Senior Full Stack MERN Developer

Remote Leverage, a talent startup based in California, USA, is building and launching a **new, independent SaaS platform** backed by a proprietary talent dataset, and we’re hiring a **Senior Full Stack MERN Developer** to join as a **founding engineer** . This is a **remote role** focused on building a standalone product with external customers, real scale, and long\-term ambition — not client work and not internal tooling. **About the Product** We’re developing a proprietary software platform designed to transform how companies discover, evaluate, and hire remote talent at scale. The product already has a functioning MVP and early validation. Your role will be to **take it from “working” to production\-ready** — ensuring it is stable, scalable, secure, and polished enough for a public launch and real\-world usage. This is a hands\-on, execution\-heavy role with **significant ownership and influence over the product’s technical direction** . **What You’ll Be Responsible For** * Taking an existing MVP and bringing it to market\-ready, production quality * Designing and refining backend APIs and data models * Improving frontend UX, usability, and performance * Ensuring the system is stable, secure, and scalable * Identifying and resolving edge cases, bugs, and technical debt * Making pragmatic architectural decisions that support long\-term growth * Working closely with the founder to move fast while maintaining engineering discipline * Writing clean, maintainable, well\-structured TypeScript * Applying a product\-minded engineering approach, not just feature delivery * Thriving in an environment with ambiguity, iteration, and evolving requirements **Must\-Have Skills \& Experience** * **5\+ years** of professional experience as a Full Stack Developer or similar role * Strong experience with **TypeScript** across frontend and backend * Solid **React** experience building production\-grade user interfaces * Experience building **Node.js / Express APIs** * Experience working with **MongoDB** in production environments * Proven track record of **shipping and maintaining real\-world SaaS products** * Ability to move a product from **“it works” → reliable, scalable, and usable** * Strong product\-minded engineering mentality * Comfortable working without rigid specs and iterating quickly * **Fluent English** , written and verbal * Professional, collaborative, and proactive * Open to feedback and continuous improvement **This Role Is a Great Fit If You** * Enjoy taking ownership of real products from early stages * Like working close to founders and decision\-makers * Have shipped SaaS products before and know where MVPs tend to break * Care deeply about code quality, maintainability, and scalability * Want meaningful impact on a product with real market potential **Compensation** **USD 3000 to 4000 per month (** BRL 16,500 to 22,000\) We value **real\-world production experience** over polished portfolios. If you’ve built and shipped meaningful software — and can show it — we want to hear from you.