C++ Day 2025: Wrap-up post

On October 25th, we were super happy to host C++ Day 2025 in Pavia at SEA Vision’s venue! This one-day community event brought together 165 attendees to enjoy tech talks, networking, and activities around C++ development.

Here is the classical wrap-up post.

Some information:

the event was totally free to attend
total number of attendees: 165

The event had 4 sponsors which covered the event costs:

SEA Vision (main sponsor, co-organizer and host)
ELT
Develer
SIGEO

Thanks to all the speakers and attendees!

Some pictures of the event are here on our Facebook page.

Some stats

What’s your experience with C++?

I don’t know C++: 5%
Novice/Student: 17%
Fluent: 57%
Expert: 21%

Are you a student?:

Yes: 9%
No: 91%

Which C++ standard do you use the most?

I don’t use C++: 6%
C++98/C++03: 3%
C++11: 11%
C++14: 9%
C++17: 31%
C++20: 31%
C++23: 9%

Are you looking for job opportunities?

Yes: 38%
No: 62%

Your company (optional, aggregated without duplicates):

Adesso Schweiz Ag
Alten
Ambarella
Area Spa
Argo Vision
Ats
Autosoft Multimedia Srl
Be Agile
Bloomberg
Brooks
Capgemini
Cineca
Comelz S.P.A.
Danieli Automation
Datacolor Industrial
Daze Technology
Digitec Srl
Dynatrace
Eggtronic Engineering
Elt Group
Fives Intralogistics
Haas F1 Team
Innova Spa
Intecs Spa
Kdab
Leonardo Spa
March Networks
Marchesini Group Spa
Mediobanca
Meta
Microsoft
Mozarc Medical
Nacon Studio Milan
Newtwen
Politecnico Di Milano
Randstad Digital
Retelit
Rossini Energy Srl
Sadel Spa
Schindler
Sea Vision
Sinthesi
Smart Secuirty Sw
Softcube Srl
Teiacare Srl
Teoresi Spa
Tetra Pak
Texa Spa
Ubisoft
Unibo
Unige
Unipv
Vixevo
Zuru Tech Italy

Structure and contents of the event

C++ Day 2025 was a one-day event focused on C++ development, featuring a single-track program of technical talks, interleaved with 2 coffee breaks and lunch.

The schedule included multiple speakers:

Alberto Barbati: Zero or More: A Tour Through C++ Techniques for Returning Multiple Values
Daniele Pallastrelli: Delegating Behaviors in C++: A Practical Tour of the Available Mechanisms
Denis Yaroshevskiy: SIMD substring in a string
Stefano Fiorentino: Mocking the UART in C++: A Hands-On Approach
Massimo Fioravanti: Interactive Program Design in C++: A Taxonomy for Practitioners
Marco Marcello and Jonathan Marriott: 8 Queens at Compile Time: A Journey from C++03 to Modern C++

All talks are available for watching on YouTube.

Main topics:

Modern C++ techniques
Best practices
Performance optimization
Metaprogramming and compile-time programming
Embedded systems and IoT

C++ 40th birthday

During the closing message, we celebrated C++’s 40th birthday with a fun, interactive 80s-themed quiz game.

The venue was also decorated with themed posters:

And here’s the traditional “Happy Birthday” song, sung by all of us in honor of C++:

Issues

No major issues were reported; the venue provided a professional environment with comfortable spaces for talks, networking, and catering.

The only issue (and a lesson for both us and the host) was that the support screens, intended to help attendees in the back see the slides, were positioned too low, making them difficult to view properly.

Feedback

About 30% of attendees gave feedback (this is aligned with last time, in 2023) and we are glad the results were very good. In addition, all the talks were appreciated, getting high rates.

See you next time!