Senior Site Reliability Engineer

About this position Blitzy is a Cambridge, MA based AI software development platform on a mission to revolutionize the software development life cycle by autonomously building custom software to unlock the next industrial revolution. We're transforming how enterprises build software, turning enterprise requirements into production-ready code with an agentic software development platform that can autonomously execute 80% of the quantum of software development work. We're backed by multiple tier 1 investors, and have proven success as founders of previous start-ups. Location: Cambridge, MA — Kendall Square HQ (In-Office) The Role As a Senior Site Reliability Engineer at Blitzy's Kendall Square headquarters, you will be a foundational force behind the reliability, scalability, and operational excellence of our AI-powered software development platform. Sitting at the intersection of software engineering and infrastructure, you'll ensure that the systems enabling enterprise customers to autonomously build production-ready software remain performant, resilient, and always available. This is a high-ownership, high-impact role for an engineer who operates with urgency, thinks in systems, and takes pride in building infrastructure that doesn't break. What Success Looks Like Blitzy's platform maintains industry-leading uptime — incidents are rare, and when they occur, they are resolved quickly with clear root cause analysis and lasting fixes. SLOs and error budgets are defined for every critical service and actively used to drive engineering decisions, not just tracked passively. Observability is a first-class capability — engineers across the company have the dashboards, traces, and alerts they need to understand system behavior without asking SRE. Deployment pipelines are fast, safe, and reliable — releases go out with confidence and rollbacks are automated when something goes wrong. Infrastructure is entirely codified — no manual provisioning, no configuration drift, every environment reproducible from source. Engineering teams are more productive because of your work — platform friction is low, developer tooling is sharp, and SRE is seen as an accelerant, not a gatekeeper. You are a trusted technical leader at HQ, influencing how Blitzy thinks about reliability as we scale our platform and our team. Areas of Ownership Design, build, and operate highly available, fault-tolerant infrastructure across cloud environments supporting Blitzy's AI platform and enterprise customers. Define and own SLOs, SLAs, and error budgets for critical services; lead blameless postmortems and drive systemic improvements that prevent recurrence. Build and maintain robust CI/CD pipelines, release automation, and deployment infrastructure that empower engineers to ship with speed and safety. Own the full observability stack — logging, metrics, distributed tracing, and alerting (e.g., Prometheus, Grafana, Datadog, OpenTelemetry). Manage Kubernetes clusters and container infrastructure supporting AI agent workloads and production application services. Drive infrastructure-as-code practices using Terraform; ensure all provisioning is automated, auditable, and version-controlled. Partner with engineering teams at HQ to embed reliability and operational best practices early in the development lifecycle. Lead capacity planning, performance benchmarking, and cloud cost optimization as the platform scales. Required Experience 5–8 years of experience in Site Reliability Engineering, DevOps, or Platform Engineering. Deep expertise in Kubernetes — cluster management, workload deployment, scaling strategies, and troubleshooting in production. Strong proficiency with at least one major cloud platform (AWS preferred); experience designing and operating distributed, high-availability systems. Hands-on Terraform experience for infrastructure-as-code provisioning and management. Proven ability to define and operationalize SLOs, SLAs, and incident response processes. Strong scripting and automation skills in Python, Go, or Bash. Experience designing and maintaining comprehensive observability systems across complex, multi-service environments. Excellent cross-functional communication skills — able to partner with software engineers, product teams, and leadership equally well. What Makes You Stand Out Experience operating infrastructure for AI or ML workloads, including GPU scheduling or model serving infrastructure. Familiarity with MLOps tooling (MLflow, Kubeflow, or similar) and the operational challenges unique to AI-driven services. Knowledge of service mesh technologies (Istio, Linkerd) and advanced networking patterns. CKA (Certified Kubernetes Administrator) certification or equivalent demonstrated expertise. Prior experience at a high-growth startup where you built reliability foundations from the ground up. A track record of influencing engineering culture — not just fixing infrastructure, but raising the bar for how teams think about reliability. What Makes This Role Different Most SRE roles have you defending the status quo. At Blitzy, you're building reliability infrastructure for a platform that is actively rewriting how enterprises create software — there is no playbook, and that's the point. You'll be based at our Kendall Square headquarters, working daily alongside our co-founders and core engineering team, with direct influence over how we architect and operate systems at the frontier of AI. You'll receive meaningful equity, giving you real ownership in a company that is defining a new category. If you want to do the most consequential infrastructure work of your career, this is the role. Our Culture Who we are: Led by two pioneering co-founders we are one of the fastest growing companies in the U.S., creating our own category of enterprise autonomous software development. We automate thousands of hours of software development for our customers, which includes strong representation within the Fortune 500. How we work: We move Blitzy Fast: Time is both our company's and our clients' most precious asset. We move quickly and decisively to innovate internally and deliver exceptional software externally. Championship Mindset: We operate like a professional sports team. We win as a team by holding ourselves and each other to high standards, collaborating in-person, and remaining focused on the mission. Passion for Invention: We're pushing the frontier of what's possible, requiring constant innovation and iteration. We Work for the Customer: We focus on delivering outsized value to the customers we work with and expanding those relationships into deep, meaningful partnerships. We believe in being 'everyday athletes'—taking care of ourselves so we can bring our best minds to work. We promote great sleep, movement, and restorative activities for optimal mental performance. It makes for a happier and more productive team. Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger. #J-18808-Ljbffr Blitzy