Junior AI Engineer

What will you do? As a Junior AI Engineer at Rebtel you are someone who has already shipped AI-powered products and wants to accelerate their growth in a fast-moving environment. This is not a research role. We want someone who can turn AI capabilities into business impact. You'll work closely with teams to build, deploy, and improve AI systems that create measurable value across the organization. The ideal candidate has hands-on experience with Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), prompt engineering, and production software development. Areas of ownership: Build AI-powered applications using modern LLMs and agent frameworks. Design, implement, and optimize RAG systems using vector databases and enterprise data sources Develop internal AI tools that improve productivity, quality, automation, customer experience, and decision-making Create evaluation frameworks to measure AI quality, reliability, latency, and business impact Work with product and business stakeholders to identify high-impact AI opportunities. Integrate AI capabilities into existing products and workflows Monitor, debug, and continuously improve production AI systems. Stay current with emerging AI technologies and recommend practical applications. Requirements: You are an excellent communicator and collaborator. We work in English, but you will hear many languages in our Stockholm office Professional experience developing and deploying AI-powered applications, including hands-on work with Large Language Models (LLMs), RAG systems, and platforms such as OpenAI, Anthropic, Gemini, or open-source models. Experience building and deploying RAG based solutions. Experience with APIs, databases, and cloud environments. Understanding of prompt engineering, embeddings, vector search, and model evaluation. Ability to independently build prototypes and ship features. Experience with LangChain or similar frameworks is a plus It's a plus with experience with vector databases such as Pinecone or pgvector. Familiarity with agentic workflows and tool calling is a plus It's a bonus if you have experience deploying AI applications to production. Understanding of AI observability and evaluation platforms is a plus Experience with Docker, Kubernetes, and CI/CD pipelines is a plus Why Rebtel? Rebtel has been connecting people across borders for nearly 20 years. Today, we’re profitable, growing, and at a pivotal moment in our journey. As we enter our next phase, we’re building an organisation designed for speed, ownership, and real impact, where every role contributes directly to shaping what comes next. This is a place with global ambition and a strong foundation, where ideas move quickly and decisions matter. You won’t get lost in layers of process or slow-moving structures. Instead, you’ll find the space to take ownership, collaborate across teams, and make meaningful contributions from day one. Based in Stockholm, we bring together a diverse, international team united by a shared purpose: to simplify the way people connect worldwide. At Rebtel, you are the most important asset and we strive to provide a comprehensive package of benefits and perks that enhance your well-being and work experience. Here are some of the things you can expect from us: Pension Plan Health Checkups, Influenza shots and Private Medical Insurance Dental Insurance Occupational insurance Wellness allowance (5,000 SEK) Discount on gym memberships Bonus program Extra parental pay 30 days annual vacation Monday breakfasts Relocation Support, if you're joining us from afar, we'll assist you in making a smooth transition. We are Rebtel. We come from all around the world to create products for anyone who has crossed a border. We believe in equal opportunity and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.