About

I’m Julien Vermillard, IoT architect and engineer.

I work on connected products from device firmware to cloud services. For more than 20 years, I’ve been building software and working through the problems of connecting and maintaining devices.

Julien Vermillard

What I’m working on

My recent contributions to Zephyr include LwM2M telemetry scheduling and Fibocom LE250 modem support. Both were merged into the project. I also contribute to networking libraries in Go and Rust.

I build Anchor, an open-source device management server, alongside my consulting and engineering work.

Earlier work

At Sierra Wireless, I was Sr. Director of Architecture, working on IoT platforms serving millions of devices. I founded and contributed to Eclipse Leshan.

My open-source network programming work goes back to Apache MINA in 2006, with later contributions to Californium and Wakaama.

See my open-source work and technical articles.

How we work together

I’m an independent consultant and your technical point of contact. I can review an architecture, investigate a problem or join your team to implement changes.

When a project needs more capacity, I bring in senior engineers I’ve worked with, covering embedded systems, electronics, cloud and applications.

Public sessions

Speaking & demonstrations

Wireless Logic & Avel Technologies · Toulouse

CRA product design, secure updates and vulnerability handling. Announced for , in Labège.

Event announcement

CAP’TRONIC & IUT · Béziers

Cyber Resilience Act session by Julien Vermillard. Announced for .

Programme & speakers

Embedded World · 2026

Device management, ownership of the stack and firmware updates, with a Zephyr demonstration.

Talk, slides & demo

October sessions are listed as announced on 9 October 2026. See the organisers’ pages for current event details.

CRA presentation material

My Montpellier presentation covers product scope, requirements and an IoT engineering example.

Read the Montpellier slides.

Let’s talk about what you’re building.

Tell me about your product and the problem you need help with.