Senior Full Stack Engineer - dApps London Improbable London Improbable

At Improbable, we believe that the next revolution in entertainment and society will come from massive virtual worlds. They will create new economies and opportunities globally, changing not just how we play, but how we work and relate to each other. That’s why we’ve made it our mission to build the next generation of technologies for online multi-user games and simulations.

At Improbable, you are surrounded by people who want to improve everything and everyone around them, and who compel you to improve yourself. We’re motivated by the fulfilment of solving hard problems to achieve something profound and transformative.

Improbable is a Venture Builder. We are working with leaders to create businesses in AI transformation, the metaverse and web3. We both create businesses from scratch and invest in existing businesses. Our central services teams work with ventures to help them achieve success; including early stage prototyping and initial product development where this role sits.

Your Mission

As a Principal Web3 Solidity Engineer at Improbable, you will work with web3 Ventures to help them get to market faster. You will work with their leadership team to design, prototype, and launch initial versions of their dApps. This is a hands-on, strategic role where you will collaborate with executives, working from identifying customer problems to shipping real dApps used in the community.

What You’ll Be Doing

• Architect, build, launch, and maintain dApps — from concept to community deployment
• Build on-chain logic in smart contracts, connecting them to web front-ends for both crypto natives and novices
• Work with business leads to define the product roadmap, help set the vision and strategy for the venture, and act as a sounding board for venture leadership
• Collaborate closely with the Somnia Blockchain team, providing product feedback to their developers

Why You’re Made For This

We seek an experienced Web3 Engineer with expertise in EVM-based smart contracts using Solidity, Web3 JS/TS libraries for contract interactions with frontend and backend systems, and experience creating and interacting with The Graph. You have strong hands-on skills with the blockchain development framework Foundry. You’ve shipped web applications built with TypeScript (preferably React, Next.js) and used wagmi hooks for smart contract integrations. You possess a deep understanding of blockchain architecture, token standards (ERC-20, ERC-721, ERC-1155), and non-standard implementations (e.g., USDC). You are knowledgeable about Solidity best practices and common security vulnerabilities. You thrive when solving complex, ambiguous problems and enjoy working across disciplines to find optimal solutions. You are passionate about the web3 community.

Optional Skills

• Experience using The Graph protocol to create Subgraphs or designing smart contracts for optimal indexability
• Experience in the DeFi ecosystem, particularly swapping protocols (e.g., Uniswap V2 or V3) and lending protocols (e.g., AAVE)
• Familiarity with Solidity fuzz testing, Slither, and Mithril
• Experience with the Hardhat testing framework

While the above experience is valuable, we welcome candidates who believe they can bring valuable skills to the role, even if they do not meet all requirements. If you resonate with our team and mission, please apply.