Overview
Dquadrant is a software company in the Netherlands that builds blockchain applications for other organizations and tests the ones they have already built1. Teams hire it to write and review smart contracts, the self-running code that enforces rules and moves funds on a blockchain, and to run the quality checks that catch faults before release2. It publishes developer tools of its own as well3.
Most of that work happens on Cardano. Dquadrant built an NFT marketplace on the network at a time when Cardano had no smart contract support at all, and that work led to a development partnership with Input Output4. Under it, Dquadrant was one of six companies each asked to build a reference application in Plutus, one of Cardano's smart contract languages, and release the source for other developers to learn from5. It later became an Enterprise founding member of Intersect, the member organization that looks after Cardano's shared software and governance tooling6.
Key Features
- Transactions assembled from a single request. Kuber, Dquadrant's public Haskell library and web service for building Cardano transactions, takes a description of the transaction a developer wants and hands back a balanced one ready for a wallet to sign3.
- Plutus code compiled without a local setup. Kuber Playground runs in a browser. Connect a wallet, then compose transactions, convert address and encoding formats, or compile a Plutus script and read the compiled output straight back, with nothing to install7.
- Crowds of simulated users before the real ones arrive. Autonomous Agent Testing drives many automated agents at an application at once and walks them through multi-step interactions, so scaling and performance faults show up before the software reaches Cardano's live network8.
- Completed testing of network upgrades. Intersect's upgrade record marks Dquadrant's testing of the Chang upgrade complete, with no major issues outstanding9. Intersect also made Dquadrant its continuity partner for GovTool, the site where ADA holders vote, putting it in charge of testing features other teams build10.
- A vote on treasury spending. Intersect placed Dquadrant among five independent organizations that approve withdrawals from Cardano's treasury, where a majority of them must sign before funds move11.
What to Expect
The site reads as a company brochure rather than an application. It sets out the services on offer, names Ronald as chief executive and Sandip as chief technology officer, and lists the four products the company puts its name to1, among them a mempool explorer that reports on Cardano transactions still waiting to be confirmed12.
Developers will find more in the repositories than on the site. The Kuber repository holds the library itself, the server that exposes it over the web, and a package for Hydra, Cardano's layer-2 system for settling many transactions away from the main chain3. A separate repository carries the Plutus contracts, command-line tool and front end for the NFT marketplace Dquadrant built13.
Anyone weighing the track record can check it without asking. Dquadrant's quality assurance work is recorded on Intersect's own pages, not only its own9, and its partnership posts set out what each engagement covered, including end-to-end and performance testing of the Vasil upgrade against the changes three Cardano Improvement Proposals introduced14. The Project Catalyst proposals it has filed are public too, among them funded work to add Hydra support to Kuber15.
