AI Engineer (Agents)

Félix; São Paulo; Presencial; BRL 467 532 - 623 377; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Competitive salary

Initial stock options grant

Unlimited PTO

Resumo da oferta

Félix, a hyper-growth fintech company in São Paulo, is seeking a proactive AI Engineer. This role focuses on designing and integrating AI Agents into their product infrastructure. Ideal candidates have extensive experience in software engineering, particularly in AI applications, and are proficient in Python.

The position promises competitive compensation and a remote work environment, empowering talented individuals to contribute to meaningful projects for underserved communities.

Qualificações

• 7+ years of experience in software engineering, with 2+ years focused on AI/ML applications.
• Expertise in Python and familiarity with LLM APIs.
• Proven experience in implementing agentic systems and managing memory/state.

Responsabilidades

• Develop and maintain scalable, stateful AI agents.
• Establish production monitoring for workflows.
• Lead integration of AI agents into product infrastructure.

Conhecimentos

Python

Large Language Models (LLMs)

AI/ML applications

Asynchronous programming

Ferramentas

Docker

Kubernetes

Git

LangChain

Google AI SDK

Descrição da oferta de emprego

About Us

At Félix, we're building the financial ecosystem for Latin immigrants in the U.S., starting with a revolution in remittances. Our core product is an AI‑powered chatbot built on WhatsApp, allowing our users to send money home as easily as sending a text message. We leverage cutting‑edge technology like AI, blockchain, and stablecoins to make cross‑border payments faster, more affordable, and more accessible than ever before.

We are a hyper‑growth Series B company, backed by over $100 million in funding from top‑tier global investors, including QED, Castle Island, Switch Ventures, HTwenty, Monashees, and General Catalyst Customer Value Fund. Félix was selected as an “Endeavour Entrepreneur” and received the CrossTech Fintech Startups Award. We are a group of extremely talented and dedicated high‑performers, united by a shared obsession with a single goal: empowering our customers. We are all owners of Félix, driven by a bias for action and a true experimentation spirit to get things done with urgency and focus.

Joining Félix means you will be part of a team building a legacy, a company that will outlive us all. This is a rare opportunity to apply your skills to a deeply meaningful mission—serving a community that has been underserved for too long. We are fiercely loyal to each other, practice radical transparency and constructive feedback, and are bold, caring less about what others are doing, and more about creating sustainable value and a product that truly makes our users’ lives better. We are building the future, today.

About The Role

We are seeking a proactive and highly skilled AI Engineer to join our core AI team. This role is central to Félix’s next phase of growth, focusing on designing, building, and scaling autonomous AI Agents that will integrate directly into our product and internal operations.

You will be instrumental in evolving our WhatsApp‑based AI platform beyond simple Q&A into a sophisticated, multi‑agent system capable of reasoning, planning, and executing complex, multi‑step tasks across our critical functions (e.g., loans, payments, fraud). You will partner closely with JM Mommessin, our Head of AI, as well as with other engineering teams and PMs to translate our AI strategy into a tangible roadmap and bring it to life. This is a unique opportunity to apply a bias toward action and an experimentation spirit to solve deeply meaningful, real‑world problems for Latin immigrants in the U.S. If you thrive in a rapid‑iteration environment and want to build the infrastructure that powers a hyper‑growth fintech, this is your mission.

Responsibilities

• Production‑Grade Agent Architecture: Architect, develop, and maintain scalable, stateful AI agents. Ship hardened systems using Python and modern frameworks (Google ADK, LangGraph, CrewAI, etc.) that handle real‑world edge cases.
• LLMOps & Observability: Establish production monitoring for agentic workflows. Implement tracing and observability (e.g., LangSmith, Arize Phoenix, or Weights & Biases) to track reasoning paths, tool‑calling success rates, and latency bottlenecks.
• End‑to‑End Production Integration: Lead the integration of AI agents into core product infrastructure (Payments, Fraud, etc.). Own the full lifecycle, from containerization (Docker/Kubernetes) to CI/CD deployment and post‑launch stability.
• Advanced Evaluation Pipelines: Move beyond basic metrics. Design automated “evals‑as‑code” using LLM‑as‑a‑judge, semantic similarity testing, and adversarial benchmarking to ensure agent safety and groundedness before every release.
• Performance & Cost Engineering: Optimize RAG pipelines and agent loops for production constraints. Implement caching strategies, prompt compression, and model routing to balance inference costs with high‑performance requirements.
• Technical Leadership: Mentor junior engineers on software craft. Drive best practices in asynchronous programming, error handling for non‑deterministic outputs, and structured data validation (Pydantic, etc.).

Requirements

• Experience: 7+ years of hands‑on experience in software engineering, with at least 2 years dedicated to building and deploying production‑grade AI/ML applications, specifically focused on Large Language Models (LLMs) or generative AI.
• Technical Mastery: Mandatory expertise in Python and deep familiarity with at least one core LLM API and framework (OpenAI SDK, Google AI SDK, CrewAI, LangChain, etc.).
• Agentic System Knowledge: Proven experience implementing agentic systems, including knowledge of RAG, vector databases, and memory/state management.
• Engineering Fundamentals: Strong understanding of software development best practices, version control (Git/GitHub), and CI/CD pipelines. Experience with personal projects or demonstrable contributions on GitHub is a strong plus.
• Execution & Communication: Proven ability to translate high‑level business needs into concrete, maintainable, and well‑tested code.
• These are the applicable requisites, although equivalent competencies in any of the above will also be considered.

What We Offer

• Competitive salary
• Initial stock options grant
• Annual performance bonus
• Health, dental, and vision plans
• Remote work environment, with offices in Miami and México City and the option for a hybrid model
• Continuous learning opportunities
• Unlimited PTO
• Paid parental leave
• Empowering opportunities for growth in a dynamic entrepreneurial environment

Equal Opportunity Employer

At Félix, we are committed to providing equal employment opportunities to all qualified employees and applicants without regard to race, religion, nationality, sex, sexual orientation, gender identity, age, or disability. This policy applies to all terms and conditions of employment, including recruitment, hiring, placement, promotion, training, compensation, benefits, and termination.

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