Software Engineer / Product EngineerAvailable

Empereur-Devproductportfolio.

66projects built

Products, apps, platforms, data and infra, from prototype to production.

4core domains

Mobile, product web, backend systems and cloud/infra.

iOS / Androidshipped apps

Expo, React Native, Firebase, publishing and device QA.

Prodoperated services

DNS, SSL, monitoring, storage, routing and deployment.

01 / Case studies

Work that matters.

Three focused cases showing the real work: product, architecture, mobile, APIs and production delivery.

Colibri / Live productOpen site

0012026 / Logistics platform

Colibri

A complete delivery ecosystem: customer and courier apps, API, real-time GPS, notifications, payments and operational dashboards.

GPS tracking and geolocation
Push notifications and dispatch
App Store, TestFlight and Play Console

React NativeExpoNode.jsPrismaPostgreSQLFirebaseDocker

Open site

BagX / Live productOpen site

002Marketplace / Mobile

BagX

A collaborative marketplace connecting travelers and senders through available luggage capacity.

Traveler and sender matching
KYC, payments and reviews
Chat, tracking and multilingual flows

React NativeExpoLaravel 12MySQLKYCTracking

Open site

Developer tool / Runtime Android + iOS

$ runtime doctor --device

✓ ADB connected Pixel_8_API_35

✓ Expo runtime detected

→ tap 196 622

→ screenshot artifacts/home.png

RUNTIME.

003R&D / Developer tooling

Runtime Agent

A mobile automation CLI for inspecting, controlling and testing Expo and React Native applications on Android and iOS.

Device doctor and discovery
Tap, swipe, type and app lifecycle
Screenshots and cross-platform runtime

Node.jsCLIADBiOS SimulatorExpoAutomation

02 / More evidence

Visible
work.

A quick read of additional products, platforms and explorations that round out the case studies.

01HealthTech OS

AmblyoLab

Patients, laboratories, sessions, reports, research and Stimulus Studio.

02AI / Cloudflare

Agentic Inbox

Workers, Durable Objects, R2 and Email Routing for an intelligent inbox.

03Campus / Production

ECC Laundry

450+ users and approximately 3,500 bookings.

04Data / Mapping

Redmac

Mapping formal and informal retail with OSM, data pipelines and an analytics chatbot.

05B2B Marketplace

TengaMarket

Catalogs, orders and supplier operations for restaurants and hotels.

06Impact / Safety

SerraSafe

A safety and innovation initiative incubated by the Mastercard Foundation.

03 / Profile & stack

Profile,
stack and
experience.

I am Kossivi Hyacinthe Agbedjinou. I design complete products, not isolated layers.

Under Empereur-Dev, I work as a software engineer across web, mobile, cloud and AI products: architecture, interfaces, APIs, data, iOS/Android distribution and production operations.

2026 — Now

Software Engineer / WOBZ Technologies

Multi-tenant e-commerce SaaS and interactive 3D configurator.

2026 — Now

Product Engineer / Koora Lawal Group

End-to-end product design and delivery for Colibri.

2025 — 2026

Web Manager / SinamFor

Web product, SEO, performance, security and GDPR compliance.

2025

Full-Stack Developer / Recruit.AI

AI-powered HRTech platform built with Next.js and Spring Boot.

2024

Full-Stack Developer / Acmedias Holding SAS

Laravel/PostgreSQL SaaS CRM and API performance work.

MobileReact NativeExpoFlutterDartiOSAndroidFirebaseFirebase AuthFirestorePush notificationsStore releaseADB

Product WebAstroNext.jsReactVueLaravelTypeScriptJavaScriptHTML5CSSTailwind CSSGrapesJSMedusaJSShopify APIWordPress / CMSVercelSEO

SystemsNode.jsNestJSExpressSpring BootREST APIGraphQLPrismaPostgreSQLMySQLRedisFirebase AuthPythonPHPJavaHadoopMRJobKongWebhooks

InfrastructureDockerCoolifyCloudflareAWSAzureGoogle CloudSupabaseVercelMinIOOSRMUptime KumaNginxKubernetesGitHub ActionsLinuxDNSSSLSPFDKIMDMARCCloudflare WorkersR2Durable Objects

04 / Complete index