Yaroslav Perets
Private message 
Kharkiv,
Ukraine
available for hire
Rating
Language proficiency level
Русский: fluent
Українська: advanced
English: upper-intermediate
Skills and abilities
Programming
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AI & Machine Learning
from 11 USD for hour
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Bot Development
from 11 USD for hour
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Data Parsing
from 11 USD for hour
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Databases & SQL
from 11 USD for hour
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Desktop Apps
from 23 USD for hour
- HTML & CSS
- Java
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Javascript and Typescript
from 11 USD for hour
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Python
from 11 USD for hour
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Web Programming
from 11 USD for hour
Services
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AI Consulting
from 11 USD for hour
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Cybersecurity & Data Protection
from 11 USD for hour
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Data Processing
from 11 USD for hour
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Enterprise Resource Planning (ERP)
from 11 USD for hour
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Information Gathering
from 11 USD for hour
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Payment Systems Integration
from 11 USD for hour
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Website Development
from 11 USD for hour
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Website Maintenance
from 11 USD for hour
Administration
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DevOps
from 11 USD for hour
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Linux & Unix
from 11 USD for hour
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Software & Server Configuration
from 11 USD for hour
Translation
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English
from 23 USD for hour
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Text Translation
from 11 USD for hour
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Ukrainian
from 11 USD for hour
Writing
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AI Content Creation
from 11 USD for hour
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Technical Documentation
from 19 USD for hour
Portfolio
- All works 16
- PHP 2
- Java 3
- Python 4
- Web Programming 1
- Client Management & CRM 4
- AI & Machine Learning 2
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564 USD Authorization module for ERP system
Web ProgrammingParticipation in the development of a functional module for the ERP system with user authentication, access control, and preparation for further work with business roles.
What has been done:
… - Analysis of the ERP structure
- Preparation of the authentication logic
- User roles
- Verification of frontend/backend interaction
- Basic architecture of the module
- Preparation for system expansion
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902 USD AI Agent for logistics CRM
AI & Machine LearningAn AI Agent system has been designed for a logistics company: calculating delivery rates, monitoring drivers via GPS, tracking expenses, and payroll calculation.
What has been done:
… - AI Agent architecture
- Integration with GPS provider
- Delivery cost calculation
- Expense tracking
- Payroll calculation
- CRM logic
- Preparation of MVP structure
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789 USD Architecture of the Worklist service for DICOM
PythonThe architecture of the service has been designed, which receives directions from the medical information system via HL7/XML and transmits them to diagnostic equipment in DICOM format.
What has been done:
… - requirements analysis
- HL7/XML reception
- support for Cyrillic and Latin scripts
- DICOM tag configuration
- equipment registration
- GUI architecture for settings
- transmission logic to devices
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113 USD GA4, Meta Pixel, and Consent Mode Audit
JavaAn audit of the tracking system of the online store was conducted, where several methods of connecting analytics were simultaneously in use. Duplicates, conflicts, and attribution issues were found.
What has been done:
… - GA4 check
- Google Ads check
- Meta Pixel check
- Consent Mode analysis
- Duplicate tag search
- Purchase event diagnostics
- Recommendations for a unified tracking architecture
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677 USD AI/BI system for analyzing Prozorro tenders
PythonA backend system has been designed for tender analysis: customers, winners, competition, price reduction, recurring connections between companies, and searching for tenders with low competition.
What has been done:
… MVP architecture
Filtering by region and niche
Customer analysis
Winner analysis
Calculation of price reduction percentage
Searching for recurring connections
Telegram interface for notifications
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338 USD Telegram bot for project monitoring
PythonA Telegram bot has been developed that monitors new projects, filters them by stack, budget, keywords, and sends relevant options to Telegram.
What has been done:
… HTML parsing of projects
filtering by keywords
filtering by budget
sending notifications to Telegram
protection against duplicates
basic scoring logic for projects
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451 USD AI generator of SEO content for products
AI & Machine LearningA module has been designed for mass generation of SEO content for products: descriptions, specifications, meta title, meta description, and SEO texts.
What has been done:
… module architecture
mass generation of descriptions
working with OpenAI API
preparation of prompts
batch processing of products
logic for saving results in CMS
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406 USD AI image generator for Meta Ads
PythonA system has been developed that automatically takes products from an XML feed, generates advertising images according to a template, updates image links, and publishes a new feed for Meta Ads.
What has been done:
… - Parsing the XML feed
- Generating product images
- Working with templates
- Replacing image_link
- Creating a new meta_feed.xml
- Publishing via FTP
- Preparing for cron automation
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226 USD Correction of OpenCart exchange with 1C
PHPDiagnosis of unstable exchange between 1C and OpenCart/ocStore has been conducted. The main issue is that products were not created or were disabled after import due to incorrect handling of stocks and identifiers.
What has been done:
… - Analysis of exchange modules
- Verification of import.xml/offers.xml
- Search for conflicts between modules
- Check of product GUID/ID
- Diagnosis of quantity=0
- Preparation of corrections for import logic
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180 USD Exchange BAS/1C with WooCommerce by warehouses
PHPI improved the exchange between BAS/1C and WooCommerce so that the online store receives product stock with a breakdown by warehouses, not just the total stock.
What has been done:
… - Analysis of the current exchange
- Verification of the XML structure
- Improvement of the export
- Transfer of stock by warehouses
- Testing on a separate database
- Preparation for deployment to production
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271 USD Bitrix24 audit for multiple sales departments
Client Management & CRMAn audit of the CRM was conducted, where several business areas operated through one system. The main task was to correctly separate leads, sources, responsible parties, and technical accounts.
What has been done:
… - Sales lines analyzed
- Websites and forms checked
- Telephony verified
- Lead sources examined
- Logic for assigning responsibilities corrected
- Structure for reporting prepared
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338 USD Correction of lead distribution in Bitrix24
Client Management & CRMConducted an audit of CRM logic, telephony, and lead sources. Fixed the issue where leads created after calls were assigned to the wrong responsible persons and ended up on technical accounts.
What has been done:
… - Checked lead sources
- Analyzed the connection between telephony and CRM
- Found the cause of incorrect assignment of responsible persons
- Fixed the logic of operators
- Tested applications from different websites
- Prepared recommendations for CRM structure
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361 USD Integration of eBay with KeyCRM and warehouses
Client Management & CRMThe logic for receiving orders from eBay into KeyCRM has been implemented, reserving products in the necessary warehouse, and further writing off after the order is fulfilled.
What has been done:
… - Order transmission has been checked
- Reservation has been configured
- Order statuses have been analyzed
- Inventory write-off has been verified
- Logic for sets has been prepared
- Availability control scheme has been optimized
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406 USD Setting up warehouse logic in KeyCRM
Client Management & CRMConfigured the logic for order processing, product reservation, inventory write-off, warehouse management, and kits.
What has been done:
… - Configured warehouse logic
- Verified product reserves
- Analyzed manual inventory changes
- Checked scenarios with individual products and kits
- Prepared write-off logic after order processing
- Established the scheme eBay -> KeyCRM -> warehouse -> fulfillment
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496 USD Product analytics for SaaS subscriptions
JavaDesigned and implemented an event structure for a subscription-based SaaS: registration, account linking, subscription start, renewal, cancellation, refunds, and payment errors.
What has been done:
… - created an event map
- separated marketing and product events
- configured user identification logic
- prepared alias/identify schema
- set up events for funnel analysis
- implemented event transmission to GA4 and Mixpanel
Reviews and compliments on completed projects 19 1
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Real expert -
Craft master -
Quick answers -
First-class quality -
Nice communication -
High responsibility -
Great price -
Lightning fast
1 June
56 USD
Excel table for business management
Done quickly and with quality✅
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26 May
180 USD
Improvement and configuration of Bitrix24
The work was completed with high quality and in full. The performer quickly understood the issues with responsibilities in Bitrix24, eliminated the incorrect logic, and helped organize the technical accounts and integrations. They were always in touch, with adequate communication and a professional approach. I recommend for collaboration.
Everything is fine, the work is done well.
6 May
79 USD
Website edits
Everything is great, I am satisfied with the collaboration)
5 May
63 USD
Make a selection in the site configurator
Thank you for the work! Everything was done quickly and efficiently) I recommend for collaboration!
4 May
158 USD
Processing files for upload to the OpenCart website
An objective complex task, the performer tried to complete it, but it did not work out.
4 May
16 USD
Need help with Shoptet
The work was done well. Thank you.
1 May
34 USD
Setting up lead distribution in Bitrix24
I am completely satisfied with the collaboration. The performer did not just "take a look at something," but deeply understood the problem.
He found the real reason for the incorrect distribution of leads — not in the Bitrix robots, as we initially thought, but in the telephony integration (Binotel/API) and the mapping of sources. He explained the logic in detail, showed specific cases regarding leads and users, including non-obvious points with dismissed employees.
A separate plus for the approach:
- provides adequate recommendations on what and how to fix
- thinks like an analyst, not just a technical performer
26 April
16 USD
Corrections in Wordpress
Thank you for the work. Very prompt.
Everything was done quickly and efficiently. I recommend.
17 April
23 USD
Process the Excel file with the model.
Everything was done well, attentive to details, I can recommend for collaboration.
15 April
135 USD
Stage 3 of the implementation under the Keycrm key
Very good interlocutor. Tried to understand everything. And to launch the CRM project. Conducted everything carefully with video instructions. Wishing you successful dreams and desires in your work.
14 April
23 USD
Continuation of the 3rd part of keycrm
Thus, it was possible to implement what the system did not allow to do. Thank you sincerely.
8 April
45 USD
Creating a funnel in Google Docs
Quickly grasps information, ready to make adjustments, collaboration is satisfactory.
3 April
135 USD
Stage 2 of implementing logic in Keycrm
Thank you sincerely for your patience.
I hope everything planned will come true.
Let's continue.
Promptly. Clearly.
2 April
101 USD
Finalization of the website for SaaS
Yaroslav quickly and promptly identified the necessary adjustments for submission for Google's approval, and just as quickly made them.
The result is good.
The performer fully completed the task according to the specifications. All necessary functions were implemented correctly, and the result meets expectations.
Communication was quick and clear, and revisions were taken into account without any issues. I am satisfied with the work and will further refine it for my tasks.
I recommend for collaboration.
29 March
158 USD
Turnkey CRM system setup
Thank you for processing stage 1. Everything is clearly outlined. Let's move on.
15 March
180 USD
Correct the BAF(1C) program code.
Thank you for helping a good specialist.
Very competent specialist in his field.
Always in touch, will help, advise, consult (if needed).
He did what others could not!
There are few such capable specialists, so I will continue to work with him.
I recommend him to everyone, 100%.
Everything is great, thank you, promptly.
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Finalization of keycrm
23 USD
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