Profile picture

Callan Bryant MEng

Head of Engineering at Cydar, a medical analytics company. Accomplished leader and engineer with a broad skill-set & proven track-record. I build teams, deliver leadership and innovative software + electronics systems.


You may also want to take a look at my blog and about page. This CV is also available as a PDF.

Download CV as PDF icon
Download CV as PDF

Career

I enjoy many aspects of engineering, from detail oriented design to leadership and strategy. I want to lead the way, building something world-changing. Motivated by interesting problems.

2022-nowCydar MedicalCydar Medical Head of Engineering

Leading and growing the wider engineering team. Interface between business needs and technical delivery; architecture & strategy. Ownership of dev. process, improvement of the product. Driving value to achieve business goals and ROI.

2017Cydar MedicalCydar Medical Principal engineer

Project & team leadership, development of various high-profile Cydar cloud components necessary to bring Cydar EV to the operating theatre with a good user experience. Team leadership plus larger project groups.

2014Cydar MedicalCydar Medical Senior engineer

Implementation of a distributed compute system to bring a prototype 2D-3D registration system to clinical usefulness. Development of a PACS gateway to enable access CT scans inside the hospital network via the cloud.

2013BroadcomBroadcom Systems design engineer

Full SoC and PCI-E partition on Virtex 7 Synopsys HAPS FPGA Clusters, significant improvements to muxing hardware for emulation of SoC, development of web based Cadence Palladium resource sharing system.

2012BroadcomBroadcom Summer intern

Vertex 7 HAPS FPGA cluster bring-up & testing with pattern checking HDL. For new SoC, design and implementation of CI web dashboard.

2010BroadcomBroadcom Year-in-industry intern

Year in industry. Design of development boards including stereoscopic camera add-on, implementation of automated testing system, lab + budget management, technical duties.

Featured projects

Selected projects that I have professionally produced and are able to talk about are listed here. See my blog for personal projects.

2024Cydar medicalCydar medical CT follow-up transfer system

Technical architecture and project manangement for a batch based follow-up CT scan transfer system to transfer tens of thousands of CT scans for later processing to enable end-to-end patient care.

2023Cydar medicalCydar medical Surgery planning tool

Project management and delivery strategy to deliver an improved planning tool for use with Cydar Maps

2020Cydar medicalCydar medical In-theatre remote control

Custom-designed remote control interface for in-theatre use. Involved the co-ordination of initial research, UX consultants, UI, hardware and the development of embedded firmware for a LoRa RF USB remote. Long range, decade battery life, low latency. Highly reliable, deployed worldwide.

2019Cydar medicalCydar medical Deformation adjustment feature

Project leadership of the Cydar EV Deformation adjustment tool to increase update the anatomy within maps. This involved leadership of a team of 8 engineers to co-ordinate and prioritise work and deliver for commercial uplift.

2020Cydar medicalCydar medical Auto-update and remote process manager

Auto-update system for deployment of edge-based software within the hospital such as in-theatre kiosk, case recorder and PACS gateway. Minimal-downtime deployments and remote troubleshooting. Architecture audited and penetration tested by NCC group.

2017Cydar medicalCydar medical SAML2 based single-sign-on provider

Implementation of a secure SAML2 AP enabling integration with hospital SSO running Shibboleth, Microsoft ADFS / Azure and others. Work to prevent attack vectors. Penetration tested by NCC group.

2017Cydar medicalCydar medical PACS DICOM / web gateway

Created an edge-deployed PACS gateway to automate the query & retrieval of CT scans (DICOM) from hospital PACS on behalf of clinicians using Cydar’s products. Strong concurrency/queuing model with real-time progress and self-update mechanism. In use since 2017 in 50+ hospitals.

2014Cydar medicalCydar medical Distributed content addressable object store

Content-addressable object-store built upon S3 and Redis to allow low-latency access to data referenced by SHA-256 digest. Intrinsic automatic de-duplication and integrity guarantees. Critical for Cydar’s patient data and real-time registration pipeline.

2014Cydar medicalCydar medical Distributed GPU compute system

As part of a challenge and business need to improve Cydar’s 2D-3D image registration performance, I designed a low-latency work-distribution system using Redis and a custom content-addressable storage system to reduce the registration time from 50 seconds to under 5 seconds.

2013BroadcomBroadcom Muxing scheme in FPGA cluster

A faster multiplexing system was required to increase core-clock frequency. I developed a new system involving source-synchronous clocking. The new design was capable of 4.5x SoC core clock improvement decreasing costs and increasing productivity 2x

2011BroadcomBroadcom Stereoscopic camera development add-on board

2 daughtercard designs allowed a development kit to interface 2x CSI cameras with shared clock and a Sharp auto-stereoscopic 3D display. This required some investigation and defensive design as datasheets were not yet available.

Education & Qualifications

Master of Engineering (Electrical and Electronic) with Industry
1st Class Honours
2008-2013

Isolated, scalable battery management system with individual cell voltage & temperature readout. P/I based current-mode 0-300A 2x16kW DC motor controller for formula student. Year in industry at Broadcom, mobile multimedia group.

Minor Qualifications
DateInstitutionQualificationClassification / levelDescription
2024The Knowledge AcademyScrum Master CertificationFullAgile course; purpose: integrating Scrum into Cydar and its QMS
2021RSGBAmateur radio licenseFoundationCallsign: M7NBD
2008East Norfolk sixth form collegeAS & A levelsABBC ACDAS-Levels: Electronics, Computing, Physics, Maths A-levels: Electronics, Physics, Maths
2008DVLAUK Driving LicenseFullClean, no endorsements
2006Kirkley high schoolGCSEsAAABBBBBCCC

Skills & Technologies

The technologies & tools I’ve worked with

★★★★★★★★★☆★★★☆☆
Programming LanguagesPython, Go, CSS3, HTML5, Bash, Embedded C, OpenSCAD, JavascriptTypescript (nodejs/browser), C/C++, OO PHP, SQL, LaTeXPerl, Objective C
Software/toolsGit, Github / Gitlab, Jenkins, Jira, CSS3 + HTML5, GnuPG2, Linux (Ubuntu, buildroot, Fedora, RHEL, etc), Ansible, AWS, Hugo, Wireguard, Django, RedisPerforce, ZFS, Agile (Scrum/Kanban), DevOps, OKRs, NixOS, nftables/iptables, React, Docker/containersKubernetes, SVN, FreeBSD, Quality systems, ISO 13485 QMS, IEC 62304 Medical device software
HardwareElectronic/electrical circuit design & troubleshooting, Ultra low power electronicsOrCADSystemVerilog, Symplify/Certify, Vivado, LibrePCB, KiCAD, XDC/SDC constraints
Practical/Other SkillsFine-pitch soldering, 3D printing (FDM), Network administration & designSMD Rework, WoodworkMIG Welding

Hobbies & Interests

I detail some of my hobbies on twitter and my blog; they include software, electronic design, home DIY, kayaking, running and cycling. I live in Cambridgeshire with my wife, 2 daughters and our cat. I created and maintain 2 successful open source projects: dstask (task tracker) and dsnet (VPN management). Dsnet is used in production within several companies.

References

Available on request only.