Full Stack Engineer - Backend Focused

Ansa
San Francisco, CA

It’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.

Our best-in-class closed-loop-wallet as a service enables payment experiences akin to the Starbucks balance, the Clipper card, Steam Wallet, and Uber Cash.

With Ansa, our merchant partners have increased revenue over 25% and seen over 50% higher customer retention. We are convinced that we are the last piece of the puzzle in driving delightful loyalty experiences with our slick payments product.

Engineers on our team work on new product initiatives and help scale our payment infrastructure to millions of processed $ volume. You’ll work closely with our existing customers and cross functionally with our product designer and go-to-market roles. We are post revenue and are excited to rapidly grow this year. From building out our in-store payment offering, growing our developer platform, to spearheading our robust analytics and reporting products, there’s a ton of exciting work to take on!

🤔 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 team 🎉

👋🏼 About you


  • You 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 haves


  • Operated 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 culture


  • Bias to action, momentum is everything.

  • Getting it right is better than being right - we win as a team.

  • We collaborate efficiently.

  • Have an eternal learner’s mindset.

  • Be an owner.

  • Enjoy the journey and be good to each other.

  • We have a physical office space in the Mission – we aim to work mostly in-person but are flexible with hybrid work. We care deeply about making the office a fun and safe space to collaborate as a team and grow our team culture and identity 🙂

  • Half the fun of this stage of building is the camaraderie, standing around a whiteboard, and codifying the culture together.

  • We provide daily team lunches 🍽️ we’re close to a lot of great food options and love trying new places as a team ( Flour + water , bon nene , tartine , etc.)

  • We also have monthly game nights 🎲

🥞 Benefits


  • Stellar health, dental, vision insurance coverage, including fertility benefits & One Medical.

  • Unlimited PTO + observed local holidays.

  • Commuter benefits and new equipment.

  • We also offer 401(k), healthcare FSA, and dependent care FSA to fit your needs.

Posted 2026-02-07

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