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  1. Freelancers

Aleksandr T.

Offer Aleksandr work on your next project.

Ukraine Kyiv, Ukraine
currently online
A little busy a little busy
2 Safes completed
4 days 9 hours back
1 client
3 proposals made
on the service 4 years
Client profile
  • websockets
  • Axios
  • OAuth 2.0 / JWT / Passport
  • Nestjs
  • prisma
  • TaillwindCSS
  • tanstack query
  • Next.js
  • PostgreSQL
Freelancer Aleksandr T. — Ukraine, Kyiv. Core skill — Javascript and Typescript, Web Programming

Rating

Successful projects
No data
Average rating
No data
Rating
1131
Javascript and Typescript
59 place out of 3457
Web Programming
1058 place out of 6432

CV

Full-stack Engineer specializing in complex systems, architecture, and high-performance UI.

I deliver robust, end-to-end web applications where interface speed and backend stability are paramount. With deep expertise in the TypeScript ecosystem, I build resilient products featuring 100% type safety across the entire stack.

Key Expertise:

  • Backend & Infrastructure: Professional use of Next.js Server Actions for seamless data mutations without redundant API endpoints, significantly accelerating development and enhancing UX. Additionally, I build scalable RESTful APIs with NestJS for projects requiring a distributed architecture. Expert database management with PostgreSQL and Prisma ORM, ensuring data integrity and end-to-end type safety.

  • Frontend & Interactive UI: Building complex, state-driven interfaces with Next.js and Redux Toolkit. Specialized in Plain Canvas API—designing high-performance graphical tools (e.g., interactive calculators) from scratch without the overhead of heavy external libraries.

  • Data & Security: Designing secure authentication systems, session management, and third-party API integrations. My workflow follows the Full-stack Safety principle, maintaining rigorous standards from the database schema to the final UI components.

I follow Clean Code and SOLID principles, ensuring that the technical architecture perfectly aligns with the project's business objectives.

Skills and abilities

Programming

Services

Promotion


Mobile development

Translation

Writing

Portfolio


  • Portfolio

    Web Programming
    Portfolio — example of freelancer's portfolio work in category Web Programming
    Development of a personal portfolio website with a focus on high performance, animations, and modern stack (Next.js 16).

    Technology stack:
    - Frontend: #Next.js 16 (App Router), #TypeScript, #Tailwind CSS
    … - Animations: #Framer Motion
    - Backend: #Prisma ORM
    - Database: #PostgreSQL

    Infrastructure: #Vercel (Frontend), #GitHub Actions.

    Key implemented tasks:
    - Multilingual support (#i18n): Full support for multiple languages (EN/UA)
    - Forms: Developed a multi-step contact form with client-side and server-side validation, spam protection, and notification sending.
    - PDF: automatic generation and upload of portfolio in #PDF
  • 4000 USD

    A full-featured E-commerce platform on Next.js (Full-stack)

    Online Stores & E-commerce
    A full-featured E-commerce platform on Next.js (Full-stack) — example of freelancer's portfolio work in category Online Stores & E-commerce
    A full-featured trading platform built on modern #Serverless technologies. The project combines complex business logic, fintech solutions, and an advanced marketing automation system.

    Key features and technical solutions:
    1. Architecture and performance:
    … - #Next.js & #ServerActions: Complete transition to server-side actions for data processing, which minimizes the client bundle and speeds up interaction with the interface.
    - Security: #NextAuth integration for flexible authentication. Two-factor authentication (#2FA) and #Google login have been added.
    - #RateLimiting: Use of #upstash/redis to protect against overloads and bots (request rate limiting).

    2. Smart Commerce and Loyalty:
    - Dynamic discount system: Automatic recalculation of prices in the cart based on quantity. A progress bar has been implemented: the system prompts you to add items to reach the next discount level.
    - Bonus system: Cashback accrual is based on the total order value.
    - Multicurrency: Exchange rate API integration with automatic real-time price recalculation.

    3. Integrations and logistics:
    - Payments: MonoPay is enabled for accepting online payments.
    - Delivery: Nova Poshta API integration (branch selection, data calculation).
    - Notifications: Notification system in the account, via email, and on Telegram via a custom bot.

    4. Personal account and Dashboard:
    - Client account: Order history storage, favorites system, profile settings management.
    - Reservation system: Reserve functionality for items with the "Waiting" status.
    - Dashboard: Visualization of the number of orders, accumulated bonuses, and active favorites.

    5. Administration:
    - Full-featured admin panel.
    - Telegram monitoring for the owner: instant alerts about new orders, customer messages, user registrations, and administrator logins.

    6. Content:
    - Use of #marked to render complex product descriptions from #Markdown.

    "The project is designed for high loads and maximum data security at all levels (from the database to server functions)."

    ----------------------------------

    - Sale of a ready-made solution (license) with free support (1 month) - $1,500.
    - Development from scratch at a similar level - from $4,000

  • Authentication with access roles

    Web Programming
    Authentication with access roles — example of freelancer's portfolio work in category Web Programming
    Security functions:
    - CSRF protection with token verification
    - HTTP interceptors for automatic token handling
    - Secure configuration of #cookie files
    … - Role-based access control (ADMIN, MODERATOR)

    #JWT Authentication with #Jose:
    - Secure signing and verification of tokens using the Jose library
    - Cookies only for #HTTP to store tokens
    - Automatic handling of token expiration

    Guards and middleware:
    - AuthGuard for authentication protection
    - RoleGuard for role-based access management
    - #Next.js middleware for route protection
    - Automatic redirects on unauthorized access

    HTTP client with interceptors:
    - Automatic injection of #CSRF tokens
    - Handling 401/403 errors
    - Request/response interceptors
    - Credential management

    https://auth-jwt-role.vercel.app
  • 2000 USD

    Geolocation Administration

    Web Programming
    Geolocation Administration — example of freelancer's portfolio work in category Web Programming
    Manage your business locations across different platforms
    The project is developed on #Next.js 15 #TailwindCSS #API #prisma #Supabase

    https://geolocation-dashboard-cyan.vercel.app/
  • 11 USD

    Website parser

    Web Programming
    Website parser — example of freelancer's portfolio work in category Web Programming
    The parser is written in #Next.js 15
    Possible extension of functionality
    Adding an admin panel

    … https://website-parser-iota.vercel.app/
  • 100 USD

    Auto Leasing

    HTML & CSS
    Auto Leasing — example of freelancer's portfolio work in category HTML & CSS
    #Landing Page Auto Leasing developed on #Nextjs #TailwindCSS
    Multilingual (Russian/Ukrainian)
    #Leasing Calculator

    … https://car-leasing-vert.vercel.app/
  • 180 USD

    Price comparison service in grocery stores

    HTML & CSS
    Price comparison service in grocery stores — example of freelancer's portfolio work in category HTML & CSS
    Test page works on the frontend written in #Nextjs 15, #TailwindCSS 3, #Redux Toolkit.
    Further development may include #API #Prisma #Supabase or backend: #Nest js, Prisma, #PostgreSQL, also implementing authentication #JWT, #OAuth, development and implementation of #parsers.

    https://comparing-prices-in-supermarkets.vercel.app
    … Test admin page: https://comparing-prices-in-supermarkets.vercel.app/admin
  • 300 USD

    Repair of apartments

    HTML & CSS
    Repair of apartments — example of freelancer's portfolio work in category HTML & CSS
    #Frontend - #next.js #tailwindCSS #scss
    #Backend - #nest.js #prisma #postgresql

  • The CRM Dashboard

    Javascript and Typescript
    The CRM Dashboard — example of freelancer's portfolio work in category Javascript and Typescript
    The layout with #HTML5 #CSS/CSS3 #ReactJS #Bootstrap

  • Taxi Routes

    Javascript and Typescript
    Taxi Routes — example of freelancer's portfolio work in category Javascript and Typescript
    Creation of the Taxi Web App:
    1 . The user introduces the starting point and the final point (the automatic completion function is provided)
    2nd The route is built on a map with approximate time of route.
    3, the user can choose the tariff plan and make a order
    …
    Developed app on #NextJS #React #react-redux #redux-toolkit #Tailwind #googleApi

  • List of K&C Messages

    HTML & CSS
    List of K&C Messages — example of freelancer's portfolio work in category HTML & CSS
    Cross-browser adaptive, semantic #HTML c using #CSS/CSS3, #Pixel Perfect. The #Mobile version.

  • Landing page

    HTML & CSS
    Landing page — example of freelancer's portfolio work in category HTML & CSS
    #LandingRage adaptive design made using #Bootstrap #HTML5 #CSS/CSS3

Reviews and compliments on completed projects 2

1 June 256 USD
Create multilingualism

Quality
Professionalism
Cost
Contactability
Deadlines

Satisfied with the multilingual functionality for our platform with the admin panel! We continue working.

Tony Aliyev | Personal | Response review

17 May 77 USD
Need a developer Nodejs, Nestjs + MongoDB & Postgre

Quality
Professionalism
Cost
Contactability
Deadlines

The assigned task was completed quickly and professionally! I recommend!

Tony Aliyev | Safe Safe | Response review

Activity

  Latest proposals 10
Full-stack development
2200 USD
Create a client card (form) service
2742 USD
Create multilingualism Personal project
256 USD
Looking for a Frontend Developer (Next.js) - project work
23 USD
Frontend (Next.js 16+ / React 19) for a ticket sales platform
16 USD
Server solution for shift scheduling
609 USD
Need a developer Nodejs, Nestjs + MongoDB & Postgre
77 USD
Marketplace of services
609 USD
Make 4 solutions on Claude Code/Design
113 USD
Launch of MVP online language school: landing page, registration, payment, Meta Pixel
1162 USD