Senior Telephony Engineer

Job Summary:

We are seeking an experienced and entrepreneurial Senior Telephony Engineer with a strong background in telephony integrations. The ideal candidate is highly product-minded and capable of making strategic decisions that drive telephony integrations. You will play a pivotal role in building robust software solutions while setting high engineering standards for the team.

Key Responsibilities:

• Telephony Integrations: Design and develop integration solutions for various telephony systems and applications, including VoIP, PBX, and cloud-based telephony.
• Strategic Decision-Making: Collaborate with cross-functional teams to make informed product decisions that enhance user experience and business value.
• Technical Leadership: Implement and test integration solutions to ensure functionality, performance, and adherence to security protocols.
• Troubleshooting: Monitor and troubleshoot integration issues, providing timely resolutions and maintaining system uptime.
• Documentation: Document integration processes, workflows, system configurations, and security protocols.
• Emerging Technologies: Stay updated with industry trends and emerging technologies in telephony and integration to enhance strategies and adopt innovative solutions.
• Mentorship: Guide and mentor junior engineers to develop their technical and professional skills.
• Collaboration: Work closely with product managers, designers, and other stakeholders to align technical solutions with business goals.
• Performance Optimization: Ensure the scalability, security, and performance of applications.

Qualifications:

• Education: Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• Experience: 7 years of professional software development experience focused on designing, implementing, and maintaining communication systems, particularly those involving telephony and voice technologies
• Technical Expertise:
• Proven experience in designing, implementing, and maintaining telephony integration solutions is needed.
• A strong understanding of VoIP protocols (e.g., SIP, RTP, H.323), PBX systems, audio encoding, and cloud-based telephony solutions is essential.
• Proficiency in programming and scripting languages such as Java, Python, and SQL is expected.
• Experience with networking fundamentals, including TCP/IP, DNS, DHCP, and security best practices for telephony and server administration, is preferred.
• Familiarity with industry standards and protocols like REST, SOAP, and EDI is beneficial.
• Strong analytical, problem-solving, and troubleshooting skills are necessary.
• Excellent communication and collaboration skills are required to work effectively with cross-functional teams and stakeholders.
• Relevant certifications (e.g., Cisco CCNA, CompTIA Network , Avaya Certified Implementation Specialist) are a plus.

Preferred Qualifications:

• Experience with cloud platforms (AWS) and their integration services.
• Familiarity with microservices architecture and containerization (Docker, Kubernetes).
• Knowledge of CI/CD pipelines and tools (Jenkins, Git).
• Experience with monitoring tools (e.g., Grafana, Prometheus, or OTEL) for tracking API performance and metrics. Experience building Grafana dashboards.
• Experience with telephony signalling (SIP, SIPREC, RTP, CTI). Specifically building SIPREC (SRS) Session Recording Servers.
• Experience building Grafana Dashboards.
• Experience with integrating metrics with Grafana Alloy.
• Experience creating, using, and maintaining testing rigs for functional testing, smoke testing, and load testing.

Soft Skills:

• Product Mindset: Proven ability to make strategic product decisions with a focus on user needs and business impact.
• Entrepreneurial: Experience taking ideas all the way from ideation to execution. Instead of waiting for tasks, you’re proactively identifying areas of opportunity and building them out.
• Problem-Solving: Excellent analytical and problem-solving abilities.
• Communication: Strong verbal and written communication skills; ability to articulate complex technical concepts to non-technical stakeholders.

How we work:

• Small, cross‑functional pods with a tech lead (engineering owns sprint tickets; product owns the what/why and outcomes).
• Bias to prototype → validate → build; instrument everything; learn fast.
• High autonomy, high bar, candid feedback, low politics.
• Hybrid: 3 days/week in our West Loop office; occasional travel for customer meetings and team on-sites.

Compensation & benefits:

Competitive base equity; comprehensive health benefits; flexible PTO.

XSELL is committed to a culture of teamwork; where everyone works together to plan, do, learn, and continuously improve. We accomplish that by staying true to our core values.

• Best Chapter: Every XSELLer is plugged in and focused on writing their “best chapter yet”, both personally and professionally. We believe in working hard to achieve success, but that success only comes if we are doing it together. We do this with a high level of humility, integrity, and compassion towards our coworkers. We celebrate and recognize each other and have a lot of fun along the way.
• Know Us By Our Results: We do what we say and say what we do. Our coworkers and clients will “know us by our results” – we welcome that and embrace transparency and measurement.
• Do It The XSELL Way: Together we are building an inclusive culture full of top-performing, talented people that are striving towards common goals with resilience. People will admire not only the work we do but also that we “do it the XSELL way” – as one team. We do this through strong communication, collaboration, and accountability to each other.
• Open for Business: We are always “open for business” – fiercely committed to improving ourselves, our team, and our company. We stay curious and approach every situation as an opportunity to learn and grow.
• Conversations Happen In the Room: Feedback is imperative to our collective success. We approach the “conversation in the room” with respect, empathy, and candor. Our dialogue with each other is always open and honest.

XSELL Technologies is an Equal Employment Opportunity Employer and all employment decisions shall be made without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by federal, state, or local law.

We are committed to the full inclusion of all qualified individuals. As part of this commitment, we will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, perform essential job functions, and/or receive other benefits and privileges of employment, please contact us.