1143 - Senior Full-Stack Software Engineer

Location: Remote

Department: Information Technology

We need an English-fluent Senior Full-Stack Software Engineer, based in Latin America, available to work remotely.

We are looking for someone with exceptional communication and relationship-building skills, who embraces changes while maintaining strong attention to detail. An interested and proactive person, whos constantly learning and improving their skills.

Are you the one we are looking for?

Responsibilities:

• Design and develop scalable, responsive web applications using React, TypeScript, and Next.js or Vite.js.

• Build and maintain backend services and APIs using Node.js and NestJS.

• Develop reusable, maintainable frontend components and application architecture.

• Integrate APIs, databases, third-party services, and blockchain technologies.

• Work with product, design, and engineering teams to deliver user-focused features.

• Optimize application performance, scalability, and developer experience.

• Implement responsive and mobile-first interfaces using modern CSS frameworks.

• Integrate and interact with Web3 wallets, smart contracts, and blockchain infrastructure.

• Participate in code reviews, technical discussions, testing, and continuous improvement.

• Troubleshoot technical issues across frontend and backend systems.

Requirements:

• 5+ years of professional software/web development experience.

• Strong proficiency in React and TypeScript.

• Strong JavaScript fundamentals.

• Professional experience with Node.js and preferably NestJS.

• Experience building REST APIs and integrating backend services.

• Experience working with PostgreSQL or another relational database.

• Experience with an ORM such as Prisma.

• Strong understanding of frontend state management and data-fetching patterns.

• Experience with responsive UI development and modern component libraries.

• Experience with Git and modern software development practices.

• Ability to work effectively with cross-functional and distributed teams.

Its a plus:

• Professional experience developing Web3 applications or DeFi platforms.

• Experience integrating cryptocurrency wallets and blockchain networks.

• Familiarity with Wagmi, Ethers.js, Web3Auth, LiFi, or similar technologies.

• Experience interacting with smart contracts.

• Understanding of blockchain transactions, wallet connections, and decentralized applications.

• Experience migrating applications between frameworks or build tools.

• Experience developing reusable component libraries or NPM packages.

• Experience with real-time data and cloud functions.

• Experience with financial applications, digital wallets, exchanges, or trading platforms.

• Experience mentoring junior developers or conducting technical training.

Compensation:

• The salary range offered for this position varies from (USD) $3,000 - $3,200 per month, depending on seniority and skillset.

• This position is for a full time contract, through a payroll platform.

• The talent will work remotely allocated at our client.

Here are the steps for this process:

Application review/approval > Screening interview with GoFastis team > We build and send your profile to our client > Profile review/approval by client > Interview with the client > Hiring and onboarding.