Available for full-stack & product engineering opportunities

Komlan Kouhiko

Full-Stack Software Engineer | Product Engineering

I build SaaS, ecommerce, delivery-operations, and data/reporting products end to end — from requirements and data modeling through APIs, auth, payments, UI, testing, deployment, and production debugging.

Core stack

Next.jsTypeScriptSupabase/PostgreSQLREST APIsPlaywrightVitestClaude CodeOpenAI Codex
Portrait of Komlan Kouhiko, Full-Stack Software Engineer | Product Engineering

Featured Work

Selected Product Engineering Work

Selected full-stack products spanning rental SaaS, ecommerce/local delivery, delivery operations, and property management.

Screenshot of the Korent Multi-Tenant Event Rental SaaS interface Live

Korent

Multi-Tenant Event Rental SaaS

Built and hardened a multi-tenant rental platform spanning storefront checkout, inventory and availability, deposits/payments, customer and order workflows, PDF documents, delivery routing, and role-based dashboards.

Next.jsReactTypeScriptSupabase/PostgreSQLStripeZodjsPDFPlaywrightLeaflet
Screenshot of the Couranr Market Ecommerce & Local Delivery Platform interface Live

Couranr Market

Ecommerce & Local Delivery Platform

Built shopper, storefront, admin, delivery, and API surfaces for a direct-to-consumer commerce/local-delivery system, including checkout/payment flows, address and routing integrations, and automated test gates.

Next.jsReactTypeScriptSupabase/PostgreSQLStripeAnthropicResendZod
Screenshot of the Couranr OS Delivery Operations Platform interface Live

Couranr OS

Delivery Operations Platform

Built multi-role delivery workflows covering request intake, immutable quote versions, payment obligations, service plans, dispatch, driver execution, tracking/proof, returns/refunds, and operations review.

Next.jsReactTypeScriptSupabase/PostgreSQLStripeResendAnthropicRelease/Test Gates
Screenshot of the Crecy OS Property Management Operating System interface Live

Crecy OS

Property Management Operating System

Built a multi-role property-management platform for operators, residents, owners, and invited vendors, with portfolio/import workflows, leases, rent generation, payments, reconciliation, maintenance, and operational controls.

Next.jsReactTypeScriptSupabase/PostgreSQLStripeRLSPayments/ReconciliationAutomated Testing

Additional portfolio

More shipped products and client-facing work

View full work →

AI-integrated service-business SaaS, trialed with 14 active users.

Fleet-management SaaS with operational dashboards and an AI Copilot.

Couranr.com

Customer-facing same-day and business delivery experience backed by multi-role delivery operations.

Capabilities

What I Build

The product and engineering areas reflected in my current portfolio and resume.

SaaS & Operations Platforms

Multi-role products with auth, permissions, billing, dashboards, and operational workflows.

Ecommerce & Checkout

Storefront, pricing, inventory, payments, order finalization, and customer-facing flows.

Delivery Operations

Request intake, quoting, dispatch, driver execution, proof, tracking, and review workflows.

Data & Reporting Portals

Role-scoped dashboards that turn structured data into trends, visualizations, APIs, and PDFs.

AI-Assisted Workflows

Anthropic/OpenAI integrations with guardrails, human review, and deterministic business logic where correctness matters.

Quality & Production Hardening

Regression testing, test gates, monitoring, root-cause analysis, security review, and production debugging.

Toolbox

Technical Stack

The technologies and engineering practices I use across my current portfolio.

Frontend & Application

Next.jsReactTypeScriptJavaScriptResponsive UI

Backend, Data & Auth

SupabasePostgreSQLMongoDBREST/JSON APIsRLSAuth/Roles

Quality & Delivery

PlaywrightVitestZodSentryGitHubVercel CI/CD

Payments & Integrations

StripeResendGoogle APIsMapbox APIs

AI & Developer Tooling

Anthropic/OpenAI APIsClaude CodeOpenAI CodexPrompt Guardrails

Want to review my resume or see the code behind my work?

I'm open to SaaS builds, AI integrations, and full-stack contract work. Let's talk.