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Senior Backend Engineer, Payments

Attain

Salary not specified
Dec 29, 2025
Chicago, IL, US • Redwood City, CA, US
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The Klover Backend Engineering team at Attain is looking to solve the problem of powering one of the fastest-growing consumer fintech apps in the U.S., with over one million active users every month, and processing and moving more than $1.5 billion annually.

Requirements

  • Experience building backend services in production environments
  • Familiarity with compliance, security, and data privacy standards (e.g., SOC 2, PCI DSS, GDPR)
  • Experience designing transactional and event-driven systems for payments, reconciliation systems, or ledger-like applications
  • Familiarity with microservice or Service-oriented Architecture
  • Experience using gRPC, protobuf, or GraphQL
  • Expert knowledge of SQL and experience designing data models for financial data integrity
  • Experience with message queues or event streams (e.g., Kafka, RabbitMQ)

Responsibilities

  • Build and evolve microservices that handle high-volume financial and transactional data
  • Design and implement APIs that securely connect to third-party payment processors, banks, and fintech partners
  • Write thoughtful & quality code that is readable, testable, and easily maintainable
  • Develop data-driven services that power account management, transaction history, and financial insights
  • Strive for excellent development practices and careful code architecture that is built around rapid releases
  • Work cross-functionally with backend, mobile, and product teams to consistently release high-quality, customer-focused financial features
  • Adhere to, and improve upon, our agile process through requirement documents, sprint retrospectives, and other regular cadence meetings

Other

  • Attain Office Hybrid Schedule (where applicable): Redwood City, CA: Mondays (in-office for stand-ups, all-hands) and choice of three days between Tues-Friday
  • 4 days in-office; 1 day remote for Chicago, IL & New York, NY
  • 5+ years of experience building backend services in production environments
  • Willingness to learn and teach in a collaborative environment
  • Eager to leverage and develop using AI tools