DevOps Engineer - Developer Experience (Lisbon or Berlin based)

About Us 1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries. Founded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses. Headquartered in the Netherlands, with R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 550 professionals across 16 countries. With annual revenues exceeding US$200 million and a strong track record of profitability, we continue to invest in innovation, infrastructure, and international expansion as we redefine the future of global mobile connectivity. About the DevOps department Our DevOps department has three teams. Each owns one layer of the platform: Foundations (ROOT): machines, operating systems, virtualisation, VPNs and databases. Cloud-Native Infra (CLOUD): cloud accounts, Kubernetes clusters, networking, identity and shared platform services. Developer Experience (DEVX): pipelines, GitOps, internal tooling, observability and APIs used by engineering teams every day. About the Team DEVX builds the tools and workflows our engineering teams use to ship software. That covers pipelines, GitOps, internal CLIs, observability and API management. Our tooling is written in Go. We own: GitLab CI pipelines, Stack CLIs and internal tooling, Argo CD, Crossplane Compositions, metrics, logs, tracing, profiling, alerts and dashboards, API management, OAuth2 clients and the Governance API, our internal developer platform We don't own: cloud accounts, clusters, networking, the service mesh, Crossplane providers and XRDs (CLOUD), GitLab instance upgrades and VMs. Your first 6 months Improve observability across the platform: alert quality, performance and data-transfer optimisation. Take ownership of our Internal tools and the shared pipeline templates our developers use. Help migrating the remaining deployments to GitOps with Argo CD. About the role Develop Internal tools in Go. Own metrics, logs, alerts and dashboards, and help teams decide what to measure. Build and maintain GitLab CI pipelines and shared templates. Run Argo CD and GitOps workflows across environments. Write Crossplane Compositions on top of XRDs. Manage APIs, OAuth2 clients and the Governance API. Help shape our internal developer platform. Requirements Requirements About You Must Have 5+ years in DevOps, infrastructure or platform engineering, including ownership of production systems and on-call. You write design docs, reason about trade-offs, and mentor other engineers. Fluent English, written and spoken. Please send your CV in English. Solid fundamentals in compute, networking and storage, and you're at home on Linux. Go as your main language: production code with tests and releases, and CLIs or services you maintain. Observability: Grafana, Prometheus, Thanos, Loki, Tempo, Pyroscope and alerts that people actually trust. GitLab CI at scale: shared templates, includes, runners, pipeline security. Helm and Kustomize. Kubernetes from the workload side: CRDs and debugging deployments. You treat developers as customers, with clear docs, feedback loops and attention to adoption. Nice to Have OpenTelemetry or distributed tracing (Tempo, Jaeger). Argo CD/GitOps: ApplicationSets, sync strategies, promotion between environments. OAuth2/OIDC, JWTs, API management. Python as a second language. Crossplane Compositions Multi-stage Docker builds and image hygiene. Writing Operators (kubebuilder/controller-runtime) R