At Koonei.com , we’re building the future of data-driven decision making for e-commerce and financial performance. As a fast-growing startup, we thrive on bold ideas, fast execution, and people who want to make an impact. We are a fast-growing company operating in the subscription sector, with high transaction volumes and advanced payment management. We manage complex and dynamic cash flows, where monitoring and optimizing every cost item chargebacks, refunds, bank fees, operational and business costs, is essential for the sustainability and growth of the business. We’re now looking for a Data Scientist / Data Science & Analytics Lead to join our team in Milan and take ownership of how we turn data into insight, action, and competitive advantage. What You’ll Do Analyzing large volumes of transactional and financial data. Developing predictive models to forecast future volumes, reduce chargebacks, and optimize refunds. Defining and tracking critical KPIs (margins, churn, cash flow, cost per transaction, etc.). Leading our internal development team by setting priorities and translating business needs into concrete technical requirements . Overseeing the creation of an internal analytics CRM capable — also with the help of AI — of suggesting operational actions and data-driven strategies. Translating data into clear , immediately actionable insights to support fast and focused decision-making. What We’re Looking For Degree in a quantitative field (Mathematics, Statistics, Computer Science, Engineering, or similar). Solid experience in data science, predictive modeling, and machine learning. Strong command of Python (pandas, scikit-learn, numpy, etc.) and SQL. Experience with data visualization tools (e.g., Power BI, Tableau, Metabase). Ability to manage projects and collaborate with development teams . Strategic and results-oriented mindset, with a strong focus on costs, margins, and business performance . Familiarity with AI-powered analytics and the ability to evaluate when and how to apply AI in business decision-making. Nice to Have Experience in subscription-based , fintech, or digital payments environments . Knowledge of fraud detection systems and chargeback/refund management. Familiarity with cloud environments (AWS, GCP, Azure). Background in business process optimization . Why Join Koonei A competitive contract aligned with your experience and level of responsibility. Direct impact on the future of a fast-growing startup . Opportunities for professional growth and development in big data and AI applied to business. A culture of collaboration, ownership, and innovation where your ideas matter. On-site position in Milan, located near Piazza Gae Aulenti. Ready to Build With Us? If you’re excited by the idea of leading analytics in a high-impact role, we’d love to hear from you.
About Koonei: At Koonei (koonei.com), we are in an exciting phase of building our SaaS ecosystem. We are looking for a Full Stack Developer to join our growing team. This role is backend focused, with frontend responsibilities. You’ll work closely with the product team to help build cutting-edge solutions and enhance our ecosystem, while also gaining exposure to new technologies. We want to grow together as we scale our products, and we need passionate individuals like you to help us succeed. Position Overview: As a Full Stack Developer, you will be responsible for developing the backend architecture and building the infrastructure necessary to support our SaaS products. You will work on both backend and frontend aspects of our systems, collaborating with product and engineering teams to deliver high-performance, scalable solutions. You will also have the opportunity to work with LLMs (OpenAI, Claude) and cloud-based platforms, further enhancing your skill set. What You’ll Do: Backend Development : Design, implement, and optimize the server-side infrastructure using Node.js , Express , MongoDB , and PostgreSQL Frontend Development : Work with React and Next.js to develop intuitive and responsive user interfaces Build and maintain RESTful APIs that enable smooth communication between the frontend and backend System Design & Architecture : Collaborate on designing scalable, efficient backend systems and databases, ensuring high performance and low latency AI Integration : Leverage your understanding of LLMs like OpenAI or Claude to integrate intelligent solutions into our ecosystem Optimize database queries and ensure fast data retrieval and storage Continuously improve code quality, ensuring the application is maintainable and scalable Collaborate with product, design, and other teams to understand requirements and deliver high-quality features Troubleshoot and resolve issues across the stack to improve the overall user experience Learn and adapt to new technologies as required by evolving product needs What We’re Looking For: 3+ years of experience as a Full Stack Developer with a strong focus on backend development Proficiency in JavaScript , Node.js , Express , React , and Next.js Strong experience with MongoDB and PostgreSQL Solid understanding and hands-on experience building REST APIs Good knowledge of Data Structures & Algorithms (DSA) , system design , and logic-building Experience working with SaaS ecosystems and a proven track record of developing products already available in the market Familiarity with LLMs (e.g., OpenAI , Claude ) and how they integrate with modern applications Knowledge of cloud platforms such as AWS (preferred) or other similar services Strong understanding of software development principles and best practices Willingness to learn and adapt to new technologies and tools as needed Strong problem-solving skills, with the ability to design scalable, efficient solutions Excellent communication and collaboration skills, with the ability to work well in a team and independently What You’ll Get: Competitive salary Opportunity to work in a fast-growing SaaS company with ample career development opportunities A flexible, collaborative work environment where you can make a meaningful impact Flexibility in working hours and the possibility of remote work Professional development and mentorship opportunities Access to cutting-edge technologies, including AI and cloud-based solutions Additional Information: Please note : We do not currently have an Indian entity. As such, you will be responsible for managing your own PF, Health Insurance, taxes, etc. In the future, we hope to establish an Indian entity. Salary will be provided in USD . Looking forward to seeing what you can bring to our team. Let’s build something amazing together!