Senior DevOps Engineer

More than 30,000 subscription apps run on Adapty: $5B in revenue tracked, 4B users served, 80B API calls a month. That's one of the richest datasets in the app economy. Our mission is simple: make apps rich.We are a team of 210+ passionate, product-driven people who love solving big challenges. Backed by top investors like 500 Startups and Surface Ventures, we are building one of mobile's fastest-growing SaaS companies and aiming for number one worldwide. Why this role matters Adapty runs on infrastructure we own and operate ourselves: a Proxmox and Ceph platform across OVH, Hetzner and bare metal, with parts of the stack in AWS and GCP. That platform processes billions of dollars of subscription volume a year, and today too much of it depends on a single engineer. You are joining to take that platform over: fully owned, fully described in code, and cheap to run at scale. In your first months you will own Proxmox and Ceph end to end, drive resource rightsizing, and lead the split of our development workloads into a separate cluster. What you'll do Own our Proxmox and Ceph platform end to end — capacity, upgrades, performance and incident responseRun infrastructure across OVH, Hetzner and bare metal, alongside workloads in AWS and GCPDrive resource rightsizing: find where we overpay, size it correctly, and prove the saving in the billsLead the separation of development workloads into a dedicated cluster, without downtime for productionKeep everything as code — Terraform, Ansible, ArgoCD and GitLab CI, with no manual changes in productionOwn reliability: on-call, incident response, root cause analysis and the runbooks that followSupport the data layer our product runs on — PostgreSQL, ClickHouse, AerospikeAbout you 10+ years working with infrastructure and physical hardware, not only managed cloud5+ years running Kubernetes and cloud platforms in productionHands-on with bare metal and providers like OVH and Hetzner, plus AWS and/or GCPStrong with Terraform, Ansible, ArgoCD and GitLab CI — you describe infrastructure in code by defaultReal FinOps experience: you can name what infrastructure cost before and after you touched itYou take problems all the way to the root cause and to the fix, including outside your formal scopeYou say things directly — risks and bad news arrive early, not after the incidentNice to have Production experience with Proxmox and Ceph specificallyPostgreSQL, ClickHouse or Aerospike at scaleExperience splitting shared environments into isolated clustersBuilding observability and on-call practice from scratchHigh-load B2B SaaS backgroundWhat's in it for youStrong product with industry-best metrics. Adapty is among the top 5% fastest-growing SaaS companies.Exceptional compensation directly tied to your results.Direct communication and ownership. No bureaucracy, no politics, just impact.Flexible remote work. Join us from anywhere or work onsite in our Belgrade or London offices.Professional support. Language learning, sports, health insurance, laptop coverage, and more.