Kostyantin Y.
Offer Kostyantin work on your next project.
Private message 
Offer work 
Lvov,
Ukraine
8 minutes back
responds to 75% of messages
available for hire
4 Safes completed
9 days 11 hours back
4 clients
20 proposals made
on the service 7 months 26 days
Rating
Language proficiency level
Українська: fluent
English: advanced
Polski: pre-intermediate
Deutsch: pre-intermediate
Skills and abilities
Programming
Design & art
Photo, Audio & Video
Mobile development
Outsourcing & consulting
Portfolio
- All works 9
- Python 1
- Interface Design (UI/UX) 1
- Cybersecurity & Data Protection 1
- Web Programming 1
- AI & Machine Learning 1
- Bot Development 1
- DevOps 2
- Enterprise Resource Planning (ERP) 1
-
120 USD UI/UX Design and Presentations
Interface Design (UI/UX)I make sure that your product or idea looks convincing — for clients, investors, partners.
What I create:
— UI/UX design of websites and applications in Figma
— Investment presentations and pitch decks
… — Infographics, banners, corporate identity
— Technical descriptions and business documentation
Design that is not just beautiful — but leads the user to action.
-
150 USD N8N / Process Automation
AI & Machine LearningI connect your services without programming — so that data is automatically transferred where it needs to go.
What I automate:
— Applications from the website → CRM → Telegram notifications to the manager
— Google Forms / Sheets → any service
… — Automatic mailings, reminders, reports
— Integration between CRM, ERP, messengers
I work with N8N, Zapier, Make — saving hours of manual work every day.
-
80 USD Excel / VBA Automation
Enterprise Resource Planning (ERP)
I transform Excel into a full-fledged accounting or analytics system for your business.
What I do:
— Automated tables: income/expenses/balances, salaries, reports
— Financial models and dashboards
… — VBA macros — to avoid doing the same thing manually
— Power Query — collecting and processing data from various sources
If you have chaos in your spreadsheets — I will create a clear working system in 1-2 days.
-
300 USD DevOps & Infrastructure Automation
DevOps
I specialize in building reliable and scalable infrastructure, automating processes, and ensuring stable application performance. My approach combines DevOps practices with DevSecOps principles, allowing for the creation of secure, efficient, and scalable solutions.
What is included in my services:
… Setting up CI/CD for fast and secure deployment.
Containerization and orchestration: Docker, Kubernetes.
Monitoring, logging, and alerting: Prometheus, Grafana, ELK.
Automation of routine processes and infrastructure as code support (Terraform, Ansible).
Performance optimization and scaling for high-load systems.
My goal is for your infrastructure to operate smoothly, quickly, and securely, allowing you to focus on business development.
-
50 USD Bot's creation
Bot Development
I offer a full cycle of bot creation - from idea and logic design to deployment and further support. I create smart, flexible, and stable bots for various platforms (Telegram, Discord, Slack, web, etc.) with API integration, databases, and external services. I focus on process automation, interactivity, usability, and data protection. Each bot is developed with specific client goals in mind - from business assistants and support systems to analytical or security solutions.
-
75 USD Python development
Python
I am ready to execute your projects according to your wishes, as efficiently and qualitatively as possible. I guarantee support for developments after the completion of our collaboration until the relevant deadlines.
-
400 USD Cybersecurity, Security Audit, and DevOps Infrastructure
Cybersecurity & Data Protection
I provide a full range of services to ensure the reliability, security, and high availability of your systems.
My expertise includes:
Audit and Pentest (Penetration Testing): Comprehensive testing of web applications, APIs, and infrastructure for vulnerabilities. Detection and remediation of security "holes."
…
Infrastructure Protection: Configuration of Firewalls, WAF (Web Application Firewall), intrusion detection systems (IDS/IPS). Protection against DDoS attacks.
Cloud Environment Security: Configuration of secure setups on AWS, Azure, GCP. Access management (IAM) and encryption.
DevSecOps: Integration of security processes directly into the development cycle (CI/CD). Automation of code vulnerability scanning (SAST/DAST).
Setting up DevOps tools: Implementation of Docker and Kubernetes for application isolation and scaling. Automation of deployment (CI/CD) using GitLab CI, GitHub Actions, Jenkins.
Monitoring and Logging: Configuration of security and performance monitoring systems (Prometheus, Grafana, ELK Stack).
-
250 USD Web-development
Web Programming
I offer a full range of web development services, from conceptual design to the implementation of high-availability infrastructure.
I create modern, fast, and secure web solutions of any complexity.
-
500 USD Portfolio
DevOps
Comprehensive engineering portfolio focused on DevSecOps, SRE (Site Reliability Engineering), and high-performance automation.
Reviews and compliments on completed projects 4
25 May
79 USD
Code review + refinement of the ATS platform
Quality
Professionalism
Cost
Contactability
Deadlines
Quickly and qualitatively, I recommend.
|
1 April
45 USD
Protection from bots
Quality
Professionalism
Cost
Contactability
Deadlines
Thank you for the work! I am working with this specialist for the first time, but I am pleasantly impressed by the quality of execution and the level of communication. Everything is clear and prompt! The specialist quickly understood the existing problem and even found deeper underlying issues that also affected the solution to the task. I recommend collaborating and will reach out myself in the future!
7 January
16 USD
Technical assessment of the current state of the system and development roadmap.
Quality
Professionalism
Cost
Contactability
Deadlines
The work was completed ahead of schedule. He understood all the nuances, helped with the setup, and suggested optimal solutions. I recommend for collaboration.
Pavel G.
| Personal | Response review
27 October 2025
30 USD
PARSING ACCOUNTS | IN TELEGRAM CHANNELS
Quality
Professionalism
Cost
Contactability
Deadlines
The best and most honest performer of all I have encountered before. Gorgeous work, very responsive, always online for any questions. You can always reach out to him if something goes wrong, and I also plan to offer more projects to this specialist, as I am very satisfied with the result!
Vladyslav Officer
| Personal | Response review
Activity
| Projects underway 1 | Budget | Added | Deadlines | Proposal | |
|---|---|---|---|---|---|
|
Collection of a database of websites without mandatory legal documentation
23 USD
|
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
|---|---|---|---|---|---|
|
Development of an AI agent and integration of messengers (TG/WA) with CRM based on Claude SDK (Python/JS)
226 USD
|
|||||
|
Implement the ready design and code in the web platform
23 USD
|
|||||
|
Framer Developer for transferring design from Figma (B2B website)
226 USD
|
|||||
|
Bring the website to a modern responsive look
135 USD
|
|||||
|
I am looking for a backend/full-stack developer to create a cloaking service.
23 USD
|
|||||
|
Telegram Mini Apps application (WebView + multilingualism)
180 USD
|
|||||
|
Deployment of Element on a personal Debian 13 server
90 USD
|
|||||
|
Banners
56 USD
|
|||||
|
Create a logo
12 000 USD
|
|||||
|
Visual creation of a checklist of 35 pages
113 USD
|