CV

Experience

1. Freelance Sites and AI Workflows

   Self-employed · Costa Rica · Remote

   Nov 2024 — Present

   Freelance development of real estate, community, and directory sites: Tierra Viva Properties, Retreats of CR, Machuca Valley Community.
   Concept/MVP work on a parimutuel web3 game (github.com/deneskelenyi/web3-games-parimutuel).
   n8n and Python AI (LLM) workflows integrating WhatsApp (Meta and WABA) and Telegram into sites — content generation from group content and various user verifications.
   Automated content workflows: trending-topic discovery feeding LLM (Python) rewriters.
   Actively using Claude Code, Kimi, Cursor, and Hermes to create and assist workflows.

2. Developer / Solutions Engineer

   Sandstone Sourcing · San Mateo, Alajuela, Costa Rica · Remote

   Jun 2014 — Jan 2025

   Designed and developed infrastructure and software for an online marketing company (contract).
   Virtualized Linux and Windows servers (Proxmox, QEMU); brokers and queue managers (RabbitMQ, Mosquitto).
   Websites utilizing data from sports data providers (Tip-ex, Lsports, Plannatech, and others).
   Affiliate tracking for outbound and inbound traffic, plus performance monitoring.
   Asterisk/CMS (Suite) integration for inbound and outbound messages with Twilio.
   “Special markets” (competitions) manager mixing provider data and manual entry — FastAPI / RabbitMQ / PHP front-end.
   Managed virtualized infrastructure: mail (Postfix + LDAP), telephony (Asterisk), virtual workstations (Windows in QEMU on Debian), hosting (Nginx + Django, Postgres/MySQL, Apache).
   Cloud and bare-metal servers (Hetzner, AWS, Linode, Hostinger) and backups (Restic, rsync + rsync.net).
   Content-gathering automations (Playwright, Selenium); match-information aggregator using 20+ providers' chaotic data; automated AI-written article systems.
   Primary technical contact for providers, clients, and employees; most data integration into websites (PHP, FastAPI, CMS, WP).
   10+ years of continuously re-evaluating technologies and providers — KVM to QEMU, Java to Python, Asterisk to Twilio, Affiliate Pro to self-written solutions.

3. Lead Developer

   IDSca.com · Heredia, Costa Rica · Hybrid

   Jun 2010 — Jun 2014

   Designed and implemented high-volume data infrastructure; coordinated with software and data providers.
   Managed a team of 6–7 international programmers, DB administrators, and designers.
   Technologies: Java, ActiveMQ, LAMP stack, Websockets, MS SQL, Memcached. Provider technologies: Tip-ex, Betradar, ASI.
   Linux/middleware design and deployment of load-balanced/HA systems.
   Designed and implemented the rewrite of ASI software front-end (PHP); live-betting (Betradar) integration into the proprietary gaming system.
   Automated deployment of 1000s of white-label sites (DNS, site, front-end and back-end integration).

4. Developer

   IDSca.com · Heredia, Costa Rica · On-site

   Jun 2008 — Jun 2010

   Integration of content services (Donbest/XML) using Perl. Management and improvement of ASP sites; back-end management interfaces in PHP.
   Helped the administrator team with automation and system management: Asterisk, DNS, Apache config mass-generation for hundreds of domains.

5. ITO Support Specialist

   Hewlett Packard Enterprise · Santa Ana, San Jose, Costa Rica · On-site

   May 2006 — May 2007

   2nd-level support for clients' middleware components in an enterprise environment: Apache, WebSphere, WebLogic, JBoss, IIS, Windows, Linux, and UNIX.
   Knowledge transfers and training (UNIX, Apache, client-specific); transfer of middleware services from Delphi Auto to HP; CIBC accounts.

6. Affiliate Marketer / Programmer

   Self-employed · Heredia, Costa Rica · Remote

   Jun 2002 — Aug 2007

   Online business: SEO and e-commerce projects; CPA-based affiliate marketing and coordinator/programmer in affiliate software development.
   Managed development of a custom “set-your-price” online store with white-label frontends.
   Programming in PHP with JS and Perl, running LAMP and BSD servers; network/middleware projects around LAMP/Linux, affiliate sites, and SEO.

7. General / IT Manager

   Project B KFT · Budapest, Hungary · On-site

   Jun 2001 — Nov 2002

   Managed a small branch company providing e-commerce and gaming solutions (hosting, web design, marketing, customer and technical support). Responsible for 6+ person international staff.
   Administration of remote customer and in-house servers and network appliances — Linux / Cisco / networks / firewalls across offices.

8. Branch Office Manager — IT Specialist

   Project B KFT · Heredia, Costa Rica · On-site

   Jun 2000 — Jun 2001

   Kept services alive 24/7. Installation and management of servers and network appliances (Linux, Win2K, Cisco 2600/2900, Cisco PIX firewalls, Dell, Compaq, and custom-built servers).
   Managed a small office abroad and its customer-support staff.

9. IT Specialist

   Interware Hungary KFT · Budapest, Hungary · On-site

   Dec 1997 — Jun 1999

   Installation and maintenance of servers (Linux/Solaris) providing 24/7 Internet service: hosting, web (Apache, AOLserver), DNS (BIND), mail (Sendmail, Exim), DB (MySQL), dial-up (Cisco 5200, TACACS on Solaris and Linux), co-location, leased lines.
   Domain name registration; customer/technical support via phone and email.

10. Product Manager, Integrator

    Gutenberg Communication Systems · Budapest, Hungary · On-site

    Jul 1988 — Oct 1999

    System administration — designing, maintaining, and supporting networks; integrating the product line into existing networks with technical/customer support.
    Technical product manager for Webtrends products, Netscreen firewalls, Cobalt and Axis network appliances (trade shows, exhibitions, demonstrations).

Education