Backend Engineer (Senior/Staff)

Help us solve fraud asap with Casap — where we’re building the world's first AI-native disputes automation and fraud prevention platform. Our mission is to create a future where trust is a given and fraud is rare by empowering financial institutions to automate disputes, eliminate first-party fraud, and turn manual back-office workflows into loyalty-building moments for customers and members. We’re a Series A startup founded by product leaders from Robinhood and Chime , and we’ve raised over $30M from Emergence, Lightspeed, Primary Ventures, SoFi, and others. We have incredible product market fit, an exceptionally ambitious and kind culture, and our CEO, Shanthi, was recently named to Inc. Magazine’s 2026 Female Founders 500 . Over the past 12 months we’ve more than 10x’ed revenue and we’re just getting started. Location This is a hybrid role based out of our San Francisco, CA or New York, NY office. Our team works in-office time on Mondays, Wednesdays, and Fridays. What You'll Do Develop and maintain reliable backend systems, integrating them with credit card, banking, and merchant platforms for comprehensive workflow chargeback management. Scale and generalize the system for growth, ensuring it is highly configurable and flexible to reduce the time to go live and support a broad range of use cases. Architect and develop robust architectural patterns for microservices. Design and implement core frameworks and libraries for various backend services, promoting code reuse and maintainability. Take ownership of upgrading coding practices, CI/CD pipelines, deployed systems, backend programming languages, and third-party dependencies to enhance system performance and security. Proactively identify areas for improvement in our platform's infrastructure and systems, implementing optimizations that enhance operational efficiency and product quality. Own the end-to-end development and deployment of key features, including decision-making around technology stack and system design to ensure optimal implementation. What You’ve Done Minimum of 6+ years of experience in software development, with at least 2 years focused on using Go or Java in production environments. Demonstrated experience working on platform teams and contributing significantly to system architecture. Led an end-to-end implementation of a key product feature or re-architecture/upgrading of a key platform service. Excellent problem-solving skills with a strong understanding of fundamentals, algorithms, data structures, and industry design patterns. Experience mentoring junior team members and leading project teams as the sole tech lead. Strong communication skills and ability to work effectively in a collaborative team environment. Compensation The base pay range for this role is $170,000 – $220,000 per year. Casap's compensation package includes a competitive base salary benchmarked against real-time market data, as well as equity for all full-time roles. We also offer exceptional benefits, as well as bonuses and commission plans for applicable roles. The listed US-based compensation range is a guideline and may be modified. Final compensation will vary based on market conditions, geographic location, and candidate qualifications, including relevant knowledge, skills, and experience assessed during the interview process. 📈 Start-up equity 🦷 Full health, vision & dental coverage 🩺 One Medical membership 🍽️ Stocked kitchens + weekly lunches 🚍 Commuter benefit 🚠 Team building events & happy hours 🌴 Flexible PTO 💻 Apple equipment + annual home office budget Casap is an equal opportunity employer that supports workplace diversity and does not discriminate on the basis of race, color, religion, gender identity/expression, national origin, age, military service eligibility, veteran status, sexual orientation, marital status, physical or mental disability, or any other protected class. Casap is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities.