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CDD

12 octobre 2026

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Bitcoin Custody Engineer

DI-AFRICA

Madagascar

DI-AFRICA recherche un Bitcoin Custody Engineer expert pour concevoir et construire une solution de garde de Bitcoin auto-hébergée, essentielle à la sécurité et à la gestion des paiements de son groupe international.

Missions

Design and build the self-hosted corporate Bitcoin custody and payment layer: per-entity wallet coordinators, hot and cold paths, and spend policies driven by the group's approval matrix. Build per-entity wallet coordinators on a self-hosted Bitcoin Core node. Implement online and offline transaction initiation using PSBT, descriptors and Taproot. Design hot/cold custody architecture with limits, air-gapped and HSM-backed cold paths. Translate the approval matrix (RACI) into enforceable spend policies. Implement incoming-funds controls and test on signet/regtest environments.

Profil recherché

Location: Based in Madagascar, working remotely from home. Experience: Expert - 10+ years of relevant professional experience.

Compétences
Technical environment:
Bitcoin Core RPC
descriptor/PSBT toolchains.
Go or Rust (wallet coordinator)
Bash/Python.
YubiKey
Coldcard
air-gapped signing
HSM.
Required skills:
Self-hosted Bitcoin custody.
Corporate hot/cold wallet architecture.
Separation of FIDO2 authentication keys from coin keys.
Policy-based spending.
Signet/regtest.
Nice to have:
PKCS#11/HSM integration.
Shamir secret-sharing backups.
Informations

CDD

Madagascar

10 ans d'expérience

EN, FR

Date limite : 11 novembre 2026