Held annually · Annual Summit Host · Qingdao Huo15 Information Technology Co., Ltd.

JOSS Jiaodong Peninsula
Software Open Day Summit

JOSS is a stage for open-source software developers to share and for the open-source community to thrive. Held annually on the Jiaodong Peninsula, it brings open-source developers, enterprise users, university faculty and students, and the open-source community face to face.

Submit a talk See past works About the host

JOSS × POSTDOC

Postdoc Entrepreneurship Summit · Qingdao

About JOSS

An annual stage built for open-source developers

JOSS (Jiaodong Open Source Summit) is hosted by Qingdao Huo15 Information Technology Co., Ltd. We believe the open-source community thrives through "sharing" — when someone is willing to take their code, experience and hard lessons to the stage and explain them clearly, others are willing to pick up the baton and carry on.

Each JOSS includes · the Keynote Stage (open-source trends + enterprise case studies) · the Hackathon (a 48h coding marathon for Jiaodong developers) · the App Expo (a community works fair) · campus sessions (open-source classes on campus).

1 / year

Held every year

3 days

Keynote + Hackathon + Expo

Open

Free admission · community-led

Summit Agenda

Three stages, one community

TRACK 01

Keynote Stage

Open-source trend insights, enterprise case studies, core-maintainer AMAs. Topics decided by community vote.

TRACK 02

Hackathon · 48-hour coding

Jiaodong developers gather to build open-source projects around the annual theme in 48 hours. The output goes straight into the community repository.

TRACK 03

App Expo · works fair

A community works showcase — past award-winning projects like Card Universe and Qu-Ji can be experienced on site.

Community Works

Past community works

These are open-source projects first unveiled on the JOSS stage and continuously maintained by community members. You can bring your project to the stage too.

App 01

Card Universe

Turns offline business cards into a searchable, graph-mappable digital network; the community can build its own meetup graphs.

App 02

Qu-Ji

An open-source check-in app for walking the city; the community can contribute places, stories and sounds.

MODULE 01 · Cards

Card module · Card Universe

A digital business card built for developers, founders and community members. Multiple identities per person, switchable across scenarios; the card is no longer a PDF or paper slip, but a searchable, graph-mappable, real-time communication entry point.

Multi-identity cards

Many cards per person: founder / speaker / volunteer and other roles switch by scenario.

Scan to exchange

Scan once at a meeting to add to contacts and auto-generate a relationship-graph node.

Views & interactions

Who viewed my card, who saved it, who liked it — sense community buzz in real time.

Direct messages

No third-party WeChat — one-to-one DMs, groups and announcements directly in the app.

Multi-identityQR scanViewer profilesRelationship graphIndustry/tag filterDM groupsAnnouncementsOn-chain card proof

Card list · multi-identity

Card detail · multiple IDs per person

Edit card · personalize

Message list · real-time chat

Qu-Ji feed · pulse of the city

Post an offline event · in one step

Checking in · geolocation check-in

Event detail · sign-up and social

MODULE 02 · Qu-Ji

Qu-Ji module · Qu-Ji Timeline

An open-source check-in and content community built for "walking the city." Discover nearby offline events, meetups, bookstores and exhibitions, with check-in, likes and sharing to capture every interesting moment.

Qu-Ji feed

A feed aggregated by city, interest and friends, with filtering for offline events.

Post content

Text-and-image / grid / short video; switch between life sharing and offline events in one tap.

Geo check-in

GPS-verified check-ins, with check-in badge collection.

Event sign-up

City feedOffline eventsCheck-inText & videoEvent sign-upTopic sharingGeofencingSocial interaction

Call For Proposals

Bring your open-source story to JOSS

Whether you maintain a 100-star tool or are a student who just read through some source code and wants to share takeaways — the JOSS stage is reserved for you.

Submit a talk by email Learn about partnership & sponsorship

Host: Qingdao Huo15 Information Technology Co., Ltd. · Contact: postmaster@huo15.com

JOSS Jiaodong Peninsula
Software Open Day Summit

Held annually · here for open source

Hosted by Qingdao Huo15 Information Technology Co., Ltd.

What is JOSS

JOSS is a stage for open-source software developers to share and for the open-source community to thrive. The summit is held annually. The host is Qingdao Huo15 Information Technology Co., Ltd.

Keynote Hackathon Expo

TRACK 01

Keynote Stage

Open-source trends · enterprise case studies · core-maintainer AMAs; topics decided by community vote.

TRACK 02

Hackathon · 48h

A 48-hour coding marathon for Jiaodong developers, building open-source projects around the annual theme.

TRACK 03

App Expo

A community works fair — experience projects like Card Universe and Qu-Ji on site.

Community works

APP 01

Card Universe

Turns offline business cards into a searchable digital network

APP 02

Qu-Ji

Open-source check-in for walking the city

APP 01

Card Universe · graph

Relationship-graph visualization

Card module · Card Universe

Multi-identity switching · scan to exchange · viewer profiles · one-to-one DMs — turning offline business cards into a searchable, graph-mappable digital network.

Card list

Card detail

Edit card

Message list