JoJoGDS — Portfolio

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Technical competencies

Frontend engineering (React/Next.js)

Next.js App Router, server/client components, route handlers, ISR/revalidate
SEO/metadata wiring; dynamic theme-color for mobile address bars
Typed custom elements interop; responsive grid/card layouts
External images/assets configuration and optimization

UI/UX design system & theming

Design tokens (ink/muted/bg/surface/sidebar/border/primary)
Dark/light mode, card/chip/pill/modal components
Consistent iconography (Heroicons/Material/custom SVGs)
Micro-interactions: hover/focus, subtle shadows, lift/border accents

Accessibility

Aria labels and keyboard focus visibility
Light/dark contrast and semantic structure
External link safety (rel=noopener noreferrer)

Performance, SEO & tooling

Static-first rendering, selective client components
Tailwind CSS 4, TypeScript, ESLint/Next config
Lightweight inline SVGs, responsive grids

Backend & APIs (Python/Django + PostgreSQL)

Python/Django backend architecture with REST endpoints for core business workflows
PostgreSQL data modeling, query optimization, and reliable persistence patterns
CSRF strategies, permission checks, and secure JSON payload design

AWS deployment stack

Compute & networking: EC2, VPC, ALB, Auto Scaling
Data & storage: RDS (PostgreSQL), S3
Edge & DNS: CloudFront, Route 53, ACM
Security & observability: IAM, CloudWatch, Systems Manager (SSM)
Containers & serverless: ECR, ECS/Fargate, Lambda

Payments & webhooks (CinetPay)

Checkout initiation, return_url/notify_url orchestration
Webhook HMAC (SHA-256) validation, reconciliation, audit logging
Currency/amount normalization; env-driven configuration

Security & data/media

Auth/ownership checks, CSRF handling, safe linking/escaping
Media pipeline (resize/normalize/thumbnail) and previews

Admin/backoffice UX

KPI cards; searchable/filterable grids with status chips
Detail modals with structured meta and themed surfaces

Testing, DevOps & i18n

Unit tests for payment flows and webhook verification
CI/CD-aware deployment practices across AWS infrastructure and secure environment configuration
Bilingual UX/documentation (FR/EN)