Senior Software Engineer (Brazil)

Felix is hiring a Senior Software Engineer (Brazil). Level rates it ; you can apply on Level.

Level's read on this job

Level rates this software engineer role Works on AI ●●●○: the daily work is on AI products, without building the model.
Some of the work can be done remotely, according to the posting.
The posting mentions Whatsapp, NLP and chatbots among its tools and skills.
Felix has 80 other open roles on Level.
This posting went up within the past two weeks.

AI in this role

Design and enhance conversational chat interfaces and chatbots for AI-powered financial services.

nlpchatbotsconversational-interfacesnatural-language-processingproduct-engineeringfull-stack

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.
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
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.
Want to learn more about our privacy practices? Check out our Privacy Policy.

How we rate this

Senior Software Engineer (Brazil) at Felix rates 65 out of 100 for how much of the daily work is AI. That makes it Works on AI (AI Level 3 of 4). The level is about AI in the job, not seniority.

Classification

Works on AI. The daily work is on AI products, without building the model.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Open the description and count.

Key facts

Senior Software Engineer (Brazil) is an open job at Felix.
Level rates this role AI Level 3 of 4: Works on AI.
The role is based in Brazil - Remote and is marked remote.
The job was posted on October 5, 2026.
Seniority: senior.
Applications are handled by Felix. Apply on Felix

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

NLPChatbotsConversational InterfacesNatural Language ProcessingProduct EngineeringFull StackWhatsapp

Also common in software engineer jobs at this level

AWS LLM AI agents Java TypeScript C++

Pay

Typical software engineer job: $168k

This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs

Questions you could be asked

What NLP problem have you worked on, and how did you measure whether it actually worked?
Tell me about a project where chatbots was part of your work. What did you do?
Tell me about a project where conversational interfaces was part of your work. What did you do?
Tell me about a project where natural language processing was part of your work. What did you do?
Tell me about a project where product engineering was part of your work. What did you do?

Adapt your resume

List these exact terms on your resume: NLP, Chatbots, Conversational Interfaces, Natural Language Processing, and Product Engineering. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
Show where AI is part of your daily process, not a one-off project. This role expects it to be a running habit.

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