Greetings!I'm Oleh

I build software engineered to perfection.

10+ years deep in the web, from high-load platforms to real-time IoT dashboards, and years of mobile apps on top. I'm language-agnostic: the problem picks the tool, not the other way round. And nothing makes my day like a new, hard challenge.

See my work Let's connect →

My Personal Challenges

Project Atlas
- Mobile IoT app
- Since 2026
- Design & development
An IoT telemetry platform in your pocket. Engineers, industrial operators and vending businesses watch every water system live and control it from their phone.
Goal
Run water systems remotely from live telemetry, from home filters to industrial plants and vending machines that sell water, without standing next to them.
Task
Build the app from scratch: product design, UI/UX, business logic, the real-time layer over MQTT and WebSockets, and the delivery pipeline to both stores.
Profit
One codebase ships iOS and Android together. Operators see alerts the moment they happen, and vending owners see revenue, sessions and cash per machine.
Time
Checking a plant, flushing a unit or counting a vending day takes a look at the phone, not a trip to the site.
FlutterDartRiverpodMQTTWebSocketsReactNestJSAWS
- App Store
- Google Play
Read the story→
Dynamo
- Desktop app for hardware
- 2026
- Design & development
A desktop bench app for the Wise Water factory. It takes a bare ESP32 board out of the box, gives it an identity, flashes its firmware, prints its label, and puts it on Wi-Fi, all without a terminal.
Goal
Let any operator prepare a controller for a water unit, with no terminal and no manual.
Task
Replace four hand-run tools (esptool, an NVS generator, a SPIFFS builder and a serial monitor) with one desktop app for macOS, Windows and Linux.
Profit
Plug a board in and it is initialized, flashed, labelled and on Wi-Fi from one screen. Drivers and the toolchain install themselves.
Time
Four terminal tools became a single run that takes from ten seconds to a couple of minutes.
FlutterDartRiverpodESP32Bluetooth LEPython
- macOS
- Windows
- Linux
Read the story→
Orion
- Desktop app for hardware
- 2026
- Design & development
A calibration bench for Wise Water's osmosis controllers. It runs a controller against a reference flow meter and writes the corrected constants back, so every litre it reports is a real litre.
Goal
Make every litre a controller reports a real litre.
Task
Run a controller against a reference flow meter and write the corrected constants back, with no way for the operator to get the direction wrong.
Profit
Calibration is one guided command. It stops as soon as both boards agree within the target, and every run is kept in the history.
Time
A round takes about a minute, with no manual maths and nothing typed in by hand.
FlutterDartRiverpodESP32Python
- macOS
- Windows
- Linux
Read the story→

Before we go on…

A little about me

I'm not just the tech guy. I love to travel, get lost in a forest for a day, and stare at mountains, even though I've barely been on a real hike yet. And I love good hardware: the kind you want to open up just to see how it's made.

Get to know me→

Where I've been

The road so far, from the first lecture to today. Pick a stop to see what I did there.

Since 2013
Kyiv Polytechnic Institute
MSc, power generation & control systems
Relay protection and automation: systems that have to work every single time.
Since 2016
Freelance
QA, Frontend2 projects
Where it started: testing other people's products, then building my own frontends for small clients.
Since 2018
SoftServe
Fullstack Engineer6 projects
Enterprise web platforms: from my first production Angular to leading teams, shared libraries and team processes.
Since 2023
Watson Title Services
Fullstack Engineer
Closing-cost calculators for US real-estate agents, where every number has to be exactly right.
Since 2023
Stella Sun Studio
Fullstack Engineer
An online store for illustrated gifts, end to end: storefront, backend, design system and AWS.
Since 2025
Beetroot
Technical Lead5 projects
Leading product teams on client platforms: architecture, Storybook design systems, real-time features and team processes.
Since 2026
Wise Water
Lead Mobile & Fullstack Engineer
The mobile app for smart water treatment, plus Dynamo and Orion for the factory, built from scratch.

Fun fact: I rebuilt my first PC at eight. More about me →

From idea to production

Every project goes through the same ten steps with me, and none of them is someone else's problem. Keep scrolling to follow the signal.

Planning

Before a line of code: what we solve, for whom, and what done looks like. Then I cut the work into small pieces that can ship on their own.

From idea to production

Every project goes through the same ten steps with me, and none of them is someone else's problem. Keep scrolling to follow the signal.

1. PlanningBefore a line of code: what we solve, for whom, and what done looks like. Then I cut the work into small pieces that can ship on their own.
2. ProcessesReview standards, branching, release flow, how the team talks. I design the way we work like any other feature, and keep improving it.
3. ArchitectureClear boundaries, predictable state, boring abstractions. Shaped so the next feature is assembly, not a rewrite.
4. UI/UX designI design the flows and screens myself, then turn them into a design system with tokens, so design and code speak one language.
5. AnimationsMotion that explains what just happened: transitions, feedback, micro-interactions. Smooth, light on the GPU, and calm when you ask for less motion.
6. InfrastructureEnvironments, CI/CD, monitoring and cost on AWS. The cloud is shaped to fit the app, not the other way round.
7. DevelopmentLanguage-agnostic: Angular, React, Flutter, Node, Python, whatever fits the problem. Typed, readable code the next person can own.
8. Self-checkNobody sees my work before I have broken it myself: unit and E2E tests where they pay off, and a real click-through of every flow.
9. The grindThe weird bug nobody can reproduce, the last 10% of polish, the release that has to go out tonight. I stay with it until it works.
10. Hard problemsReal-time data, real hardware, unclear requirements. The harder the task, the more I want it.
Production

What I work with

Framework-agnostic by mindset: tools are picked per problem. Bold ones are my daily drivers.

Frontend

My home turf. Deep Angular expertise, large-scale apps, state-heavy and performance-critical UIs.

Angular
TypeScript
RxJS
Signals
React
Next.js
Vue
SCSS
Tailwind
AG Grid

Mobile

Cross-platform apps talking to real hardware in real time.

Flutter
Dart
Riverpod

Backend

Services with clean API contracts that stay cheap to run.

Node.js
NestJS
Python
FastAPI
Django

Cloud

Shaping AWS infrastructure so it fits the application, not the other way round.

AWS
AWS Lambda
S3
CloudFront
Cognito
IoT Core
Terraform

Data

Picking the store for the access pattern: documents, relations or time series.

PostgreSQL
DynamoDB
MongoDB
Firebase
Aurora
Timestream

Design

Component libraries that let several teams ship in parallel without stepping on each other.

Storybook
Figma
Storybook MCP

Testing

Unit and end-to-end tests where they pay off, and a self-check of every flow before anyone else sees it.

Playwright
Cypress
Jest
Vitest

Delivery

Pipelines and release flow that make shipping boring, in a good way.

GitHub Actions
Docker
GitLab CI
CodeBuild / CodePipeline
Jenkins

Greetings!I'm Oleh

My Personal Challenges

Project Atlas

Dynamo

Orion

A little about me

Where I've been

Kyiv Polytechnic Institute

Freelance

SoftServe

Watson Title Services

Stella Sun Studio

Beetroot

Wise Water

From idea to production

Planning

From idea to production

What I work with

Frontend

Mobile

Backend

Cloud

Data

Design

Testing

Delivery