Senior Backend Engineer, Payments

Attain
Chicago, IL

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):


  • 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

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.

Posted 2025-11-25

Recommended Jobs

Prep Girls Hoops Scout - Event Specific (Illinois)

Prep Network
Chicago, IL

About Prep Network Prep Network () operates websites -- 100+ in total -- aimed at maximizing visibility and value for high school athletes at all levels. Our scouts provide content, player ranking…

View Details
Posted 2026-01-08

Sales Executive, Personal Insurance

Travelers
Springfield, IL

Who Are We? Taking care of our customers, our communities and each other. That’s the Travelers Promise. By honoring this commitment, we have maintained our reputation as one of the best property ca…

View Details
Posted 2025-12-24

New Owner Sr. Sales Manager, SI Chicago

Wyndham Destinations
Illinois

We Put the World on Vacation Travel + Leisure Co. is the world’s leading vacation ownership and travel membership company, with a dynamic and growing portfolio of resort, travel club, and lifestyl…

View Details
Posted 2025-12-31

Retail Branch Manager I

Woodforest National Bank
Peoria, IL

Take the next step toward your new career today! Become a part of the diverse and inclusive team within our nationally recognized award-winning Bank that is one of the strongest in the nation. Woodf…

View Details
Posted 2025-12-30

HTML Tutors (Instant)

Varsity Tutors, a Nerdy Company
Evanston, IL

The Varsity Tutors Live Learning Platform has thousands of students looking for immediate online HTML help nationally. As an Instant Tutor on the Varsity Tutors Platform, you'll have the flexibility t…

View Details
Posted 2026-01-01

Registered Nurse Outpatient-Delnor Cancer Center Part Time Days

Delnor Hospital
Geneva, IL

The salary range for this position is $34.50 - $55.20 (Hourly Rate) Placement within the salary range is dependent on several factors such as relevant work experience and internal equity. For positi…

View Details
Posted 2025-12-23

Senior Data Scientist

Gliacell Technologies
Aurora, IL

***An active or rein-statable TS/SCI with Polygraph security clearance is REQUIRED. Please do not apply if you currently do not possess this level of clearance.*** Are you a Senior Data Scientist …

View Details
Posted 2025-11-25

Ford Diesel Technician

TalentLogistix
Schaumburg, IL

We are seeking an experienced Ford Certified Diesel Technicians  to join our service team. The ideal candidate will be responsible for diagnosing, repairing, and maintaining Ford diesel vehicles …

View Details
Posted 2026-01-09

ServiceNow Service Portal Subject Matter Expert

GDIT
La Grange, IL

Responsibilities for this Position Location: Any Location / Remote Full Part/Time: Full time Job Req: RQ210576 Type of Requisition: Regular Clearance Level Must Currently Possess:…

View Details
Posted 2026-01-08