I build software

Fifteen years ago, at the beginning of my software engineering journey, I wish I had a mentor. Someone senior — a CTO, a founder, anyone who'd been through it — to sit down with me for half an hour and explain how it all actually works. Not the syntax. The thinking. Patterns. Reality. I learned by Googling. The skill back then was asking the right query, finding the right article someone wrote sharing their knowledge. Later YouTube tutorials appeared. But mostly

A shared vacation calendar in Google Workspace is one of those problems that every company has and that is surprisingly still not solved out of the box. You'd think Google would have a native "team vacations" view — they don't. Important to know: Google Calendar has a dedicated "Out of Office" event type — selectable in the event type tabs — that auto-declines meetings and shows your status across Workspace. Most people never use it because they just create a regular

The era when devices are controlled just by thought is almost here. Until then, chat 💬 beats menus and forms as the way to interact with systems — and each other. I recently embedded an AI agent into Jinna, a free invoicing tool. By the way you can log in and create beautiful✨ invoices there, for free! It feels like magic: Ask an AI agent for an invoice, and it creates one. Understands complex requests. Resolves ambiguity. Performs

For the past five years, Cloudflare has been my default infrastructure choice for nearly everything I build. I might be biased, but I genuinely believe Cloudflare gives you the most flexible, robust, easy-to-build, low-maintenance infrastructure — for FREE, until you finally make it. When DataUnlocker suddenly had to handle 50 million proxy requests per day after a major customer onboarded, I wasn't scrambling. No emergency scaling

I love Google. I worked at Google. It was my childhood dream to work there, and I made it happen. So what I'm about to tell you isn't coming from a place of hate — it's coming from a place of genuine disappointment. Google deleted 10 years of my location history. Not intentionally, but that doesn't make it any better. The Beginning: 2015 It all started back in 2015 when \[Google introduced Location History]\(https://maps.googleblog.com/2015/07/your-timeline-revi

I was invited by my friends to speak at AI Просмажка — a panel discussion organized by the VUS (Великий Український Стартовер) community in Warsaw. The format was a "roast" of AI: four speakers with different backgrounds critically examining the hottest topics around artificial intelligence, followed by networking at the bar. The event sold out, which was a nice surprise for a niche topic in a city where the Ukrainian tech commu

For almost two years I organized bi-weekly table games in Krakow. The first game was announced on January 14, 2024, and the last one was held on August 3, 2025. In total, we played around 40 sessions with an average of 15–20 people attending. At peak times, we had close to 30 people gathering in one place. The Format The workflow was straightforward: we'd gather at 4pm, start with 1–2 hours of a warmup game that works well with large groups - usually Codenames projected on the big screen.

After more than two years of steady work — with many twists, lessons, and iterations — I’m happy to share that DataUnlocker 2.0 is now live! What is DataUnlocker? In simple terms, DataUnlocker helps websites recover visibility into the user actions that are often lost due to ad blockers and privacy tools. Today, many businesses rely on tools like Google Analytics or Facebook Pixel to understand what users are doing on their site, track revenue, or measure conversions from their market

I was invited by Charles Cormier to appear on the Founder Wisdom podcast, where we had a deep conversation about my journey as a technical founder, bootstrapping DataUnlocker, and my perspectives on the crypto industry. What We Discussed The conversation covered quite a few topics: DataUnlocker and the Analytics Problem. I explained how websites lose 20–50% of their user data because ad blockers categorize analytics scripts as

Kosovo is one of the "youngest" countries in Europe, having declared its independence in 2008 (fact: Ukraine has not recognized Kosovo's independence). Its capital, Pristina, is known for its vibrant street life and unique blend of cultures. I was especially impressed to see a very big Ukrainian flag displayed on the central square, a symbol of solidarity that stood out during my visit. The main reason for my tr

The Estonian e-Residency card enables creating a remote digital business with significant advantages. Think of it like a gym membership in another city - full access to business infrastructure remotely, but no key to sleep in the building. How to Get Started The process is straightforward: Apply online - fill out the application form Pay the state fee (~100-120 EUR) Wait for approval (~3-4 we

On October 30, 2024, I defended my PhD work at the Institute for Information Recording of the National Academy of Sciences of Ukraine. This milestone marked the culmination of years of research and dedication to the field of Information Technology, specifically within Computer Science. My thesis, titled "A Method of Decentralizing Knowledge Bases for Decision Support Systems", explored innovative ways to ease blockchain applications adoption and in particular bring decentralization to knowledg

Romania - home to Dracula's legend, the famous Transfăgărășan highway, and some of Europe's most underrated natural beauty. With a population of around 19 million, Romania offers a fascinating mix of medieval history, Carpathian wilderness, and a surprisingly affordable travel experience. Fun fact: Romania has one of Europe's largest populations of brown bears - around 6,000 of them roa

I joined Cyber.fund as a Product Owner to help bootstrap Y App (Y Nation) - a next-generation decentralized identity (DID), wallet, and DeFi application. Working in a small team of founders (CEO, PM, CTO, Designer), I was responsible for: Assembling product requirements and user stories Designing user flows and conducting UX research Benchmarking competitors and conducting market research Shaping the product vision for the decentralized identity space The projec

I've organized events before - back in student years I ran Google Hash Code gatherings for around 100 people. But this was different. This was my first rave, and I was the one behind the decks. Well, behind the iPad. The idea had been brewing for a while: find the most isolated spot possible near Krakow, set up proper sound equipment, and throw an outdoor party for 50+ friends. No noise complaints, no distractions, just us and the music under the night sky. What Made It Special The locati

So I decided to get a deep understanding of a few things: How markets work (all 3: Crypto, Forex and Indexes) How traders live and whether the life of a trader is indeed a breeze How to perform analysis of markets and what to watch for Success and failure stories Merciless market rules I've got all the answers by passing the most fully-packed "Supercharged" course by Cryptology - an awesome Ukrainian growing crypto community. Trading is definitely not

A spontaneous winter escape to Morocco! When I found $100 round-trip flights from Katowice, Poland, it was impossible to say no. Morocco has a population of around 37 million and sits at the crossroads of Africa and Europe, with a rich blend of Arab, Berber, and French influences. Fun fact: Morocco is one of the few places in the world where you can see goats climbing argan trees to eat their fruit - and yes, that was the main highlight of my trip!

In early 2023, I joined Cirrina as Head of Technology to help build a Web3 superapp designed to simplify personal crypto finance management for everyday users. The Vision Cirrina set out to solve a fundamental problem: Web3 was built by geeks for geeks, making it too complicated for average users to manage assets across multiple wallets and services, understand transactions, and file taxes compliantly. Our vision was a beginner-friendly superapp that makes it

A weekend trip to Germany to visit our relatives who had become Ukrainian refugees after the 2022 invasion. Germany, my 62nd country, took on a different meaning this time - less tourism, more family. Germany has taken in over a million Ukrainian refugees since February 2022, the largest such effort since World War II. With 84 million people, it's Europe's most populous country and its economic engine. But seeing it through the eyes of displaced family

The Maldives became my 61st country, and what a way to end 2022. Three weeks across Christmas and New Year in what's probably the most photogenic destination on Earth. Also the first long overseas trip where I didn't bring my drone - the resorts have strict no-fly policies, so I finally just relaxed without worrying about aerial shots. The Maldives is a country of superlatives: the lowest-lying nation on Earth (average elevation 1.5 meters), spread acr

It was a great pleasure to be invited to talk at the University of Surrey, UK. It was a 1.5-hour talk with Q\&A for graduating students in crypto. Unfortunately the presentation itself wasn't recorded properly and was lost permanently :/ But what wasn't lost is the Q\&A session at the end, which is linked down below :) The topic of my presentation was: What is it like to be a crypto company? I talked through past experiences in multiple crypto companies I worked at, their successes and fail

As a CTO at DeCash, I'm glad to announce we have a release of our own stablecoin and the UI to manage it, send.decash.com. The technical part of it was polished really well and, compared to other stablecoins, offers: Paying fees in the transaction currency. No more "Ether" or any other currency needed except DeCash tokens to manage them. Lowest possible fees, just $0.01 per blockchain action. Quick finality

Sri Lanka became my 51st country, and I visited during one of the most dramatic moments in its recent history. The 2022 economic crisis was in full swing - the currency had lost 40% of its value, power cuts lasted 8 hours a day, and protests that would eventually topple the government were gathering momentum. Not your typical tourist timing. Sri Lanka is a teardrop-shaped is

This is a day when Russia decided to invade my home, Ukraine. Missile strikes all over Ukraine, in all cities, Russian troops are attacking all across Eastern Ukrainian land border. Russia not being happy with the presence of independent Ukraine is a long story. But long story short, from my point of view, last 2-3 years before the war, with our new president Zelensky were amazing years for Ukraine. At the time of invasion, just 2-3 years after Zelensky stepped in: We've got an absolutely a

Peru became my 47th country, and two weeks there confirmed what I'd always suspected: it's one of South America's absolute highlights. The Inca heritage, the Andes, the Amazon, the food - Peru packs an incredible diversity into one country. Peru has 33 million people and one of the most varied geographies on Earth. The coastal desert, the Andean highlands, and the Amazon rainforest create completely different worlds within the same borders. It's also one o

Argentina became my 45th country, and after a week exploring, I can confidently say it was my favorite of all the South American countries I visited on this trip. Buenos Aires alone would have been worth the journey. Argentina is a country of extremes: the 8th largest nation by territory, with 46 million people spread from subtropical north to glacial Patagonia. I

Brazil became my 43rd country - and the starting point for an extended South American journey. My friends and I, all working remotely in IT, decided to spend several months exploring the continent while continuing to work. Two weeks in Brazil was just the beginning. Brazil is a country of superlatives. The 5th largest nation by both territory and population (215 million people), it dominates South America geographically and economically. It contains most

My successful side project DataUnlocker now has 400 users worldwide! 🎉 This project constantly grows, getting new users without spending a penny on marketing. My strategy now is still to validate that the ad blocking community is helpless against what DataUnlocker offers, and prove that it's reliable long-term before scaling this product. Even now, we have many happy companies proxying their analytics data.

Moldova became my 41st country, a short drive from Ukraine where I was visiting family at the time. It's one of Europe's least-visited nations, and that obscurity is part of its charm. Moldova is Europe's poorest country by GDP per capita, a small landlocked nation of 2.6 million people squeezed between Romania and Ukraine. It was part of the Soviet Union until 1991, and the Russian influence remains visible. The breakaway region of \[Transnistria]\(https

In the past year at Google I've been working on one of the most anticipated Google Cloud products - the carbon footprint. Specifically, I've been leading its UI development. As you can imagine, this product was not only about the UI: we had a team at Google of around 40 amazing people working together to make Carbon Footprint live and announced on October 12. \_«It allows companies to measure, track and report on the gross carbon emissions associated with the electricity of your cloud usage,

It all began a year ago, when a small crypto company DeCash reached out to me with questions in regards to my open-sourced solution - delegated transactions for Ethereum. Since then, I started to do consulting for this company in my free time. Now I am pleased to announce that I am leading a few powerful technical products with multiple teams at DeCash to bring them to a mass market. I truly believe that the techn

Albania became my 40th country - a milestone that marked the beginning of a Balkans road trip. After decades of isolation under communist rule, Albania has emerged as one of Europe's most surprising destinations. Albania spent most of the Cold War as the most isolated country in Europe, under the paranoid dictatorship of Enver Hoxha. He built over 170,000 bunkers across the country, preparing for invasions th

Bosnia and Herzegovina became my 39th country, a brief stop on the Balkans road trip. Even a short visit reveals layers of history - Ottoman, Austro-Hungarian, Yugoslav, and the scars of the 1990s war. Bosnia is a country of 3.3 million people with one of the world's most complicated political systems - a federation within a federation, with three presidents representing three ethnic groups. The \[1992-1995 war]\(https://en.wikipedia.org/wi

Montenegro became my 38th country, and I spent over a week exploring this tiny Adriatic gem. With dramatic mountains plunging into the sea, medieval walled towns, and prices still reasonable by Mediterranean standards, it's easy to see why Montenegro is on the rise. Montenegro is the smallest of the former Yugoslav republics (just 620,000 people) and one of Europe's newest nations, having declared independence from Serbia in 2006. The name means "Bla

Two weeks in Cyprus during May 2021 - a perfect Mediterranean escape! With a population of around 1.2 million, Cyprus is the third-largest island in the Mediterranean and offers a fascinating blend of Greek and Turkish cultures. Fun fact: Cyprus has the highest concentration of bars per capita in the world, and Aphrodite, the goddess of love, was said to have be

DataUnlocker is my first software-as-a-service project which turned to have a big demand and is now serving hundreds of customers worldwide! This is to record the date of its public launch. After 6 months of hard work on my DataUnlocker project and the successful closed beta testing, I made it available for everyone (in beta), just before the New Year! :) This was an intentional "soft launch", as no one will use it during the new year and

A collection of photos and videos from my home country - Ukraine. With a population of around 40 million and a territory larger than any country entirely within Europe, Ukraine is a land of vast plains, historic cities, and resilient people. Fun fact: Kyiv is one of the oldest cities in Eastern Europe, founded around 482 AD. The city's golden-domed churches and chestnut-lined boulevards have witnessed over 1,500 years of history. My Ukraine These imag

DataUnlocker is my first project which turned to have a big demand and is now serving hundreds of customers worldwide! This is to record the date of its closed beta launch to over 100 customers worldwide. You can read the beginning of the story in the previous timeline record. After 5 months of hard work on my DataUnlocker project, I made a fully-featured and usable solution to start going wild. As it should be in the world of software, o

As an active open source contributor, I couldn't miss this event in 2020 either. Hacktoberfest is a "month-long celebration of open source software", organized by Digital Ocean in partnership with GitHub. The idea of this celebration is simple — you need to create 4 pull requests to any GitHub open source repositories to win a limited edition T-shirt and a couple of stickers. They do deliver world

DataUnlocker is my first project that turned out to have significant demand and is now serving hundreds of customers worldwide! This timeline record tells a short story about how it all started. Back in 2017, on April 28, I published a technical article about "saving" website analytics from ad blockers. To understand what it is about, imagine you are a website or web applica

Working at Google was my childhood dream, and today I am happy to be joining it at the very beginning of 2020 as a Software Engineer. New decade, new adventures! I always wanted to realize how such big companies work from the inside out, and now in my 24, I can tell that this is the last wanted piece added from my knowledge. When all the pieces match together we'll make something exciting! At least for a year, I will be based in Warsaw, Poland. My very first project at Google is Google cloud a

Two weeks exploring continental Spain! With a population of around 47 million, Spain offers an incredible mix of history, culture, and natural beauty. This trip focused on the mainland, saving the islands for another adventure. Fun fact: Spain has the second-highest number of bars per capita in the world (after Cyprus), and the tradition of tapas originated in Andalusia. What I Experienced Barcelona was a ma

As an active open source contributor, I couldn't miss this event in 2019 either. Hacktoberfest is a "month-long celebration of open source software", organized by Digital Ocean in partnership with GitHub. The idea of this celebration is simple — you need to create 4 pull requests to any GitHub open source repositories to win a limited edition T-shirt and a couple of stickers. They do deliver world

Meeting new people, this time in Muscat, Oman! It is a great pleasure to be welcomed by Sultan Qaboos University Hospital, the university which works with InterSystems technologies. I provided a one-week training for them, which included InterSystems technologies and a basic web course. As always, I spent a bit more time in Oman for traveling and doing creative things!

A week in Oman, combining a teaching assignment with exploration of this fascinating Arabian Peninsula nation. With a population of around 5 million, Oman stands out as one of the most welcoming and well-organized countries in the Middle East. Fun fact: Oman was the first Arab country to have a fully trained female police force and has consistently been ranked as one of the safest countries in the world.

Two weeks in Indonesia exploring Bali, Java, and the surrounding islands! With a population of over 270 million spread across more than 17,000 islands, Indonesia is a world unto itself. This was an adventure-packed trip that exceeded all expectations. Fun fact: Indonesia spans three time zones and is so vast that the distance from one end to the other is roughly the same as from London to Baghdad! What I Experience

A long layover in Doha gave me a chance to explore Qatar briefly. What started as a fueling stop in the desert has transformed into one of the world's most ambitious modern cities. Qatar has just 2.9 million people, though only about 300,000 are Qatari citizens - the rest are expatriate workers. It has the world's third-largest natural gas reserves, which funds everything you see. Fun fact: Qatar has the highest GDP p

This year I've made a great solution for the very common blockchain problem. I am open-sourcing this solution and will be speaking about it at BlockchainUA - the biggest blockchain and crypto-related conference in Ukraine. I've been invited to speak on the tech stage, which was the main stage at the conference. See you there! Links \[My Presentation]\(https://docs.google.com/presentation/d/1BeAcIyH9IW

Poland became a significant part of my life when I moved here for work at Google in 2020. With a population of around 38 million, Poland is Central Europe's largest country and has become a major tech hub in recent years. Fun fact: Poland has 17 UNESCO World Heritage Sites, and its Old Towns in Kraków and Warsaw are among the most beautifully restored in Europe. What

This was the third time I came to Dubai as a teacher, to the InterSystems office to conduct training for Dubai healthcare organizations. I do share a lot of photos/videos from my trips, you can check them on my Instagram.

A whirlwind trip to Cape Town combined with an ETHCapeTown hackathon! With a population of nearly 60 million, South Africa is a country of extraordinary diversity - in landscapes, cultures, and wildlife. Fun fact: South Africa has three capital cities - Pretoria (administrative), Cape Town (legislative), and Bloemfontein (judicial). What I Experienced Cape Tow

EthCapeTown is a global hackathon organized by ETHGlobal and dedicated to Ethereum blockchain. I came up with an interesting idea which our team could implement in terms of the global Ethereum hackathon. The service which we were aiming to build allows anyone to benefit, as well as DreamTeam, who is sponsoring our participation in the world's biggest blockchain hackathon. \*\*\[And we've mad

Two weeks exploring the Land of Smiles! Thailand With a population of around 70 million, Thailand is Southeast Asia's most visited country - and for good reason. This trip was my first taste of Thai hospitality, culture, and cuisine. Fun fact: Thailand is the only Southeast Asian country that was never colonized by a European power - "Thai" literally means "free." What I Experienced Bangkok hits you with se

Spending Christmas and New Year's Eve in Greece was a wonderful way to end 2018! With a population of around 10 million, Greece is the cradle of Western civilization - every corner seems to whisper stories of ancient history. Fun fact: Greece has more archaeological museums than any other country in the world, and the Parthenon has been standing for nearly 2,500 years. What I Experienced Visiting during the

I was invited to Dev Challenge 13 to share our experience implementing blockchain solutions. Many thanks to everyone involved in this event! I appreciate everything: from the organization to the audience that listened and asked so many great questions. It has been almost a year since I joined DreamTeam, a young startup building the future of esports. I've developed an Ethereum-based decentralized solution there from scratch. We've gained a lot of

As an active open source contributor, I couldn't miss this event in 2018 either. Hacktoberfest is a "month-long celebration of open source software", organized by Digital Ocean in partnership with GitHub. The idea of this celebration is simple — you need to create 4 pull requests to any GitHub open source repositories to win a limited edition T-shirt and a couple of stickers. They do deliver world

It was a pleasure to be invited by InterSystems to conduct a series of courses on databases and web technologies. In Dubai, United Arab Emirates, InterSystems has quite a lot of customers who use their technology. That summer, they were about to add a couple of new hospitals and clinics to their list, and these people needed training. For me personally, this was an exciting opportunity to meet new people, get familiar with the culture, and see the city! Dubai was

The date of my graduation! It has been quite a long time since I started university, created more than 100 pet projects, got my first job, and completed several significant side projects. Six years of education are behind me. Five years of professional part-time experience, with over eight years in IT total, are behind me as well. Today is the day to reach new heights and continue to keep an open mind, as always. I did my best to get my master's diploma with honors. Now, it's time to brin

This year, as well as the previous year, I organized a hub for Google Hash Code 2018. We've got a competition with around 18 teams from our hub, including my own team! I and my friends prepared co-working space Belka for the event; this year we've got some great goodies from Google. Many thanks to Google, everybody who helped me with organization and all the peop

I always follow trends in technology. Blockchain was one of the things I had been interested in for over a year, until I finally turned my career toward blockchain development and R\&D thanks to DreamTeam. DreamTeam is a young startup where I have a key role now: I develop blockchain (Ethereum) solutions. The main reason why I decided to go this way is that this role combines everything I love and much more: blockchain, research and development, great atmosphere, great

My multi-browser extension that keeps browser tabs sorted in most recently used order (MRU), from left to right, just like the list of apps on desktop OSes when holding Alt+Tab. Tab Slider brings this behavior to the Chrome browser for your convenience. Try it! How it works: If you stay on a tab for more than 1 second (default), it will "slide" to the leftmost position; In this way, most recently used tabs always stay ordered from left to right; Because of this order, when switching tab

I learned a lot about blockchain and cryptocurrencies in the second half of the year and wanted to share my knowledge with others. I had a great opportunity to do this at Kyiv's Blockchain School, which was hosted at our Student's Space Belka. I organized a micro-lecture alongside other sessions to share blockchain technology basics with 100+ students! This helped them understand the core concepts required to continue practicing

As an active open source contributor I couldn't miss this event. Hacktoberfest is a "month-long celebration of open source software", organized by Digital Ocean in partnership with GitHub. The idea of this celebration is simple — you need to create 4 pull requests to any GitHub open source repositories to win a limited edition T-shirt and a couple of stickers. They do deliver worldwide, and the pr