Senior software engineer (m/f/d)

ng-voice; Germany (OH); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Hybrid remote culture

Home office budget

Wellness benefit

Language classes

Mobility benefit

Job summary

ng-voice is seeking a Software Engineer to develop the next generation of IMS features and applications. You will work on Kamailio-based signaling, SIP, Diameter, and cloud-native stacks using Kubernetes, Python, Go, C, and Bash.

You’ll test, validate, and optimize solutions, collaborate with a passionate team, and help improve operational efficiency while embracing a hybrid remote work model.

Qualifications

• Proficient in Kamailio and signaling protocols (SIP/Diameter).
• Experience with UNIX/Linux environments and scripting.
• Strong problem-solving and analytical skills.
• Good command of English for collaboration and documentation.

Responsibilities

• Develop the next generation of IMS features and applications using a test-driven approach.
• Collaborate with a cross-functional team to build scalable signaling solutions.
• Perform testing, validation, and optimization to ensure high-quality deliverables.

Skills

Kamailio

Go

Python

C

Bash

SIP

Diameter

UNIX/Linux

English

Kubernetes

Tools

Redis

MySQL

Docker

Job description

About Us

Committed to building the next generation of 100% software-based mobile networks, combining DevOps with telecommunications expertise, ng-voice is creating innovative mobile infrastructure solutions and making them accessible for operators and enterprises that want to deploy future-proof networks.

Job Overview

We’re hiring a talented Software Engineer (m/f/d) to join our team in developing the next-gen features and applications for our IMS solution. As a Software Engineer (m/f/d), you’ll build complex applications, optimize solutions, and improve operational efficiency. The ideal candidate has expertise in telephony, Kamailio, SIP, Diameter, and cloud-native technologies like Kubernetes.

What You’ll Do

• Develop the next generation of features and applications for our IMS solution using a test‑driven development approach.
• Collaborate with a passionate team to develop the next generation of features and applications.
• Perform testing, validation, and optimization of solutions to ensure high‑quality deliverables.
• Identify opportunities to improve operational efficiency and propose innovative solutions.
• Work with technologies such as Kamailio, Redis, MySQL, SIP, RTP, Diameter, C, Python, and Bash.
• Opportunity to work on the full spectrum of IMS nodes: P‑CSCF, S‑CSCF, I‑CSCF, RTP‑Engine, MMTel, HSS, PCRF, DRA, BGCF, TOPOS, TADS, E‑CSCF.
• Understand 3GPP specs and incline the IMS solution to the standards.

Requirements

• Strong programming skills in Kamailio; knowledge of Go or Python is considered a plus.
• Experience with Kamailio is highly desired but not a must.
• Knowledge of telephony and signaling standards such as SIP and Diameter.
• Experienced and comfortable working on UNIX/Linux operating systems.
• Strong problem‑solving and analytical skills.
• Self‑motivated and able to work autonomously.
• Ability to adapt to a fast‑paced and dynamic work environment.
• Proficiency in English.

Benefits

• 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.
• 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).

ng-voice is an equal opportunity employer. We believe demographic characteristics and diverse experiences that have nurtured unique viewpoints benefit our growth and performance and value each person and their different background as a whole.