A worker-owned cooperative

Assembling the best team to build Cardano Node.

HaskellNode is an independent engineering cooperative dedicated to one of the most consequential Haskell codebases on the planet: the node that runs Cardano. We exist for a simple reason — no single organization should own the Haskell Node.

Apply to join Why a cooperative

Why a cooperative, and why now

Cardano has crossed a threshold. Under Voltaire, treasury spend is decided on-chain by DReps and the Constitutional Committee. Maintenance of cardano-node has moved to Intersect MBO's Paid Open Source Model. On the Rust side, PRAGMA and Amaru are building a second node so the network can finally have client diversity.

The Haskell side needs the same. A community of independent shops contributing to the Node — not a single firm setting the roadmap, the budget, and the priorities at once.

HaskellNode is one of those shops. Member-owned. Built to take POSM contracts. Built to outlive any one funder, any one founder, any one cycle.

What the cooperative does

Build the Node

Contribute to cardano-node, ouroboros-consensus, cardano-ledger, and the surrounding Haskell stack. Networking, consensus, ledger, tracing, CLI, hard-fork plumbing — the work that keeps the chain moving.

Ship Leios

The throughput upgrade Cardano has been waiting for — Ranking Blocks, Endorser Blocks, and committee-based vote diffusion on top of Ouroboros Praos. Devnet is up; public testnet in June 2026; phased mainnet rollout targeting end of year. We want to be on the patches.

Train the next maintainers

Production Plutus and Haskell engineers number in the low thousands. The Node is harder than most of them realize. Senior members are expected to spend real time pairing with newcomers — so the knowledge keeps spreading instead of bottlenecking on a handful of people.

How we work

  • Constitution-aligned. We operate within the tenets of the ratified Cardano Constitution: non-censorship, decentralized control, sound monetary policy, open source. Every treasury proposal we touch must pass constitutional review — we behave as if it already has.
  • Open by default. Every patch, every design note, every meeting summary lands in public. GitHub history is the resume.
  • Public DRep delegation. Members commit their cooperative-held stake to named community DReps with published rationales. No silent voting. No hidden conflicts.
  • Client diversity, not language tribalism. Amaru and PRAGMA are not competitors — they're the other half of a healthier Cardano. We build the Haskell node in a way that helps the Rust node keep pace.
  • Mentorship is the job. Veterans bring new contributors up to speed on consensus, ledger, and the eUTXO model — on the clock, not on the side.
  • Share the work, share the upside. Members own the cooperative. Contract revenue, grants, and bounties pool and distribute by rules the members write together.

What we are not

  • Not a venture studio. We don't pivot to AI. We don't spin up subsidiaries. We work on the Node.
  • Not a founder cult. The cooperative has members, not a visionary. Decisions are votes, not decrees.
  • Not for sale. Member-owned cooperatives cannot be acquired.

Join the cooperative

You don't need a PhD. You don't need ten years of Haskell. You don't need a CV that fits a recruiter's filter. We will teach you the codebase if you bring the discipline to learn it.

You need to love Cardano.

Whether you write Haskell every day, run a stake pool, vote as a DRep, ship Plinth or Aiken contracts, or are still working out what a UTXO is — if you're here for the decade and you care about getting the Node right, there's a seat at the table.

join@haskellnode.com