Lamia Flow hackathon 28.9. - in cooperation with HSL

Lamia Flow presents: developing public transportation with HSL! Our hackathon themes revolve around the HSL open APIs - you can bring your own project or dive into our ready projects and teams.

Lamia Flow hackathon with HSL

Welcome to develop better public transport with Lamia and HSL in our hackathon on the 28th of September 2019.

Time and place

The hackathon starts on Saturday 28th of September at 12:00 and continues for all of Saturday and even Sunday for as long as you need for your project. The project presentations are on Sunday the 29th of September at 12-15, giving you time to go home in between and come back to present your project with your team.

The hackathon is organized in Helsinki, at the Lamia office in Kamppi - Runeberginkatu 5 B, 6th floor.

Agenda and themes

The day will start with an introduction presentation from HSL by Sami Räsänen. From there we will divide into teams and assign projects. We are utilizing the HSL open APIs for the hackathon.

Do you have a public transport problem in mind? Great, write it up as an open project when registering and we'll make it happen together! Perhaps you don't have a ready idea but would like to dive into the public transport scene - that's great too. We will have ready projects you can work on with your team in the above categories. Some of the ready-themed teams are led by Lamia developers.

The themes are:

  • Real-time data visualization - Public transport services generate masses of data every second with a lot of valuable information. Projects in this category are supposed to present HSL data in an interesting and understandable way, making HSL operations and their scope visible to the public.
  • Real world problems - Making public transportation efficient is a significant issue in all big cities. In the Helsinki area HSL is actively developing public transportation and also providing a lot of useful open data for the development. Projects in this category will focus on a few identified common real-world problems where the public transport user experience could be improved.
  • Open project - Do you think you have an idea for really great public transport project, but it doesn't apply to the previous categories? No problem! We offer an "open project" category, where you can participate with your own project!

Here are some ready-themed projects that you can join:

Tran Jam
Build a tram passenger count estimation service with us. How to estimate the number of passengers on trams without any device installations on the vehicles? We already built a rough model for estimating the passenger counts utilizing certain data sets - can we make it accurate enough and build a frontend for it? You might have to board a tram for this project! (HSL day ticket included for all project participants)

The Passenger
Travel around the world with HSL without leaving the couch? We will build "The Passenger" who will do just that. Can we guide him/her remotely between jungles of stops, make experience traffic jams and survive track failures? Let's create a virtual public transportation adventure!

Brokebike Station
Ever gone to get that last city bike just to find out that it's broken, and that's why no one has taken it? No more! Let's build a service that estimates how many city bikes are broken on any given station.

Know Your Neighborhood
Maybe you’re looking for a new home and would easily like to find a convenient location or compare areas based on your commute to work? We are building a service for comparing areas based on public transport quality - visualizing the public transportation cost and travel time between any given point A and B on the HSL map.

Teams and participant profiles

You will be working in teams of approximately 4-7 people. You can register a whole team or just yourself and we will give you a team on the day.

Developers, data scientists, business minds, designers, all profiles – experienced or junior – are all welcome to the hackathon!

What to bring

Space, food and drinks are offered by Lamia throughout the hackathon. Bring your own laptop!


The event is full but we might have some cancellation spots still available. If you're interested to join, please contact

The event is free of charge for all participants.

We will publish a compilation video of the event afterwards. In addition, the project presentations will be recorded and published.

Lamia Flow event participants agree to our Code of Conduct.

Lamia Flow hackathon with HSL