Felix

AI Engineer (Agents)

New York, USA

Sponsorship not specified$105k-$170kDetected 8 days ago

PythonGitVector DatabasesDockerKubernetesCI/CDMachine LearningLLMsRAGAgentic AILLMOpsLangGraphA/B TestingLeadershipCommunication

About the role

We are seeking a proactive and highly skilled AI Engineer to join our core AI team.
We are open to hiring at the Semi-Senior, Senior, or Staff level.
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).

Architect, develop, and maintain scalable, stateful AI agents.
You won't just build "demos"; you will ship hardened systems using Python and modern frameworks (Google ADK, LangGraph, CrewAI, etc.) that handle real-world edge cases.
Implement tracing and observability (e.g., LangSmith, Arize Phoenix, or Weights & Biases) to track reasoning paths, tool-calling success rates, and latency bottlenecks.
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.
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.
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.
Drive best practices in asynchronous programming, error handling for non-deterministic outputs, and structured data validation (Pydantic, etc.).
Production-Grade Agent Architecture: Architect, develop, and maintain scalable, stateful AI agents.

Mandatory expertise in Python and deep familiarity with 1 core LLM APIs and frameworks (OpenAI SDK, Google AI SDK, CrewAI, LangChain, etc.).
Proven experience implementing agentic systems, including knowledge of RAG, vector databases, and memory/state management.
Proven ability to translate high-level business needs into concrete, maintainable, and well-tested code.
Technical Mastery: Mandatory expertise in Python and deep familiarity with 1 core LLM APIs and frameworks (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.
Execution & Communication: Proven ability to translate high-level business needs into concrete, maintainable, and well-tested code.

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.

This policy applies to all terms and conditions of employment, including recruitment, hiring, placement, promotion, training, compensation, benefits, and termination.
This isn't just about the numbers; it's a testament to the trust our investors have in our vision and our team.

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.
Additionally, Félix was selected as an "Endeavour Entrepreneur" and was a recipient of the CrossTech Fintech Startups Award.
We are a group of extremely talented and dedicated high-performers, united by our 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 shit done with urgency and focus.
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 a team that is fiercely loyal to each other, where radical transparency and constructive feedback are how we grow and push for excellence.
We are bold, we care less about what others are doing, and more about creating sustainable value and a product that truly makes our users' lives better.

This listing is sourced directly from Felix's careers page and normalized into a canonical job model.