Founding Full-Stack Product Engineer — Fintech / Payments

Company Description Handl is revolutionising the infrastructure for internet-native businesses by providing a unified platform for creators and digital founders to launch, monetise, and scale their ventures. By combining payments, tax compliance, merchant-of-record structures, affiliate distribution, and revenue sharing, Handl offers a scalable solution tailored to modern digital companies. Operating globally and powering live transactions, Handl is designed to simplify complexity, enhance margins, and unlock new opportunities in the digital economy. Just as Shopify transformed e-commerce and Stripe redefined online payments, Handl is poised to become the foundational operating system for digital brands. This is a full-time role for a Founding Full-Stack Product Engineer. Tax calculation/compliance CRM/order management Payment/payout rails KYC/KYB and identity verification We need someone who can create the user facing product: the user interface, onboarding flows, dashboards, settings, merchant account setup, API/OAuth connection flows and data views. This role is ideal for a strong full-stack product engineer who can take a prototype and turn it into a clean, scalable SaaS application. What You'll Be Building You will help build the first live version 1.0, including: Company/account setup KYC/KYB flow Tax/compliance status views CRM/order data views Payment orchestration data Payout/payment rail data Tax calculation/status data Basic internal backend/database structure Frontend Databases Clean UI/UX You do not need to be a specialist in payments infrastructure, but experience with fintech, payment platforms, SaaS dashboards, marketplaces, CRMs, affiliate platforms, or financial admin tools would be a big advantage. Strong experience building SaaS platforms or web apps Strong frontend skills Good UI/UX judgment Experience building dashboards and admin panels React / Next.js Tailwind CSS js / Express / NestJS PostgreSQL / Supabase Vercel / Railway / Render / AWS Fintech dashboards KYC/KYB flows Tax/compliance integrations CRM integrations Defined commercial model Creating a proper frontend structure Building the main dashboard layout Building merchant onboarding Building login/account setup Setting up database structure Examples of SaaS dashboards or web apps you have built Your recommended tech stack for this project Whether you are stronger in frontend, backend, or full-stack Any relevant fintech, payment, marketplace, CRM, or compliance experience