Sergiy Z.

Hello, I am a software developer, systems engineer, and technical troubleshooter with over 25 years of experience across diverse technologies and projects. As the founder of the Uacoders team, active on Upwork for approximately 20 years, I specialise in complex problem-solving, debugging, system integration, and developing practical, reliable software solutions. My profile : My Overall technology stack: ✓ Programming: Java, Python, Perl, C/C++, JavaScript, PHP, Ruby and others ✓ AI & Agentic Systems: ChatGPT, Claude, OpenCode, Ollama, local LLMs, MCP servers, AI agents, workflow automation. ✓ Databases: MySQL, Postgresql, Oracle, Informix, MS SQL, SQLite, MongoDB, BerkeleyDB ✓ JQuery, YahooUI, Angular ✓ Nginx, Apache, Lighttpd, and others. ✓ HHVM, FastCGI, Memcached, Varnish, Squid, HAProxy ✓ WebRTC, P2P. ✓ POSIX, Win32/Win64, Android, iOS, macOS ✓ Networking: TCP/IP, UDP, Firewalls, Routers, DNS (Bind9), DHCP ✓ Git, Subversion, CVS, Mercurial ✓ SSH, OpenSSL, PGP, Kerberos, Radius, ✓ Postfix, SPF, DKIM, DMARC. ✓ Debian, Ubuntu, RedHat, SuSe, CentOS, ArchLinux, Vyatta, Gentoo, Knoppix, Damn Small Linux, FreeBSD, NetBSD,OpenBSD, Mac OS X; non- *nix: DOS (MS,IBM,DR,MSX), Windows from 3.0 to Windows NT(including XP-10), OS/2. ✓ XML, JSON and msgpack, FTP, SMTP, libvlc, android, avconv (FFmpeg), FFmpeg, vlc, Wowza, evostream, ImageMagic, GD, ImgSeek, Gimp, RTMP, RTSP, HLS, DASH, MSS, HDS. ✓ My IT hobbies: 3D modeling and printing, FreeCad, CNC, Arduino, ESP32 ✓ Science: PhD in Finances (Crypto-assets) Some of my previous projects are available on Upwork history and portfolio.