Valentin Zuld's Work | ContraWork by Valentin ZuldFull stack software engineer, 15+ years experience
Sign Language Interpreter Four iPad and iPhone apps for a Fortune 500 manufacturing client, delivered 2024–2025. Inventory for barcode-based stock tracking, Machine Dashboard for production and scrap reporting, work queues, work orders and tool sheets at the machine, Maintenance for equipment upkeep, and Supervisor for production reports. Client name withheld. Ascertify, our own code-audit SaaS. It audits apps built with Lovable, Cursor or an agency, and SaaS businesses bought on Flippa, Acquire.com (https://Acquire.com) or TrustMRR. It reads the repository without running it and reports what is exposed, what is missing and what only the seller knows how to run, with every finding pinned to a file and line and explained in plain English. Covers JavaScript and TypeScript stacks such as Next.js, React, Node, Supabase, Firebase and Prisma. ascertify.io ColorPage.ai, our own AI SaaS. Upload a photo or type an idea and get a print-ready coloring page or a full coloring book with a cover. Designed, built and operated in-house, from the AI generation pipeline to payments and print-ready PDF export. 80,000+ pages created so far, with growth driven by programmatic SEO. colorpage.ai