988 - Full Stack Engineer React Python AI Agents GCP Senior Remote LATAM

Disclaimer – Must read: Commitment & Focus This role requires full-time dedication, with clear priority given to Darwoft projects during the established working hours. It is not compatible with other full-time professional engagements. Any additional professional activities must be disclosed in advance and must not interfere with the responsibilities or working hours of this role.

About Darwoft

Darwoft is a software factory that develops custom software solutions and provides IT staff augmentation services for international clients, primarily in the United States and Latin America. We work with startups and growing companies, developing high-impact digital products. Our culture is people-first, oriented towards technical quality, long-term relationships, and a collaborative mindset. We combine technical excellence with human proximity.

Senior Fullstack Developer (React/Python/AI Agents/GCP) | Contractor LATAM

Location: LATAM (Remote)

Contract Type: Contractor

Industry: Fintech – Cross-border Payments & AI Enterprise Agents

Timezone: Flexible within LATAM

English Level: B2 / C1 (Advanced)

About the Role

We are collaborating with a fast-growing Fintech that facilitates cross-border payments and remittances in Latin America, utilizing WhatsApp as a key product channel. The company is scaling rapidly and investing in two strategic fronts: product innovation and AI applied to internal operations.

As a Senior Fullstack Developer, you will build secure and scalable user experiences, backend services, and AI-driven initiatives involving agent systems, data integrations, and enterprise automation. This is an ideal opportunity for an engineer who enjoys building at a fast pace while maintaining high engineering standards.

Responsibilities

• Develop responsive, secure, and user-friendly interfaces using React and TypeScript.
• Build complex onboarding flows and account management systems to handle sensitive user identity data and PII.
• Implement modern authentication flows, including social login and identity patterns (OAuth2, OIDC, JWT).
• Design and develop robust backend services and REST APIs using Python, ideally with FastAPI.
• Integrate frontend components with backend APIs, authentication services, and third-party identity systems.
• Design and manage relational database schemas (PostgreSQL, MySQL, or CloudSQL) ensuring data integrity.
• Contribute to AI Enterprise initiatives, including internal agents, automation workflows, RAG-style data retrieval, and API-driven tool integrations.
• Connect AI agents and internal tools with various data sources through secure APIs, filtering, and validation logic.
• Implement monitoring, logging, auditing, and evaluation mechanisms for production workflows.
• Collaborate with backend, product, UX, and AI engi