Staff Software Engineer

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 powered by 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, Félix was selected as an "Endeavour Entrepreneur" and was a recipient 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
Join Félix as a Staff Software Engineer to lead the creation of our Identity & Account Management team. You'll be responsible for building the systems that form the backbone of how users create, verify, and manage their accounts safely and seamlessly across our ecosystem.
This is a highly strategic and technical role where you'll architect and implement robust, scalable, and secure identity solutions that balance frictionless user experience with compliance and security needs. You'll partner closely with Product, Security, Fraud, and Platform teams to define the technical vision for account identity at Félix and set a new standard for reliability and trust in fintech identity management.
As Staff Software Engineer, you will be the technical anchor for the team, leading the design and delivery of green‑field initiatives that touch every corner of Félix's financial stack. You will turn ambiguous business problems into resilient, scalable systems that directly influence strategic decisions and unlock new revenue streams.
This is a hands‑on role for an engineer who loves diving deep into complex financial domains, setting architectural vision, and mentoring others to raise the bar.

This role is open to all candidates in Latin America.

Responsibilities
Build the Foundation: Lead the architecture and end-to-end development of Félix's Identity & Account Management systems, including authentication, authorization, and account lifecycle services.Drive Technical Vision: Define and execute the long-term strategy for identity and account management, balancing user experience, scalability, and regulatory compliance.Ensure Security & Compliance: Implement secure identity flows, KYC/KYB integrations, MFA, and account recovery mechanisms in alignment with AML, GDPR, and data privacy requirements.Enable Platform Integration: Partner with engineering teams to ensure seamless integration of identity services across all products and platforms.Operational Excellence: Establish observability, monitoring, and alerting frameworks to ensure reliability and uptime for identity systems.Innovate with AI & Data: Collaborate with AI and Data teams to leverage behavioral analytics and identity intelligence to detect anomalies and strengthen account security.Mentor & Lead: Set a high technical bar, mentor engineers, and cultivate a culture of excellence, inclusion, and continuous learning within the new Identity team.Cross-functional Collaboration: Work closely with Product, Risk, and Security leaders to define policies, user flows, and guardrails that balance trust and growth.
Requirements
8+ years in Software Development: Proven experience designing and delivering scalable backend systems.3+ years in Identity / Account Management: Hands-on experience building or maintaining systems for authentication, authorization, KYC, or access control at scale (OAuth2, OpenID Connect, SSO, etc.).System Design Mastery: Deep knowledge of distributed systems, microservices, and event-driven architectures.Strong Tech Stack Skills: Proficiency in Python, SQL, and modern backend frameworks; familiarity with identity platforms (Auth0, Okta, Cognito) and cloud IAM services.Security Mindset: Solid understanding of encryption, token management, and best practices in secure session management.Leadership Expectations: Inspire and guide our team by setting high technical standards, offering mentorship, and championing best practices. You'll be instrumental in architectural decision-making and will lead by example in our rapidly evolving environment.Natural Investigator: A curious and incisive mind, capable of uncovering the core reasons behind fraudulent activities and crafting proactive, effective prevention strategies.Effective Collaborator: Strong interpersonal and communication skills to partner seamlessly with cross-functional teams, articulate findings clearly, and influence strategic decisions.Self-Driven & Accountable: A self-starter with excellent judgment, comfortable navigating ambiguity and taking initiative in dynamic environments.Academic Foundation: Bachelor's degree in Computer Science or a related field. A Master's or PhD is a plus.English Proficiency: Upper-Intermediate or higher.Equivalent skills and competencies will be considered even if they don't match every listed requirement.

Nice to have
Experience with micro-frontend architectures.Knowledge of design tokens, theming, and multi-brand support.Background in fintech or other high-availability systems.Contributions to open-source design systems or UI frameworks.

What We Offer
Competitive salaryInitial stock options grantAnnual performance bonusHealth, dental, and vision plans Remote work environment, although we have offices in Miami and México City and would love to work in hybrid model if you are up to it.Continuous learning opportunities Unlimited PTOPaid parental leaveEmpowering 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.

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