Spiral Ingénieur Blockchain

Posted 6 Hours Ago
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Hiring Remotely in Paris, Île-de-France, FRA
In-Office or Remote
Expert/Leader
Blockchain • eCommerce • Fintech • Payments • Software • Financial Services • Cryptocurrency
Block builds technology for economic empowerment.
The Role
Contribute to the Lightning Development Kit by writing and reviewing Rust/C/C++ code, improving tests and performance, maintaining language bindings (Java/Kotlin, C#, JavaScript/WASM, Swift), implementing features like Taproot, MuSig, PTLC, splicing and BOLT12, supporting LDK users and projects, and contributing to other Bitcoin-related initiatives.
Summary Generated by Built In
Spiral est la première organisation dédiée au bitcoin, gratuite, open source et à but non lucratif, au sein d'une grande entreprise technologique. Nous contribuons au développement du bitcoin en écrivant du code, en accordant des subventions à des projets open source et à des particuliers, en sensibilisant le public , en divertissant et en repoussant les limites de ce qu'une petite équipe peut accomplir pour influencer l'avenir de la monnaie. Bien que beaucoup ne voient dans le bitcoin que de l'or numérique, Spiral pense que, grâce au Lightning Network, le bitcoin est en passe de tenir ses promesses et de réaliser son potentiel en tant que norme mondiale pour les paiements entre particuliers.
L'équipe
Nous souhaitons renforcer notre équipe d'ingénieurs, composée de six personnes, qui se consacre exclusivement au développement du Lightning Development Kit (LDK) .
Le LDK est un projet open source complet qui permet aux développeurs de créer efficacement des applications Lightning. Il comprend une implémentation complète du protocole Lightning Network écrite en Rust, des API, des liaisons de langage, des applications de démonstration, et bien plus encore. Le LDK est utilisé dans des dizaines de projets à travers le monde, notamment Lightspark, Cash App, Alby et BitKit.
Les ingénieurs LDK qui travaillent pour Spiral consacrent une grande partie de leur temps à écrire du code, à le réviser, à répondre à des questions, à rédiger de la documentation et à accepter les correctifs et les demandes de fusion pertinents proposés par d'autres contributeurs. Le LDK a pour objectif de développer un projet open source durable, ouvert aux nouveaux arrivants, bénéfique pour les utilisateurs et qui, à terme, ne dépende pas d'une seule source de financement. La feuille de route du développement est transparente et les priorités de l'entreprise ne passent pas avant celles des utilisateurs.
Vos responsabilités
  • Contribuer au LDK en écrivant et en révisant du code, en améliorant l'infrastructure de test et en apportant votre aide aux projets et aux entreprises qui utilisent le LDK
  • Contribuer au développement et à la maintenance de fonctionnalités telles que :
    • Les liaisons de langage, notamment Java/Kotlin, C#, JavaScript/WASM/extensions de navigateur et Swift
    • La prise en charge du splicing et des canaux à financement partagé
    • La prise en charge de Taproot, notamment musig, les PTLC, les scripts multi-signatures et les scripts personnalisés
    • L'amélioration des performances, de l'évolutivité et de la robustesse du LDK
    • BOLT 12, VSS et sorties d'ancrage
    • Une version serveur du LDK
  • Lorsque vous ne vous consacrerez pas à tout cela, vous contribuerez à l'amélioration du bitcoin à travers des projets passionnants de votre choix. Presque tout est possible.

Vos compétences
  • Plus de 8 ans d'expérience professionnelle
  • Une expérience pratique du bitcoin et du Lightning Network
  • Une expérience en programmation avec Rust, C ou C++
  • La capacité à vous épanouir dans l'ambiguïté et à élaborer des solutions créatives pour répondre à des problèmes complexes
  • Un intérêt pour le bitcoin

Comment postuler
  • Ajoutez un lien vers votre profil GitHub (si vous en avez un), mentionnez tout projet parallèle que vous avez mené et que vous jugez intéressant de nous présenter, et expliquez en quelques mots pourquoi vous correspondez au profil recherché pour ce poste.

We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class.
We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page
Application Guidelines
Candidates may submit up to 9 active applications within a 60-day period. Reapplications to the same role are accepted 90 days after a previous application has been reviewed.
Use of AI in Our Hiring Process
We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws.
Contact us here with hiring practice or data usage questions.
Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.

Skills Required

  • More than 8 years of professional experience
  • Practical experience with Bitcoin and the Lightning Network
  • Programming experience in Rust, C or C++
  • Ability to thrive in ambiguity and design creative solutions to complex problems
  • Interest in Bitcoin

What the Team is Saying

Scott Maher
David Grodsky
Victoria Fan Azalde
Ahmed Ali Bob
Lynette Johnson McGee
Cesar Alaniz
Khiry Shank

Block Compensation & Benefits Highlights

  • Healthcare Strength Multiple medical, dental (Delta Dental), and vision (VSP) options are paired with Lyra Health offering up to 16 no‑cost therapy or coaching sessions per year for employees and each eligible dependent. Employer HSA contributions cover half of the deductible on the Aetna HSA plan.
  • Parental & Family Support Paid parental, medical, and caregiving leave are highlighted alongside fertility coverage via Progyny (for Aetna enrollees) and adoption/surrogacy support regardless of medical enrollment. Country guides also show strong local policies, such as up to 26 weeks at 100% base pay for primary caregivers in the UK.
  • Equity Value & Accessibility Employees participate in ownership through company equity and an ESPP that allows purchase of Block stock at a 15% discount. Materials indicate equity is available for most roles, with guidance to confirm grant cadence and location‑specific terms.

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The Company
HQ: Oakland, CA
12,000 Employees
Year Founded: 2009

What We Do

Block, Inc. is a global technology company with a focus on financial services. Made up of Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block, Inc. builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we’re helping build a financial system that is open to everyone.

Why Work With Us

Block builds simple, powerful tools that make progress towards an economy that’s truly open to all.

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At Block, your benefits evolve with you. Whether you’re planning for your financial future, prioritizing flexibility, or focused on well-being, we’ve got you covered. Competitive pay & health coverage form the foundation, but our benefits go further.

Typical time on-site: None
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