Spiral Blockchain Engineer

Block
Paris
Workplace: RemoteFull timeEUR 392,700 - 645,100 annuallyFunction: Data Science & Machine LearningSkills: ["Code review","Documentation","Collaboration","Problem-solving"]

Develop and evolve the open-source Lightning Development Kit (LDK), including writing and reviewing Rust code, improving test infrastructure, and maintaining documentation. Help expand LDK’s capabilities such as language bindings (Java/Kotlin, C#, JavaScript/WASM, Swift), support for Lightning features (splicing, dual-funded channels, Taproot variants), performance/scalability, and delivering a server version. Collaborate with the wider open-source community through patches and pull requests.

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FursaFursa
Block
Block
4 days ago

Spiral Blockchain Engineer

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Source: Company careers pageValidated by: Fursa AI
Last checked: 3 hours agoStatus: Live

Job Summary

Develop and evolve the open-source Lightning Development Kit (LDK), including writing and reviewing Rust code, improving test infrastructure, and maintaining documentation. Help expand LDK’s capabilities such as language bindings (Java/Kotlin, C#, JavaScript/WASM, Swift), support for Lightning features (splicing, dual-funded channels, Taproot variants), performance/scalability, and delivering a server version. Collaborate with the wider open-source community through patches and pull requests.
Location: Paris
Workplace: Remote
Employment Type: Full time
Job Function: Data Science & Machine Learning
Seniority: Mid level

Key Responsibilities

  • •Contribute to LDK by writing and reviewing code, improving testing infrastructure, and helping integrate patches and pull requests from the community.
  • •Enhance LDK language bindings across Java/Kotlin, C#, JavaScript/WASM (browser extensions), and Swift.
  • •Add and maintain Lightning features such as splicing and dual-funded channels.
  • •Improve Taproot support, including MuSig, PTLCs, multi-sig scripts, and custom scripts.
  • •Increase LDK performance, scalability, and robustness and help ship additional capabilities like BOLT 12, VSS, and a server version.

Pay and Benefits

Salary: EUR 392,700 - 645,100 annually
Perks:Remote WorkHealth InsuranceFlexible TimeRetirement SavingsFamily Planning

Key Requirements

  • •8+ years of professional experience.
  • •Hands-on experience with bitcoin and the Lightning Network.
  • •Experience programming with Rust, C, or C++.
  • •Ability to thrive in ambiguity and build creative solutions to complex problems.
  • •A strong appreciation for bitcoin.
Experience:BitcoinLightning NetworkOpen-source
Skills:Code reviewDocumentationCollaborationProblem-solving
Languages:English
Tech Stack:RustCC++JavaKotlinC#JavaScriptWASMSwiftAPILightning NetworkLightning Development Kit (LDK)BOLT 12VSSAnchor outputsTaprootMuSigPTLCsMulti-sig scripts

Company Brief

Block
Builds financial services and commerce tools to empower businesses and individuals, operating products such as Square, Cash App, Spiral (Bitcoin initiatives), TIDAL, and developer-focused payment and banking solutions.
Industry: Fintech Infrastructure
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Francisco, United States
Founded: 2009
WebsiteLinkedIn