• Understand how all Telephony services work and how they are integrated to the platform. • Operate, maintain, expand and support SIP proxies based on Kamailio or OpenSIPS applications. • Handle level 3 troubleshooting escalations and triaging. • Analyze telephony traffic patterns and identify issues and anomalies. • React to critical alerts in order to rapidly return to a full-service state. • Troubleshoot and resolve voice and network protocol communication issues. • Interface with partner organizations for interconnections and expansions. • Design, build, test, deploy and maintain monitoring, alerting, QA and logging tools for Telephony applications. • Coordinate system maintenance and deployment events.

About Telnyx Telnyx is an industry leader that's not just imagining the future of global connectivity—we're building it. From architecting and amplifying the reach of a private, global, multi-cloud IP network, to bringing hyperlocal edge technology right to your fingertips through intuitive APIs, we're shaping a new era of seamless interconnection between people, devices, and applications. We're driven by a desire to transform and modernize what's antiquated, automate the manual, and solve real-world problems through innovative connectivity solutions. As a testament to our success, we're proud to stand as a financially stable and profitable company. Our robust profitability allows us not only to invest in pioneering technologies but also to foster an environment of continuous learning and growth for our team. Our collective vision is a world where borderless connectivity fuels limitless innovation. By joining us, you can be part of laying the foundations for this interconnected future. We're currently seeking passionate individuals who are excited about the opportunity to contribute to an industry-shaping company while growing their own skills and careers. About You As a VoIP Engineer you understand how the Telnyx Telephony Engine works as whole, while also being able to identify each underlying service and its purpose. You use this knowledge plus your experience working with VoIP technologies to design new features and guide software developers on their implementation. You assist other teams by triaging escalated issues and then working with all the involved parties until they are resolved. You are the subject matter expert for all topics that are telephony related, and when you don't know the answer you will know who to ask. The Opportunity You work with users around the globe, where you help by solving their communications challenges. You’ll also get to work with other engineers to build delightful features that span various parts of the system, as well as our business, sales, and operations teams to understand and solve our users’ pain points. We’re looking for people with a strong background in VoIP technologies and interest in building successful products or systems; you’re comfortable in dealing with lots of moving pieces; you have exquisite attention to detail; and you’re comfortable learning new technologies and systems. - Understand how all Telephony services work and how they are integrated to the platform. - Operate, maintain, expand and support SIP proxies based on Kamailio or OpenSIPS applications. - Handle level 3 troubleshooting escalations and triaging. - Analyze telephony traffic patterns and identify issues and anomalies. - React to critical alerts in order to rapidly return to a full-service state. - Troubleshoot and resolve voice and network protocol communication issues. - Interface with partner organizations for interconnections and expansions. - Design, build, test, deploy and maintain monitoring, alerting, QA and logging tools for Telephony applications. - Coordinate system maintenance and deployment events. Who we're looking for - A degree in Computer Science, Information Technology, Telecommunications or similar. - Strong understanding of IP telephony (VoIP), TCP/IP Networks and related protocols (SIP, RTP, RTCP, ISUP, TLS, STUN, TURN, WebRTC). - Experience with Open Source VoIP applications such as Kamailio, OpenSIPS, FreeSWITCH, RTPEngine, Asterisk and open source tools such as Wireshark, sngrep and Homer. - Experience with Linux, Open Source tools and shell scripting. - Experience with containers and automation/orchestration tools such as Docker, Ansible, Jenkins, Kubernetes. - Familiarity with programming in Python, Elixir or Go are a plus. #LI-JB1 #LI-Remote

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together. This Principal Site Reliability Engineer is a senior individual contributor role responsible for defining and driving reliability strategy across complex, large-scale digital platforms. The role partners closely with engineering, security, and technology operations leaders to embed resilience, stability, and operational excellence into systems from design through production. While not a people manager, this role provides technical leadership and strategic influence, guiding priorities, shaping standards, and advising senior stakeholders to improve availability, performance, and risk posture across the enterprise. If you are located in MN or AZ, you will have the flexibility to work remotely*, as well as work in the office as you take on some tough challenges. Primary Responsibilities: - Leadership and Strategy - Develop and execute a comprehensive strategy for SRE and TechOps aligned with organizational goals, with a focus on improving stability, security, and supportability of all digital properties - Provide technical leadership, mentorship, and strategic guidance to engineers and partner teams - Collaborate with cross-functional leaders and engineering teams to integrate best practices into all aspects of products and platforms, with 'baking in' resilience from design to deployment - Guide teams on priorities, mentor individual contributors, and report to CIOs on critical paths, mitigation plans, and strategic initiatives - Site Reliability Engineering (SRE) - Oversee teams to map and proactively secure and harden end-to-end customer journeys across all business units - Analyze and model dependencies (applications, APIs, infrastructure) and run threat models for various risks, including natural disasters, cyberattacks, and software failures - Develop and enforce reliability standards, including Service Level Agreements (SLAs), Service Level Indicators (SLIs), and Service Level Objectives (SLOs), utilizing these key metrics to continuously improve system reliability and performance and prioritize work - Implement automation to reduce manual tasks, enhance operational efficiency, and design resilience features such as automated failovers, geo-redundancy, circuit breakers, and automated rollbacks - Ensure minimal downtime and optimal performance of systems through proactive risk threat modeling and mitigation - Technology Operations (TechOps) - Ensure the stability, scalability, and resilience of the technology infrastructure, including hardware, software, and network operations - Develop and maintain robust processes for infrastructure provisioning, configuration, and maintenance - Promote a culture of continuous improvement and innovation, optimizing processes and accelerating technology delivery You’ll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in. Required Qualifications: - Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience - 15+ years of experience in software engineering, site reliability engineering, and technology operations - Solid knowledge of infrastructure management, system monitoring, incident response, software engineering principles, and security frameworks at scale. Demonstrated history of remediating technology infrastructure issues at the root cause - Proven exceptional leadership, communication, and collaboration skills, with the ability to translate complex technical issues into clear, concise, and impactful communications for C-suite and executive leadership - Proven ability to thrive in a fast-paced, dynamic environment and effectively manage multiple high-priority situations simultaneously Preferred Qualifications: - Solid vendor relationship management experience - Experience with operational and security tools and technologies (e.g., monitoring systems, automation tools, SIEM, IDS/IPS) - Proven track record of developing and implementing successful strategies in a global digital consumer environment *All employees working remotely will be required to adhere to UnitedHealth Group’s Telecommuter Policy Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you’ll find a far-reaching choice of benefits and incentives. The salary for this role will range from $134,600 to $230,800 annually based on full-time employment. We comply with all minimum wage laws as applicable. At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone–of every race, gender, sexuality, age, location and income–deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes — an enterprise priority reflected in our mission. UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations. UnitedHealth Group is a drug - free workplace. Candidates are required to pass a drug test before beginning employment.

About Fable  Global enterprises work with Fable to make products more accessible for over one billion people who live with disabilities. Our customers include global leaders like Walmart, Slack, and Shopify. Fable was featured on the Forbes Accessibility 100 list in 2025, awarded Fast Company’s Most Innovative Companies in Design, and has received accolades from global entities like the World Summit Awards and the UN-endorsed Zero Project.  About the role  As a Senior Site Reliability Engineer at Fable, you will play a critical role in ensuring the reliability, scalability, and efficiency of our platform as we continue to grow.  Fable’s products support organizations in building more accessible digital experiences, and the reliability of our infrastructure is essential to delivering that impact. You will work across our platform and product systems to ensure they are stable, performant, and cost-efficient, while enabling teams to move quickly and safely.  As AI-powered capabilities increasingly become part of modern product experiences, you will also help ensure Fable’s infrastructure is ready to support AI workloads—balancing reliability, performance, and cost while enabling teams to safely experiment and scale new capabilities.  Reporting to the Director of Technical Operations, this role works closely with teams across Engineering and Product. It is ideal for someone who enjoys hands-on technical work while taking ownership of system health, tooling, and operational excellence, and who is excited to help shape Fable’s approach to infrastructure, reliability, and platform engineering over time.  Responsibilities  Reliability, Infrastructure & Platform  - Design, build, and maintain reliable, scalable, and secure infrastructure for Fable’s product services  - Improve system observability, monitoring, and alerting to ensure high availability and fast incident response  - Contribute to and evolve SRE practices, including SLIs/SLOs, incident management, and postmortems  - Support and improve CI/CD pipelines and deployment processes  - Identify and reduce operational complexity across systems and tooling  - Work across infrastructure and application layers to diagnose and resolve reliability and performance issues, including making targeted improvements to application code when needed  - Support infrastructure and platform capabilities required for AI/ML-powered features, including scaling, performance, and reliability considerations  Cost Efficiency & Performance  - Monitor and optimize infrastructure costs across cloud environments  - Contribute to capacity planning and cost forecasting for infrastructure and services  - Identify opportunities to improve performance and efficiency at the system level  - Evaluate and optimize the cost and performance of compute-intensive workloads (e.g., AI/ML services), ensuring efficient resource usage and scalability   Vendor & Tooling Ownership  - Work with third-party vendors and tools that support Fable’s infrastructure and operations  - Help evaluate, select, and manage tools and services to support platform reliability and scalability  - Support vendor-related troubleshooting and ongoing service improvements  Cross-functional Collaboration  - Partner with Engineering teams to improve reliability, performance, and operational readiness of new features  - Partner with application engineering teams to improve service architecture, performance, and observability, and help define best practices for building reliable, scalable systems  - Act as a point of support and escalation for production issues  - Collaborate across teams to manage dependencies and ensure smooth system operations  Team & Practice Development  - Contribute to building strong SRE and operational practices across the organization  - Share knowledge through documentation, pairing, and technical discussions  - Help onboard and support more junior team members as the team grows  - Contribute to improving ways of working within the team and across Engineering