Calling All Upstarters!

SENIOR FULL-STACK ENGINEER WANTED!

We are Upstart 13. We are humble, hungry, and competent people who are radically changing the expectations and experience of outsourcing for all participants by challenging barriers that create inequality and by bringing down borders in technology for people everywhere. We’re all about delivering value and doing big things. We have become a game-changer for teams around the world who look to Upstart’s services as a differentiator.

Job Description:

We’re looking for a Senior Full Stack Software Engineer located in Latin America, who can take ownership of both frontend and backend components of our AI-powered platform. You’ll play a key role in developing intuitive user interfaces and integrating with mission-critical backend APIs, including those for payments, smart access control systems, and platforms like Airbnb. Your work will directly impact the scalability, reliability, and maintainability of our core products.

Responsibilities:   

• Design and build responsive, high-performance user interfaces using React.js or Next.js, ensuring seamless user experiences across devices and browsers.
• Architect and implement robust backend services and RESTful APIs using Python (preferred) or Node.js, with a focus on scalability, security, and maintainability.
• Integrate third-party services and components such as Auth0, Stripe, and Hosted Pages, ensuring smooth interoperability and secure data exchange.
• Write clean, modular, and well-documented code with comprehensive unit and integration test coverage to support long-term maintainability.
• Collaborate closely with cross-functional teams—including product managers, designers, and fellow engineers—to translate business requirements into technical solutions.
• Take ownership of system architecture decisions, championing best practices in software design, performance optimization, and code quality.

Qualifications

Experience:

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related technical discipline.
• Minimum of 6 years of hands-on experience in full-stack development.
• Advanced proficiency in React.js or Next.js, including SSR (Server-Side Rendering), SSG (Static Site Generation), and API Routes.
• Solid experience with TypeScript and modern frontend tooling (e.g., Tailwind CSS, CSS-in-JS, dynamic theming).
• Proven expertise in state management libraries such as Zustand and React Query.
• Strong backend development experience using Python frameworks (Django, Flask, FastAPI); familiarity with Node.js is a plus.
• Demonstrated ability to design and implement scalable software systems with a focus on performance and reliability.
• Excellent debugging, documentation, and testing practices, including familiarity with automated testing frameworks.

Soft skills:

• Excellent communication and collaboration skills with a desire to learn and teach.
• Enthusiastic, highly motivated, and able to learn quickly.
• Owernship and ability to work independently.
• Startup experience or work in agile, fast-paced environments

Bonus skills: 

• Experience with Real-Time updates via Socket.io or similar.
• Experience with microservices architecture.
• Experience with Agentic AI, any framework (e.g., LangSmith, LiteLLM, etc.).
• Familiarity with AWS, Azure, or other cloud platforms- Understanding of CI/CD pipelines.

Why Upstart13?

• We put people first at Upstart 13! We believe the world is filled with amazing people and we are willing to go to great lengths to seek out others who share our values to join our cause of bringing down borders in technology for people everywhere.
• We develop leaders at Upstart 13, we focus on what matters to do meaningful work, we own our shit, we stay curious, and we understand responsibility leads to giving. We do big things together!

Perks:

• Job-type: long-term, full-time job.
• Fully remote.
• USD competitive salary. 
• 20+ Paid time off days.

Are you ready to join our cause? Be sure to ask, “Why 13?”