About us
Committed to building the next generation of 100% software-based mobile networks, ng-voice is creating innovative mobile infrastructure solutions and making them accessible for operators and enterprises that want to deploy future-proof networks.
As an IMS Software Architect (m/f/d) at ng-voice, you will have the opportunity to design and build IMS components from scratch, working in an environment that encourages technical ownership, freedom of choice, and creative problem-solving. You will be empowered to challenge legacy approaches and replace them with modern, cloud-native architectures.
This is a hands-on software architecture role with a strong engineering focus. You will not only define architectural concepts but also design and implement software, working closely with development teams to turn architecture into production-ready systems. The role is focused on internal product architecture and engineering, not customer-facing solution design or pre-sales activities.
You will combine telecom protocol expertise with modern cloud-native and microservices-based software architecture to build scalable, resilient IMS components aligned with 3GPP standards.
Tasks
What you will do as IMS Software Architect (m/f/d):
- Own and drive the end-to-end architecture of cloud-native IMS components and network functions (CNF).
- Actively design and contribute to the implementation of IMS components using C, Go, and Python.
- Define architecture, performance, scalability, and resiliency targets for IMS services.
- Design and evolve microservices-based IMS core components (e.g. P-CSCF, I-CSCF, S-CSCF, BGCF, HSS/UDM, TAS).
- Ensure architectural alignment with 3GPP and ETSI standards, including VoLTE, VoWiFi, and VoNR.
- Partner closely with development teams to ensure architectural consistency, code quality, and best practices.
- Translate business and product requirements into clear architectural blueprints.
- Produce high-level and low-level design documents, architecture diagrams, and interface specifications.
Requirements
What we are looking for in an IMS Software Architect (m/f/d)Our ideal new colleague brings a strong engineering background and a passion for designing and building complex software systems.
The role is open to experienced medior and senior profiles, depending on depth of hands-on experience and architectural ownership.
You may come from either of the following backgrounds:
- A software architect / senior engineer with strong experience in distributed systems and cloud-native architectures, combined with solid IMS knowledge, or
- An IMS expert with hands-on experience in software architecture and modern application design.
Required skills & experience
- Proven hands-on experience designing and implementing production-grade software systems.
- Strong understanding of IMS architecture and call flows.
- Solid knowledge of SIP, Diameter, RTP, and related telecom protocols.
- Know-how in cloud-native architectures, and containerization.
- Strong understanding of VoLTE, VoWiFi, and 5G voice (VoNR) solutions.
- Strong programming experience in at least one of the following languages: C, Go, or Python.
- Strong analytical, problem-solving, and documentation skills.
- Ability to collaborate effectively with product, R&D, and cross-functional teams.
Nice to have- Experience with Kamailio, FreeDiameter, or similar open-source telecom frameworks.
Benefits
A little more about our culture and why you should join
- Work-Life-Balance is a priority: Flexible working that suits you - we live and breathe a hybrid remote culture and don't mind where and when you work
- We are committed to building a diverse team that represents a variety of backgrounds, perspectives, and skills in a traditionally not very diverse industry
- We offer you the culture of a fast-growing start-up with the maturity of an enterprise company
- We are more interested in your experience and knowledge than formal degrees
- Entrepreneurial culture and flat hierarchies
- Mobility benefit, fitness benefit, language class benefit and wellness benefit (for full-time employees)
- Home office budget (for full-time employees)
