Staff Backend Engineer, Payments, Consumer Apps - Klover

<p><strong>About Attain</strong></p> <p>The Klover Backend Engineering team powers one of the fastest-growing consumer fintech apps in the U.S., with over one million active users every month. Our systems process and move more than $1.5 billion annually - enabling real-time access to earned wages, rewards, and financial tools that help consumers improve their day-to-day lives. </p> <p>As part of this team, you’ll design and scale the backend services that drive Klover’s payments and data infrastructure. You’ll work on high-availability systems that connect with financial institutions and payment processors, ensuring secure, compliant, and lightning-fast transactions. The work you do will directly impact our users’ ability to access their money instantly, earn meaningful rewards, and experience transparent, fee-free financial services. </p> <p>Klover engineers collaborate closely across product, data, and mobile teams to deliver reliable, high-performance features that meet the demands of a large, growing user base. You’ll have the opportunity to work with modern technologies (including Rust microservices and event-driven systems) while shaping the next generation of inclusive, data-powered financial products. You’ll design APIs and microservices that connect financial institutions, payment processors, and data platforms, all while ensuring reliability and privacy at scale.</p> <p><strong><em>Attain Office Hybrid Schedule (where applicable): </em></strong></p> <ul> <li><em>Redwood City, CA: Mondays (in-office for stand-ups, all-hands) and choice of three days between Tues-Friday</em></li> <li><em>Chicago, IL New York, NY: </em><em>4 days in-office; 1 day remote</em></li> </ul> <h4><strong>You’ll be a great fit for the role if</strong></h4> <ul> <li>You are excited to build and scale backend systems that support financial products and real-time payments</li> <li>You thrive in environments where data integrity, security, and performance are critical</li> <li>You are excited to build microservices using Rust and Go</li> <li>You have a willingness to learn and teach in a collaborative environment</li> <li>You’re eager to leverage and develop using AI tools</li> <li>You’ve been complimented on how well you participate in an open feedback environment</li> </ul> <p><strong>What your day to day will look like</strong></p> <ul> <li>Build and evolve microservices that handle high-volume financial and transactional data</li> <li>Design and implement APIs that securely connect to third-party payment processors, banks, and fintech partners</li> <li>Write thoughtful quality code that is readable, testable, and easily maintainable</li> <li>Develop data-driven services that power account management, transaction history, and financial insights</li> <li>Strive for excellent development practices and careful code architecture that is built around rapid releases</li> <li>Work cross-functionally with backend, mobile, and product teams to consistently release high-quality, customer-focused financial features</li> <li>Adhere to, and improve upon, our agile process through requirement documents, sprint retrospectives, and other regular cadence meetings</li> </ul> <p><strong>Preferred Qualifications</strong></p> <ul> <li>5+ years of experience building backend services in production environments</li> <li>Experience in the financial technology, payments, or banking systems industry</li> <li>Familiarity with compliance, security, and data privacy standards (e.g., SOC 2, PCI DSS, GDPR)</li> <li>Experience designing transactional and event-driven systems for payments, reconciliation systems, or ledger-like applications</li> <li>Familiarity with microservice or Service-oriented Architecture</li> <li>Experience using gRPC, protobuf, or GraphQL</li> <li>Expert knowledge of SQL and experience designing data models for financial data integrity</li> <li>Experience with message queues or event streams (e.g., Kafka, RabbitMQ)</li> <li>Experience with cloud environ ... (truncated, view full listing at source)