Senior Software Engineer (Fintech Platform)

United Statesfull_timeVerifiedPosted 22 May 2026

About the role

About Us

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. This isn't just about the numbers; it's a testament to the trust our investors have in our vision and our team. Additionally, the Félix founders were selected as “Endeavour Entrepreneurs” and were recipients 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.

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. 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. We are building the future, today.

About the Role

In this role, you will be instrumental in shaping the core architecture of our Fintech Platform. You will work in one of our three squads—Payments, Disbursements, or GRC—to build, optimize, and scale the backend microservices that drive our financial operations. This is a unique opportunity for a talented engineer who is passionate about secure, high-performance financial systems and has experience in building solutions that handle complex payment, compliance, and disbursement workflows.

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:
Front-end: React, HTTP, HTML/DOM, JavaScript, CSS, AJAX
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

Platform Architecture & Development: Architect and implement scalable backend microservices inside the Payments, Disbursements, or GRC squad.
Payments Squad: Develop and optimize systems for securely collecting funds from users, ensuring efficient transaction processing.
Disbursements Squad: Design and implement robust services that handle the secure and timely disbursement of funds to beneficiaries.
GRC Squad: Build and enhance systems for user onboarding, KYC, and compliance, ensuring adherence to regulatory standards.
Infrastructure & Scalability: Design and manage infrastructure capable of handling millions of daily requests while maintaining the highest standards of security and performance.
Cloud Integration: Utilize Google Cloud services and industry-standard tools to build and maintain distributed systems.
Cross-functional Collaboration: Work closely with product, operations, compliance, and other business units to deliver holistic financial solutions.
Mentorship & Growth: Mentor junior developers and promote best practices across the engineering team.
Continuous Improvement: Leverage user feedback and system analytics to refine and iterate on platform capabilities.

Requirements

5+ years of experience as a Software Engineer in a fast-paced, dynamic environment.
Fluent or advanced English preferred. Upper-intermediate is also fine, as long as you can communicate clearly in a professional setting.
Proven track record of building, shipp