• Designing and building tools and applications to extend Calendly’s infrastructure platform • Evaluating and guiding the development of applications across the organization • Exercising deep expertise in cloud infrastructure concepts and patterns • Offering and evangelizing patterns for application teams to consume for cloud native applications development • Fostering a collaborative environment of learning and knowledge dissemination

• Du entwickelst und betreibst unsere souveräne LLM-Plattform inklusive OpenAI-kompatiblem Gateway, Modell-Serving und GPU-Infrastruktur • Du implementierst kundenspezifische Wissensanbindungen (RAG) mit Vector-Datenbanken, Embeddings und Reranking • Du stellst Kostenkontrolle, Mandantentrennung, Datenschutz und Guardrails sicher • Du etablierst Monitoring und Observability für Performance, Qualität und Nutzung der KI-Dienste • Du betreibst und entwickelst unsere containerbasierte Plattform auf Basis von Docker, Coolify und Kubernetes weiter • Du automatisierst Deployments und verantwortest CI/CD-Prozesse für unsere Eigenentwicklungen • Du betreust unsere Linux-, Cloud- und Datenbank-Infrastruktur und sorgst für Stabilität, Sicherheit und Verfügbarkeit • Du baust Monitoring-, Logging- und Alerting-Lösungen auf und entwickelst diese weiter • Du gestaltest die Architektur unserer Plattform- und KI-Services aktiv mit • Du etablierst Infrastructure as Code und standardisierte Deployment-Prozesse • Du sorgst für datenschutzkonforme und mandantensichere Betriebsmodelle • Du dokumentierst Lösungen, teilst Wissen im Team und evaluierst neue Technologien im Bereich Platform Engineering und KI

• Architect and maintain scalable runtime production environments across cloud-native and containerized systems, including transforming applications into Kubernetes-friendly formats for bare-metal deployment • Own the technical roadmap for the platform vertical, identifying gaps, planning initiatives, and aligning engineering effort to mission objectives • Provide mentorship to engineers across the team, fostering professional development and raising the technical bar • Identify technical overlap across projects and guide teams on leveraging each other for efficient delivery • Work closely with Mission Managers, providing insights on engineering competency, capacity, velocity, and alignment with mission objectives • Collaborate with product teams, providing feedback on product fit and contributing to product direction based on production usage • Work with customers to define technical roadmaps that align to mission objectives • Advocate for and enforce DevSecOps practices across the platform layer, including security automation, container security, and compliance • Evaluate and select optimal methods for solving complex business problems, assessing new products and their potential impact on mission objectives • Drive continuous improvement in CI/CD pipelines, deployment patterns, and operational tooling

• Design, build, test, and operate distributed backend services and APIs that support high-volume customer interactions. • Take end-to-end ownership of platform work, from framing ambiguous problems and shaping technical plans through implementation, rollout, and production support. • Improve reliability, scalability, latency, and cost across shared platform systems that serve teams across the business. • Partner closely with Product, SRE, and peer engineering teams to deliver platform improvements without destabilizing live traffic. • Participate in on-call, incident response, troubleshooting, and continuous improvement of alerting, runbooks, deployment quality, and capacity planning. • Raise engineering standards through code reviews, design reviews, pairing, documentation, and mentorship for other engineers on the team.