Senior Staff Software Engineer

ABOUT EARNIN

• Own architecture that spans business units: define domain boundaries, decide where cross-cutting concerns belong, and keep product logic, policy, and funds flow in the right layers.
• Lead design and architecture reviews across BUs, and record decisions in clear, durable architecture decision records.
• Drive decomposition and unification roadmaps for shared systems, including how user state is split across domains, and sequence the work so teams can adopt it incrementally.
• Prevent accumulated complexity by making deprecation, experiment cleanup, and clear ownership part of the design, not an afterthought.
• Partner with Platform, Money Platform, and BU engineering leads so standards are practical, adopted, and not duplicated.
• Use AI tools daily for design exploration, code analysis, and review, and build the agents, skills, and documentation that make our architecture legible to both engineers and AI coding agents.
• Set the bar for responsible AI-assisted development: guardrails, review practices, and patterns that keep AI-generated code consistent with our architecture.
• Mentor Staff and Senior engineers through design reviews, code, and architecture guidance, and help raise the technical bar across teams.
• Contribute to hiring and onboarding, and represent engineering in technical discussions with product, risk, and leadership.

• Bachelor’s, Master’s, or PhD in computer science, computer engineering, or a related technical discipline, or equivalent industry experience.
• 10+ years of backend or full-stack software development, with a track record of designing and evolving large distributed systems.
• Demonstrated experience defining domain boundaries and service contracts across multiple teams, with practical knowledge of domain-driven design, event-driven systems, and clean architecture.
• Hands-on, daily use of AI coding and design tools, with concrete examples of how they changed the way you work and the results you achieved.
• Experience leading cross-team technical initiatives and influencing without direct authority, including resolving disagreements between teams.
• Excellent written and verbal communication, including the ability to turn complex trade-offs into clear decisions and documentation.
• Experience in fintech, payments, or other regulated, high-reliability environments is a plus.
• Ability to thrive in a fast-paced, dynamic, results-driven environment.

At EarnIn, we believe that the best way to build a financial system that works for everyday people is by hiring a team that represents our diverse community. Our team is diverse not only in background and experience but also in perspective. We celebrate our diversity and strive to create a culture of belonging. EarnIn does not unlawfully discriminate based on race, color, religion, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, legally protected medical condition, family care status, military or veteran status, marital status, registered domestic partner status, sexual orientation, genetic information, or any other basis protected by local, state, or federal laws. EarnIn is an E-Verify participant.