Software Architect

Bachelor's degree in computer science, MCA, Telecommunications, or related field (or equivalent experience).

10+ years of experience designing and managing Asterisk-based telephony systems.

Strong understanding of SIP, RTP, IAX2, and VoIP protocols.

Hands-on experience with Asterisk configuration, dialplan scripting, and AGI/ARI development.

Knowledge of Linux (CentOS, Debian, Ubuntu) administration.

Experience with network protocols (TCP/IP, DNS, DHCP, NAT) and QoS tuning for VoIP.

Familiarity with call recording, IVR systems, voicemail, and conferencing.

Proficiency with monitoring and troubleshooting tools (Wireshark, sngrep, tcpdump).

Strong problem-solving, analytical, and documentation skills.

Sinch
is a global leader in the growing market for Communication Platforms as a Service (CPaaS) and mobile customer engagement. We are specialists in allowing businesses to reach everyone on the planet, in seconds or less, through mobile messaging, email, voice, and video.

We reach every phone on earth. From the lifechanging to the timesaving, we're helping our customers to interact with people like never before. For you, that means working in an environment that offers an incredible variety of exciting challenges, and the chance to impact how billions of people engage with their favourite brands. The dream of personalizing content to all 15 billion phones on the planet is no fairy tale

More than 150,000 businesses, including many of the world's largest companies and mobile operators, use Sinch's advanced technology platform to engage with their customers. Moreover, Sinch has been profitable and fast-growing since its foundation. Sinch's core values are Make it Happen, Dream Big, keep it Simple and Win Together. These values describe how our global organization works and inspire every of our more than 5,000 employees across 60 different countries.

The essence of the role

We are seeking a highly skilled
Voice Architect
with deep expertise in
Asterisk-based telephony systems
to design, implement, and optimize VoIP infrastructure. The ideal candidate will be responsible for architecture, configuration, integration, and performance tuning of enterprise-grade Asterisk deployments, ensuring high availability, scalability, and security.

Who are you?

• Architect, design, and deploy
  Asterisk-based VoIP solutions for enterprise and service provider environments.
• Develop, maintain, and optimize
  dialplans
  , SIP configurations, and call routing logic.
• Integrate Asterisk with
  databases, APIs, CRMs, call center platforms
  , and other telephony systems.
• Perform
  capacity planning
  , scalability assessments, and high-availability architecture design.
• Implement
  SIP trunking
  , VoIP gateways, and interconnects with carriers.
• Monitor and troubleshoot
  call quality, latency, jitter, and packet loss
  issues.
• Create and maintain
  technical documentation, SOPs, and system diagrams
  .
• Collaborate with
  network, security, and application teams
  to ensure seamless integration and compliance.
• Evaluate and implement
  security best practices
  for VoIP, including TLS/SRTP, authentication, and fraud prevention.
• Stay current with
  Asterisk updates, new modules, and VoIP technology trends
  .
• Architect and deploy a
  scalable SIP-based dialer infrastructure
  supporting more then 5,000+ concurrent calls.
• Have successfully integrate AI-based voice bots for automated outbound call flows.
• Have design and implement a custom monitoring stack with
  Prometheus, Grafana, and Homer
  for real-time SIP traffic visibility.
• Need to mentor junior engineers and helped upskill them in
  Asterisk, Kamailio, and SIP protocol
  handling.
• Play a key role in telecom vendor evaluation and onboarding, reducing operational costs

Required Skills & Qualifications

• Bachelor's degree in
  computer science, MCA, Telecommunications, or related field
  (or equivalent experience).
• 10+ years
  of experience designing and managing
  Asterisk-based telephony systems
  .
• Strong understanding of
  SIP, RTP, IAX2
  , and VoIP protocols.
• Hands-on experience with
  Asterisk configuration, dialplan scripting, and AGI/ARI development
  .
• Knowledge of
  Linux (CentOS, Debian, Ubuntu)
  administration.
• Experience with
  network protocols (TCP/IP, DNS, DHCP, NAT)
  and QoS tuning for VoIP.
• Familiarity with
  call recording, IVR systems, voicemail, and conferencing
  .
• Proficiency with
  monitoring and troubleshooting tools
  (Wireshark, sngrep, tcpdump).
• Strong problem-solving, analytical, and documentation skills.

Preferred Skills

• Experience with
  FreePBX, Issabel, FreeSWITCH or other Asterisk-based distributions
  .
• Knowledge of
  SBCs (Session Border Controllers)
  and VoIP security frameworks.
• Scripting/programming skills (
  Linux,Python, Perl, Bash, PHP
  ).
• Familiarity with
  containerization (Docker/Kubernetes)
  for Asterisk deployment.
• Exposure to
  cloud-based telephony platforms
  and APIs (Twilio, AWS Chime, etc.).

Being you at Sinch :

• We're a worldwide group of people, committed to diversity. We're working to offer an increasingly inclusive workplace wherever you are. No matter who you are, you'll be able to explore new career and growth options - sharing your voice, building your path and making it happen with us.
• We're proud to be an equal opportunity employer, and all qualified applicants will be considered to join our team regardless of race, colour, religion, gender identity or expression, sexual orientation, pregnancy, disability, age, veteran status, and more.

Your life at Sinch:

• Being a Sincher is all about learning and being in pursuit of new challenges. Working in the offices, at home, or in a hybrid model, that means celebrating change and the unknown, rolling up your sleeves and seeing what impact you can have on the world. The only way is up, and you'll be reaching for the opportunities that match where you want to take your career. It's closer than you think.
• It's time to chase the answers, chase the challenges and chase the dream.

Are you ready? Join us on our journey