Constraint-driven engineering
Full-stack engineer for operational tools
I adapt fast to what the problem needs. Next.js/TypeScript for browser-deployed tools, scripts for local automation, and prototypes that pull data from device sensors when required. The goal is always the same: find the solution that fits the environment and gets used.
Built for regulated operations and real-world constraints.
My projects are shaped by shared devices, connectivity gaps, data policies, and limited integrations.
I ship browser-deployed tools (often offline-first), automate tedious steps with scripts when needed, and build prototypes that turn sensor streams into usable UI.
Flagship Projects
A curated view of the work I would want a new collaborator to see first.
Barcode Scanner Inventory Tool
ShippedLightweight PWA that captures barcodes and outputs inventory spreadsheets
- Fast workflow with option to edit entries
- One-click CSV export for Excel/email submission
- No backend needed for core functionality
CPR Trainer
In progressThesis prototype: a training PWA that turns smartphone/wearable accelerometer data into real-time CPR (cardiopulmonary resuscitation) compression feedback and session review.
- Real-time feedback loop for compressions
- Session capture and replay (prototype stage)
- Built for validation/calibration on a CPR simulator
Nuclear Medicine Dose Calculator
ShippedDosage calculator for radiopharmaceutical preparation. Models isotope decay to compute the required volume for a target activity at a chosen administration time.
- Supports most isotopes used in SPECT imaging
- Designed for restricted environments (no installs, no logins required)
- Easy tracking for multiple SPECT kits per day
How I can help
I build practical software for teams that need reliable tools, working prototypes, or interfaces connected to real-world workflows and devices.
Product prototypes
Turn an idea into a working web prototype or PWA that can be tested quickly.
Internal tools
Replace manual steps, spreadsheets, or fragile workflows with focused software.
Hardware-connected apps
Build web interfaces for sensors, devices, and streamed data.
Operational tools
Create domain-specific tools when off-the-shelf software does not fit the job.
Working style
Low ego, collaborative, and outcome-driven. I do my best work when the goal is clear, expectations are explicit, and the team optimizes for solving the problem together, rather than competing internally.
- Clarity first: I write down assumptions, constraints, and acceptance criteria before building.
- Judgment on tooling: I choose stacks that minimize setup and maximize delivery speed and maintainability
- Reuse where it makes sense: I lean on proven modules for predictable behavior. If reuse would bend the design, I build a clean, modular fit instead.
- Ownership: I follow through with fixes, polish, and documentation until it's stable.
- Growth mindset: I welcome feedback, ask for it early, and iterate fast.
Education
- MSc Biomedical Engineering (in progress): VŠB – Technical University of Ostrava • Expected 2026
- BSc Radiography: ČVUT – Faculty of Biomedical Engineering • 2016
Professional reference available (UK NHS).
Work with me
Open to remote roles and contract work. If you're building a product, prototype, or internal tool, feel free to reach out.
Email: petr@choniawko.dev