We are constantly looking for valuable people to join our company and favour its successful development. If you are willing to join a cutting edge telecom solutions company, if you are willing to face new challenges and achieve success in a dynamic industry, then we are waiting for you to join us.

vox carrier careers


As an SMS Firewall Engineer, you will play a crucial role in managing and monitoring A2P/P2P SMS traffic, ensuring secure and reliable connections for our telco and enterprise partners. Your expertise in traffic filtering and network analysis will be key in maintaining the integrity of our cutting-edge technology.


  • A2P/P2P SMS traffic management and monitoring (Firewall rules management)
  • Develop new rules and algorithms for traffic filtering
  • Detecting and blocking gray route leakages (off/on-net and international)
  • Regularly analyze potential ways of traversing the customized traffic filtering rules.
  • Traffic analysis and regular report generation for senior management and partners.
  • Participate in preparing, presenting, testing, and implementing new systems and VAS (Firewall system installation and solution integrations)
  • Ensuring overall system health which includes VMs, Databases and physical servers.
  • Monitoring, diagnosing anomalies, and troubleshooting VAS (value-added services)
  • Take measures aimed at increasing the reliability of service platforms and improving the quality of services provided to MNOs.
  • Troubleshoot problems related to security risks
  • Designing and efficiently applying safety policies to projects
  • Make changes to the service platform settings according to the test results and requests of MNOs and control such changes’ impact on the quality of the provided services.

Screening questions/profile:

  • 2+ years as an Engineer in a Telecom Operator/Vendor.
  • Hands-on experience with SMS Firewall will be a strong advantage.
  • Skills in working with monitoring systems of telecommunication equipment and network infrastructure.
  • Linux skills.
  • Practice database usage (MySQL, PostgreSQL).
  • Knowledge of SS7 (MTP, SCCP, TCAP, MAP), SMPP.
  • Knowledge of SIGTRAN (M2PA-M3UA-SCTP stack).
  • Knowledge of REGEX.
  • Ability to meet deadlines and manage project delivery.
  • Critical thinking and problem-solving capabilities.

VOX is a visionary company led by a single founder, currently leading the way in flashcall and telecom carrier services, transforming the way businesses communicate, authenticate and connect. As a hyper-growth company, VOX achieved over 50% YoY revenue growth last year and is aiming to reach $100M+ revenue this year. With a capitalization of $70M, VOX is seeking a large round of funding of over $100M in the coming year to accelerate its expansion.

VOX’s cutting-edge technology and dedicated customer service team ensure that telcos and enterprises maintain secure, fast, and reliable connections while protecting their networks. VOX’s promise of a hassle-free experience and superior customer support enables telcos and enterprises to focus on success.

Joining VOX offers the opportunity to work with the industry’s leading technologies and help them stay ahead and continue to innovate with a comprehensive suite of flashcall and telecom carrier services. VOX is highly committed to providing its employees with a dynamic, forward-thinking work environment, competitive compensation and benefits, vacation and time-off packages, and stock options. This is a once-in-a-lifetime opportunity for highly ambitious individuals, as VOX plans to expand its solutions portfolio and go public in the next 3-4 years.
Join the team and help shape the future of the telecom industry!


Other jobs at Vox Carrier

GLOBAL AWARDS 2019 & 2021.