Smart Contract Engineer

JR United Kingdom; Slough; On-site; GBP 60,000 - 90,000; Full time

Job summary

An innovative startup in the blockchain and gaming sector is seeking a Smart Contract Engineer to architect core functionalities. Join a compact senior team in a decentralised platform environment, contributing to secure contracts and participating in cutting-edge blockchain development. Ideal for those passionate about transforming online gaming through blockchain technology.

Qualifications

• 2+ years of experience in smart contract development.
• Strong grasp of blockchain mechanics and gas optimization.
• Eagerness to learn new platforms like TON.

Responsibilities

• Design and develop smart contracts using TACT or equivalent languages.
• Ensure contracts are modular, secure, and upgradeable.
• Maintain smart contract interfaces and collaborate with teams.

Skills

Smart Contract Development

Blockchain Fundamentals

Security Best Practices

Modular System Design

Tools

Solidity

Rust

TACT

Move

Job description

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Our client — an innovative startup at the intersection of blockchain and gaming — is building a decentralised platform powered by the TON blockchain. They’re looking for a Smart Contract Engineer (or an experienced backend engineer eager to move into Web3) to help architect and implement core smart contract functionality. The role is ideal for someone who enjoys working on secure, modular contracts, particularly for RNG-based game logic, asset tracking, and value transfer mechanisms. You’ll collaborate closely with DevOps and backend engineers in a modern serverless stack, with exposure to TACT, Solidity, Rust, and Move.

About the Company:

Our client is a well-funded Web3 venture backed by leaders in gaming and crypto. Their mission is to redefine the online gambling experience by integrating cutting-edge blockchain infrastructure with scalable, user-focused products. You’ll be joining a compact, senior team with the freedom to influence technical direction and contribute directly to a rapidly evolving space.

Key Responsibilities:

• Design and develop smart contracts using TACT or equivalent languages like Solidity, Rust, or Move
• Ensure contracts are modular, secure, upgradeable, and deterministic
• Maintain smart contract interfaces and collaborate across frontend/backend functions
• Support testnets, write comprehensive test coverage, and work with audit partners
• Translate product logic into robust on-chain systems

Requirements:

• 2+ years of smart contract development (e.g., Solidity, Rust, Cairo, Move)
• Strong grasp of blockchain fundamentals — including gas optimization, on-chain/off-chain patterns, and consensus mechanisms
• Experience designing modular, event-driven systems with upgrade paths
• Sound understanding of security best practices in smart contract development
• Eagerness to learn new blockchain platforms, especially TON and TACT

Bonus Points:

• Background in gaming logic, lotteries, or staking mechanisms
• Open-source contributions to Web3 projects (DeFi, NFT, etc.)
• Prior hands-on work with TON, TACT, or related tooling