About Attain

Klover’s engineering team powers one of the fastest-growing fintech platforms in the U.S., supporting over one million active users each month. Our systems process and move more than $1.5 billion annually, enabling real-time access to financial tools, rewards, and services that help people improve their day-to-day lives.

As part of this team, you’ll help design, build, and scale the systems that underpin Klover’s core products and platform. You’ll work on high-impact, production-grade systems that prioritize reliability, security, and performance, and that integrate with a broad ecosystem of internal and external services. The work you do will directly shape how users interact with Klover’s products, access their money, and experience transparent, low-fee financial services.

Klover engineers collaborate closely with colleagues across backend, frontend, data science, and product teams to deliver scalable, high-quality solutions for a rapidly growing user base. You’ll have the opportunity to work with modern technologies and architectures while helping define and evolve the next generation of inclusive, data-powered financial products—building systems and interfaces that emphasize reliability, privacy, and performance at scale.

Attain Office Hybrid Schedule (where applicable): 

• Chicago, IL & New York, NY: 4 days in-office; 1 day remote

You’ll be a great fit for the role if

• You are excited to build and scale backend systems that support financial products and real-time payments
• You thrive in environments where data integrity, security, and performance are critical
• You are excited to build microservices using Rust and Go
• You have a willingness to learn and teach in a collaborative environment
• You’re eager to leverage and develop using AI tools
• You’ve been complimented on how well you participate in an open feedback environment

What your day to day will look like

• 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

Preferred Qualifications

• 5+ years of experience building backend services in production environments
• Experience in the financial technology, payments, or banking systems industry
• 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)
• Experience with cloud environments such as AWS, GCP, or Azure

We’re excited to hear from you. 

At Attain, we are passionate about finding people to continuously help us grow our organization. We encourage you to apply, even if your experience doesn’t match every detail of the job description. If we don’t see something that immediately fits, we will keep your resume on file for future opportunities.

About Attain

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. 

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. 

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.

Attain Office Hybrid Schedule (where applicable): 

• Chicago, IL & New York, NY: 4 days in-office; 1 day remote

You’ll be a great fit for the role if

• You are excited to build and scale backend systems that support financial products and real-time payments
• You thrive in environments where data integrity, security, and performance are critical
• You are excited to build microservices using Rust and Go
• You have a willingness to learn and teach in a collaborative environment
• You’re eager to leverage and develop using AI tools
• You’ve been complimented on how well you participate in an open feedback environment

What your day to day will look like

• 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

Preferred Qualifications

• 5+ years of experience building backend services in production environments
• Experience in the financial technology, payments, or banking systems industry
• 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)
• Experience with cloud environments such as AWS, GCP, or Azure

We’re excited to hear from you. 

At Attain, we are passionate about finding people to continuously help us grow our organization. We encourage you to apply, even if your experience doesn’t match every detail of the job description. If we don’t see something that immediately fits, we will keep your resume on file for future opportunities.

About Attain

Built for consumers and companies, alike. In a world driven by data, we believe consumers and businesses can coexist. Our founders had a vision to empower consumers to leverage their greatest asset—their data—in exchange for modern financial services. Built with this vision in mind, our platform allows consumers to access savings tools, earned wages and rewards without cost or hidden fees. In exchange, they give permission to use their real-time data for research, insights and targeted advertising.

At Attain, your contribution will help us build a more equitable and efficient data sharing ecosystem—whether helping consumers access modern financial services or businesses leverage data to achieve better outcomes. You’ll have the opportunity to work directly with hands-on leaders and mission-driven individuals everyday.

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
• Chicago, IL & New York, NY: 4 days in-office; 1 day remote

About the role 

As the Lead Software Engineer supporting Frisbee Rewards, this role will serve as the backend technical anchor for the Frisbee consumer application, while also acting as the execution lead across Attain’s mobile engineering teams.

The mobile application for Frisbee Rewards, has an intentionally back-end driven infrastructure. Business logic, feature gating and much of the user experience configuration (i.e. business logic, feature gating, component arrangement and screen composition) is controlled by backend services. Mobile clients are designed to be thin rendering layers that interpret structured data and configuration delivered by the backend. This is an exciting opportunity for a senior developer who is excited about growing into a broader technical leadership role that will make an impact cross functionally. 

You’ll be a great fit for the role if

• You bring strong backend engineering experience and enjoy owning systems end to end, including making pragmatic architectural decisions in ambiguous problem spaces
• You’re excited to design and build backend services that orchestrate product behavior, business logic, and user experience
• You enjoy working closely with mobile engineers and are comfortable defining APIs, schemas, and data models that power data-driven mobile clients
• You value clear communication, strong engineering judgment, and constructive feedback
• You’re interested in growing into broader technical leadership over time
  

What a typical week will look like

• Design, build, and own backend services (primarily Rust-based microservices) that power the Frisbee consumer experience
• Own backend systems responsible for business logic, feature flags, and UX configuration that control mobile behavior and layout
• Define and maintain clean, well-documented APIs and client-server contracts used by iOS and Android applications
• Partner closely with mobile engineers to enable fast, predictable execution and unblock delivery
• Act as technical owner for major initiatives from design through production
• Provide architectural guidance and code review across backend and mobile codebases
• Collaborate with Product and Design to translate customer needs into scalable systems
• Participate in planning, prioritization, and delivery with a strong bias toward execution
• Occasionally contribute to mobile codebases when needed
• Help establish engineering standards and raise the technical bar across the team

Preferred Qualifications

• 6+ years of experience building and owning backend systems in production environments
• Strong experience designing APIs, service boundaries, and data models
• Experience evolving complex systems and working with microservice or service-oriented architectures
• Experience operating systems in cloud environments (AWS, GCP, or Azure)
• Experience working closely with iOS and Android engineering teams
• Familiarity with backend- or configuration-driven client architectures
• Experience with gRPC, protobuf, or GraphQL
• Experience with relational databases
• Understanding of mobile performance characteristics and constraints
• Exposure to React Native
• Experience integrating third-party SDKs (e.g., analytics, scanning, CRM)

We’re excited to hear from you. 

At Attain, we are passionate about finding people to continuously help us grow our organization. We encourage you to apply, even if your experience doesn’t match every detail of the job description. If we don’t see something that immediately fits, we will keep your resume on file for future opportunities.