Full-Stack Engineer — KEO World (via Remotesome)

About KEO World

Founded in 2020, KEO World (KEO) is an innovative FinTech helping Buyers and Suppliers accelerate business growth through all-digital B2B payment and inventory financing solutions.

Headquartered in Miami, Florida, KEO operates in the U.S., Mexico and across LATAM. KEO’s product offerings are designed to:

• Boost purchasing power

• Increase working capital

• Optimize cross-border payments

About the Role

We are looking for a talented and experienced Full-Stack Engineer to join our remote team. In this role, you’ll design, build, and maintain robust web and mobile features across the stack, with an emphasis on delivering high-quality and scalable solutions. You will work extensively with TypeScript, Node.js, React, and React Native, leveraging your expertise to integrate APIs and external services, all while optimizing for performance and reliability.

Key Responsibilities

• Design, build, and maintain scalable web and mobile product features across the stack.

• Develop and maintain backend APIs using Node.js and TypeScript.

• Create polished user interfaces using React (web) and React Native (mobile).

• Integrate third-party services (e.g., payment processors, KYC, analytics).

• Work with PostgreSQL, applying relational data modeling best practices.

• Communicate proactively and work independently in a remote, distributed team.

• (Optional) Contribute to blockchain-related features and integrations as needed.

Required Skills & Experience

• 5+ years of hands-on, full-stack development experience.

• Advanced proficiency in TypeScript across the stack.

• Strong production experience with:

  • React (web)

  • React Native (iOS & Android)

  • Node.js and backend API development

• Solid knowledge of relational databases, especially PostgreSQL.

• Proven ability to integrate and manage third-party APIs and external services.

• Self-starter: Able to work independently, manage time well, and take initiative.

• Clear and effective communication skills (written and verbal).

Nice to Have

• Experience in fintech (payments, BNPL, wallets, compliance).

• Familiarity with blockchain integrations (wallets, smart contracts, ethers.js, web3.js).

• Experience with Next.js and server-side rendering.

• Understanding of app performance optimization and OTA updates (e.g., CodePush).

• Experience working in agile, product-led environments.

• Security-conscious development practices (e.g., KYC/AML, secure data storage).

Success Criteria

• Rapid ramp-up on the existing stack and product.

• Independent delivery of high-quality, scalable product features.

• Effective collaboration and proactive communication within a remote team.

• Continuous improvement of codebases through clean, modular, and well-tested code.

Required Skills

• React Native — Advanced
• React — Advanced
• Node.js — Advanced
• RESTful — Advanced
• GraphQL — Advanced
• PostgreSQL — Advanced

Benefits

• Fully Remote

Compensation

$50K – $70K/year

Timezone: UTC-8 to UTC-3