Senior Full Stack Engineer

NextDay AI; Brasil; Remote; BRL 120,000 - 220,000; Full time

Benefits offered by this job

Unlimited vacations

100% remote work

Flex-time

Job summary

NextDay AI is seeking a highly skilled Full Stack Developer to join our team. You will design, develop, and maintain both front-end and back-end systems for our web apps, working in a tight growth-oriented group while integrating cutting-edge AI technologies for high-volume traffic.

The ideal candidate will have a TS/React/Next.js background, strong TypeScript knowledge, PostgreSQL expertise, and experience deploying on Vercel/AWS. North American hours and 100% remote work are supported.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Proven experience as a Full Stack Developer.
• Availability to work with North American hours
• Strong experience in building user interfaces and backend services using Typescript/React/Next.js.
• Deep understanding of TypeScript, typing patterns, interfaces, generics, and strict type safety.
• Experience building REST APIs and/or Route Handlers / Server Actions in Next.js.
• Experience building React based frontend component with Tailwind CSS, CSS Modules, or other styling systems.
• Thorough understanding of PostgreSQL (schema design, indexing, query optimization).
• Experience with third-party API integrations (webhooks, auth etc.).
• Experience deploying Next.js apps on Vercel, AWS, or other cloud providers.
• Familiarity with logging/monitoring tools (Sentry, Datadog, CloudWatch).
• Understanding of version control systems, such as Git.
• Excellent communication and interpersonal skills, with the ability to articulate technical concepts to a non-technical audience.
• Self-motivated and able to work effectively both independently and as part of a distributed team.
• Strong sense of ownership and urgency, with a commitment to delivering high-quality, polished products.
• Proven ability to quickly adapt to new technologies and a commitment to continuous learning.
• Creative and analytical mindset for tackling complex technical challenges and driving innovative solutions.

Responsibilities

• Design, develop, and maintain robust, scalable, and secure web applications from end-to-end.
• Implement user interface and user experience (UI/UX) designs using front-end technologies.
• Develop and manage back-end services and APIs (Application Programming Interfaces).
• Integrate front-end components with back-end logic.
• Write clean, well-documented, and efficient code.
• Perform testing and debugging to ensure high performance and responsiveness of the application.
• Collaborate with product managers, designers, and other engineers to deliver new features.
• Maintain code integrity and organization, and participate in code reviews.
• Stay up-to-date with new technologies and industry best practices.
• Leverage AI development tools efficiently to accelerate productivity while maintaining high standards of code quality.
• Thoroughly review and understand all AI-generated code to ensure full comprehension and quality before pushing to production.

Skills

TypeScript/React/Next.js

PostgreSQL

REST APIs

UI/UX with Tailwind/CSS Modules

Cloud deployment (Vercel/AWS)

Git

Logging/Monitoring (Sentry/Datadog/CW)

Third-party API integrations

North American hours availability

Education

Bachelor's degree in Computer Science/Engineering or related field

Tools

Vercel

AWS

Git

Sentry

Datadog

CloudWatch

Job description

NextDay AI is a privately held company and world leader specializing in applying artificial intelligence (AI) engineering and creative innovation in B2C entertainment products. Our mission is to leverage the power of Large Language Models (LLM) and generative AI (Gen AI) to create innovative consumer products that push the boundaries of entertainment and companionship. This is a unique opportunity to participate and make a real difference in a company actively working to shape the future of AI applications for consumers.

About the Role

We are seeking a highly skilled and motivated Full Stack Developer to join our team. The candidate will have the mission of bringing his expertise and contribution in the rapid growth of one of our current star products. You will be responsible for developing and maintaining both the front-end and back-end of our web applications, while working in a very tight group of collaborators in a growth hacking mode, constantly integrating new cutting edge AI technologies in the context of a high volume traffic web application.

This role requires a strong understanding of the entire development process, including design, development, and deployment, and a commitment to collaborative problem solving, sophisticated design, and the creation of quality products.

What the ideal candidate will have:

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Proven experience as a Full Stack Developer.
• Availability to work with North American hours
• Strong experience in building user interfaces and backend services using Typescript/React/Next.js.
• Deep understanding of TypeScript, typing patterns, interfaces, generics, and strict type safety.
• Experience building REST APIs and/or Route Handlers / Server Actions in Next.js.
• Experience building React based frontend component with Tailwind CSS, CSS Modules, or other styling systems.
• Thorough understanding of PostgreSQL (schema design, indexing, query optimization).
• Experience with third-party API integrations (webhooks, auth etc.).
• Experience deploying Next.js apps on Vercel, AWS, or other cloud providers.
• Familiarity with logging/monitoring tools (Sentry, Datadog, CloudWatch).
• Understanding of version control systems, such as Git.
• Excellent communication and interpersonal skills, with the ability to articulate technical concepts to a non-technical audience.
• Self-motivated and able to work effectively both independently and as part of a distributed team.
• Strong sense of ownership and urgency, with a commitment to delivering high-quality, polished products.
• Proven ability to quickly adapt to new technologies and a commitment to continuous learning.
• Creative and analytical mindset for tackling complex technical challenges and driving innovative solutions.

Key Responsibilities

• Design, develop, and maintain robust, scalable, and secure web applications from end-to-end.
• Implement user interface and user experience (UI/UX) designs using front-end technologies.
• Develop and manage back-end services and APIs (Application Programming Interfaces).
• Integrate front-end components with back-end logic.
• Write clean, well-documented, and efficient code.
• Perform testing and debugging to ensure high performance and responsiveness of the application.
• Collaborate with product managers, designers, and other engineers to deliver new features.
• Maintain code integrity and organization, and participate in code reviews.
• Stay up-to-date with new technologies and industry best practices.
• Leverage AI development tools efficiently to accelerate productivity while maintaining high standards of code quality.
• Thoroughly review and understand all AI-generated code to ensure full comprehension and quality before pushing to production.

Why Join Us?

• You love building real, meaningful features-not just completing tickets
• You want autonomy and real ownership
• You enjoy solving problems across frontend, backend, and database
• You thrive in a fast-paced, iterative environment
• You care about clean code and great user experience
• We offer Unlimited Vacations Policy
• You want a Real 100% remote work (we don't have physical offices to go to "once per week")
• You want Flex-time and Manage your schedule Policy (we are looking for teamwork and results)
• You want an opportunity to work closely with leadership and gain cross-functional experience in a fast-growing company at the forefront of the AI revolution.