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NII DARKU KOBLAH AMPONSAH DODOO
Full-Stack Engineer | Mobile Apps | Marketplaces | Commerce & Operations Platforms
Accra, Ghana • niidarkudodo@gmail.com • niidarku.com • github.com/niicode • linkedin.com/in/niicode
Summary
Full-stack software engineer who builds production web, mobile, and backend systems for marketplaces, retail, fintech, and service operations. 6+ years delivering products across React, Vue, Next.js, Expo/React Native, Flutter, Node.js, TypeScript, Laravel, PostgreSQL, Redis, Supabase, WooCommerce, and Google Cloud. Strong in end-to-end product ownership: architecture, APIs, databases, mobile release readiness, admin dashboards, payments, notifications, integrations, and deployment.
Technical Skills
Languages: JavaScript, TypeScript, Go, Python
Frontend: React, Next.js, Vue, Quasar, Inertia.js, Tailwind CSS
Mobile: Expo/React Native, Flutter, Swift/iOS, EAS/TestFlight/App Store release workflows
Backend: Node.js, Express, REST APIs, GraphQL, WebSocket, event-driven systems, Laravel
Databases: PostgreSQL, Prisma, Sequelize, Redis, MySQL, MongoDB, Supabase
Commerce & Integrations: WooCommerce, Paystack, SMS, push notifications, Google Maps, Cloudinary
Cloud & Tools: Docker, Git, GitHub Actions, Linux, Google Cloud Run, Firebase, Render
Professional Experience
Full-Stack Software Engineer
Sep 2024 – PresentBusyParade • Accra, Ghana
- • Architected and built BusyOS, a SaaS sales and inventory platform for retailers at joinbusyos.com, spanning Node.js/Express/TypeScript APIs, PostgreSQL data models, Vue/Quasar web UI, Flutter mobile, and Swift iOS prototypes
- • Designed multi-tenant company, membership, role, permission, audit log, product, order, sale, customer, purchase, expense, subscription, and integration models to support secure retail operations
- • Implemented POS, inventory, customer, order, reporting, analytics, billing, accounting ledger, stock alert, attendance, receipt, and platform administration workflows
- • Built WooCommerce product/order/inventory sync, webhook handling, SKU controls, receipt links, PDF receipts, SMS notifications, and Google Cloud Storage asset flows
- • Deployed Dockerized backend/frontend services to Google Cloud Run and maintained production-readiness docs, migrations, smoke checks, and operational repair scripts
Backend / Full-Stack Developer
Sep 2022 – Jan 2026Skippa Trading LLC • Remote, USA
- • Architected high-performance notification infrastructure for real-time trade alerts; delivered to 2,000+ users with sub-second latency (p99 under 500ms)
- • Implemented Redis caching and event-driven design; reduced API response times by ~40% (p99 from ~800ms to ~200ms) for time-sensitive data
- • Integrated multi-channel delivery (Discord, OneSignal, WebSocket); maintained high availability for trading operations
- • Owned reliability and performance of notification pipeline serving 50k+ alerts/day with high availability
Full-Stack Product Engineer
2025 – PresentIndependent / Client Projects • Accra, Ghana
- • Built Wukuada, an App Store-listed two-sided creator marketplace for Ghanaian businesses and creators, with Expo mobile app, Node.js/Express backend, Prisma/PostgreSQL schema, OTP/PIN auth, creator discovery, public jobs, private invitations, counter offers, push notifications, and admin verification workflows
- • Developed Greysole multivendor commerce infrastructure across WooCommerce, a custom WordPress marketplace plugin, Express/TypeScript services, seller admin web tooling, and Flutter customer/seller app foundations for thegreysole.com and seller.thegreysole.com
- • Built GHFIXER, a service marketplace for handyman requests and artisan dispatch, with React, Supabase, Google Maps, admin dashboards, SMS flows, and Africa's Talking IVR voice-call assignment with DTMF accept/decline handling
- • Delivered Pendiwus Ventures and Cobra Security web platforms with responsive product/service experiences, admin/product management, dealer/lead capture, brochure/contact flows, SEO-minded content, deployment documentation, and client-ready hosting workflows
Frontend Developer
Jan 2021 – May 2022BlueSPACE Financial Cloud • Accra, Ghana
- • Built frontend dashboards for multi-tenant insurance platform and contributed to government procurement portal
Selected Projects
Wukuada Creator Marketplace
App Store-listed mobile marketplace connecting Ghanaian businesses with creators for content creation, photography, videography, promotions, and creative jobs.
- • Built Expo/React Native app and Node.js/Express backend with Prisma/PostgreSQL, shared TypeScript domain package, OTP/PIN authentication, roles, creator/business profiles, and admin moderation
- • Implemented creator discovery, profile readiness, public job posting, private business-to-creator invitations, accept/decline/counter flows, accepted-job management, push notifications, SMS launch flows, and business verification
- • Prepared release artifacts including App Store copy, privacy/support URLs, TestFlight smoke-test checklist, demo review credentials, and production backend configuration
BusyOS Sales & Inventory Platform
Retail SaaS platform at joinbusyos.com for point of sale, inventory, customers, reporting, payments, website sync, and multi-location operations.
- • Built full-stack POS workflows across Node.js/Express/TypeScript, PostgreSQL, Vue/Quasar, Flutter, and Swift/iOS, with JWT auth, company switching, RBAC, permissions, and audit logs
- • Implemented products, orders, sales, split payments, discounts, receipts, stock restoration, customer history, reporting, analytics, expenses, subscriptions, attendance, and pharmacy inventory modules
- • Integrated WooCommerce sync/webhooks, Redis caching, SMS notifications, PDF receipt generation, Google Cloud Storage, Docker deployment, Google Cloud Run, migrations, tests, and repair scripts
Greysole Multivendor Marketplace
Commerce marketplace expansion for thegreysole.com and seller.thegreysole.com, combining WooCommerce storefronts, seller workflows, marketplace APIs, and operational admin tools.
- • Designed WooCommerce-centered marketplace architecture where WooCommerce remains source of truth and a custom WordPress plugin owns seller onboarding, product moderation, seller APIs, order fulfillment, ledger, withdrawals, returns, and support
- • Built plugin route scaffolds under /wp-json/greysole/v1, seller application/status flows, admin approval surfaces, seller dashboard foundations, marketplace tables, HMAC-signed service calls, and staging health checks
- • Worked across Express/TypeScript integration services, seller admin React/Vite tooling, Flutter customer/seller app foundations, payment reconciliation, notification, delivery, payout, and webhook service boundaries
GHFIXER Handyman Services Platform
Service marketplace for customers to request repairs and for administrators to manage artisans, dispatch, reports, calls, and customer support.
- • Built React/Vite frontend with Supabase auth/data, customer job request flow, artisan registration/profile management, admin dashboard, booking/report screens, Google Maps/Places, and storage for job photos
- • Implemented SMS provider integration and Africa's Talking voice workflow using Supabase Edge Functions for outbound calls, IVR prompts, DTMF accept/decline, artisan rotation, fallback SMS, and call analytics
- • Added operational documentation for database migrations, admin setup, deployment, voice integration, and production readiness
Pendiwus Ventures Product Catalogue
Laravel/Inertia/Vue product and dealer-inquiry platform for an Accra-based electronics distributor representing Samsung, LG, Midea, TCL, Nasco, and Amaz products.
- • Built public home, about, product, contact, dealer inquiry, and brochure flows around product categories including air conditioners, freezers, kitchen appliances, refrigerators, televisions, and laundry
- • Implemented product listing/detail flows, quote requests, waiting list, admin dashboard, product CRUD, image upload/storage, product variations/attributes, draft/published states, and Google Maps contact integration
- • Improved the frontend with responsive Vue components, product cards, testimonials, stats for 500+ customers and 5000+ annual products delivered, trust badges, dealer inquiry flow, accessibility states, animations, and reusable design primitives
- • Prepared Cloud Run, Cloudinary, storage, database, Docker, migration, and hosting documentation for production deployment
Education
Software Engineering Program — MEST Africa
2020BSc. Agricultural Engineering — KNUST
2015 – 2019