Full Stack Engineer -CCaaS

At Sangoma, we build the technology that keeps businesses connected. From UCaaS and CCaaS to real-time communications infrastructure, our platforms power millions of conversations every day.

Our engineers operate with trust, autonomy, and accountability. We move with purpose, collaborate across teams, and take responsibility for outcomes, not just output.

You won’t just contribute code. You’ll own services. You’ll solve meaningful problems. You’ll help raise the bar.

Our Call Center Engineering team is looking for a Full Stack Engineer to help evolve the services and infrastructure behind Sangoma’s CCaaS platform. You will work across the stack, partnering with product, platform, and voice engineering to deliver reliable, scalable customer experience capabilities. As a CX Full Stack Engineer at Sangoma, you will build the services and experiences that power real-time conversations for companies around the world. The work you do directly impacts reliability, usability, and the speed at which we deliver innovation across our CCaaS platform.

We are open to hiring this role in Brazil as a contractor or Colombia as full time employee.

• Design, build, and evolve core capabilities of Sangoma’s Contact Center as a Service platform that support real-time customer interactions.
• Own features end-to-end across backend, frontend, and infrastructure, from initial design through production, monitoring, and iteration.
• Develop modern service and user experiences using Python and JavaScript frameworks such as FastAPI, React, and Vue.
• Partner closely with product and engineering teams to deliver scalable, high-performance solutions that improve customer experience and agent workflows.
• Integrate application services with FreeSWITCH using SIP and WebRTC to power voice and digital engagement.
• Work within an event-driven architecture leveraging PostgreSQL, Redis, and Kafka to support real-time workloads at scale.
• Write clean, maintainable, well-tested code and contribute to improving engineering standards and best practices.
• Improve observability, reliability, and performance of the services you own.
• Participate in a shared on-call rotation and take responsibility for platform stability and continuous improvement.

• Strong experience building backend services in Python using frameworks such as FastAPI, Flask, or Django.
• Solid frontend development experience with JavaScript and modern frameworks such as React or Vue.
• Experience designing, delivering, and operating complex web applications in production environments.
• Hands-on experience with Docker and familiarity with orchestration approaches; Kubernetes exposure is a plus.
• Experience working with relational databases such as PostgreSQL and caching technologies like Redis.
• Understanding of real-time or event-driven systems using Kafka, RabbitMQ, or similar technologies.
• Experience building and operating scalable cloud-based systems (AWS or similar).
• Comfortable working with Git and modern collaborative development workflows.
• Experience working effectively in distributed, remote engineering teams.
• Strong written and verbal English communication skills.

• Experience with real-time communications technologies including FreeSWITCH, SIP, or WebRTC.
• Exposure to Elixir and Phoenix.
• Experience working in microservices or distributed architectures.
• Familiarity with CI/CD pipelines, automated testing strategies, and modern release practices.