I'm a hands-on blockchain engineer and technical builder working across crypto infrastructure, wallets, DeFi, smart contracts, distributed systems, AI agents, and privacy-preserving protocols.

I like systems where correctness, security, reliability, and developer experience matter. Most of my recent work sits around crypto-native infrastructure: protocol integrations, self-custodial wallets, smart accounts, account abstraction, L2s, cross-chain systems, on-chain execution, and developer tooling.

I also spend a lot of time experimenting with AI-assisted engineering, autonomous agents, ZK, cryptography, and market-structure ideas.

• Blockchain infrastructure: protocol integrations, wallets, signing flows, indexers, transaction pipelines, custody-adjacent systems
• Ethereum / EVM: Solidity, smart contracts, account abstraction, ERC-4337, ERC-7579, ERC-7702, EVM internals
• Wallets: self-custody, smart wallets, MPC wallets, recovery, signing UX, on-chain execution
• DeFi and markets: DEXs, derivatives, options, arbitrage, prediction markets, on-chain trading systems
• ZK and privacy: Noir, Circom, Cairo, Aztec, zkTLS, circuits, nullifiers, FHE, MPC, lattice crypto
• Distributed systems: event-driven backends, Kafka, Kubernetes, Terraform, AWS, observability, production reliability
• AI engineering: AI agents, agentic coding workflows, autonomous research loops, LLM experiments, AI-assisted product development
• Product engineering: Next.js, React, React Native, Expo, TypeScript, Tailwind, mobile apps, SDKs, APIs

Rust        TypeScript       Solidity       Go          Python
Node.js     React / Next.js   React Native   Expo        Tailwind
Kafka       Kubernetes        Terraform      AWS         Docker
Noir        Circom            Cairo          Foundry     Ethers / Alloy

• Secure wallet infrastructure
• Smart account systems and account abstraction experiments
• Protocol integrations that do not fall over in production
• Clean APIs and SDKs for complex crypto systems
• ZK and privacy experiments with real-world use cases
• On-chain trading, arbitrage, and market-structure tools
• AI agents that help build, test, research, or automate software
• Mobile and web products that ship fast but still feel polished

• ERC-4337, ERC-7579, ERC-7702 and smart wallet architecture
• AI wallets and autonomous on-chain agents
• Privacy-preserving DeFi
• zkTLS, nullifiers, age verification circuits, and circuit-as-a-service ideas
• FHE, MPC, BLS signatures, lattice cryptography, and applied crypto
• Hyperliquid / Kraken arbitrage, derivatives, options, and prediction markets
• Autonomous AI research loops for LLM training experiments
• React Native / Expo apps with local-first storage, subscriptions, notifications, and native capabilities

• Blockchain platforms: built and led on-chain infrastructure processing activity across dozens of protocols, covering deposits, withdrawals, protocol integrations, wallets, and data pipelines.
• Wallets: led engineering on self-custodial and smart wallet infrastructure, SDK architecture, multi-chain wallet systems, and open-source wallet tooling.
• Cross-chain DeFi: led engineering for a cross-chain DeFi wallet and trading platform, including swaps, staking, DEX aggregation, and node infrastructure.
• High-scale product platforms: worked on search, personalization, recommendations, experimentation, reinforcement learning, and ML-driven systems.

I stay close to the code because it improves my judgment.

I care about clear architecture, simple abstractions, fast feedback loops, low bureaucracy, strong ownership, and systems that are understandable enough to debug when they break.

I enjoy switching between architecture, implementation, product thinking, security review, and technical exploration.

• GitHub: https://github.com/eitjuh

If you're building something technically ambitious in crypto, wallets, privacy, DeFi, trading, AI agents, or developer infrastructure, feel free to reach out.