Principal Cloud Architect at Hypervision Surgical

I am Cal¹ Bryant. I’ve spent over a decade building software² for regulated healthcare. I’m now the Principal Cloud Architect at Hypervision Surgical, designing and building its AWS platform, surgical device PKI and security monitoring.

Before that I spent 12 years at Cydar building CE/FDA-regulated software: a distributed GPU image registration pipeline, a hospital PACS gateway, an edge auto-update system and SAML2 single sign-on. Later I led the engineering team there as VP of Engineering, while staying hands-on.

Short for Callan ↩︎
And, occasionally, hardware design and embedded systems. ↩︎

How I work

I aim to make myself operationally redundant through automation. If infrastructure is code, changes are reviewed, and environments can be rebuilt and audited. Decisions should be traceable without relying on someone’s memory.

I prefer boring, well-understood technology. The simplest design that solves the problem is usually the right one. Every additional moving part brings something else to secure, validate and maintain.

I enjoy mentoring and working closely with engineers. I want people to own their work, make decisions and develop their judgement. My job is to give them the context and support to do that.

Problems should be raised early, even when they’re uncomfortable. In regulated products, finding a risk during design is far cheaper than finding it in the field. People need to feel safe raising concerns, including when something has gone wrong.

I spend a lot of time building tools for myself and the team: reproducible development environments with Nix, CI checks and small CLI utilities. I like removing friction from engineering work, and good tooling makes a real difference to how reliably a team can deliver.

Connect with me

Get in touch via email, X or LinkedIn. I’m also on GitHub.³

I enjoy meeting people⁴ and building things with them. I’m usually happy to give a talk on anything on this website. Send me a message if you’d like me as a speaker.

My CV is available as HTML or PDF.

Of note, dstask (terminal git-powered todo app) and dsnet (quick WireGuard VPN manager) ↩︎
Happy to chat about technology, engineering, electronics, or anything else. ↩︎

My spare time

I enjoy writing software, electronic design, DIY, coffee, HiFi audio and badminton. I chair the local club. I live in Cambridgeshire with my wife, 2 daughters and our cat.

I try to blog every few months, covering projects and guides. I publish when I’ve built something new, solved a problem or worked to understand something.

Testimonials

Some (anonymous) 360-degree feedback excerpts from reports and peers circa 2024:

Cal is an elite engineer and inspiring leader. He has been central to my development and has enabled me to thrive. Cal empowers his team and trusts them to make decisions, which is key to creating high-performing teams.

Cal is an exceptional manager with an always positive attitude and strong belief in his team. He’s always ready and happy to offer support, and I’ve learned a great deal from him. His talent for breaking down complex technical concepts, explaining them clearly, and guiding through the development process has been instrumental in my growth. I think what I like most is that he is extremely technical; understands the development process and how developers work, so is a great advocate for the team.

Cal is extremely technically competent across the whole range of our software development, and has a good handle on the connected areas like Ops and UI.