Marinka M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

My name is Marcell Marinka, and I help business owners and shareholders build systems that turn their company's data into actionable decisions. I have 3 years of hands-on experience in data analysis and Decision Support Systems, and a BSc in Business Informatics from Budapest Business School where I specialized in Decision Support Systems and statistics. My core work is designing and building Decision Support Systems and doing end-to-end data analysis projects that gives owners and shareholders a clear, honest picture of their revenue, costs, and business performance. I have worked extensively with financial and operational data and understand how business data actually behaves in the real world, not just in theory. On the technical side I work with Python (Pandas, NumPy, scikit-learn), SQL, and Power BI to build automated data pipelines, machine learning models, interactive dashboards, and forecasting tools. Where a project calls for it I also build predictive models, trend detection, and pattern analysis that go beyond standard reporting. Beyond the data layer, I can also handle the front-end side of a solution — whether that means building a client-facing interface with Power Pages, working with other low-code and no-code tools, or developing custom front-end components so that the end product is something users can actually interact with directly, not just a file or a report. What clients typically come to me for is making sense of messy, underused business data — cleaning and structuring it, building dashboards that non-technical stakeholders can actually use, automating repetitive reporting work, and creating models that support smarter planning and forecasting. I work independently, communicate clearly throughout a project, and deliver solutions that are built to last. If your business is sitting on data that isn't working hard enough for you yet, I'd be glad to talk about how we can change that.