What does a Web3 developer do?

A Web3 developer builds decentralised application (dApp) frontends that interact with blockchain smart contracts. This includes wallet connection interfaces, token swap UIs, NFT marketplace frontends, DeFi dashboards, and on-chain data visualisation. Aleksandar specialises in the frontend layer — building fast, accessible Web3 interfaces with Next.js and React.

Why hire a frontend developer for Web3 projects?

Most Web3 projects fail not because of the smart contracts, but because of poor user experience. A skilled frontend developer makes blockchain interactions feel seamless — handling wallet connections, transaction states, error messages, and loading states that make users trust and enjoy the dApp. Aleksandar brings 12+ years of frontend expertise to Web3 projects.

What Web3 technologies does Aleksandar work with?

Aleksandar builds Web3 frontends with Next.js, React, TypeScript, ethers.js, wagmi, viem, and RainbowKit. He integrates with Ethereum, Polygon, and EVM-compatible chains, connecting to smart contracts via ABI interfaces and building responsive, performant dApp UIs.

Web3 Development

Hire a Web3 Developer.
dApp frontends. Wallet UX. On-chain.

Looking to hire a Web3 developer? I'm Aleksandar Kuzmanovic — a full-stack developer who builds Web3 frontend interfaces with Next.js, React, and TypeScript. I specialise in the user-facing layer of decentralised applications — making blockchain interactions feel as seamless as traditional web apps.

Whether you need a dApp frontend, NFT marketplace interface, DeFi dashboard, or token management UI — I deliver fast, accessible Web3 interfaces that handle wallet connections, transaction flows, and on-chain data with polished UX. Your users shouldn't have to think about the blockchain underneath.

Web3 user experience is the bottleneck for mainstream adoption. Complex wallet connections, confusing transaction states, and cryptic error messages drive users away. I build Web3 frontends that abstract this complexity — intuitive wallet onboarding, clear transaction progress, human-readable errors, and responsive interfaces that work on mobile devices.

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TL;DR

12+Years experienceProgramming

Next.jsFrameworkSSR for Web3 SEO

100PerformanceLighthouse scores

Full-StackCapabilityFrontend + Backend

What I Deliver

Services & deliverables.
End-to-end.

dApp Frontend Interfaces

Polished decentralised application frontends with wallet connection, transaction flows, on-chain data display, and responsive design. Web3 interactions that feel as smooth as Web2.

NFT Marketplace Frontends

NFT browsing, minting interfaces, auction systems, collection galleries, and wallet-based ownership verification. Visually rich NFT experiences with fast load times.

DeFi Dashboard & Trading UI

Token swap interfaces, liquidity pool dashboards, yield farming UIs, and portfolio tracking. Real-time price updates, transaction history, and position management.

Token & DAO Interfaces

Token management dashboards, governance voting interfaces, staking UIs, and airdrop claim pages. Clean interfaces for community engagement and token utility.

Wallet Integration & Onboarding

MetaMask, WalletConnect, Coinbase Wallet, and Rainbow integration with RainbowKit. Smooth wallet connection flows that onboard non-crypto-native users.

On-Chain Analytics & Data Viz

Protocol analytics dashboards, whale watching tools, and blockchain data visualisation using The Graph, custom indexers, and direct RPC queries.

Why Choose Me

Why hire me for Web3 frontend development?

dApp Frontend Engineering

I build dApp interfaces that abstract blockchain complexity — smooth wallet connections, real-time transaction states, error recovery flows, and loading UX that keeps users engaged through on-chain operations.

Next.js for Web3 SEO

Most dApps are invisible to search engines. I build Web3 frontends with Next.js server-side rendering — your dApp gets indexed by Google, ranks in search results, and attracts organic traffic alongside Web3-native users.

Wallet & Smart Contract Integration

Seamless integration with MetaMask, WalletConnect, Coinbase Wallet, and others using wagmi, viem, and ethers.js. Clean ABI interfaces, multicall batching, and efficient RPC usage.

Performance-First Web3 UI

Web3 frontends are notoriously slow. I build optimised dApps with code splitting, efficient state management, and minimal bundle sizes — fast even on mobile devices with slow connections.

On-Chain Data & Analytics

Real-time on-chain data visualisation using The Graph, custom indexers, and RPC providers. Token balances, transaction histories, protocol analytics, and portfolio dashboards with live updates.

Multi-Chain Support

Ethereum, Polygon, Arbitrum, Optimism, and other EVM-compatible chains. Network switching, multi-chain asset display, and cross-chain functionality with chain-agnostic architecture.

How It Works

My process.
Simple. Transparent.

Web3 Requirements

Define which chains, contracts, and wallet providers your dApp needs. Map user flows for wallet connection, transactions, and error scenarios.

Architecture & Smart Contract Integration

ABI interface design, RPC provider selection, indexer configuration (The Graph), and frontend architecture with Next.js for SEO and performance.

Frontend Development

Component-driven dApp development with React, TypeScript, wagmi, and viem. Wallet connection, transaction state management, and on-chain data fetching.

UX Polish & Error Handling

Transaction loading states, confirmation flows, error recovery, network switching, and mobile responsiveness. The UX layer that makes or breaks a dApp.

Testing & Deployment

Testnet verification, mainnet deployment, wallet compatibility testing, and cross-chain validation. Production-ready dApps that handle edge cases gracefully.

Technology Stack

Next.jsReactTypeScriptethers.jswagmiviemRainbowKitEthereumPolygonEVMTailwindCSSNode.jsGraphQLThe Graph

In Depth

Web3 frontend: where UX meets blockchain.

The blockchain industry has a user experience problem. Smart contracts may be technically brilliant, but if the frontend is confusing, slow, or unreliable, users leave. The gap between smart contract capability and user interface quality is where most Web3 projects fail — and where skilled frontend development creates the most value.

Web3 frontend development requires a unique skill set that combines traditional web development expertise with blockchain-specific knowledge. Wallet connection flows, transaction state management, gas estimation, chain switching, and ABI-based contract interaction all need careful UX consideration. Aleksandar brings 12+ years of frontend engineering experience to these Web3-specific challenges.

Server-side rendering with Next.js gives Web3 projects a significant competitive advantage. Most dApps are client-only JavaScript applications that are completely invisible to search engines. A Next.js-powered dApp gets indexed by Google, appears in search results, and attracts organic traffic — a marketing channel that most competitors completely ignore.

Performance is especially critical in Web3 frontends. Users interact with dApps on mobile phones with slower connections, and every interaction potentially costs real money (gas fees). Slow, unresponsive interfaces erode the trust needed for financial transactions. Aleksandar builds optimised Web3 frontends with minimal bundle sizes, efficient RPC usage, and multicall batching.

The Web3 technology landscape evolves rapidly. From ethers.js to viem, from individual wallet SDKs to RainbowKit, and from direct RPC calls to The Graph indexing — choosing the right tools matters. Aleksandar stays current with the Web3 frontend ecosystem, using production-proven libraries that balance developer experience with reliability.

FAQ

Common questions.
Clear answers.

What does a Web3 developer do?: Builds dApp frontends that interact with smart contracts — wallet connections, token UIs, NFT marketplaces, DeFi dashboards, and on-chain data visualisation. Aleksandar specialises in the frontend layer.
Why hire a frontend developer for Web3 projects?: Most dApps fail because of poor UX, not bad smart contracts. A frontend expert makes wallet connections, transactions, and errors feel seamless — building trust and engagement.
What Web3 technologies does Aleksandar work with?: Next.js, React, TypeScript, ethers.js, wagmi, viem, RainbowKit. Integrates with Ethereum, Polygon, and EVM chains via ABI interfaces.
Can Web3 sites rank on Google?: Yes — with server-side rendering. Most dApps are client-only and invisible to search engines. Aleksandar builds Next.js Web3 frontends that get indexed and rank in Google results.
Do you write smart contracts?: Aleksandar specialises in Web3 frontend development — the UI layer that interacts with smart contracts. He can connect to any smart contract via ABI, build transaction interfaces, and display on-chain data. For Solidity development, he can recommend specialist partners.
What chains do you support?: All EVM-compatible chains: Ethereum, Polygon, Arbitrum, Optimism, Base, BNB Chain, and others. Chain-agnostic architecture with wagmi and viem enables easy multi-chain support.
How do you handle Web3 errors and failed transactions?: Aleksandar builds comprehensive error handling for Web3 interactions: wallet disconnections, rejected transactions, gas estimation failures, RPC errors, and chain switching. Clear, human-readable error messages give users confidence rather than confusion.

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Hire a Web3 Developer.dApp frontends. Wallet UX. On-chain.

Services & deliverables.End-to-end.