Fullstack Engineer at Monks – Brasil | Jobyssey

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We’re looking for a Senior Full Stack Engineer to join our team. Whether you’re ready to embed with an established squad or help bootstrap a brand-new one, this is an opportunity to build impactful features across the stack with modern tools and a smart, collaborative team. You’ll report to an Engineering Manager and work on real, high-impact initiatives.

Responsibilities:

Own end-to-end feature delivery, from UI/UX to API and database design.
Build and maintain scalable React interfaces
Architect and implement APIs using NestJS and Postgres
Manage integrations with external services using internal credential/token management systems
Design and implement secure OAuth 2.0 flows and SSO (Google, Microsoft, etc.)
Contribute to and maintain our Docker/Kubernetes/Helm-based infrastructure
Collaborate with designers, product managers, and engineers across the organization
Write clean, maintainable, and well-documented code across the stack

About You

The essentials:

Strong proficiency with TypeScript, React, NestJS, and Postgres
Comfortable shipping across the entire stack, UI to DB.
Experience with monorepo tooling (pnpm, turborepo, nx)
Solid understanding of API authentication, credential management, and secure integrations with third-party services
In-depth knowledge of OAuth 2.0, including implementation of valid auth flows and SSO
Experience working with Docker, Kubernetes, and Helm in production environments
Familiarity with domain-driven design or clean architecture patterns

Not a must, but a plus:

Experience with infrastructure as code (we use Terraform)
Prior work in high-compliance environments (HIPAA, SOC2, etc.)
Experience bootstrapping new squads or systems from scratch.
AI/ML familiarity, especially implementing tools like LangChain or working with embeddings and RAG pipelines

Location Requirement:

This is a remote role, but applicants must be based in Brazil and legally eligible to work in the country.

#LI-Remote #LI-ML1

About Monks

Monks is the global, digital-first, data-driven, unitary operating brand of S4Capital plc, where our culture centers on how we show up for the work and for one another. That begins with the commitment to strive for mastery—taking deep pride in our craft and creating work that sets the bar. In everyday execution, we drive momentum by choosing bold action rather than waiting for certainty. Above all, our teams are stronger together, bringing diverse perspectives into a unified team that communicates with clarity, trust, and mutual respect.

This commitment to craft and innovation translates directly into widespread industry acclaim: Monks was named a Contender in The Forrester Wave™: Global Marketing Services and a leader in the 2026 Gartner® Magic Quadrant™ for Global Digital Marketing Agencies. It ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization (2025), Monks was also awarded Business Intelligence Group’s 2026 Excellence in Artificial Intelligence Award in the Human-Machine Interaction Team category. Additionally, Monks.Flow earned AI-based Marketing Solution of the Year at the 2026 AI Breakthrough Awards and a 2026 Global Generative AI Award in the Agentic Marketing Innovation category. Finally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner.

We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.

Fullstack Engineer

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