DevOps Engineer - Developer Experience (Lisbon or Berlin based)

1global; Lisboa; On-site; EUR 70,000 - 90,000; Full time

Job summary

1GLOBAL is seeking an experienced DevOps Engineer to help scale our internal developer platform in our Lisbon-focused R&D hub. You will develop internal tools in Go, own observability and CI pipelines, and collaborate with engineering teams across our cloud-native stack.

Join a fast-growing telecom tech company and shape GitOps workflows with Argo CD, Crossplane, and API management. Remote-friendly Lisbon-based hybrid work is supported as part of our dynamic international team.

Qualifications

• 5+ years in DevOps, infrastructure or platform engineering.
• 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).
• Nice to have: Argo CD/GitOps: ApplicationSets, sync strategies, promotion between environments.
• Nice to have: OAuth2/OIDC, JWTs, API management.
• Nice to have: Python as a second language.
• Nice to have: Crossplane Compositions
• Nice to have: Multi-stage Docker builds and image hygiene.
• Nice to have: Writing Operators (kubebuilder/controller-runtime)
• Nice to have: REST API design

Responsibilities

• 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.

Skills

Go

Kubernetes

GitLab CI

Observability

Argo CD

Crossplane

Docker

OAuth2

Python

REST API

Linux

Tools

Go

Job description

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

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)
• REST API design

Why 1GLOBAL?

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 50% year-on-year under the leadership of successful tech entrepreneurs.
• Major Transaction Exposure: Be in the driver’s seat for transactions that will have an impact on the future telco industry.
• Work with a Talented Team: From the Board and the Founders to the Senior Management Team, you will collaborate daily with the most capable and renowned external advisors and constantly being exposed to talented and driven individuals.
• Dynamic Work Environment: Thrive in a collaborative, fast-paced workplace where innovation is encouraged, and every contribution counts.
• Professional Development: Work alongside industry experts to enhance your skills and knowledge in a cutting‑edge field.
• International Experience: Gain opportunities to work in different 1GLOBAL offices around the world as you grow within the company.
• Open Communication Culture: Join a team where your ideas are heard, and open dialogue is encouraged, fostering a supportive and transparent work environment.
• Get Things Done Attitude: Be part of a results-driven team that values efficiency, creativity, and the drive to make a tangible impact in the industry.

1GLOBAL is an equal opportunity employer, we value your character as much as your talent. Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment. We are excited for you to join our mission to revolutionise connectivity globally.

Legal Notice

This job advert and its content are the property of 1GLOBAL and are protected by copyright and other intellectual property rights. Copying, reproducing, republishing or distributing this advert, in whole or in part, without 1GLOBAL’s prior written consent is prohibited. 1GLOBAL reserves all rights and may take appropriate action against any unauthorised use.

Legitimate 1GLOBAL vacancies only redirect candidates to its official application channels, including LinkedIn and Workable, and 1GLOBAL never charges fees or request payments as part of our recruitment process. If you are unsure whether a vacancy is genuine, please refer to 1GLOBAL careers page at https://www.1global.com/vacancies or contact [e-mail].