Senior DevSecOps Engineer

1GLOBAL is a technology-driven global mobile communications leader, built to help enterprises unlock the full potential of mobile connectivity at scale. Powered by a best-in-class telecom platform – including our own owned and operated global mobile core network, a full end-to-end eSIM technology stack, and an extensive portfolio of telecom licenses – 1GLOBAL operates as a fully regulated telecommunications provider across 40 countries worldwide. Combined with our privileged access to the global wholesale telecom market, this positions us uniquely to deliver seamless, compliant, and scalable connectivity solutions anywhere in the world.  

We serve many of the world's leading banks, enterprises, and digital-first businesses, including neo-banks, fast moving consumer goods companies, travel leaders, and payment service providers. Today, 1GLOBAL connects more than 70 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.  

1GLOBAL is a profitable, fast-growing business. With full-year revenues exceeding US$200 million and profits of over US$25 million, we generate strong cash flows and fund our growth independently—continuously investing in infrastructure, platform innovation, and global expansion. Recent years have marked a defining phase in our journey, with major enterprise and mass-consumer client wins accelerating our evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own telecommunications offerings.  

Founded in 2022 by experienced technology entrepreneurs Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications. We operate as a fully regulated Mobile Virtual Network Operator (MVNO) in 12 countries and as a regulated telecom operator in an additional 28 markets. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, our team of close to 500 experts across 15 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence. 

Position Overview

We are looking for a talented Senior DevSecOps / Cloud Security Engineer to join our Technology Department, with a focus on strengthening and automating our security posture across cloud and hybrid infrastructure. 

As a DevSecOps / Cloud Security Engineer, you will be responsible for embedding security into every stage of our infrastructure lifecycle, from design to deployment. You will lead the implementation of cloud-native security controls in AWS, harden Kubernetes environments, and drive best practices across CI/CD pipelines. Your role includes continuous vulnerability management, network protection, monitoring for threats, and working with development, DevOps and IP teams to ensure secure-by-default practices. You'll also proactively identify risks, secure network perimeters, and automate remediation wherever possible. 

The successfully hired candidate will receive onboarding and training in Lisbon, Portugal; gaining valuable skills while experiencing one of Europe's most dynamic and renowned cities.

Fluency in English is essential for this role. Please ensure your CV is submitted in English as part of your application.

Key responsibilities

• Design, implement, and evolve scalable cloud security controls across AWS multi-account environments using security-as-code principles 
• Own Kubernetes security architecture including workload isolation, RBAC, pod security standards, and network segmentation 
• Embed security automation into CI/CD pipelines, including image scanning, IaC validation, and policy enforcement 
• Continuously assess cloud and Kubernetes environments for vulnerabilities, misconfigurations, and emerging threats 
• Design and maintain strong IAM and secrets management practices, enforcing least-privilege access 
• Partner with DevOps, Platform, and IP/Network teams to deliver security controls as code and by design 
• Analyze network traffic and security telemetry using flow logs, metrics, and targeted packet inspection where required 
• Ensure alignment with internal security policies and external frameworks (CIS, NIST, ISO 27001, etc.) 
• Produce and maintain clear documentation, including security architectures, runbooks, and incident response playbooks 
• Act as a security champion, driving best practices, awareness, and secure engineering culture across teams 

• A minimum of 3+ years Cloud Security / DevSecOps / Infrastructure Security 
• Strong AWS security fundamentals (IAM, KMS, GuardDuty, Config, Security Hub) 
• Solid Linux security and cloud networking fundamentals 
• Hands-on Kubernetes security (RBAC, NetworkPolicies, pod security, image scanning) 
• Infrastructure as Code (Terraform) and Git-based workflows 
• Scripting for automation (Python or Go or Bash) 
• Experience with vulnerability management and container security 
• Security-first mindset with strong troubleshooting skills 
• Experience with WAFs and cloud DDoS protection 
• Comfortable with packet inspection, flow analysis, and traffic monitoring (tcpdump, Wireshark, Suricata, etc.) 

What we offer (this part is for Sao Paulo)?

• CLT contract — enjoy job stability and reliable benefits that value your work
• Quarterly performance bonuses to reward your hard work and achievements
• Meal allowance paid into Caju card — R$100 per working day
• Extended parental leave - 180 days of maternity leave and 20 days of paternity leave.
• Health insurance with SulAmérica — 50% covered by the company
• Daycare allowance provided to mothers with children under 3 years old — R$500 per month per child
• Kickstart your journey with an exciting welcome onboarding trip to one of our European offices (Lisbon or Berlin)
  

Why 1GLOBAL?

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 100% 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.