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Denis
Bondarenko

Average Review
0.00
Reputation
27
Finished gigs
0
Finished jobs
0
Website
github.com
Country
Not specified
Skills
Web, Mobile & Software Dev
IT & Networking
React
Node.js
QA
SQL
Front End
Back End Developer
Databases
API
Excel
SQLite
User Testing
Functionality testing
Docker
CI/CD
Debugging
Specialization
Next.js & Supabase Developer
Hourly rate
$20/hr
Preferred payment options
Ethereum
ETH
USDT
USDC
About me
I build client portals and diagnose authentication, permissions and data-access issues in Next.js and Supabase applications. My independent portfolio includes Client Portal Dashboard, with client/staff request workflows and SQL/browser checks, and TradePilot AI, a private React/TypeScript application using Vinext/Vite and Supabase for read-only exchange data and research. My background includes maintenance of security and low-voltage systems at the Russian Museum, State Hermitage Museum and National Library of Russia. I continue technical contract work alongside software projects. For Auth/RLS diagnostics, we agree one scenario. You receive reproduction steps, findings, recommendations and test results. Code fixes are scoped separately after diagnosis. Available for small development tasks, reproducible bug fixes and integrations. English: B1 (self-assessed).
https://www.linkedin.com/in/denis-bondarenko-a94491388

Work experience

Freelance | Self-Employed
February 2026 – Current time
Job title
Independent Web Developer | Next.js and Supabase
Work experience & achievements
Independent portfolio development with Next.js, TypeScript, Supabase and PostgreSQL. My work covers application workflows, migrations, access controls and API integrations. In Client Portal Dashboard, I worked on preserving unfinished repair notes and revoking staff access while keeping historical assignments, with SQL tests and browser regressions against an isolated backend. TradePilot AI uses React/TypeScript, Vinext/Vite and Supabase, with separate Node.js/Python research workers and Telegram notifications. Its source is private; architecture and screenshots are public.
Self-employed
January 2022 – Current time
Job title
Independent Technical Contractor
Work experience & achievements
Installation, commissioning and maintenance of CCTV, access control, fire alarm and other low-voltage systems. My work includes fault diagnosis, repairs, IP equipment configuration and integration with existing systems. I communicate with customers, agree the scope, plan the work and check operation before handover. I continue technical contract work alongside independent software projects.
Spetsavtomatika
March 2013 – March 2022
Job title
Security Systems and Automation Technician
Work experience & achievements
Installation, commissioning and maintenance of security and low-voltage systems at public and cultural facilities. National Library of Russia: intruder alarms, CCTV and access control; Dozor, Bolid, GeoVision, Hikvision, Axis and Honeywell. Maintenance to support round-the-clock operation and intruder alarms in new premises. Russian Museum: intruder alarms, CCTV and access control; Siemens, Honeywell, Bosch, Bolid, ITRIUM, Dozor, Hikvision and Axis. Maintenance, security systems for new exhibitions and intruder alarms in new premises. State Hermitage Museum: maintenance of Siemens fire alarm equipment to support round-the-clock operation.

Education

Synergy University
Graduation year: 2026
Level of study
Bachelor
Major / Field of study
Business Informatics
I will diagnose one Supabase Auth or RLS access issue
Web, Mobile & Software Dev
React
Node.js
$60
More info