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Developer Summit

Web Summit Lisbon ・ November 9-12, 2026

Developers become system designers

Meet the leading developers who joined us

Greg Brockman - OpenAI

Greg Brockman

Co-founder & CTO
Open AI

Michelle Zatlyn - Co-founder and President - Cloudflare

Michelle Zatlyn

Co-founder & President
Cloudflare

Craig Federighi - Web Summit

Craig Federighi

SVP of Software Engineering, Apple

Cassie-Kozyrkov - CEO - Data Scientific

Cassie Kozyrkov

CEO, Data Scientific

Amjad Masad - CEO - Replit

Amjad Masad

Co-founder & CEO
Replit

Thomas Dohmke - GitHub

Thomas Dohmke

CEO
GitHub

Rebecca Parsons - Toughtworks

Rebecca Parsons

CTO
Emerita, Thoughtworks

Anton Osika - Co-founder & CEO - Lovable

Anton Osika

Co-founder & CEO
Lovable

Emil Eifrem - Neo4j

Emil Eifrem

Co-founder & CEO
Neo4j

Meredith Whittaker - Signal

Meredith Whittaker

President
Signal

Headlined by industry-leading organisations

Insights from the developers, engineers, and builders creating the technologies of tomorrow.

Code is no longer the main abstraction

Software development is shifting from writing code to orchestrating AI agents, models, and tools. The new developer stack is defined by systems that generate, adapt, and execute where understanding architecture matters more than syntax.

Everyone’s a dev now

Dismantling the proprietary stack

How secure are you?

Disentangling quantum

As AI’s capabilities continue to expand, what does this mean for the developers of the future?
What can be done to create synergy between engineers and the tools they use?
Is software development still a viable career in the wake of vibe coding and the assistants that enable it?

Everyone’s a dev now

Dismantling the proprietary stack

How secure are you?

Disentangling quantum

Generative agents let anyone vibe-code a prototype in minutes, but the open-source ecosystem is fracturing under a flood of automated pull requests and synthetic contributions. Yet, this same chaotic democratisation is how builders are dismantling proprietary moats.
Through model merging and local execution, developers are bypassing corporate gatekeepers to reclaim the software stack.

Everyone’s a dev now

Dismantling the proprietary stack

How secure are you?

Disentangling quantum

Online safety is an arms race, and AI has accelerated it. As cyberattacks become more sophisticated and AI-generated code going unvetted for compliance, applications, devices, and systems have never been more vulnerable.
In a world that’s increasingly lacking shutdown protocols, how can we safeguard our security?

Everyone’s a dev now

Dismantling the proprietary stack

How secure are you?

Disentangling quantum

As quantum transitions from experimental to practical applications, the technology is slowly becoming embedded in industry. What developments will quantum empower in healthcare, finance, and AI? And what do the builders creating quantum infrastructure believe will come next?

Highlights from our events

Insights from the leaders, builders, and thinkers driving the AI revolution.

Own what you build: Open source and AI’s future

Own what you build: open source and AI’s future

What happens when the tools we build on no longer belong to us? In this talk, Mark Surman argues that we’re repeating the mistakes of the early web – renting our digital future from trillion-dollar landlords – and breaks down how Mozilla is fighting back with open-source, mission-driven AI ventures.

Open source

AI

Your graph is your moat: Knowledge and context are the big AI unlock

Your graph is your moat: knowledge and context are the big AI unlock

Neo4j CTO Philip Rathle broke down why 2026 became the year of context. He highlighted how context graphs, knowledge graphs, semantics, and ontologies flooded the AI landscape, positioning graphs as the ultimate unifying foundation.

Knowledge graphs

Context

From bits to qubits: The next computing stack

From bits to qubits: the next computing stack

David Carmona, VP of Discovery and Quantum at Microsoft, and Stephanie Simmons, Founder & Chief Quantum Officer at Photonic, explored how AI, quantum computing, and real-world systems were converging into a new computing paradigm.

Quantum

AI

When software becomes a user

When software becomes a user

1Password CTO Nancy Wang and Genspark co-founder & COO Wen Sang explored how autonomous AI agents operating without human oversight have rewritten the rules, shifting management from governing people to controlling digital actors.

AI agents

Autonomy