What will you do? As a AI/ML Engineer at Rebtel you will define how AI is done at Rebtel. What tooling we standardise on, how we evaluate models we put in front of real users, what "good" looks like for our prompts and our pipelines. AI is going from a side project to the core of how Rebtel operates and what we ship to our users. We're hiring the second engineer on our ML/AI subteam to help build it classical ML for the business, LLM-powered systems for the product, and a clear production mindset on both. You'll sit inside the Data team, report to our Head of Data, and partner with one other ML/AI engineer to shape this capability from the ground up. Areas of ownership: You'll own work across two complementary tracks, and you'll ship in both. Classical ML, in production, for operational leverage Risk and fraud models across payments, top-ups, and account behaviour Churn prediction and retention modelling on a user base of a million-plus Forecasting, pricing, segmentation, and the next batch of operational problems we haven't tackled yet Owning models end-to-end scoping with stakeholders, building, deploying, monitoring, retraining LLMs and AI agents, from internal automation to in-product features Start with our customer support agents and automations: RAG pipelines, prompt orchestration, tool-use, evaluation harnesses Move LLM capability into the product as user-facing features Help guide the company on where AI actually creates leverage, what to build, what to buy, what to ignore and turn the good ideas into shipped systems Requirements: You are an excellent communicator and collaborator. We work in English, but you will hear many languages in our Stockholm office 4+ years of hands-on ML engineering in Python, with real production ownership not just notebooks Strong fundamentals in classical ML: feature engineering, model selection, validation, and the unglamorous parts of keeping a model healthy in prod A genuine production mindset: monitoring, retraining, eval harnesses, CI/CD for models, and the instinct to debug when something drifts at 2am Comfort working the whole loop: stakeholder scoping → data → model → deployment → measurement → iteration Strong written and spoken English, and the ability to translate between business problems and ML ones Hands-on experience with LLM frameworks — LangChain, LangGraph, LlamaIndex, or equivalents Built RAG systems, agentic workflows, or LLM-backed products that real users (or real internal teams) actually used Comfortable with vector databases, embeddings, prompt evaluation, and measuring LLM systems with something more rigorous than vibes Obsession with staying up-to-date on developments in the AI space Experience with a major cloud (AWS / GCP / Azure), containers, and a modern data stack Experience in MLOps tooling: MLflow, Airflow, Kubernetes and feature stores is a plus Background in fintech, payments, telecom, or other regulated / operational domains 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.

What will you do? As a Product Designer you will be part of a small team, achieving big things. You will be leading the design of our applications and web, impacting the experience of millions of users each month. The role includes taking ownership of design ideas through the research, wireframing and high-fidelity visuals to the final product and beyond. You should be able to champion user research and usability testing across the company as well as help to ensure a high level of quality and consistency across Rebtel’s products. We think that nothing is ever complete and that everything can always improve. Rebtel is a dynamic place where the best solution wins - no matter where it comes from. Areas of ownership: Own the end-to-end design process, from research and wireframing to high-fidelity visuals, final product delivery, and ongoing iteration Champion user research and usability testing across the organization Ensure high quality and consistency across all of Rebtel’s products Drive continuous improvement, embracing a mindset that nothing is ever truly finished Contribute to a culture where the best ideas win, regardless of origin Act as a collaborative team player in a small, high-impact team environment Share ideas and perspectives beyond your core area of expertise Work cross-functionally with product managers, engineers, and other stakeholders Requirements: You are an excellent communicator and collaborator. We work in English, but you will hear many languages in our Stockholm office The tools you use are secondary but you should have your own views on what processes could be adopted when taking an idea from research to wireframe to prototype to final design The ability to develop solutions to design problems that are as beautiful as they are functional Strong visual design competence An interest in new apps and app design trends 5 years of proven experience in app and web design Experience with user research, usability testing and A/B testing Minimum of 5 years of experience in a similar role Why Rebtel? When you join Rebtel, you become part of a global team, bringing together diverse minds from every corner of the world. Our headquarter is nestled in Stockholm and here we strike a balance between dedicated work and more relaxed activities. Every Friday the unmistakable aroma of freshly popped popcorn fills the air, but our celebrations encompass everything from minor and major common accomplishments to cinnamon bun day. 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. Rebtel is an international workplace, and at the office, we speak English; therefore, high English proficiency is required. We are committed to being an LGBTQIA+ safe workplace, a place where individuals can be open about who they are without fear of discrimination or harassment. 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.