Product Engineer (Singapore)

At Fun, we’re building the financial infrastructure for internet capital markets.

The systems that power global finance were designed for a different era: slower, fragmented, and constrained by borders. Today, value is digital, global, and moves instantly, but the experience of moving it hasn’t caught up.

Fun offers the highest converting payment solution in the digital asset space – a unified system that enables users to complete any on-chain action using crypto, exchange balances, or fiat from a card or bank account, all in a single, seamless flow.

Our goal is simple: make transacting with any asset feel effortless, anywhere in the world.

 

We're looking for a talented Product Engineer (Mid, Senior, Staff) to join our team and help shape the future of crypto payments. In this role, you'll design and scale SDK software that powers Checkout across web2 and web3 environments, working across the stack on systems that balance performance, reliability, and UX. You'll collaborate closely with protocol, backend, and business teams to solve complex challenges and build tools that scale globally to meet the evolving demands of on-chain payments. Crypto experience is a plus, but fast learners from any technical background are welcome.

3+ years of engineering experience with JavaScript, TypeScript, and modern frameworks

Strong understanding of full-stack development, including React and backend APIs

Attention to detail in both product design and user interaction

Proven track record building scalable, high-performance software

Familiarity with blockchain technologies and EVM-compatible networks

Comfortable solving difficult technical problems in agile environments

Experience working on payments, SDKs, or crypto-related systems

Passion for building secure, efficient, and accessible tools

You've contributed to open-source projects or built SDKs/dev tools

You have shipped products from 0 to 1 in a fast-paced setting

You thrive in ownership-heavy environments and pride yourself on execution

You approach problem-solving with thoughtfulness, precision, and rigor