5,0 38 reviews

Gordey Fisun — developer

Clients book and buy on their own.

A website, online booking, a Telegram bot, an AI assistant. For clinics, salons, schools, shops and local services — in Ukraine and abroad. I do it myself.

Just write — I'll take it from there. I'll scope your task for free, the decision is always yours. Sites from $400.

Worked with FreightWise SecureData QuickCart PayMaster Shlyakh-Trans Domashniy Zatyshok SmartPromo

what you get

The Clients Come to You Kit.

Not “a website” or “a bot”, but a working system: clients book, write and pay on their own, and you see every lead in your Telegram.

What is included

The right tool for the job

A website, online booking, a bot, a shop, an AI assistant or automation — only what you actually need.

A demo in your brand

I put your logo and your services into a working demo — you look at “yours” before any commitments.

Leads straight to Telegram

Lead → spreadsheet → a message to you. Nothing is retyped by hand.

An AI assistant included

It answers clients in your words and calls you when it doesn't know. The same one runs on this site.

The keys are yours from day one

The code, access, domain and data live on your accounts. You are not tied to me.

What I need from you

One message in your own words. Then I ask questions and show what it could look like.

Not needed: a written spec, a designer, hosting or a domain, understanding the tech.

services

See how it works.

Every card is working code, not a mock-up. Click, drag, type — everything works.

homeuyut · before / after

Reviving old websites

A website from 2015 scares clients away? I’ll bring it back to life.

Drag the divider to see the same page before and after.

See before / after More about site refresh
#redesign#revival

Websites and landing pages

A website that sells for you 24/7.

Éclat Canapé — my delivered project: a furniture-cleaning website, Lausanne and Geneva.

Open Éclat Canapé More about websites
#landing#business-card

Website with online booking

Clients pick a time and book online themselves — in a couple of clicks, at any hour.

A working demo: book a slot yourself.

Try the booking More about online booking
#booking#schedule

Telegram bot

Takes requests while you sleep.

Message the bot as a customer and see what the owner gets at that moment.

Try the bot live More about bots
#bot#requests

Telegram Mini App

A full app right inside Telegram: a shop, booking, client account or tracker — nothing to install.

PULSAR is my own Mini App. Open it in Telegram and see it in action.

Open PULSAR

Cart and one-tap checkout — fill the cart in the demo and see what the owner gets.

Open the cart demo More about Mini Apps
#mini-app#app#booking#tracker

AI assistant

Advises your clients like a human manager.

Such an assistant already works right here — in this site’s chat and in my bot.

Ask the AI More about the AI assistant
#ai#support

Automation

Request → sheet → message to you.

Build your own scenario — then browse a showcase of dozens more.

Build my scenario More about automation
#automation#integrations

approach

What happens after you write to me.

01

A conversation

You write in your own words. I ask questions and show what it could look like.

02

Work in stages

I show intermediate results — you always see which step the project is on.

03

Launch and support

I hand over the code and access, train your team and stay in touch after launch.

comparison

Who you actually work with.

Agency, site builder or one person.

AgencySite builderOne person
Who you talk toa manager who passes it ona support deskthe person who builds it
Who owns itthe agency holds the access, often on its own platformthe site lives while you pay; the data stays on the platformcode, access, domain and data — yours from day one
After launchsupport under a separate contracta support chatI stay around; critical issues within 2 hours
What you need to dobriefs, meetings, sign-offstime to figure it out yourselfone message

guarantees

Four things I answer for.

01

Stop at any stage

If at any stage you are unhappy, we stop and you don't pay for the time spent. The one exception: materials agreed in advance.

02

The price doesn't grow along the way

If the task hasn't changed, the price named at the start doesn't grow. If the task changes, we talk first, then I build.

03

The first 30 days after launch

If a bug shows up in the first 30 days after launch, I fix it myself — that's part of the job.

04

Critical issues — within 2 hours

If a critical failure happens after launch, I respond within 2 hours, even on weekends.

2h responseeven on weekends

about me

Gordey Fisun

I've been building software since 2014. I do it all myself: the conversation, design, code, launch and support — one person.

My clients are owners of clinics, salons, social-media shops, schools and services in Ukraine and abroad. I work remotely, in Ukrainian, English or Russian.

since 2014building software

clientsworldwide

reviews

What clients say.

«Half our receptionist’s day went to phone calls: booking, rescheduling, reminding. Gordey put booking right on the site — a client sees the open slots and picks a time. In the first month 70% of bookings came through without a single call. And people show up more often: they chose the hour themselves.»

Oleh Kravchenko

Boroda barbershop · Kyiv

«Our receptionist used to retype every website request into a spreadsheet by hand, and every tenth patient was lost along the way. Gordey automated it: the request lands in the table by itself and a notification reaches me. Not one has been lost since. Reminders go out without us — fewer empty chairs.»

Yuliia Tkach

Dental clinic · Kharkiv

«Half our students forgot their classes and groups fell apart. Gordey built booking on the site and a bot that reminds them a day and an hour before. No-shows halved, and I no longer message everyone by hand. Best of all, students reschedule themselves and the timetable stays alive.»

Artem Dubyna

Rytm dance school · Vinnytsia

«Requests landed in four places at once: phone, email, messenger and social media — every week something slipped away. Gordey built a bot that takes a request in Telegram, asks a few short questions and sends it straight to me. Nothing is lost now, and half of them arrive at night.»

Ihor Melnyk

AvtoPlus car service · Lviv

«We were losing buyers in the evenings: people asked about sizes and delivery, and we answered the next morning. Gordey set up an AI assistant that replies at once, taking answers from our own product descriptions instead of inventing them. Anything tricky goes to a human. Evening orders are up 30%

Lesia Shulha

Malecha children’s store · Dnipro

«We used to sell inside chats: a customer asks for photos, we send them, then we add it up together. Gordey built a shop right inside Telegram — a Mini App with nothing to install: bouquets on show, a cart that fills up, payment in one tap. More orders, less messaging.»

Sofiia Romaniuk

Flora flower shop · Odesa

«The previous contractor quoted a figure that ate our entire quarterly budget. Gordey broke the task into parts and showed us that half of it could be built from ready-made pieces. We came in 35% cheaper and a month sooner. Not once did a cost appear that we hadn’t been told about in advance.»

Andrii Kovalenko

Kyiv · logistics

«We were heading into an investment round, and I feared one thing — that the developer would vanish in the hottest week. At three in the morning our bank data exchange went down: Gordey answered and had it fixed by dawn. Then he explained why it happened and what to change. With him I stopped checking my phone at night.»

Olena Shevchenko

Lviv · fintech

«I’m a director with no background in programming — I was afraid of being buried in words I don’t know. Gordey took a sheet of paper and drew the path of an order: from cart to courier. Even my commercial director followed it. Now I edit product cards myself instead of pulling in a developer over every little thing.»

Serhii Boiko

Odesa · furniture retail

«We ordered a landing page with animations. Our biggest fear was getting a black box nobody could pick up later. Gordey handed over every file, recorded a video on changing the text ourselves, and walked our managers through it live. A year on we still edit the page ourselves — and haven’t gone back to him once over something small.»

Maryna Honchar

Dnipro · marketing

«We brought Gordey in for a shipment tracking module. Time zones and language worried us, but he showed up for our morning calls and wrote in English so clear that no questions were left. He proposed a different approach right away, and running the servers came out 40% cheaper than we had budgeted. We still work together.»

John Miller

New York, USA · logistics

«Our clients are banks, so we were exacting about the security review. Gordey found 12 ways someone could reach our data and closed them without the service stopping for a minute. What matters more: he didn’t patch the holes, he removed the reason they kept appearing. Client audits are calm for us now.»

Hans Wagner

Berlin, Germany · cybersecurity

«A task our own department priced at 3 months, Gordey closed in 1.5. No magic: he split the work into stages and we signed off on pieces instead of waiting for the end. Every day, a short note: what’s done, what’s next. When deadlines are burning, that is what saves you — you always know where you stand.»

Krzysztof Nowak

Warsaw, Poland · e-commerce

«We were building a large store. Gordey asked about the business before the technology: he left room for growth from day one, so we would not be rewriting it a year later. Pages used to take 800 milliseconds to open — now 120, and purchases are up 18%

Bohdan Tkachenko

Head of MarketHub platform · Kyiv

«We’re a financial institution, and it is our own clients who put us through security reviews. Gordey got us ready: he walked through every data exchange step by step, brought it up to banking requirements and left the team a short list of rules. We passed the last review without a single finding — for the first time in three years.»

Iryna Lysenko

Head of Security, Capital Trust financial group · Kyiv

«When we launched we needed a partner who understood speed, not just a contractor. In 3 weeks Gordey put together our first working version — not a mock-up, but something our first customers were already using. It held up without failures, and that is what we showed investors. For a young team that is half the battle.»

Dmytro Petrenko

Co-founder, AutoDoc startup · Dnipro

«We had an old project written 10 years ago that nobody wanted to touch. Gordey updated it piece by piece and the business never stopped for a day. He left behind clear, documented code that our junior team now maintains on its own. A product we had all but buried is earning again.»

Oksana Bondar

Head of Product, SoftLine · Kharkiv

«Our supplier let us down two weeks before launch. Gordey stepped in when everyone else just shrugged, and delivered in 3 weeks what we had budgeted 2 months for. Our testers didn’t find a single serious bug. We launched on the exact day — our customers never knew anything had gone wrong.»

Pavlo Zhukov

Operations Director, TransExpress logistics · Odesa

«We needed to bring together customer records, payments, delivery and analytics — five separate services that couldn’t see each other. Gordey didn’t just connect them: he built a single point where a new service plugs in within hours. We have added two more since, and never had to call a developer.»

Viktoriia Savchenko

Operations Director, LeadGen marketing agency · Kyiv

«We brought Gordey in not to write code but to teach our junior team. He ran 10 sessions: how to keep code tidy, how not to lose each other’s work, how to check changes before a client ever sees them. Bugs in releases dropped threefold, and people stopped being afraid to touch someone else’s work.»

Roman Lytvynenko

Team Lead, Smart Solutions IT department · Zaporizhzhia

«Our site went down right before Black Friday — the worst possible day. Gordey stepped in and found the cause in 4 hours: the store was choking on database queries. He rewrote the heaviest parts on the spot. We didn’t lose a single order on the day we had worked toward all year.»

Anna Doroshenko

Director of TechZone online store · Kharkiv

«We were moving from an old system to a new one and feared stopping shipments even for a day. Gordey planned the move so the system changed in pieces while work carried on. He documented and tested each piece separately. Six months on, we have a system that handles peak days without us stepping in.»

Taras Lozovyi

CTO, TransGlobal logistics group · Odesa

«We had an idea but nobody to translate it into technical terms. Gordey helped us choose where to start and built a first version in 2 weeks. It ran reliably — and that convinced investors more than any pitch deck. We got our funding and still run on the same foundation.»

Yevhen Moroz

Co-founder, HealthMonitor startup · Lviv

«We were moving the business off an old platform, and our biggest fear was losing customer data. Gordey checked everything we had accumulated first, and only then moved it. 500 thousand records made the trip without a single loss, in 5 days instead of the month we expected. Checkout and stock now respond three times faster.»

Mariia Petrova

Head of Operations, FamilyMart retail chain · Dnipro

«We ordered a food delivery app that had to work on iPhones and Android alike. Gordey built both versions from one base, so they update together and never drift apart. In the first two weeks: 2000 downloads and a 4.8 rating. Orders now come in on their own, with no calls to operators.»

Oleksii Hrytsenko

Founder, FreshEats delivery · Kyiv

«Our home page took 6 seconds to load — people left before it appeared. Gordey worked out exactly what was slowing it down, compressed the images and removed needless database calls. Now it is 1,2 seconds. The site climbed 15 positions in search and brings in 12% more enquiries — all without any advertising.»

Ivan Horobets

Search marketing, WebMaster agency · Vinnytsia

«We work with hundreds of suppliers, and every order used to be typed into spreadsheets by hand. Gordey connected our old accounting system to a simple window in the browser: orders, payments and reports now assemble themselves. That freed up 20 hours a week. Training took one day — after that everyone managed on their own.»

Nataliia Kryvoruchko

Finance Director, PromGroup manufacturing · Chernivtsi

«Before a big launch we asked Gordey to look at the project with fresh eyes. He found 17 places that could have blown up under load, and explained each one so clearly that our own team fixed them. The launch went off without a hitch. This is the case where the best work is the work nobody noticed.»

Denys Romanenko

Project Manager, DevCore · Sumy

«We needed a complex application for a healthcare service where patient data is protected by law. Gordey built it so that each person sees exactly what they are allowed to see and nothing more. The most valuable part: he turned our vague wishes into a clear plan. He delivered ahead of schedule, and the system has run for 8 months without a single failure.»

Dr. Sarah Thompson

CTO, MediTrack health startup · Boston, USA

«Our platform had to connect to dozens of banks across Europe — each with its own rules, formats and requirements. Gordey built one shared layer, and now we add a new bank in days rather than months. Running costs fell by 30%. The complexity stayed with him; what we got was a simple button.»

James Whitfield

Head of Engineering, LendWise fintech · London, UK

«At peak hours the store barely breathed — exactly when people are ready to buy. Gordey rebuilt what was underneath so heavy pages are prepared in advance. Load time dropped from 4,5 seconds to 0,8. Sales rose 22% in the first month. It turned out we were losing buyers on waiting alone.»

David Chen

Founder, ShopNorth online store · Toronto, Canada

«We needed one app that works equally well on iPhone and Android. That is exactly what Gordey delivered: smooth animations, nothing lagging, no visible difference between the platforms. In the first three weeks: 15 thousand downloads and a 4,9 rating. Students stopped writing to us about freezes — and that is the best review there is.»

Emma Williams

CEO, LearnSmart education startup · Sydney, Australia

«Our cloud setup was a mess: high spend, no visibility, and only the previous contractor knew what was inside. Gordey put it in order and made everything build from a description instead of by hand. Running the cloud got 45% cheaper, and now we see every failure before our customers do.»

Mark van der Meer

CTO, ShipEase logistics platform · Amsterdam, Netherlands

«We sell data protection, so we have to be flawless ourselves. Gordey tested our product the way an attacker would and showed us 14 ways to reach someone else’s data. More valuable than the list, though, was the playbook he left our developers: they now spot such mistakes themselves, before they write them.»

Erik Lindström

Head of Security, DataShield · Stockholm, Sweden

«We wanted the store itself to suggest what would genuinely suit a customer. Gordey built that and taught our team to run it — it will not stop working without him. Those recommendations now bring in 18% of our turnover. Smart suggestions, it turns out, sell better than any mailing.»

Isabelle Dubois

CEO, Maison Élégance luxury retail · Paris, France

«We had a product idea and no technical co-founder. Gordey built the first version in 5 weeks and showed us how to explain the technical side to investors in plain language. It looked so finished that three large clients signed up before the official launch.»

Noam Cohen

Co-founder, SecureGate cybersecurity startup · Tel Aviv, Israel

«A private bank cannot afford “almost works”. Gordey built our team a single dashboard where the market and client portfolios are visible live, with no delay and no extra clicks. He passed every one of our internal reviews calmly — and ours are the longest part of anything we commission. Not one finding in a year.»

Thomas Müller

Head of IT, Helvetic Trust private bank · Zurich, Switzerland

«We take readings from thousands of sensors across our network, and half that data used to go nowhere. Gordey built a system that takes the whole stream without choking. Now we can see equipment about to fail 3 days in advance — and repair it calmly instead of in the middle of the night.»

Lars Olsen

CTO, Nordic Power energy company · Oslo, Norway

01/ 38

own projects

I build for myself too.

OMNI

a live product in the browser

A personal knowledge system: documents, boards, a connection graph, databases and cards — in one app. Architecture, code, backend and design — all mine.

Complex architecture TypeScript, hundreds of modules and 800+ automated tests
Data under protection atomic writes, version history and cross-device sync
AI connects directly a custom MCP server: Claude or ChatGPT work with your knowledge base
Works offline the app opens without internet — your data is always at hand

TypeScript · React · Cloudflare edge · custom MCP server · PWA

Architecture, code, backend and design here are one person, and the product opens in a browser right now. I build systems like this to order — from architecture to launch.

PULSAR 14 days in a row
18:42 focus
a quarter in cells

PULSAR

a live product in Telegram

A habit, focus and productivity tracker on a starry sky. One tap — and the day is logged. The picture of your week and year builds itself.

One person — all roles idea, design, code, backend and product philosophy — all done by me
Full stack solo frontend, backend, cross-device sync and a bot with smart reminders
PULSAR — the tracker grid: skills, time, mood, sleep, journal, goals, finances, workoutsPULSAR — a focus session: the timer ring with the Pause and Finish buttons

screens from the working app

Telegram · Cloudflare · custom sync · monetization via Stars

The Mini App, the bot and cross-device sync here are not descriptions — they open from Telegram right now. I build the same to order.

questions

Common questions.

Write it as it is, in your own words. I will ask questions, break the task into steps and show what it could look like — before any commitments. No obligation.

You do. The code, access, domain and data are yours from day one. You are not tied to me: any developer can carry the work on.

I show the work stage by stage and collect your feedback at every step, so there are no surprises at the end. If you are unhappy at any stage, we stop — and you don't pay for the time spent.

Yes, and that is the most common path: a website or a bot first, then online booking, an AI assistant, automation. I build so that the next step never means starting over.

Yes. All communication happens in messengers and on calls, so location does not matter. My clients include companies from Ukraine, Switzerland, the USA, Germany and Poland.

Because I work alone and run a few projects at a time: each one gets my full attention, not a tenth of it. The threshold is an honest line below which I can't stand behind the result the way my guarantees promise. There is no upper limit — the task can be any size.

Write to me — I take it from there.

In your own words, even if the idea isn't fully formed yet. I'll reply personally, ask a few questions and show what it could look like.

Still hesitating? Try the live demos — they’re real and they work right here.

Message on Telegram

I reply personally — me, not a bot. Your contact stays with me.

5,038 reviews