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The Web Engineer is the technical owner of KAST's public web presence. The role brings our marketing web stack fully in-house, migrating the site from Webflow to Next.js + Sanity and owning it long-term — architecture, build, integrations, SEO, performance, and day-to-day operations.
This role is for builders, people who take initiative, think in systems, and care deeply about doing great work. If you’re excited about working at the intersection of technology, execution, and impact, you’ll feel right at home at KAST.
- Application Deadline
- July 31, 2026
- Department
- Engineering
- Employment Type
- Full Time
- Location
- Singapore
- Workplace type
- Hybrid
What You’ll Be Doing
- Build and own the new Next.js + Sanity site, including a template system that lets Marketing and Content publish without dev support.
- Lead the Webflow → Sanity migration without breaking URLs, SEO equity, or analytics.
- Ship campaign and product landing pages from Figma to production — build, QA, deploy, monitor.
- Operate the web infrastructure: DNS, SSL, redirects, Cloudflare, and edge Workers.
- Integrate the site with third-party systems (FX/currency API, lead capture, Pinpoint ATS, CRM, analytics).
- Own SEO, Core Web Vitals, accessibility (WCAG AA), and analytics.
- Run the website intake queue and keep stakeholders aligned across time zones.
- Own reliability: uptime, monitoring, and launch-day fixes.
What You'll Bring
- Strong production experience with Next.js / React.
- Hands-on with a headless CMS, Sanity strongly preferred (schemas, editor experience, publishing).
- Track record migrating marketing sites without losing SEO, URLs, or analytics.
- Solid web infrastructure skills: DNS, SSL, redirects, CDN, Cloudflare, edge Workers.
- Ability to build lightweight back-end integrations (route handlers, serverless functions, webhooks).
- Strong technical SEO, performance, and accessibility (WCAG AA) knowledge.
- Self-directed operator who can own a site solo and ship fast across distributed time zones.
Nice to have
- Experience in fintech, crypto, or stablecoin/neobank products.
About KAST
KAST is redefining stablecoin banking for global citizens, crypto professionals, Web3-native businesses, and high-inflation markets hungry for USD-backed banking. Backed by top-tier global investors and led by the ex-APAC CEO of Circle, our leadership team spans Circle, Airwallex, Revolut, Wise, Grab, Zoom, AWS, and leading OTC desks. We’ve scaled from zero to nearly a million users at ridiculous speed.
Apply Now
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What does a React developer in web3 do?
A React developer in the context of web3 is a developer who is using the React JavaScript library to build user interfaces for decentralized applications (dApps) that run on the Ethereum blockchain
These dApps often use smart contracts to facilitate transactions and other interactions on the Ethereum network
Overall, the role of a React developer in web3 involves using your skills in React development to help build cutting-edge decentralized applications that leverage the power of the Ethereum blockchain
As a React developer in web3, some of your responsibilities might include:
- Integrating the dApp with the Ethereum blockchain. This might involve using tools like web3.js and Ethers.js to connect to the Ethereum network and interact with smart contracts.
- Building the user interface for a dApp using React. This could involve creating components for the various elements of the dApp, such as buttons, forms, and other input elements.
- Implementing features that are specific to decentralized applications, such as handling cryptocurrency transactions and displaying data from the blockchain in a user-friendly way.
- Collaborating with other members of the development team, such as blockchain engineers and designers, to ensure that the dApp functions properly and meets the needs of the end users.