Senior Full-Stack Engineer - AI-Powered Fintech Platform (Remote)

Félix; Buenos Aires; Remote; ARS 185,819,000 - 278,728,000; Full time

Benefits offered by this job

Stock options

Annual performance bonus

Health, dental, and vision plans

Unlimited PTO

Parental leave

Remote-first culture

Job summary

Félix is hiring a Senior Software Engineer to shape the core technology behind our chat-driven platform. You will work on the Product Engineering team, building scalable backend services and frontend interfaces across web and mobile, enabling seamless, natural interactions with remittance services.

You will design and implement high-performance systems, leverage Google Cloud, Kubernetes, and modern frontend stacks, and mentor junior developers while collaborating with product, UX/UI, and

Qualifications

• 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 Hexagonal Architecture, Event Driven Architecture, A/B Testing, Feature Flags, and Gradual Rollouts.
• Familiarity with AI tools such as Claude, Cursor, Codex or similar technologies.
• Fluent or Advanced English.

Responsibilities

• Design & Architecture: Architect and implement high-performance, scalable backend microservices, including core components of the Chat Platform.
• User Interfaces: Build, deploy, and iterate on UI services and conversational interfaces on remittance platforms.
• Infrastructure: Design and manage infrastructure capable of handling millions of daily requests with real-time messaging capabilities.
• Cloud Integration: Develop backend services using Google Cloud services.

Skills

Backend engineering

Algorithms & DS

REST/SOAP APIs

AI tools familiarity

Architecture patterns

Collaboration & mentoring

Tools

React

React Native

Kubernetes

Terraform

Google Cloud

gRPC

Job description

Félix is hiring a Senior Software Engineer to shape the core technology behind our chat-driven platform. You will work on the Product Engineering team, building scalable backend services and frontend interfaces across web and mobile, enabling seamless, natural interactions with remittance services.

You will design and implement high-performance systems, leverage Google Cloud, Kubernetes, and modern frontend stacks, and mentor junior developers while collaborating with product, UX/UI, and