Freelance Opportunity: Voice SIP Engineer – Mid Level

Company Description

ThreatXIntel is a startup cyber security company providing tailored, affordable solutions to protect businesses and organizations from cyber threats. The company specializes in cloud security, web and mobile security testing, cloud security assessment, and DevSecOps. ThreatXIntel takes a proactive approach to security to ensure clients' digital environments are secure and free from vulnerabilities.

Role Description

Freelance Voice SIP Engineer (Mid-Level)

You will work with internal IT teams to maintain, design, and troubleshoot VoIP/SIP infrastructure, automate system tasks, and improve service delivery through robust monitoring and configuration practices.

Key Responsibilities

• Install, configure, and maintain

  Oracle Session Border Controllers

  (SBCs) including transport, session routing, and registration.
• Troubleshoot

  SIP call flows

  using tools like

  Wireshark

  ,

  NetScout

  ,

  Observer

  , or

  Enterprise Operations Monitor

  .
• Support and maintain

  Session Management Systems

  in large Contact Center environments.
• Optimize

  VoIP/SIP networks

  , analyze outages, and identify areas for performance improvement.
• Automate infrastructure tasks using

  Python

  ,

  PowerShell

  , or

  JavaScript

  .
• Develop infrastructure-as-code and manage service delivery via

  CI/CD pipelines

  .
• Collaborate with internal teams to implement voice integration with

  cloud-based services

  .
• Provide mentorship to junior team members when needed.

Required Skills & Experience

• 4+ years of experience with

  Oracle SBCs

  (installation, transport, session management).
• 4+ years of experience supporting

  Session Management Systems

  .
• 4+ years working with

  VoIP/SIP infrastructure

  in large

  Contact Center environments

  .
• Strong expertise in

  SIP troubleshooting and packet analysis

  using tracing tools.
• Scripting experience with

  Python

  ,

  PowerShell

  , or

  JavaScript

  .
• Familiarity with

  CI/CD pipelines

  and infrastructure automation.
• Understanding of

  cloud voice integration

  (preferred: AWS, Azure, or Google Cloud).
• Bachelor’s degree OR 4+ years of equivalent hands-on experience.
  

Nice to Have

• Familiarity with risk management, compliance policies, and secure voice system design.
• Experience mentoring junior engineers or collaborating in cross-functional teams.