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Serokell Logo Serokell · IT - Software Development

Haskell Internship

· Job Posted April 22, 2026
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Job Description

Serokell is a fast-growing, fully remote software development company that works on innovative solutions for complex problems. We are eager to connect with students who are passionate about developing cutting-edge software using modern technologies such as functional programming. The project focuses on building a unified, multi-network messaging client with an instant messenger–like interface, providing a seamless communication experience across multiple platforms.

Job Responsibility

  • Fix known bugs or errors by checking that the instructions that triggered the condition do not do it anymore. Apart from tests we look for an invariant that will forbid the reappearance of the bug
  • Implement functionalities by following constraints on the overall architecture that restricts and delegates capabilities to trusted modules. Bonus points if you can propose architecture changes coherent with the client goals
  • Review the merge request from other developers in the project. Propose alternative designs or simpler alternatives while keeping in mind the design document for the project
  • Establish communications earlier and often with your peers to unblock work, delegation and common understanding

Requirements

  • Knowledge of Haskell 98 features, including writing your own typeclasses
  • Experience with applicative functors and monad transformers, along with a good understanding of commonly used transformers (e.g., ReaderT and StateT)
  • Familiarity with some of the following: text, mtl, basic lenses, Stack/Cabal, type families, QuickCheck/Hedgehog, Template Haskell
  • Knowledge of fundamental algorithms and data structures (e.g., binary search trees, DFS, hash tables, quicksort)
  • Experience working with Git
  • Good spoken English for participating in team meetings, as well as strong written communication skills
  • A genuine interest in functional programming, and Haskell in particular, with an open mind toward learning new things

What we offer

  • Competitive salary
  • Attractive international projects
  • Participation in the leading world conferences
  • International teams and a multicultural environment
  • Fully remote work and flexible working hours
  • Possibility to take days off any time you need
  • Investment in your professional and career growth, which will correspond to wage growth
  • Mentoring and training
  • Opportunity to contribute to one of the functional programming industry’s leading blogs
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