Semi-Senior Software Engineer

Felix; Seattle (WA); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Stock options

Annual bonus

Health/Dental/Vision

401(k) match

Hybrid work

Learning opportunities

Unlimited PTO

Parental leave

Growth opportunities

Job summary

Felix is seeking a Semi-Senior Software Engineer to join our fintech engineering team in Seattle. You will own key projects, design and develop scalable backend services with Python, and shape the architecture of core financial infrastructure.

You'll collaborate with product and engineering, leverage GCP, and contribute to payment processing, risk controls, and transaction flows while growing technically and taking on more responsibility in a fast-paced, entrepreneurial environment.

Qualifications

• 2–5 years of professional software engineering experience.
• Strong proficiency in Python and backend development fundamentals.
• Experience with RESTful APIs, databases (SQL/NoSQL), and cloud platforms (GCP preferred).
• Understanding of distributed systems, scalability, and fault tolerance.
• Strong communication skills and a collaborative, problem-solving mindset.

Responsibilities

• Design, build, and maintain backend services using Python.
• Contribute to architecture decisions and help scale payment and financial systems.
• Write clean, testable, and maintainable code with a focus on performance and reliability.
• Troubleshoot and resolve production issues with a mindset for long-term improvement.
• Collaborate with product managers, designers, and other engineers to define and deliver solutions.
• Use GCP services to build cloud-native solutions.
• Participate in improving CI/CD pipelines, observability, and dev tooling.

Skills

Python

REST APIs

Distributed systems

Cloud platforms (GCP)

SQL/NoSQL

Tools

Flask/FastAPI

gRPC

Kubernetes

Terraform

NewRelic

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.

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

We’re looking for a Semi-Senior Software Engineer to join our fintech engineering team. In this role, you’ll take ownership of key projects, contribute to the design and development of scalable systems, and help shape the architecture of our core financial infrastructure. You’ll work closely with product and engineering teams to build services that power payment processing, risk controls, and transaction flows—all while deepening your expertise in Python and Google Cloud Platform (GCP).

This is a great opportunity for an engineer who’s moved beyond the junior stage and is ready to take on more technical responsibility while continuing to learn and grow.

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

• Design, build, and maintain backend services using Python


• Contribute to architecture decisions and help scale payment and financial systems


• Write clean, testable, and maintainable code with a focus on performance and reliability


• Troubleshoot and resolve production issues with a mindset for long-term improvement


• Collaborate with product managers, designers, and other engineers to define and deliver solutions


• Use GCP services (e.g., Pub/Sub, Cloud Functions, Firestore, BigQuery) to build cloud-native solutions


• Participate in improving CI/CD pipelines, observability, and dev tooling

Requirements

• 2–5 years of professional software engineering experience


• Strong proficiency in Python and backend development fundamentals


• Experience working with RESTful APIs, databases (SQL/NoSQL), and cloud platforms (GCP preferred)


• Understanding of distributed systems, scalability, and fault tolerance


• Strong communication skills and a collaborative, problem-solving mindset


• These are the applicable requisites, although equivalent competencies in any of the above will also be considered

What We Offer

• Salary range: $120,000 - $160,000


• Initial stock options grant


• Annual performance bonus


• Health, dental, and vision plans


• 401(k) with employer match
  
• Hybrid working model


• 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.

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