Climate and energy software
Dynamic tariffs, EMS, VPP, demand-side flexibility, balancing markets.
Fractional CTO / Technical advisor / Warsaw
I help climate, energy, and AI founders ship hard technical products without hiring a full senior team yet.
CTO at Pstryk, where I built the platform behind Poland's first dynamic electricity tariff. 17+ years across IoT, energy markets, AI, and high-throughput backend. Currently taking a small number of fractional CTO, technical advisor, and due-diligence engagements.
Where I'm useful
IoT at scale
MQTT fleets, edge/cloud architecture, time-series at high throughput.
Building with AI
LLM integration, computer vision, agentic workflows in production.
Engineering leadership
Team building, architecture review, technical due diligence for VCs.
Recent thinking
all posts →-
Dynamic tariff customers are supposed to tune out. Ours open the app 23 times a month.
The conventional wisdom is that dynamic tariff customers check the app out of novelty and then forget it exists. Pstryk's data says the opposite. Here is what real engagement looks like and what it means for how you build.
6 min read -
EMS architecture: when local control beats the cloud round trip
An EMS that round-trips every decision through the cloud is going to disappoint someone, eventually, in a way that costs real money. The right split between edge and cloud is a latency budget question, and once you frame it that way the architecture writes itself.
8 min read -
MQTT at fleet scale: what a few thousand IoT devices and one bad Postgres password taught us
A misconfigured Postgres credential turned an ordinary EMQX cluster into a 50,000-connection-attempt-per-minute self-DDoS. Here is what we changed about authentication, observability, and runbook design after that night.
7 min read -
The fractional CTO playbook: what four hours a week actually buys you
Four hours a week is enough to fix architecture, hiring, and roadmap if you spend it on the right things, and useless if you spend it reviewing pull requests.
6 min read -
Green Energy in Europe: We Built It. Now Comes the Hard Part.
Sometime in 2025, Europe quietly crossed a line that would have been unimaginable a decade ago. Wind and solar generated more electricity
7 min read -
Vertical Farming: Tech-driven solutions for sustainable food production
If you've spent any time in climate tech, you've probably noticed that energy and transport get most of
4 min read -
EV Battery Innovations: Solid-state batteries and their commercial viability
tl;dr - Solid-state batteries have been "five years away" for a decade. In 2026, that's actually starting
6 min read -
IoT in Energy Monitoring: Smart Meters and the Consumer Engagement Problem Nobody Talks About
We've been putting "smart" in front of "meter" for over a decade now. Utilities across Europe
4 min read -
Building Decarbonization: Smart buildings and energy efficiency tech
tl;dr Buildings account for roughly 40% of global energy-related emissions. Most of that is operational - heating, cooling, lighting - and
8 min read -
V2G Technology: How electric vehicles are becoming mobile power plants
EVs aren't just loads on the grid. With bidirectional charging, they're distributed storage - capable of supporting your
6 min read -
Virtual Power Plants: Aggregating distributed energy resources
There's a quiet revolution happening on the grid. Millions of small energy assets - rooftop solar panels, home batteries, EV
5 min read -
AI in Predictive Maintenance: Reducing downtime across industries
tl;dr: Every unplanned hour of downtime costs an auto plant roughly $1.3M. AI-driven monitoring can cut those surprise outages in
5 min read