Blockchain Protocol & Infrastructure Engineering

LambdaClass provides comprehensive blockchain protocol engineering services, specializing in Layer 1 execution clients, Layer 2 rollup infrastructure, consensus mechanisms, and high-performance virtual machines. Their proven track record includes building production-grade systems that power major blockchain networks.

Core Capabilities

Execution Client Development: Full-featured blockchain execution engines with exceptional performance. LambdaClass built Ethrex, a Rust-based Ethereum execution client supporting both L1 and L2 networks, achieving a 20x performance improvement through systematic optimization. Ethrex has been integrated into Aligned's rollup infrastructure, demonstrating production readiness.

Consensus Client Implementation: Advanced consensus systems including post-quantum resistant implementations. Ethlambda is a minimalist Ethereum consensus client written in Lean 4 with Rust implementation, designed to remain secure against quantum computing threats through post-quantum cryptographic primitives and formal verification.

Virtual Machine Engineering: High-performance VM development for provable computation. CairoVM, their Rust implementation of the Cairo Virtual Machine, powers Starknet's sequencer and processes 30,000 to 220,000 Cairo steps per second. This VM executes provable programs and generates execution traces for STARK proof verification.

Layer 2 Rollup Infrastructure: Complete zkRollup and optimistic rollup development including sequencers, proving infrastructure, and execution environments. Demonstrated through 18+ months developing the Miden client and Ethrex integration for Aligned.

Technical Approach

Rust Implementation: All core infrastructure built in Rust for memory safety and C-level performance, preventing entire classes of vulnerabilities while maintaining high throughput.

Formal Verification Integration: Critical consensus components verified using Lean 4 to mathematically prove correctness, eliminating consensus bugs that could compromise network security or liveness.

Performance Engineering: Systematic profiling and optimization achieving order-of-magnitude improvements. The 20x Ethrex speedup demonstrates their methodical approach to performance.

Production Focus: Unlike academic prototypes, all systems are designed for production deployment. The Cairo VM's use in Starknet's sequencer and Ethrex's integration into Aligned prove reliability at scale.

Proven Track Record

• Starknet: Cairo VM powering production sequencer infrastructure
• Miden: 18+ months developing client for transaction execution and proving
• Aligned: Ethrex integration for rollup infrastructure, ZK security research
• Commit-Boost: Open-source validator sidecar used by 40% of Ethereum validators

Use Cases

• New Blockchain Protocol Development: Build complete L1 blockchain implementations from specification
• Layer 2 Rollup Launch: Develop zkRollup or optimistic rollup infrastructure end-to-end
• Execution Layer Optimization: Rebuild or optimize execution clients for performance gains
• Consensus Mechanism Innovation: Implement novel consensus protocols with formal verification
• Virtual Machine Development: Create custom VMs for specialized computation (zkVMs, provable computation)
• Protocol Upgrades: Implement major protocol changes or new features for existing chains

Engagement Model

LambdaClass becomes the core engineering team for blockchain infrastructure projects, taking full ownership of critical systems. They require on-site collaboration for deep technical work, maintaining teams in Buenos Aires, Montevideo, and Barcelona. This isn't staff augmentation—they become the technical foundation, often serving as the entire technology team for blockchain projects.

Ideal Client Profile

Blockchain projects requiring production-grade infrastructure with correctness guarantees, performance-critical systems handling significant value, and long-term technical partnerships. Best suited for teams willing to invest in formal verification for critical components and requiring systems with mathematical correctness guarantees.