Functional Back End Engineer (Haskell, Nix) (F/M/NB)

  • This job was published on December 5, 2025
Postuler maintenant
  • Start date - ASAP
  • Location - Télétravail
  • CDI

Responsibilities

You will contribute to core blockchain backend components and help maintain a high-quality, scalable engineering system.

  • Develop and maintain core blockchain modules (consensus, ledger, APIs, testing).

  • Work confidently in large, advanced Haskell codebases.

  • Design clean, maintainable backend architectures and libraries.

  • Improve build and deployment reproducibility using Nix (or similar).

  • Maintain strong DevOps practices: CI/CD, test automation, cloud deployments.

  • Collaborate effectively in remote, distributed teams.

  • Contribute to open-source or community-driven technical initiatives when relevant.

Required Skills

  • Senior-level proficiency in Haskell, including advanced language features.

  • Ability to navigate and improve large production codebases.

  • Solid backend engineering fundamentals (architecture, patterns, methodologies).

  • Strong command-line fluency and comfort with tooling.

  • Experience with CI/CD, automated testing pipelines, and cloud deployments.

  • Ability to identify accidental vs. essential complexity.

  • Strong remote collaboration skills and clear technical communication.

Preferred Skills

  • Experience with blockchain core development (consensus, ledger, protocol APIs).

  • Strong interest in Nix (or Guix) and declarative, reproducible builds.

  • Familiarity with build systems like Bazel, Buck2, or Meson.

  • Prior open-source contributions (code, libraries, tooling, blog posts, talks).

Soft Skills

  • Self-starter mindset with high autonomy and proactivity.

  • Enjoys working in global, remote teams.

  • Strong sense of ownership and impact.

  • Curious, continuously learning, and community-oriented.

  • Comfortable representing engineering excellence with clients and peers.

Qualifications

  • Years of experience:

    • 5+ years in backend/software engineering.

    • 3+ years of professional Haskell experience (or equivalent depth through major personal/open-source work).

  • Proven delivery on large codebases or independently driven high-quality projects.

  • Senior engineering track record in functional programming environments.

Benefits

€80k – €100k
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Apply for: Functional Back End Engineer (Haskell, Nix) (F/M/NB)

  • Start date - ASAP
  • Location - Télétravail
  • CDI
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