Senior Fullstack Engineer (Next.js/AI Agents)

Kake; São Paulo; Presencial; BRL 622 000 - 881 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Competitive USD pay

Fully remote

Better Me Fund

Compassionate community

Resumo da oferta

Kake is seeking a product-minded fullstack engineer to join a fast-moving team building AI-powered products at the intersection of great UX and applied AI. You’ll work with Next.js/React to ship polished features, design agentic workflows, and integrate with multiple LLM providers, all while keeping a strong product sense and UI craft.

In this fully remote role, you’ll collaborate with design and product to translate requirements into reliable AI-enabled solutions, contribute to internal

Qualificações

• Proven experience with Next.js and React 18.
• Experience building multi-agent AI systems and agentic workflows.
• Backend experience with Postgres and API routes (Next.js API routes).
• Strong product sense and UI quality, animation, and design systems.
• Experience integrating with LLM APIs (OpenAI, Anthropic, Gemini) and/or RAG pipelines.
• Excellent written and verbal communication in English.

Responsabilidades

• Design, build, and ship fullstack features from UI to backend logic.
• Build and maintain agentic workflows and MCP server integrations.
• Collaborate with design to implement polished UI using Material UI and Figma specs.
• Build and maintain RAG pipelines and integrations with multiple LLM providers.
• Work with async job processing and Postgres-backed data models.
• Contribute to internal tooling and back-office workflows (Retool).
• Partner with product and design to translate requirements into technical solutions.
• Write clean, maintainable code and participate in code reviews.

Conhecimentos

Next.js

React 18

Multi-agent AI

UI/UX

LLM APIs

Postgres APIs

Inngest

MCP integrations

Design collaboration

English comms

Ferramentas

Postgres

Retool

Descrição da oferta de emprego

We're looking for a product-minded fullstack engineer to join a fast-moving team building AI-powered products at the intersection of great UX and applied AI. This role is heavy on product thinking, UI craft, and building with multi-agent systems and LLMs — not on infrastructure or distributed systems work. You'll be working across a modern Next.js/React stack while designing agentic workflows and MCP server integrations, so strong instincts for both clean interfaces and reliable AI system design are essential. This is a great fit for someone who loves building polished, delightful products and is excited to work at the leading edge of applied AI (multi-agent systems, RAG, voice agents).

Key Responsibilities

• Design, build, and ship fullstack features across the product, from UI to backend logic
• Build and maintain agentic workflows, including multi-agent systems and MCP server integrations
• Collaborate closely with design to implement polished, animated, high-quality UI using Material UI and Figma specs
• Build and maintain RAG pipelines and integrations with multiple LLM providers (Gemini, GPT, Claude, Perplexity)
• Work with async job processing (Inngest) and Postgres-backed data models
• Contribute to internal tooling and back-office workflows (Retool)
• Partner with product and design to translate requirements into technical solutions
• Write clean, maintainable code and participate in code review

Core Requirements

• Strong experience with Next.js (Pages Router) and React 18
• Experience building and reasoning about multi-agent AI systems and agentic workflows
• Solid backend experience with Postgres and building APIs (e.g., Next.js API routes)
• Strong product sense and a genuine interest in UI quality, animation, and design systems
• Experience integrating with LLM APIs (e.g., OpenAI, Anthropic, Gemini) and/or RAG pipelines
• Excellent written and verbal communication skills in English
• Ability to work independently in a remote, fast-paced environment

Nice-to-Have

• Familiarity with Material UI and translating Figma designs into production UI
• Experience with async job frameworks like Inngest
• Familiarity with Qdrant or other vector databases for RAG
• Experience using AI coding tools like Codex or Claude Code
• Experience with Retool or similar internal tooling platforms

Additional

• US Timezone Overlap: Required overlap with 9am–3pm PT (GMT-7)
• This role is not infrastructure-heavy — you won't be working on massive distributed systems or large-scale data problems. The ideal candidate is more energized by product craft, UI polish, and applied AI than by backend scale challenges.

The icing on the Kake:

Competitive Pay in USD – Work globally, get paid globally.

Fully Remote – Simply put, we trust you.

Better Me Fund – We invest in your personal growth and passions.

Compassion is Badass – Join a community that invests in social good.

Please Note: Due to the high volume of applications, only shortlisted candidates will be contacted.