Senior Full-Stack Engineer, Integrations & Chat (Remote)

Felix Technologies, Inc.; Región Centro; Remote; MXN 480,000 - 720,000; Full time

Benefits offered by this job

Stock options grant

Annual performance bonus

Health benefits

Remote work now; hybrid in future

Unlimited PTO

Paid parental leave

Growth opportunities

Job summary

Félix is building a transformative financial platform for cross-border remittances with a chat-driven interface and real-time infrastructure. As a key member of the Product Engineering team, you will shape core technology powering chatbots and frontend experiences across mobile and web, enabling seamless user interactions on WhatsApp, Web, and mobile.

You will design, implement, and optimize backend microservices, collaborate with product and UX teams, and mentor junior engineers while

Qualifications

• 5+ years of experience as a Software Engineer in a fast-paced environment.
• Experience building software with real-world impact.
• Strong algorithms and data structures fundamentals.
• Experience building web services (SOAP/REST).
• Familiarity with architectural patterns like Hexagonal/EDA.
• Familiarity with AI tools such as Claude, Cursor, Codex or similar.
• Fluent or advanced English.
• Fintech experience is a plus.
• Ability to collaborate and learn continuously.

Responsibilities

• Design & Architecture of scalable backend microservices.
• Build UI services and conversational interfaces for remittance products.
• Design and manage infra for millions of daily requests with real-time messaging.
• Develop backend services using Google Cloud.
• Mentor juniors and collaborate with cross-functional teams.
• Iterate the conversational experience using analytics and feedback.

Skills

5+ yrs exp

APIs (REST/SOAP)

Algorithms & DS

Architectural patterns

AI tools familiarity

English fluency

Tools

Python

React

Kubernetes

Terraform

SQL

Job description

Félix is building a transformative financial platform for cross-border remittances with a chat-driven interface and real-time infrastructure. As a key member of the Product Engineering team, you will shape core technology powering chatbots and frontend experiences across mobile and web, enabling seamless user interactions on WhatsApp, Web, and mobile.

You will design, implement, and optimize backend microservices, collaborate with product and UX teams, and mentor junior engineers while