Lambda Days
is this one-of-a-kind experience in the functional world.
27-28 May 2024
Kraków | Poland

For over a decade, Lambda Days has brought the functional programming worlds of academia and industry together. The collision of practical application and research has offered an exciting fresh approach, regardless of your level of expertise.

Whether you’re new to Lambda Days or you are one of the many friendly faces we see regularly at our events, we are happy to get excited about Lambda together with you.

Come to beautiful, sunny Krakow for Lambda Days to find out what is possible with functional programming - explore the latest in battle-tested Scala, Erlang and Haskell, experience the energy that F# and Elixir bring to the table, connect with the innovators working with Elm, Luna and Ocaml and see what will come next!

waiting list



The Very Early Bird sale starts mid-January 2024 and will be exclusive to those who sign up to the Waiting List.

The Early Bird sale starts on 1 February 2024 and saves you 300 PLN net (approx €70) compared to regular tickets. The number of tickets is limited.

Looking for discounts?

  • Students! Get a special in-person ticket for 400PLN (+ VAT and fees). Contact us regarding student tickets and/or volunteering options.
  • Dear Lambda Ladies - we can't get enough of you! Ask your companies if they want to pay your fee. For each Lambda Lady in a party, everyone gets 10%* off the regular price, adding up to 50% off the entire order.
  • Bring a party! Ask us about the group discounts (3 or more people). Also, check above if the Lambda Ladies discount doesn't apply (above).

* Total discount cannot go over 50%, the offer applies to invoices issued for group reservations per order (the company receives a discount only for a single order, not for the potential following purchases).

Discounts only apply to full-priced tickets and can't be combined. Contact us directly for details.




Become a sponsor!

We need support from the community to make Lambda Days the best event it can possibly be. In return, we offer sponsors the opportunity to showcase technology and hire new talent. Sponsorship will also align your company with cutting-edge technology, engage and raise brand awareness with over 400 functional programming professionals. Explore our sponsorship possibilities and receive our brochure by sending us an email.


As always we’re doing our best to make sure our conference is as diverse and awesome as the community we serve.

Thanks to the support from Standard Chartered we can distribute 5 tickets among participants from groups underrepresented in IT.

Apply to get yours!

First deadline: 22/04/2024 (recipients chosen)

Second deadline: 30/04/2024 (if recipients do not confirm, tickets are redistributed)


Want to join one of the most exciting IT conferences in Europe free of charge? Join our team as a volunteer!



Krupnicza 33

31-123 Kraków



We managed to secure rooms at a special B&B rate per night for Lambda Days guests. Use the following links to get better prices at:

Aleja 3 Maja 47a, 30-062 Kraków

-20% off the full price published on the hotel website

To book and get an attendee discount remember to contact using the password "LAMBDA DAYS"

ul. Św. Marka 20, 31-020 Kraków

-20% off the full price published on the hotel website

To check the attendee price and book contact using the password "LAMBDA DAYS"


Why should you attend Lambda Days 2024? (a.k.a. "why can’t I just watch the talk videos online for free instead…?")

Firstly, not all the videos will be published right after the conference and will be kept exclusive to the attendees for a couple months.

The greatest asset of any conference is the community behind it. The Lambda Days crowd is inquisitive, open-minded, friendly and known to motivate each other to learn and innovate.

They ask the right questions, recommend the best talks, point to concepts to explore, inspire and challenge preconceptions at every turn.

Want to make the most of the content our speakers prepare? Experience it live with a crowd of people as excited about it as you are!







Are you interested in presenting your thoughts on the subject of functional programming? Submit your presentation!

As of now we have identified the followig areas our audience would love to hear about:

  • Functional languages
  • Type Theory
  • Testing & Verification
  • Software and system design
  • Reactive Programming
  • Web programming
  • Computation in functional technologies
  • Applications and case studies

Is your presentation slightly outside that scope? Amaze and inspire us with your submission!

We’re happy to support candidates from under-represented groups in the software development community.

If you have not spoken at conferences before or need help in preparing, our programme committee members are happy to mentor and assist you with their feedback in the planning and delivery stages of your talk.

The first round of reviews will take place in January, The second round can be cancelled if we receive enough submissions in the first round.

DEADLINES: first selection: 10/12/2023, second selection: 14/01/2024

Programme committee

John Hughes

Co-Designer Of Haskell And Quickcheck

Mary Sheeran

Professor at Chalmers

Simon Thompson

Computer science researcher @ University of Kent and ELTE

Katja Mordaunt

Tech-for-better dev & elm advocate

Łukasz Sowa

Managing Partner @ Iterators, Scala aficionado

Samantha Wójtowicz

Embedded software developer flirting with Clojure

Radek Szymczyszyn

Tech Lead @ Erlang Solutions

Code of Conduct

Full version available here. All attendees, speakers, sponsors and volunteers at our conference are required to agree with the following code of conduct. Organisers will enforce this code throughout the event. We are expecting cooperation from all participants to help ensure a safe environment for everybody.

Our conference is dedicated to providing a harassment-free conference experience for everyone, regardless of gender, sexual orientation, disability, physical appearance, body size, race, or religion. We do not tolerate harassment of conference participants in any form. Sexual language and imagery is not appropriate for any conference space, including talks, workshops, parties, Twitter and other online media.

Conference participants violating these rules may be sanctioned or expelled from the conference without a refund at the conference organisers' discretion.

Please bring any concerns to the immediate attention of the event staff, or contact our Event Coordinator, Barbara Trojecka using our contact form. We thank our attendees for their help in keeping the event welcoming, respectful, and friendly to all participants.