I build custom systems that cut manual work and lost revenue for service businesses. Booking, automation and AI, written in code you own.
I build custom systems for service businesses. Booking and scheduling, operations automation, and AI put inside processes that already run.
Every project starts with what the business is losing today, not with a feature list.
Five systems for salons, clinics, sports venues and installation services. The problem is never the calendar.
Work that repeats every day becomes a system nobody on the team has to think about again.
Document extraction, support automation, anomaly detection on live data. Not a chatbot on a homepage.
No platform fee that grows with your customer list. No ceiling you find out about in month eight.
Stripe, Mercado Pago and PayPal wired into billing that runs without anyone watching it.
I build custom systems for service businesses. Booking and scheduling, operations automation, and AI put inside processes that already run. Every project starts with what the business is losing today, not with a feature list.
Delivered across healthcare, retail, sports, education and fintech, always as code the client owns.
Five systems for salons, clinics, sports venues and installation services. The problem is never the calendar.
Work that repeats every day becomes a system nobody on the team has to think about again.
Document extraction, support automation, anomaly detection on live data. Not a chatbot on a homepage.
No platform fee that grows with your customer list. No ceiling you find out about in month eight.
Stripe, Mercado Pago and PayPal wired into billing that runs without anyone watching it.
The tools behind the work. What matters to a client is that none of it locks them into a platform they cannot leave.
All technologies at a glance
Kyiv, Ukraine
Remote
Every one of these started as a business losing time or money somewhere specific. The technology was the answer, not the point.
Most first-pass editing is mechanical work billed by the hour. The platform handles that pass, so editors only touch what needs judgment.
A pet store chain could not see stock across its branches, so every location over-ordered. The POS keeps selling when the connection drops.
Finding a medicine in stock meant calling pharmacies one at a time. Availability and location across Montenegro are now a single search.
Teachers were spending more time on attendance sheets and grade spreadsheets than on teaching. The admin work now happens where the class is.
Traders leave when the price moves between the click and the fill. Sub-second execution on Solana keeps the order book worth using.
Most students quit in the first week because nothing points them at the right next lesson. The path adjusts to what each one actually finished.
Water system failures were found after the damage, through paper reports. Anomalies now surface from live data while they are still cheap to fix.
A cancelled court is inventory that expires. The freed slot goes to the waiting list before anyone notices, and WhatsApp answers itself.
No-shows are the quiet cost of every appointment business. Reminders reach clients on WhatsApp, and a cancelled slot gets offered again.
A strategy only earns if it runs the same way every time, including at 3am and during bad news. The bot holds the rules and the risk limits.
Stablecoins, tokens and exchanges. Money moves through these systems, so the security model gets decided before the first line of code.
Polygon PoS + Chainlink
A stablecoin is only trusted if anyone can check the reserves at any moment. Chainlink Functions verifies them in real time.
Multiple Clients
Tokens carrying real value need clear permissions and a stop button before launch, not after the first incident.
SPL Token Exchange
Traders abandon an exchange that lags. Sub-second execution is what keeps volume on the book.
Polygon PoS + Chainlink
A stablecoin is only trusted if anyone can check the reserves at any moment. Chainlink Functions verifies them in real time.
Multiple Clients
Tokens carrying real value need clear permissions and a stop button before launch, not after the first incident.
SPL Token Exchange
Traders abandon an exchange that lags. Sub-second execution is what keeps volume on the book.
AI put inside operations that already run. Document extraction, support automation, anomaly detection on live data.
Editing passes and course recommendations that used to require a person reading every line.
Clients send voice notes on WhatsApp. The booking gets made without staff listening to any of them.
Pipelines that let a system answer from the company documents it was given, instead of guessing.
Voice messages turned into text the system can act on, so support stops being a listening job.
Image generation built into tools clients use directly, without a designer in the loop for every asset.
AI belongs where the work already happens, not bolted on at the end. I decide that on day one, with the client, before anything is built.
Editing passes and course recommendations that used to require a person reading every line.
Clients send voice notes on WhatsApp. The booking gets made without staff listening to any of them.
Pipelines that let a system answer from the company documents it was given, instead of guessing.
Voice messages turned into text the system can act on, so support stops being a listening job.
Image generation built into tools clients use directly, without a designer in the loop for every asset.
AI belongs where the work already happens, not bolted on at the end. I decide that on day one, with the client, before anything is built.
MetaTrader 5 · Python Automation
A strategy only earns if it runs the same way every time, including at 3am and during bad news. The bot holds the rules and the risk limits so the decision never depends on how the day is going. Separate buy and sell engines keep the logic clean and the performance of each one visible.
Interface preview with sample values. Real figures depend on the strategy, the instrument and the account.
Reviews left by the people who paid for the work. Nothing here was written by me.
Ustym is a top-tier professional. He is highly reliable, communicates effectively, and delivers high-quality work consistently on time. He is proactive, he does not just execute tasks but thinks ahead to provide the best solutions for the business. A true partner you can trust with your vision.
He is not just a developer, but a high-level technical partner able to engineer complex ESG and fintech solutions from scratch. He turned sophisticated industrial logic into a fluid digital platform. He bridges the gap between complex business requirements and clean, functional code.
Every stage was delivered with precision and care, inside deadlines I did not think were possible. His dedication cut my waiting time by 99%, which saved me money and let me go live far sooner, starting to profit almost immediately.
He made Agendux the complete SaaS appointment booking platform I envisioned, fully functional, stable and production-ready. What impressed me most was his ability to solve complex technical challenges. He was always responsive and transparent, and he far exceeded the original scope.
From the first contact he was extremely helpful, patient and professional. What I liked most was his commitment to delivering work that is genuinely well done. The result was exactly as I imagined it, and the whole process was calmer thanks to his dedication.
He quickly understood the existing system, validated the lesson logic, and improved the interaction flow with a clear, structured approach. He designed a clean, database-friendly content structure that makes future imports straightforward. Well executed and delivered on time.
Ustym is a very talented freelancer. He finished the project accurately and with surprising speed. I want to work with him again if I get the chance.
Reliable, honest and fast developer. He gave solutions that were coherent with the project. Thank you.
Very competent, dedicated and committed to delivery. He showed technical command, organisation and good communication throughout. The work went beyond expectations while always respecting the resources I had available.
He delivered ahead of schedule, with perfect technical results and a clear understanding of the requirements. The final result was accurate, clean and fully functional, showing great attention to detail and a truly professional approach.
He completed the project with excellence, replies very quickly, makes every step of the execution clear, and shows deep knowledge of the subject.
Working with Ustym is very easy. He understands everything perfectly and he applies it very quickly.
Very agile and fast, effective and to the point, even on complex work.
I was very satisfied with Ustym’s work. Excellent professional, fast, competent and very efficient. Recommended.
He built a fully functional store from a local Microsoft SQL Server instance. Impressive work. I hope we can keep working together.
Excellent professional. Fast, polite, great work. Recommended.
Ustym is a top-tier professional. He is highly reliable, communicates effectively, and delivers high-quality work consistently on time. He is proactive, he does not just execute tasks but thinks ahead to provide the best solutions for the business. A true partner you can trust with your vision.
He is not just a developer, but a high-level technical partner able to engineer complex ESG and fintech solutions from scratch. He turned sophisticated industrial logic into a fluid digital platform. He bridges the gap between complex business requirements and clean, functional code.
Every stage was delivered with precision and care, inside deadlines I did not think were possible. His dedication cut my waiting time by 99%, which saved me money and let me go live far sooner, starting to profit almost immediately.
He made Agendux the complete SaaS appointment booking platform I envisioned, fully functional, stable and production-ready. What impressed me most was his ability to solve complex technical challenges. He was always responsive and transparent, and he far exceeded the original scope.
From the first contact he was extremely helpful, patient and professional. What I liked most was his commitment to delivering work that is genuinely well done. The result was exactly as I imagined it, and the whole process was calmer thanks to his dedication.
He quickly understood the existing system, validated the lesson logic, and improved the interaction flow with a clear, structured approach. He designed a clean, database-friendly content structure that makes future imports straightforward. Well executed and delivered on time.
Ustym is a very talented freelancer. He finished the project accurately and with surprising speed. I want to work with him again if I get the chance.
Reliable, honest and fast developer. He gave solutions that were coherent with the project. Thank you.
Very competent, dedicated and committed to delivery. He showed technical command, organisation and good communication throughout. The work went beyond expectations while always respecting the resources I had available.
He delivered ahead of schedule, with perfect technical results and a clear understanding of the requirements. The final result was accurate, clean and fully functional, showing great attention to detail and a truly professional approach.
He completed the project with excellence, replies very quickly, makes every step of the execution clear, and shows deep knowledge of the subject.
Working with Ustym is very easy. He understands everything perfectly and he applies it very quickly.
Very agile and fast, effective and to the point, even on complex work.
I was very satisfied with Ustym’s work. Excellent professional, fast, competent and very efficient. Recommended.
He built a fully functional store from a local Microsoft SQL Server instance. Impressive work. I hope we can keep working together.
Excellent professional. Fast, polite, great work. Recommended.
Verified reviews from Workana. Quotes left in Portuguese, Spanish and Italian were translated into English, originals unchanged on the platform.
Statistics · Kyiv, Ukraine
Strong foundation in algorithms, data structures, computer networks, databases and software engineering principles, applied across 8+ years of professional work.
Certified Blockchain Developer
JavaScript Algorithms & Data Structures
freeCodeCamp – Responsive Web Design
Keeping up with the latest in AI/LLMs, zero-knowledge proofs, Layer 2 scaling solutions, and modern React patterns.
Professional Working Proficiency
Native Speaker
Tell me what the business is losing today and I will tell you whether software fixes it. I work in your hours and I answer in writing.
Open to remote opportunities worldwide