About the RoleWe are seeking a highly skilled Telephony Engineer with a strong background in modern VoIP platforms, cloud infrastructure, and backend systems development. This role is ideal for an experienced engineer (6+ years) who thrives in a distributed environment and is passionate about building reliable, scalable voice systems.As a remote-first company, we welcome applicants located anywhere in the United States or Canada. You will collaborate closely with engineering, product, and infrastructure teams to design, build, and optimize telephony services that power mission-critical voice applications.At Spinwheel, we’re building the infrastructure that powers intelligent debt management. Our platform is live, revenue-generating, and scaling rapidly, backed by a recent Series A. We’re expanding our engineering organization with leaders who can drive innovation and deliver transformative solutions.Key ResponsibilitiesTelephony Systems EngineeringArchitect, deploy, and maintain Asterisk, FreeSWITCH, and related VoIP platforms.Configure, monitor, and optimize Session Border Controllers (SBCs) for high-availability, secure traffic handling, and interoperability.Develop call routing logic, IVRs, conferencing systems, and SIP trunk integrations.Troubleshoot complex SIP signaling, RTP media, NAT/firewall, and QoS issues.Software DevelopmentBuild backend services and tools using Go, LangChain, and Python.Develop telephony microservices, APIs, automation scripts, and system tooling.Build policies and rules using centralized rules engines.Implement robust CI/CD pipelines and perform code reviews following best practices.Cloud Infrastructure & DevOpsDesign and operate telephony workloads in AWS, leveraging services such as EC2, ECS, Lambda, RDS/Aurora, and S3, VPC, CloudWatch, Terraform.Build scalable, fault-tolerant systems that meet latency, reliability, and security requirements.Implement monitoring, alerting, and incident-response processes for voice systems.Database & Data EngineeringWork with relational databases (RDS/Aurora) to store, query, and optimize telephony-related data.Implement schema design, indexing, and performance tuning.Ensure data integrity, high availability, and effective backup/restore strategies.Cross-Functional CollaborationPartner with product, QA, customer success, and security teams to deliver high-quality telephony features.Participate in on-call rotation and provide Tier-3 support for production escalations.Contribute to team documentation, design proposals, and process improvements.Required Qualifications6+ years of professional engineering experience in telephony/VoIP, backend development, or cloud infrastructure.Expert knowledge of Asterisk, FreeSWITCH, and SIP protocols.Hands-on experience with SBCs (e.g., Oracle/Acme Packet, Kamailio, OpenSIPS).Strong programming skills in Go (Golang) and Python.Experience designing and operating systems in AWS.Proficiency with relational databases and SQL (preferably RDS/Aurora).Deep understanding of telephony protocols: SIP, RTP, SRTP, STUN/TURN/ICE, WebRTC.Strong Linux systems experience (Ubuntu, CentOS, or similar).Familiarity with Docker, Kubernetes, and infrastructure-as-code tools (Terraform/CloudFormation).Excellent troubleshooting, debugging, and performance optimization skills.Ability to thrive in a remote-first environment, with strong communication and collaboration abilities.Preferred QualificationsExperience with: WebRTC signaling/media servers; Kamailio/OpenSIPS/LUA scripting; message queues (Kafka, SQS, RabbitMQ); distributed tracing/observability stacks (Prometheus, Grafana, OpenTelemetry).Understanding of compliance frameworks (SOC2, HIPAA, PCI) in cloud environments.Previous work within a high-growth startup environment.Expert knowledge of SIP, VoIP, Asterisk, and FreeSWITCH systems including coding applications on each of these systems.What We Offer100% remote-first culture (work from anywhere in the US or Canada).Competitive salary and equity packages.Comprehensive health, dental, and vision benefits (country-appropriate).Flexible PTO and paid holidays.Home office stipend.Opportunities for professional growth, technical leadership, and architecture ownership.
28 days ago