Senior Software Engineer (Brazil)

Felix; São Paulo; Remote; BRL 712,000 - 967,000; Full time

Benefits offered by this job

Stock options

Annual bonus

Health plan

Remote work

Learning opportunities

Unlimited PTO

Job summary

Félix is seeking a senior backend engineer to shape the core technology behind its chat-driven remittance platform. You will design scalable microservices and build conversational interfaces that power interactions across WhatsApp and other channels.

The role emphasizes Python, Google Cloud, and modern backend patterns, with opportunities to mentor others and contribute to a fintech with global reach. This is a fully remote position with potential hybrid migration in the future.

Qualifications

• 5+ years of software engineering in fast-paced environments.
• Strong foundation in algorithms and data structures.
• Experience with web services (SOAP/REST) and architectural patterns.

Responsibilities

• Architect and implement high-performance, scalable backend microservices for the chat platform.
• Build and iterate on chatbot services and conversational interfaces.
• Manage infrastructure for millions of daily requests with real-time messaging.
• Develop backend services using Google Cloud and industry standards.
• Mentor junior developers and collaborate with product/UX/business units.
• Improve conversational experiences using customer feedback and analytics.
• Proficiency in English at an upper-intermediate level or higher.

Skills

Python

REST APIs

Kubernetes

Google Cloud

NLP

Tools

DialogFlow

IBM Watson

Rasa

Job description

About Us

At Félix, we are building the indispensable financial companion for Latinos in the US. We combine an AI-powered, conversational-first interface with real-time financial infrastructure to make cross-border money movement as easy as sending a text. Starting with fast, affordable remittances powered by AI and crypto rails, we are expanding into credit, savings, and wallet services to support the complete immigrant financial journey. Our ambition is to deliver a white-glove financial experience with the simplicity of a conversation to a community the traditional financial system has historically overlooked.

At Félix, we are building the indispensable financial companion for Latinos in the US. We combine an AI-powered, conversational-first interface with real-time financial infrastructure to make cross-border money movement as easy as sending a text. Starting with fast, affordable remittances powered by AI and crypto rails, we are expanding into credit, savings, and wallet services to support the complete immigrant financial journey. Our ambition is to deliver a white-glove financial experience with the simplicity of a conversation to a community the traditional financial system has historically overlooked.

We are a hyper-growth Series C company, backed by over $300 million in funding from top-tier global investors, including Andreessen Horowitz, QED, Castle Island, Switch Ventures, HTwenty, Monashees, General Catalyst Customer Value Fund. This isn't just about the numbers; it's a testament to the trust our investors have in our vision and our team. Additionally, Félix was selected as an “Endeavour Entrepreneur” and was a recipient of the CrossTech Fintech Startups Award. 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 because we are obsessed with our customers. We get things done with urgency and focus, driven by extreme ownership over our impact. We collaborate without ego, fostering radical transparency and fierce loyalty so we can grow together. Because we aim for insanely great rather than just good enough, we stay insatiably curious—always experimenting, building the future today, and delivering a product that truly makes our users' lives better.

About The Role

As a key member of our engineering team, you will have a unique opportunity to shape the core technology behind our chat-driven platform. You will work on Félix's Product Engineering Team — a sophisticated system that not only processes high volumes of transactions but also delivers conversational experiences through integrated chatbots and natural language interfaces. Your role will be crucial in designing and enhancing interactive chat services that enable seamless, intuitive user interactions on platforms like WhatsApp. If you have experience building chatbots or crafting conversational experiences, this is your chance to make a significant impact.

Technology Stack

We Are Technology Agnostic And Value Candidates With Diverse Backgrounds. While Familiarity With The Following Is Helpful, Your Willingness To Learn And Adapt Is Paramount Back-end: Python, Flask/FastAPI, REST APIs, Redis, SQL, gRPC Cloud: Google Cloud services (Firestore, Cloud Storage, Pub/Sub, Google Artifact Registry, Cloud Run, BigQuery, Cloud Composer, etc.) Infrastructure: Kubernetes, Terraform, NewRelic, PagerDuty

Responsibilities

• Design & Architecture: Architect and implement high-performance, scalable backend microservices, including core components of our Chat Platform.
• Conversational Interfaces: Build, deploy, and iterate on chatbot services and conversational interfaces that empower users to interact naturally with our remittance services.
• Infrastructure: Design and manage infrastructure capable of handling millions of daily requests with real-time messaging capabilities.
• Cloud Integration: Develop backend services using established industry standards and Google Cloud services.
• Collaboration & Mentorship: Foster the growth of junior developers through mentorship and best practice implementation, while collaborating closely with cross-functional teams including product, UX/UI, and business units.
• Continuous Improvement: Leverage customer feedback and analytics to iterate and improve our conversational experience, ensuring that our chatbots remain effective and user-friendly.
• Proficiency in English at an Upper-Intermediate level or higher is required.

Requirements

• 5+ years of experience as a Software Engineer in a fast-paced environment.
• Proven ability to build, ship, and iterate on software applications with an emphasis on real-world impact.
• Strong foundation in algorithms and data structures.
• Experience with web services, including SOAP and REST APIs.
• Familiarity with architectural patterns like Hexagonal Architecture, Event Driven Architecture, A/B Testing, Feature Flags, and Gradual Rollouts.
• Conversational Experience: Demonstrated experience in building chatbots, conversational interfaces, or integrating natural language processing (NLP) tools. Familiarity with chatbot frameworks (e.g., DialogFlow, IBM Watson, Rasa) is a plus.
• Passion for building products that positively impact millions.
• Commitment to continuous learning and exploration of new technologies.
• Ability to thrive in a collaborative environment and contribute actively with innovative ideas.
• Excellent prioritization skills.
• Curiosity and/or experience in Fintech is an added advantage (though equivalent competencies will also be considered).

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
• Work model: Currently fully remote, with a future transition to a hybrid setup.
• Continuous learning opportunities
• Unlimited PTO