Skill Profile

Blockchain Fundamentals

Blockchain fundamentals: distributed ledger, hash chains, transactions, blocks

Blockchain & Web3 Blockchain Fundamentals

Roles

where this skill appears

Levels

structured growth path

Mandatory requirements

the other 4 optional

Blockchain & Web3

Blockchain Fundamentals

3/17/2026

Choose your current level and compare expectations. The items below show what to cover to advance to the next level.

What is Expected at Each Level

The table shows how skill depth grows from Junior to Principal. Click a row to see details.

Role	Required	Description
Blockchain Developer		Understands blockchain fundamentals: consensus mechanisms (PoW, PoS), block structure, Merkle trees, and P2P networking. Follows team patterns for interacting with blockchain nodes using RPC APIs and building basic dApps with Web3 libraries.
Smart Contract Developer		Understands blockchain fundamentals from smart contract perspective: EVM execution model, gas mechanics, transaction lifecycle, and state storage. Follows team patterns for deploying contracts to testnets and verifying on block explorers.

Role	Required	Description
Blockchain Developer		Independently develops with Blockchain Fundamentals in Hardhat/Foundry. Conducts basic audits. Optimizes gas.
Smart Contract Developer		Independently develops with Blockchain Fundamentals in Hardhat/Foundry/OpenZeppelin. Conducts basic audits. Optimizes gas.

Role	Required	Description
Blockchain Developer	Required	Designs blockchain architecture with deep understanding of consensus trade-offs, finality guarantees, and network topology optimization. Conducts protocol-level security analysis and implements custom node configurations. Mentors team on chain internals.
Smart Contract Developer	Required	Designs smart contract systems with deep understanding of EVM internals, storage layout optimization, and cross-contract interaction patterns. Conducts security audits using formal verification tools and static analysis. Mentors team on gas optimization.

Role	Required	Description
Blockchain Developer	Required	Defines blockchain product architecture: chain selection criteria, node infrastructure strategy, and protocol upgrade planning. Establishes security standards for validator operations and key management. Coordinates cross-team blockchain integration efforts.
Smart Contract Developer	Required	Defines smart contract architecture and security governance: audit processes, upgrade strategies (proxy patterns, diamond), and testing requirements. Establishes code review standards for Solidity/Vyper. Coordinates with auditors on security certification.

Role	Required	Description
Blockchain Developer	Required	Defines organizational blockchain strategy: multi-chain architecture, protocol contribution roadmap, and ecosystem partnerships. Evaluates emerging consensus mechanisms and L2 scaling solutions. Shapes company-wide blockchain technology vision.
Smart Contract Developer	Required	Defines organizational smart contract strategy: protocol design patterns, cross-chain interoperability standards, and security frameworks. Evaluates emerging EVM alternatives and ZK-proof integration approaches. Shapes enterprise blockchain development vision.

Junior 2 requirements

Blockchain Developer

Understands blockchain fundamentals: consensus mechanisms (PoW, PoS), block structure, Merkle trees, and P2P networking. Follows team patterns for interacting with blockchain nodes using RPC APIs and building basic dApps with Web3 libraries.
Smart Contract Developer

Understands blockchain fundamentals from smart contract perspective: EVM execution model, gas mechanics, transaction lifecycle, and state storage. Follows team patterns for deploying contracts to testnets and verifying on block explorers.

Middle 2 requirements

Blockchain Developer

Independently develops with Blockchain Fundamentals in Hardhat/Foundry. Conducts basic audits. Optimizes gas.
Smart Contract Developer

Independently develops with Blockchain Fundamentals in Hardhat/Foundry/OpenZeppelin. Conducts basic audits. Optimizes gas.

Senior 2 requirements

Blockchain Developer
Required

Designs blockchain architecture with deep understanding of consensus trade-offs, finality guarantees, and network topology optimization. Conducts protocol-level security analysis and implements custom node configurations. Mentors team on chain internals.
Smart Contract Developer
Required

Designs smart contract systems with deep understanding of EVM internals, storage layout optimization, and cross-contract interaction patterns. Conducts security audits using formal verification tools and static analysis. Mentors team on gas optimization.

Lead / Staff 2 requirements

Blockchain Developer
Required

Defines blockchain product architecture: chain selection criteria, node infrastructure strategy, and protocol upgrade planning. Establishes security standards for validator operations and key management. Coordinates cross-team blockchain integration efforts.
Smart Contract Developer
Required

Defines smart contract architecture and security governance: audit processes, upgrade strategies (proxy patterns, diamond), and testing requirements. Establishes code review standards for Solidity/Vyper. Coordinates with auditors on security certification.

Principal 2 requirements

Blockchain Developer
Required

Defines organizational blockchain strategy: multi-chain architecture, protocol contribution roadmap, and ecosystem partnerships. Evaluates emerging consensus mechanisms and L2 scaling solutions. Shapes company-wide blockchain technology vision.
Smart Contract Developer
Required

Defines organizational smart contract strategy: protocol design patterns, cross-chain interoperability standards, and security frameworks. Evaluates emerging EVM alternatives and ZK-proof integration approaches. Shapes enterprise blockchain development vision.

Loading comments...