Sr. Software Engineer, Site Reliability

About Poshmark

Poshmark is a leading fashion resale marketplace powered by a vibrant, highly engaged community of buyers and sellers and real-time social experiences. Designed to make online selling fun, more social and easier than ever, Poshmark empowers its sellers to turn their closet into a thriving business and share their style with the world. Since its founding in 2011, Poshmark has grown its community to over 130 million users and generated over $10 billion in GMV, helping sellers realize billions in earnings, delighting buyers with deals and one-of-a-kind items, and building a more sustainable future for fashion.

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Job Title:
Sr. Software Engineer SRE/Dev Ops

Poshmark is seeking a highly skilled and collaborative Staff Software Engineer to join our Tools & Infra Dev Ops (SRE) team. In this role, you will help shape

and drive the platform that powers developer velocity, CI/CD workflows, and non-production infrastructure reliability  will lead key

initiatives improving automation, observability, and deployment efficiency — helping engineering teams deliver high-quality software with

confidence.

This is a high-impact role where you will influence architecture, mentor engineering teams, and define technical standards that elevate our

operational excellence across Poshmark.

• Lead design and development of scalable CI/CD systems enabling efficient and reliable delivery for multiple engineering teams
• Architect, automate, and optimize non-production infrastructure to improve developer productivity, reliability, and environment consistency
• Implement enhanced observability and monitoring solutions to reduce MTTR and proactively improve system health
• Drive Dev Ex improvements including remote dev environments, build optimizations, and automation workflows
• Champion infrastructure-as-code standards (Terraform, Ansible, etc.) for repeatable and secure deployments
• Collaborate with cross-functional stakeholders (Security, QA, Data Engineering, Platform teams) to align reliability and operational goals
• Lead key explorations of emerging tools and technologies to evolve the platform (e.g., Git Hub Actions, ArgoCD, service mesh, logging modernization)
• Mentor engineers on Dev Ops best practices, fostering strong engineering culture, quality, and ownership
• Serve as an escalation point during production-like issues in non-prod environments to ensure rapid resolution
• Influence roadmap prioritization with data-driven decision making

• Deliver meaningful improvements in CI stability and runtime performance
• Increase developer feedback velocity by reducing pipeline execution times
• Strengthen observability capabilities across non-production environments
• Provide architecture guidance and secure automation for key platform enhancements

• Mature the developer experience platform with measurable improvements in engineering throughput
• Lead modernization of CI/CD tech stack with self-service capabilities
• Drive multi-environment reliability initiatives leading to reduced incidents
  
  Establish best practices and reusable frameworks adopted across teams

• 5–8+ years of experience in Dev Ops, SRE, or Infrastructure Engineering roles
• 7+ years engineering experience with majority focused on Dev Ops, SRE, or Platform Engineering
• Strong Kubernetes expertise (workload orchestration and cluster-level debugging)
• Proven experience architecting CI/CD systems at scale (Jenkins/Git Hub Actions/Spinnaker)
• Hands‑on experience with automation tools:
  Terraform, Helm, Ansible, etc.
• Solid understanding of distributed systems, monitoring, and operational excellence
• Proficient in Python, Bash, Golang, or Ruby for automation
• Strong leadership communication skills with ability to mentor and influence
• Track record of driving impactful technical initiatives end‑to‑end