Featured Projects
Distributed Digital Wallet System
A four-service microservices wallet featuring double-entry accounting, exactly-once delivery via a Transactional Outbox, Redis-backed idempotent transfers, and event-driven Kafka/RabbitMQ messaging with a Dead Letter Queue. Secured with Keycloak OAuth2/JWT behind a Resilience4j-hardened gateway, with full Prometheus/Grafana observability, Testcontainers tests and one-command Docker Compose deploy via GitHub Actions.
Congo National Election System
A nationwide electoral platform: a comprehensive suite of RESTful APIs built with ASP.NET Web API and SQL Server, managing electoral data for 40M+ users. Secured with Identity Management and JWT-based authentication, architected for high-concurrency with 99.9% API uptime, and tuned with advanced indexing and stored procedures for low-latency national reporting.
BlackBox System
Led the development of 8+ Spring Boot and PostgreSQL microservices powering the BlackBox System, improving data processing throughput by 25%. Built automated reporting modules in Spring Boot and Java that save government administrators 10+ hours of manual work every week.
WooCommerce E-Commerce Platform
Ongoing development and maintenance for a Canadian peptide e-commerce brand. Designed a tiered sale campaign (30% single-unit, 40% bulk packs) on WooCommerce variable-product attributes with correct regular-vs-sale base logic so bulk pricing calculated against MSRP, and built a custom animated PHP promo banner pulling live pricing across 15 products and ~30 variations. Recovered the store from a full-site outage caused by an Elementor core/Pro version mismatch — selective reactivation across ~70 plugins with zero data loss — and re-architected a discount plugin's pricing after diagnosing a WooCommerce price-filter bug outside product-page context. Ran a compliant double opt-in re-permission campaign over a 3,000+ contact list with Fluent Forms and FluentCRM. All custom logic shipped as isolated, toggleable WPCode snippets — no direct theme edits.
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