You will be a senior contributor within our smart contract engineering team, working closely alongside other engineers, product partners, and stakeholders to build the core systems that power high-value decentralized financial applications. This includes work on stablecoin systems, liquidity infrastructure, and broader DeFi protocols, among other emerging on-chain financial products.
You’ll design secure, scalable, and composable smart contracts used in production environments, help shape protocol architecture, and ensure a consistently high standard of security, reliability, and performance across everything the team delivers. You’ll collaborate deeply within the team to bring new on-chain ideas from concept through deployment and continuous improvement.
Key ResponsibilitiesProtocol Architecture & Technical Contributions- Contribute to the evolution of protocol architecture, contract design patterns, and security best practices
- Make thoughtful technical decisions around performance, composability, and risk
- Design, implement, and maintain advanced Solidity smart contracts using Foundry
- Build production-grade systems focused primarily on DeFi use cases and high-value financial logic
- Support deployment and lifecycle management across multiple networks
- Build comprehensive unit, integration, fuzzing, and fork testing suites
- Debug complex on-chain systems using traces, simulations, and low-level diagnostics
- Ship audit-ready, production-quality contracts that meet high security standards
Own and deliver end-to-end contract development work streams, including:
- Core protocol components and upgrades
- High-risk, security-sensitive financial logic
- Ongoing maintenance and improvements of deployed systems
- Work closely with Product and Backend engineering teams as an active team member to refine requirements and deliver outcomes
- Contribute to specifications, documentation, and team design discussions
- 4+ years of professional software engineering experience, with strong emphasis on prototyping and new product development
- 3-5+ years of Solidity development experience, with proven production delivery of audited smart contracts
- At least 2 mainnet deployments, ideally powering widely used or financially meaningful applications
- Extensive experience with EVM smart contracts and DeFi-centric development
- Strong proficiency with Foundry or similar frameworks
- Solid understanding of protocol mechanics, gas efficiency, performance, and security fundamentals
- Familiarity with common vulnerability classes and best-practice mitigations
- Proven ability to debug complex systems using traces and simulations
- Comfortable working collaboratively within a team in fast-moving and ambiguous environments
- Excellent written and verbal communication skills
- Experience participating in or responding to security audits; or writing audit-ready specs
- Experience working on stablecoin projects, with strong understanding of how pegs are designed and maintained; familiarity with other DeFi primitives such as lending or DEXs is a plus.
- Practical understanding of composability risks and protocol integrations
- Experience working on widely used protocols or infrastructure
- Startup or scale-up environment experience
East Asia preferred (Tokyo, Singapore, Hong Kong)
Top Skills
What We Do
Headquartered in Singapore, Startale Group is a global leader in Web3 infrastructure development. Our mission is to unleash the potential of humanity through the open internet. By onboarding the next billion users onchain, we are shaping the future of Web3.
The centerpiece of our efforts is Soneium, a next-generation Ethereum layer-2 blockchain, born from a joint venture with Sony Group. Soneium is designed to bridge the gap between blockchain (Web3) and traditional internet services (Web2), making blockchain technology more accessible and useful in everyday life. This collaboration seeks to establish Soneium as a core global infrastructure, advancing Web3 experiences for billions of users.
Startale Cloud Services offers comprehensive infrastructure to support developers, businesses, and individuals building and scaling Web3 applications. This platform is instrumental in accelerating the deployment and adoption of decentralized technologies across industries, laying the foundation for the future of Web3.
Astar Network connects you to web3. It is the gateway for projects across enterprises, entertainment & gaming in Japan and beyond, driving global adoption and delivering web3 to billions. Astar leverages a multi-layered tech stack powered by Polygon and Polkadot to offer customizable blockchain solutions that accelerate web3 adoption. With zk-powered Ethereum L2 Scaling (zkEVM), EVM, WASM, and a cutting-edge ecosystem, Astar delivers robust, secure, and interoperable web3 technology.
Through innovation, strategic partnerships, and collaboration with industry leaders like Sony Group, Startale Group continues to lead the charge in making blockchain technology a part of daily life for billions of people worldwide.
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