Layer 2 Solutions: Rollups, Sidechains

Understands L2 concepts: optimistic rollups (Optimism, Arbitrum) and zk-rollups (zkSync, StarkNet). Deploys L2 node on testnet and studies gas model and finality differences between L1 and L2.

Deploys contracts to L2 networks (Arbitrum, Optimism, zkSync). Understands differences in gas models and EVM compatibility. Tests on L2 testnets and compares deployment costs.

Configures and operates L2 nodes in production. Implements cross-layer messaging infrastructure (L1<->L2). Understands fraud proofs, validity proofs, and sequencer architecture.

Adapts contracts for L2 deployment: accounts for L1-data costs in gas calculation, L2-specific precompiles. Implements L1↔L2 contract messaging for deposit/withdrawal flows.

Designs multi-L2 infrastructure: shared sequencer, cross-L2 messaging, data availability layer. Optimizes calldata costs via EIP-4844 blob transactions. Analyzes sequencer centralization risks.

Designs cross-L2 contract architectures. Implements L2-native features and optimizes for L2-specific gas models. Analyzes security implications of sequencer centralization.

Defines L2 infrastructure strategy for the organization. Evaluates appchain vs shared rollup approaches for various products. Establishes cross-chain interoperability standards.

Defines L2 deployment strategy for the organization. Selects L2 for various contract use cases. Establishes L2 compatibility testing requirements and deployment automation.

Shapes enterprise vision of L2 scaling: L3, validium, volition approaches. Researches shared sequencing and based rollups. Publishes L2 infrastructure landscape analysis.

Defines enterprise L2 contract strategy. Researches appchains, L3, and custom execution environments. Shapes cross-L2 interoperability vision for smart contract platforms.