Renier du Plessis
Founder & Lead Architect at Agent Builder (agentic-plugin.com)
@r3n13r Atlanta, GA, USA joined Jun 2026
Current Job
Founder & Lead Architect
Jan 2026 –
Present
Agent Builder (agentic-plugin.com)
Designed and shipped Agent Builder — native no-code AI agent platform for WordPress enabling autonomous agents to perform real site actions: content generation, SEO optimisation, security monitoring, WhatsApp visitor chat, and WooCommerce management. Built multi-agent orchestration engine, Meta Agent (natural-language agent creation), per-agent WhatsApp channels, approval workflows, and cost tracking dashboard. Architected full WordPress integration with hooks, capabilities, REST API, and WP-CLI; supports OpenAI, Claude, Grok, Gemini, Mistral, Llama, and Ollama. 100% WordPress Coding Standards compliance, zero PHPCS warnings, 400+ automated tests.
Job History
Founder & Platform Architect
May 2026 – Present
CPD Platform (cpd.mg.co.za)
Designed and built a multi-tenant SaaS platform for CPD validation serving engineering bodies regulated by ECSA. Stack: Node.js / Fastify / TypeScript API, React / Fluent UI frontend, MariaDB + Prisma ORM, BullMQ / Redis job queue, GCP Cloud Storage, Nginx wildcard subdomain routing. Implemented infrastructure-level multi-tenancy with 6-stage application pipeline, 15+ substates, role-based workflows, and automated document generation. Partnered with SAICE head of training to position as an ECSA industry initiative.
Full Stack Developer & Platform Architect
Feb 2026 – Present
SAICE
Built Power Apps Canvas applications integrated with Microsoft Dataverse to process hundreds of ECSA-compliant engineering CPD applications annually. Designed multi-screen forms with validation, draft/resume, role-based workflows, and automated document generation via Power Automate. Engineered Power Automate flows for multi-stage approval, SharePoint document management, and automated email notifications. Managed version-controlled development via Azure DevOps Git.
WordPress Developer
Jan 2025 – Present
FundaManje
Built interactive National Benchmark Tests and high-school mathematics practice platform on WordPress. Developed custom post types, quiz logic engine, student progress tracking, and educational content delivery for a London-based EdTech platform.
Full Stack Developer & Cloud Architect
Dec 2010 – Present
Mail & Guardian
Led development and high-availability architecture for South Africa's premier investigative news platform u2014 2M+ monthly users, 1.7M page impressions/month. Designed Africa's first clustered MySQL database for a media house u2014 recognised internationally and published. Architected cloud migration, WordPress multisite, CDN, and caching layers; maintained 99.9% uptime across 15+ years.
Key Accomplishments
Architected and led full technology stack at Mail & Guardian for 15+ years u2014 GCP infrastructure, custom WordPress platform, headless builds, and data pipelines. Delivered continuous uptime through server upgrades, CDN integration, and cache layers while growing the platform from a static CMS to a fully dynamic, AI-augmented newsroom.
Built Agent Builder u2014 no-code AI agent platform for WordPress u2014 from zero to production. 100% PHPCS compliance, zero warnings. Multi-agent orchestration across 7 LLM providers (OpenAI, Claude, Grok, Gemini, Mistral, Llama, Ollama). 400+ automated tests. Developer marketplace launching Q2 2026.
Designed Africa's first clustered MySQL database for a media house u2014 recognised internationally and published. This architecture powered Mail & Guardian's high-availability platform serving 2M+ monthly users and 1.7M page impressions/month with 99.9% uptime across 15+ years.
Recent impact
Score weights high-impact work (commits, releases, approved translations, props) at 3x routine activity.
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