Full-Stack Engineer for Fintech Product

We’re hiring a full-stack engineer to rebuild our email module for a live fintech product at investoai.com. This is a 4-week paid contract with potential for long-term work if the engagement goes well. You should have shipped consumer products end-to-end and integrated third-party APIs, with OAuth experience being a plus. To apply, start with the word EMERALD, share a live product you personally built, and explain how many days you would need to ship a referral system with invite links, Stripe coupons, and webhook rewards.