Sergey Klevtsov
Offer Sergey work on your next project.
Private message 
Offer work 
Riga,
Latvia
1 month 11 days back
available for hire
age 58 years
on the service 9 months 19 days
Rating
Successful projects
Average rating
Language proficiency level
Русский: fluent
English: advanced
Skills and abilities
Programming
-
Content Management Systems
from 1747 USD for month
-
Databases & SQL
from 2330 USD for month
-
HTML & CSS
from 1747 USD for month
-
Javascript and Typescript
from 2213 USD for month
-
Web Programming
from 2330 USD for month
Portfolio
-
Accenture ESG LLM — corporate application for ESG assessment
Javascript and Typescript
Development of application components, testing and debugging. Conversion of design to HTML.
#React/TypeScript #GIT #Figma #Next.js
-
Super AI Challenge
Javascript and Typescript
Competition work dedicated to the study of Superintelligence problems.
#React.js #NextJS #CSS3\HTML5
-
The Rich North Sea Toolbox — information center
Javascript and Typescript
Development of an application on Vue.js from scratch, team leading.
#CSS3\HTML5 #Vue.js #GIT
-
BMW — Archive of models of the legendary car manufacturer
HTML & CSS
Development, support, and testing of application components
#JSP #HTML/CSS/JavaScript #GIT
-
Carlsberg — one of the leading brewing companies in Europe
Javascript and Typescript
Development, testing, and support.
#javascript #CSS3\HTML5
-
Swisscom — the largest Swiss mobile operator
Javascript and Typescript
Development of application components, support and bug fixing
#angular #typescript #GIT
-
Vodafone — the largest British mobile operator
Javascript and Typescript
Work on application components, support, development, and bug fixing.
#React/TypeScript #GIT #Frontend #UnitTest
-
Credit Suisse — a legendary (at the time) Swiss bank
Javascript and Typescript
Work on the client's account. Included the development of new components, support for functionality, and bug fixing.
#React.js #CSS3\HTML5 #MobX #GIT #Jest
-
Elkjop — One of the largest Scandinavian electronics stores
Content Management Systems
Website built on the Intershop platform
#HTML/CSS/JavaScript/jQuery #GIT #SVG #retail
-
Volvo — a legendary car manufacturer
HTML & CSS
Website dedicated to the history of Volvo
#HTML5/CSS3/SCSS/SASS #GIT
-
VHI — The largest Irish insurance company
HTML & CSS
Website of the largest Irish insurance company (2016).
#HTML-layout #Less #jade #javascript #modules #svn #CI/CD #jenkins
-
MarketBridge — Part strategic consultancy, part top-ranked agency
HTML & CSS
Development, support, and testing of application components.
#AngularJS #GIT #CSS(.saas)
-
Messenger for website
HTML & CSS
Messenger designed for communication between site employees and visitors.
#HTML/CSS/JavaScript #BackboneJS
-
Construction company
HTML & CSS
Website of a construction company. Originally created on Joomla (now - Bitrix). Responsive design, #html/css/js 5 #jquery #javascript
Activity
| Latest proposals 7 | Budget | Added | Deadlines | Proposal | |
|---|---|---|---|---|---|
|
Frontend Developer (Landing Pages) — project work
408 USD
|
|||||
|
Part-time: React/Next.js/NodeJS developer (AI, Vibe coding, 20–40 hours per month)
815 USD
|
|||||
|
Front-End developer for the web application AI Interview Helper (Next.js, Tailwind, shadcn)
490 USD
|
|||||
|
Web3
48 USD
|
|||||
|
Manual transfer of the website from Jimdo platform to WordPress
1200 USD
|
|||||
|
Design and development of a website for a motorsport coach / turnkey website
1037 USD
|
|||||
|
React+Next layout
680 USD
|
