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Yasindu Nethmina
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CASE STUDY

Ern

MY ROLE

Frontend and Web3 Product Engineering

Data Visualization

Wallet and Transaction Flows

API and Contract Integrations

CLIENT

Ern

YEAR

2025

TECH STACK
Next.jsTypeScriptTailwind CSSRechartsTanStack QueryWagmiRainbowKitViemAlchemy APIAave GraphQLZustandGSAP
OVERVIEW

Ern combined two connected surfaces: a marketing site that explained the product thesis clearly, and a dashboard where users could connect wallets, deposit stablecoins, track returns, and withdraw while seeing live BTC and yield data.

I worked across both surfaces, building the landing experience, simulator, performance views, FAQ and support sections, plus the dashboard flows for deposits, withdrawals, balances, claim handling, and transaction history.

A major part of the work was making a technical yield strategy feel legible through interactive comparisons, live price and APY feeds, and a cleaner on-chain user flow instead of a vague DeFi pitch page.

WHAT I OWNED
  • -Built the main product site across hero, APY stats, analytics, simulator, historical comparison, how-it-works, why-Ern, FAQ, and support surfaces.
  • -Implemented the dashboard experience for wallet connection, token selection, approvals, deposits, withdrawals, claim handling, balances, earnings cards, and responsive chart modules.
  • -Integrated live and historical data sources including Aave APY data, BTC price feeds via Alchemy-backed API routes, and yield-calculation logic used inside the simulator and comparison views.
  • -Built on-chain transaction history flows by fetching and watching deposit, withdraw, yield, and approval events, then surfacing them with explorer links and near real-time updates.
KEY OUTCOMES
  • -Delivered a clearer product journey from explanation to action by connecting the marketing site and dashboard into one coherent experience.
  • -Made the yield strategy easier to understand through simulator-driven comparisons, live BTC pricing, APY surfaces, and historical performance views.
  • -Shipped a usable on-chain dashboard around deposits, withdrawals, yield claims, and transaction history instead of stopping at a marketing-only frontend.

Product Walkthrough

Ern website and dashboard walkthrough video

Hero and Product Positioning

Ern hero section

Yield Simulator

Ern yield simulator

Historical Comparison Chart

Ern historical comparison chart

Historical Comparison Table

Ern historical comparison table

Dashboard and Deposit Flow

Ern dashboard and deposit flow

Why Ern

Ern why section

How It Works

Ern how it works section

FAQ and Support

Ern FAQ and support section

Footer and Resource Surfaces

Ern footer and resource links
SEE ALSO
NEXT PROJECT

Kem

Interactive fintech platform for cards and gold

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Ern Case Study | Yasindu Nethmina