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

Kraken
Built and led Kraken's Blockchain Platform, processing on-chain activity across 70+ protocols. Worked across deposits, withdrawals, protocol integrations, wallets, data pipelines, and production blockchain infrastructure.

Also led engineering for Kraken's Onchain Business Unit, contributing to Kraken Wallet, kBTC, Ink, smart wallet infrastructure, DeFi primitives, account abstraction, and on-chain UX.

Tether
Led wallet engineering and product initiatives, including self-custodial wallet infrastructure, SDK architecture, multi-chain wallet systems, peer-to-peer foundations, and open-source wallet tooling.

Ignite / Tendermint
Led engineering for Emeris, a cross-chain DeFi wallet and trading platform for Cosmos. Worked on IBC-powered swaps, staking, DEX aggregation, multi-chain asset management, Cosmos SDK integrations, and running node infrastructure.

Booking.com / IKEA
Worked on high-scale product platforms, 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.

• Website: https://eitjuh.com
• LinkedIn: https://www.linkedin.com/in/jesseeilers
• 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.