Full Stack Engineer - Backend Focused

Full Stack Engineer - Backend FocusedSan FranciscoIt's time that payments work for merchants, not the other way around. Ansa is building a branded wallet solution to increase customer retention and unlock new growth opportunities.Ansa helps innovative and growing companies by providing an enterprise-grade, white-label stored value wallet platform paired with incentive tooling. Our platform enables our customers to turn stored value and loyalty programs into a powerful growth engine that increases customer retention, drives repeat purchases, and boosts margins, all without the cost and complexity of building it in-house.We're seeking a Backend Engineer who wants end-to-end ownership of core backend systems and the chance to have an outsized impact on a product used by fast-growing consumer brands. You'll make meaningful architectural decisions and work closely with leadership to influence both product and technical strategy. Does this sound like you? Let's chat!What you will be doing?Scale our core ledger that tracks both digital and physical money movement.Scale our card network integrations that power in-store payments.Build and maintain complex reconciliation infrastructure to make sure we never lose a cent across our partner bank, payment processors, merchants, and card networks.Build and scale our financial reporting & accounting integrations that allow our merchants to close their books seamlessly.Design and maintain our payment APIs and SDKs that make for frictionless integration.Design and build features that prime us for enterprise-readiness, including SSO and RBAC.Design and ship products that help merchants drive end-user adoption and engagement, creating a flywheel of user spend (i.e. our incentives engine and analytics).Scale up our cloud infrastructure as we move towards fully containerized, blue-green deployment.Own end-to-end design, implementation, and release of features.Design and implement engineering processes.Prototype new ideas and iterate towards the ideal user experience.Contribute to our engineering infrastructure.Help grow our engineering teamAbout youYou have 6+ years of experience independently owning and driving scalable, impactful projects end to end.Based in the SF Bay Area (or willing to relocate!) and excited about working closely in-person with a tight-knit team.Innately curious and brave enough to consider new payment paradigms or verticals for applications, can navigate low information environments.Execution oriented, excited by the high-ownership nature of joining a team at this stage.Interested in building a top class engineering culture from the ground up.Appreciates and looks for elegant solutions but understands trade-offs of robust designs/engineering vs. moving fast.Experience building fast, reliable cloud applications.Nice to havesOperated at a growth stage startup before.Familiarity with Golang web frameworks, AWS, Postgres.Experience in building one of these areas: core ledgers, money movement platforms/services, and merchant facing APIs for in-app/online POS.Bonus points if you have experience in mentoring other team members, and have previously worked closely with designers.Our cultureWe're a small team with a big mission. That means we have to hold ourselves to a high bar, by design. With limited resources and high ambition, excellence in quality, communication, and ownership, ambition isn't optional — it's how we move forward.Ownership — if you see it, you take it. We don't wait to be told.Nosiness — curiosity across boundaries, asking questions, stepping beyond scope to solve problems.High agency — proactive and self-directed. You move the work, not the other way around.Accountability — we do what we say, and communicate proactivelyRelentless drive — we work with focused intensity and follow through, even when it's hard.Thoughtful execution — shipping work that's not just fast, but intentional. Think about how decisions today will affect us down the road.Pride in your craft — we sweat the details and take our work personally, because it reflects who we are.Kindness and trust — we give each other respect, empathy, and the benefit of the doubt. We assume good intent and act like teammates.BenefitsStellar health, dental, vision insurance coverage, including fertility benefits and One Medical.Unlimited PTO and observed local holidays.We also offer 401(k), healthcare FSA, and dependent care FSA to fit your needs.