Senior Software Engineer

Role:

Experience:

Location:

Role Overview:

As a Senior Software Engineer, Telephony in the Product Engineering team, you will be responsible for the design, implementation, testing, maintenance, and optimization of software solutions in the telephony and voice technology domain. You will gather product requirements from Product Management and turn them into working software that satisfies market needs. You will develop, revise, and maintain software artifacts and product engineering processes/methodologies to meet functional, scale, and performance criteria.

Key Responsibilities:

• Innovative Software Development:

  Utilize cutting-edge software development tools to drive innovation, efficiency, and quality in applications for a commercially hosted Asterisk platform, with a focus on Mobile/GSM integration and Speech Recognition engine integration.

• Problem Solving and UX Delivery:

  Address challenging problems to deliver impactful UX solutions quickly, efficiently, and with high quality.

• Scalable Systems Architecture:

  Contribute to the evolution of systems architecture, ensuring scalability with growing business demands.

• Collaborative Cross-Functional Work:

  Share knowledge and communicate effectively across the organization to align feature development with overall business objectives.

• Problem Identification and Resolution:

  Analyze, identify, and resolve problems or bugs to ensure a seamless and error-free user interface.

• Active Participation in Agile Processes:

  Engage actively in Agile team meetings, contributing to iterative development processes and adhering to best practices.

• Production Support:

  While not on an official on-call roster, be available to assist with Severity 1 or 2 production issues, leveraging domain knowledge and skills to resolve critical incidents.

Skills / Expertise Required:

• Design, develop, and maintain VoIP solutions using Asterisk/FreeSWITCH.
• Write, test, and deploy RESTful APIs using Python (Flask) to support telephony features.
• Configure dial plans, call routing, IVRs, queues, and SIP trunks.
• Monitor and troubleshoot call quality, performance, and server logs.
• Develop scripts or tools to automate provisioning and reporting.
• Collaborate with front-end developers, DevOps, and QA to deliver full-stack features.
• Ensure system security, scalability, and high availability of VoIP services.

Required Skills & Qualifications:

• 3+ years of experience with Asterisk/FreeSWITCH (ARI, AGI, AMI).
• Strong proficiency in Python and Flask for developing APIs and writing unit tests.
• Solid understanding of VoIP protocols: SIP, RTP, WebRTC.
• Experience with MySQL or other relational databases.
• Familiarity with Linux server environments.
• Proficiency with tools like Wireshark, TCPDUMP, or SNGREP for SIP troubleshooting.
• Knowledge of JSON, REST, and API security practices.
• Ability to read and write custom DIALPLAN and manage SIP/PJSIP Profiles.
• Version control using Git.
• Exposure to contact center or call center environments is beneficial.
• Experience with Python scripting involving multi-threading, sockets, and inter-process communication.
• Strong understanding of databases, performance, and optimization (MySQL required).
• In-depth knowledge of web technologies: HTTP, HTML, CSS, AJAX, REST, JSON.
• Strong knowledge of SIP and VoIP communications.
• Experience with Linux, Docker containers, SMS, and Mobile Gateways.
• Excellent written and verbal English communication skills.

Experience Required:

• 5–7+ years in a Full Stack Development role