**Evoke Solutions **is the UK’s first Bitcoin treasury consultancy for HNWIs and SMEs. We deliver secure, non-custodial, multi-sig wallet setups with inheritance, governance, and risk controls baked in.

We’re now building a simple interface to abstract away technical complexity for clients. Think: 2-of-3 wallet builder + Trezor integration + recovery test flow + PDF governance export.

We need a Bitcoin-native engineer with real PSBT experience, who can help us build the first version of this product fast, clean, and secure.

What You’ll Work On: 2-of-3 wallet creation flow (with descriptors + address validation) Hardware wallet integration (Trezor via WebUSB or HWI) PSBT signing coordination (offline + online flows) Recovery simulation and signing UX Exportable PDF of wallet structure & governance model (Optional) lightweight admin dashboard to track setups

You Should Know: BitcoinJS, Specter, Sparrow or Electrum experience PSBTs, Miniscript, or descriptor-based wallet design Familiarity with multi-sig coordination and hardware signing Clean UX thinking — we're not trying to build a bloated dashboard Bonus: experience with similar wallet projects

Budget & Rate: Fee Range: £8,000 – £14,000 ($10,000 – $18,000 USD) Engagement: 8–12 weeks freelance (extension possible) Paid in fiat