Senior AI Engineer

About Us

1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. Powered by a best-in-class telecom platform – including its own owned and operated global mobile core network, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses – 1GLOBAL operates as a fully regulated telecommunications provider across 40 countries worldwide.

We serve many of the world’s leading banks, enterprises, and digital-first businesses, including neo-banks, global 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 in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest 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 aspirations to offer telecommunications services to their clients.

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.

About the Team

We are building a new AI team within Engineering, tasked with driving AI adoption across 1GLOBAL. The team’s primary mission is to design and operate an internal AI and knowledge platform that makes our collective knowledge accessible, searchable, and actionable. Beyond the internal platform, the team will contribute AI-powered capabilities to our commercial product lines.

You will be one of the first engineers on this team, working alongside a dedicated product manager. This is a foundational hire: you will set the technical direction, make early architectural decisions, and build the systems that the rest of the AI function will grow on.

About the Role

• Design and build 1GLOBAL’s internal AI platform: RAG pipelines, vector search infrastructure, and conversational interfaces.

• Evaluate, integrate, and operate large language models (open-source and cloud-hosted) in production, balancing accuracy, latency, and cost.

• Build secure ingestion and indexing pipelines for internal knowledge sources (Confluence, SharePoint, document repositories, internal APIs) with appropriate access controls.

• Develop backend services and APIs that expose AI capabilities to internal users and, over time, to product teams building customer-facing features.

• Establish engineering standards for the AI function: testing, deployment, monitoring, and model evaluation frameworks.

• Own the full development lifecycle from requirements through production monitoring, with a bias toward shipping and iterating.

Requirements:
About You

• 5+ years of software engineering experience, with at least 2 years focused on AI/ML systems in production.

• Hands-on experience building RAG pipelines, working with vector databases (Pinecone, Weaviate, Elasticsearch, or similar), and integrating LLMs into backend services.

• Strong backend engineering skills: API design, microservices, production operations at scale. Proficiency in Python expected.

• Practical experience with LLM fine-tuning, prompt engineering, and evaluation methodologies.

• Comfortable with CI/CD, containerization (Docker, Kubernetes), and infrastructure-as-code.

• Familiarity with data security practices (PII handling, access controls, data classification). Experience in regulated environments (financial services, telecommunications, ISO 27001) is an advantage.

• Telecommunications domain knowledge is a plus but not required.

• Strong communicator who can explain technical trade-offs to non-technical stakeholders. Fluent in English.

• Self-directed and comfortable with ambiguity. You will be shaping the function, not joining a mature one.

Benefits:
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.