Joel Jorge

Performance-obsessed engineer who turns component debt into measurable Core Web Vitals wins and ships reusable systems that outlast every sprint.

Frontend Developer - Mirantes Technologies - Luanda, AO

(2024-01)

• Designed and shipped a shared React component library used across 3+ internal products, cutting average feature-delivery time by an estimated 30% through zero-duplication reuse.
• Identified and eliminated excessive re-renders using React DevTools profiler; resolved 12+ prop-drilling and missing-memo issues that caused visible lag on low-end devices common in the target market.
• Drove Lighthouse scores from the mid-60s to 90+ on key pages by implementing lazy loading, codesplitting, and image optimisation — directly improving user retention on slow connections.
• Owned the full deployment pipeline: staging validation, environment variable management, and production release coordination — zero unplanned rollbacks in tenure.
• Acted as the de-facto decision-maker on tech selection (libraries, patterns, tooling), ensuring long-term maintainability over short-term convenience.

Frontend Developer Intern - Mirantes Technologies - Luanda, AO

(2024-01 - 2024-05)

• Collaborated with QA to define acceptance criteria for UI flows, accelerating test cycles by removing ambiguity from the definition of done.
• Earned a full-time offer at end of internship based on output quality and direct contribution to production architecture.

Fullstack Developer - PRO IT Consulting - Luanda, AO

(2020-06 - 2023-12)

• Engineered an XML-to-REST authentication gateway in Express bridging a legacy XML auth system with modern REST consumers, enabling incremental migration without a full rewrite.
• Implemented event-driven inter-service communication using RabbitMQ, decoupling Node.js/Express microservices and improving fault isolation across the system.
• Delivered a full-cycle 360 degree performance evaluation platform (Next.js + Express) from requirements to production, replacing a manual spreadsheet process for staff appraisals.
• Built a Dialogflow-powered contextual chatbot API that routed queries to the correct department automatically — eliminating manual triage and reducing response handling time across the organisation.
• Gained hands-on microservices experience: containerised services with Docker, set up CI pipelines in Jenkins, and implemented OAuth 2.0 authentication — providing a strong ops foundation rare in pure frontend engineers.

BSc in Informatics Engineering - Informatics Engineering (2021)