Vladislav Z.
Offer Vladislav work on your next project.
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Offer work
Warszawa,
Poland
8 days 4 hours back
available for hire
4 proposals made
age 26 years
on the service 3 years
Rating
Successful projects
Average rating
Skills and abilities
Programming
- AI & Machine Learning
- Databases & SQL
- HTML & CSS
- Java
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Testing & QA
from 10 USD for hour
- Web Programming
Design & art
Services
Promotion
Translation
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Polish
from 7 USD for hour
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Text Translation
from 7 USD for hour
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Ukrainian
from 7 USD for hour
Portfolio
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10 008 USD nexum crm
Web Programming
Personal project for the development of a comprehensive CRM system (actively being developed), created to optimize internal processes, manage client data, and automate routine tasks. The main focus is on speed of operation, reliability of the database architecture, and maximum data security.
Technical stack and architectural solutions:
… Backend: Node.js using the Express.js framework. A clean REST API architecture has been built with a clear separation of responsibilities (routes, controllers, services).
Database & Infrastructure: Supabase (PostgreSQL) has been used. A relational table structure has been designed, relationships (One-to-Many, Many-to-Many) have been set up, indexes for optimizing complex queries, and mechanisms for cascading data deletion have been configured.
Security & Authorization: A robust user authentication and authorization system has been implemented (JWT tokens / Supabase Auth). Row Level Security (RLS) has been introduced in the database, completely eliminating information leakage between different accounts.
Quality Assurance (QA) and Testing Process (Your main feature):
Since I combine the roles of developer and QA engineer, the project is developed according to high code quality standards:
API Testing Automation: A complete collection of integration tests in Postman has been created and maintained. The verification of status codes, validation of JSON response schemas, and correctness of data transmission between endpoints have been automated.
Business Logic Testing: Scripts have been written to simulate critical user scenarios (creating a lead -> changing status -> generating a report) to check the integrity of the database under load.
Current Status: The project is in the active expansion phase (adding analytics modules and integrating external APIs). The code is maintained in Git following the Git Flow methodology.
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41 USD Art of Massage
Logo Design
Logo and gift certificate design for the "Sztuka Masażu" salon. Comprehensive visual identity design: vector logo, preparation of the card for professional printing, and integration of functional QR codes (Social Media). Modern and elegant minimalism.
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548 USD Andrika’s Home Service (Canada)
Web Programming
Comprehensive implementation of a multi-page website for a Canadian company providing residential and commercial cleaning services. The project was executed from scratch — from the concept of the subpage structure (Architecture & UX) and coding to complete quality testing (QA).
Scope of work and technical solutions:
… Multi-Page Structure & UX: Designing the logical architecture of information. The site contains dedicated sections: About Us, Why Choose Us, Services, and Contact. The structure facilitates quick access to the price list and the list of services, which directly increases conversion.
Frontend Development: Clean, efficient code written to HTML5, CSS3, and JavaScript standards. The layout was developed based on modern positioning methods (Flexbox/Grid), ensuring rendering stability.
Call to Action (CTA) & Integration: Implementation of active elements for easy communication with the company (Click-to-Call feature for the phone number and direct integration with the email address).
SEO & Optimization: Use of semantic HTML tags (header, nav, section, footer) that are friendly to Google bots, as well as optimization of media file sizes to reduce page load times (Speed Optimization).
Quality Assurance Process (QA / Testing):
As a software tester (QA), before project delivery, I conducted a complete testing cycle:
Cross-Browser & Cross-Device Testing: Verification of correct and identical layout display across different engines (Chromium, WebKit, Gecko) and devices (iOS, Android, Windows).
Responsive Testing (RWD): Checking that navigation elements (including the mobile hamburger menu) and forms are 100% user-friendly on smartphone screens.
Functional Testing: Validation of links, correctness of redirects, and functionality of interactive sections.
Project Status: Deployed, fully responsive, and successfully operational.
Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
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E-Shop Build
1200 USD
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Need a QA to fully cover the project with automated tests and check the project for the functionality of features.
220 USD
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Translate Ad Text from Ukrainian to Russian
1500 USD
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Premium Electronics Trade-In Website
1999 USD
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QA testing of the user journey (landing → Free Trial)
50 USD
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Operational Coordinator / CEO Assistant (Polish language, logistics)
26 USD
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Development of car sticker design
139 USD
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Creation of a video reel for the AI model Nanobonana, kling
21 USD
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Online store with digital files
960 USD
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Looking for VPN Service Developer
823 USD
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