Application Support Engineer

Cresta unlocks the true potential of the customer experience, turning every conversation into a competitive advantage. Cresta’s unified AI platform combines conversational AI agents, real-time human agent augmentation, and comprehensive conversation intelligence to drive revenue and efficiency gains across every channel. The world’s leading companies, including United Airlines, Cox Communications, and Marriott, use Cresta to power world-class customer experiences every day. Born from the Stanford AI Lab, Cresta has raised more than $270 million from the world’s leading investors, including a16z, Greylock, and Sequoia. Cresta’s leadership includes some of the leading minds in AI today. Our CEO, Ping Wu , founded and led Google's Contact Center AI and Vertex AI platforms before joining Cresta to build the future of AI-driven customer experiences. Over the next few years, AI is going to redefine how people all over the world interact with businesses every day. Come build that future at Cresta. Schedule: Monday–Friday, 4:00 PM – 12:00 AM Weekend Rotation: Required every other weekend (full weekend coverage) About the role: We are seeking a highly motivated and technically proficient Application Support Engineer to join our growing Customer Success team. This role is ideal for individuals who enjoy solving complex technical challenges, assisting customers, and serving as a crucial link between our customers and product development. You will be instrumental in ensuring a smooth and successful customer experience by transforming complex issues into clear, actionable solutions. What You'll Do: Technical Issue Resolution: Investigate, diagnose, and resolve intricate technical issues related to API integrations, databases, servers, microservice performance, web hosting, telephony and network technologies, and containerized applications. Customer Advocacy: Serve as the primary technical point of contact for customer inquiries, providing clear, concise, and empathetic communication via email and our support portal. Collaboration & Escalation: Partner closely with Engineering, Product, and Sales teams to escalate bugs, feature requests, and critical incidents, ensuring timely resolution and feedback. Knowledge Management: Create and maintain comprehensive documentation, FAQs, and knowledge base articles to empower both customers and internal teams. Issue Reproduction & Testing: Replicate customer environments and issues to identify root causes and verify solutions. Product Expertise: Develop deep product knowledge, understanding architecture, functionality, and common use cases. Process Improvement: Identify recurring issues and contribute to process enhancements that improve the customer support experience and product quality. On-Call Support: Participate in a rotational on-call schedule for urgent issues outside regular business hours. What You'll Bring: 2-4 years of experience in a technical support, helpdesk, or customer-facing engineering role. Strong problem-solving and analytical skills, with the ability to deconstruct complex issues. Excellent written and verbal communication skills, capable of translating technical details for both technical and non-technical audiences. Proficiency in: Web hosting technologies. APIs (automation, collaboration, and data extraction/changes through HTTP methods). Application log analysis. Experience with support ticketing systems (e.g., Zendesk, Linear, JIRA). A customer-centric mindset with a genuine desire to deliver excellent service. Ability to work independently and collaboratively in a fast-paced environment. Bonus Points If You Have: Experience managing or integrating SaaS applications or CCaaS platforms (e.g., Avaya, Five9, Genesys) and telephony infrastructure. Experience with cloud-based hyperscaler solutions (e.g., AWS S3/RDS/EKS for file repositories and databases). Familiarity with Kubernetes for containerized applications. Basic scripting skills (e.g., Python, PowerShell, Bash) for auto