Senior Fullstack Developer

Kiwi Remote 1 day ago

engineering

We are looking for a Full Stack Developer with strong experience in modern web technologies, capable of building scalable, reliable, and high-performance applications. This role will be key in designing, developing, and maintaining solutions that directly impact our customers and business growth.

Responsibilities

Design, develop, and maintain web applications using React.js, TypeScript, Node.js, and Express.js.
Build and optimize RESTful APIs and integrations with internal and external services.
Work with PostgreSQL databases, designing efficient queries and ensuring data integrity.
Collaborate closely with Product, UX/UI, and QA teams to deliver high-quality features.
Ensure code quality through reviews, automated testing (Jest, Cypress, Playwright), and best practices.
Contribute to improving application performance, scalability, and reliability.
Participate actively in Agile ceremonies (daily standups, sprint planning, retrospectives).

Requirements

5+ years of professional experience in software development.
Solid knowledge of JavaScript/TypeScript.
Experience with React.js and modern front-end development (hooks, state management, UI libraries such as Tailwind or Material UI).
Strong background in Node.js with Express.js for backend development.
Hands-on experience with PostgreSQL or other relational databases.
Familiarity with REST APIs and good practices for design and security.
Experience with Git, CI/CD pipelines, and Agile methodologies.
Strong problem-solving, teamwork, and communication skills.

Nice to have

Experience with testing frameworks (Jest, Cypress, Playwright).
Familiarity with AWS (Lambda, API Gateway, S3, CloudWatch).
Previous experience in fintech or building digital financial products.

What we offer

Opportunity to contribute to innovative products that directly impact users and the company’s growth.
A dynamic and collaborative environment, working with a multidisciplinary team.
Professional growth in a rapidly expanding fintech.
Work mode: 100% remote – Colombia or Argentina.