We make your numbers trustworthy, then automate the work around them. We're a fit when you spend to grow, run the back office by hand, and have no engineer in-house to build the systems you need. Everything we build goes into the stack you already run, and you own it. Unit Economics & Profit. We model true CAC, contribution margin and profit by channel and customer, reconciled to your books. Marketing attribution. We build first-party attribution that shows which channels drive sales, and feed real revenue back to your ad platforms. ERP Automation. We take the manual work out of the systems your business runs on, so orders, invoicing, reconciliation and reporting run on their own. AI Workflows. We build agents that read your documents, extract the data and drive the next action, while your team handles the exceptions. Custom. We take products from 0-to-1 and 1-to-many, for the builds with no playbook. Two founders run otum. Stavros Symeonidis, a software engineer, scopes each build, and Nicole Callaghan, a project manager, runs delivery. We manage a distributed team of senior software engineers, each chosen through our selection process, and bring the right one to each job. A senior engineer reviews every build before it reaches you. Work starts with Proof Week, one week at a fixed fee. You pick a number your tools already report but you can't trust, and we make it hold up in your own stack. Your data never leaves your infrastructure. At handover you get the code and the IP, documented. We've been building software since 2020 for businesses of all sizes. otum.io/work has fourteen of our builds, each with the industry it was for, the stack we used and the number it moved. Write to hello@otum.io or use the form at otum.io/contact. An engineer replies personally the same working day.