Etchv vs. Staffcoder, hands-on practice for modern frameworks in a browser IDE

Add an invisible watermark to images, PDFs and video, then detect it to see which copy was shared. Forensic watermarking API with a free trial. Hello HN!The inspiration for Etchv came directly from friends who raised concerns about the growing ease of unauthorized media copying without attribution. To address this, Etchv embeds an invisible watermark inside images, PDFs, or short videos that survives modifications like screenshots, format changes, and file compression.You can try it on our homepage without signing up. There's also a live demo where a watermarked PDF page gets screenshotted and the watermark ID is still successfully recovered: https://etchv.com/demo/traceInstead of training a model from scratch...

Staffcoder helps developers build real-world engineering skills through hands-on framework practice and production-style challenges in a professional IDE. Hi HN,I'm Shashank. I have curated 1000s of practical real world software engineering assessments in the past as part of my job. I felt there's a gap where if a person wants to learn to build software they have many options to learn from (learning platforms and free resources) but very few or no options to practice their skills hands on. I built Staffcoder so that developers can learn the skills while solving real world scenarios across various domains in software engineering.On Staffcoder you can select a skill, start from beginner level and move up solving real world challenges. Al...