  Voxbone’s Privacy Policy