About Attain

Built for consumers and companies, alike. 

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.

About the role

Attain is seeking a Senior/Staff Data Scientist to support the growing needs of our suite of B2C financial services. This role will be highly hands-on, focused on building, improving, validating, and deploying predictive models that power consumer decisioning and business optimization across our app portfolio.

You will work on advanced machine learning and statistical modeling problems, including cash-flow based credit decisioning for our earned wage advance product, Klover, as well as consumer behavior modeling, transaction categorization, paycheck detection, fraud scoring, churn prediction, and other high-impact predictive modeling use cases. The ideal candidate combines strong quantitative fundamentals with practical experience building models and analytical systems from scratch.

Attain Office Hybrid Schedule: 

• Chicago, IL: 4 days in-office; 1 day remote

What a typical week might look like

• Hands-on development of ML and statistical models at the core of our EWA product, with a focus on fast, rigorous, and high-quality execution
• Build and improve predictive models across consumer decisioning, consumer behavior modeling, fraud, churn, transaction intelligence, and other business-critical use cases
• Own the full model development lifecycle, including data exploration, feature engineering, model training, validation, deployment, monitoring, and retraining
• Develop reusable modeling pipelines, analytical tools, and production-quality code to support scalable data science work
• Apply strong statistical and mathematical judgment to model evaluation, calibration, robustness testing, and business impact measurement
• Collaborate with data analysts, engineers, product managers, and business stakeholders to deliver ML models with quality, efficiency, and precision
• Identify new areas where data science, predictive modeling, and optimization can improve product and business outcomes

Preferred Qualifications 

• 5+ years of direct experience working as a Data Scientist, Machine Learning Scientist, Model Developer, Applied Scientist, Economist, or similar role on relevant business problems
• Strongly preferred: Master's, or Ph.D. in a STEM field such as Computer Science, Statistics, Economics, Mathematics, Engineering, Physics, Operations Research, or a related quantitative field
• Demonstrated ability to apply critical thinking, causal inference, abstract reasoning, and generalization to complex, ambiguous business and technical problems
• Strong expertise developing, validating, deploying, and monitoring machine learning models in production
• Experience with AI/ML-assisted development tools and MLOps practices, including experience working with large language models (LLMs) or autonomous agents for code generation and model refinement
• Experience with predictive modeling, consumer behavior modeling, risk modeling, credit decisioning, fraud modeling, churn modeling, or other high-impact applied ML use cases
• Solid foundation in statistics, probability, mathematics, and machine learning fundamentals
• Strong Python coding skills, with the ability to build models, pipelines, and analytical tools from scratch
• Strong SQL skills and experience working with large, messy, real-world datasets
• Experience with feature engineering, model evaluation, calibration, monitoring, retraining, and model performance diagnostics
• Experience with cloud computing services or platforms; GCP preferred
• Familiarity with version control, peer code review, and collaborative software development practices
• Demonstrated ability to learn new technologies, applications, and modeling approaches quickly
• Willingness to roll up your sleeves and wear multiple hats across data science, analytics, modeling, and technical execution based on business needs
• Strong written and verbal communication skills, including the ability to explain technical topics to both technical and non-technical audiences

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

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.

You’ll be a great fit for the role if

• You love data and automating processes
• You have a willingness to learn and teach in a collaborative environment
• You’ve been complimented on how well you participate in an open feedback environment

What your day to day will look like

• Use new and modern technology to build new features and services across our microservice architecture
• Work with our internal cloud databases and data warehouses
• Collaborate with our product team to create a robust data catalog and dictionary
• Build alerts and observability dashboards to monitor the health and integrity of our data
• Write thoughtful & quality code that is readable, testable and easily maintainable
• Strive for excellent development practices and careful code architecture that is built around rapid releases
• Work cross-functionally with all mobile and backend engineers and product teams to consistently release high-quality, customer-focused features and measure their impact
• Adhere to, and improve upon, our processes through requirement documents, sprint retrospectives and other regular cadence meetings

Preferred Qualifications

• 6+ years of experience building backend services or data automation
• Experience in the financial tech industry is a plus
• Experience with Python
• Experience with tools like Airflow or GCP Workflows
• Experience with working with relational databases
• Experience with cloud environments such as AWS, GCP, or Azure
• Experience using gRPC, protobuf, or GraphQL is a plus

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.

Part of Attain’s portfolio of mobile applications, Merryfield is a leading performance marketing platform that connects better-for-you brands with a premium audience, actively seeking high-quality, clean-label products. The platform offers targeted promotions, flexible budget options and detailed reporting to help brands grow their reach and engage loyal customers.

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 architect and build microservices using Node.js and Go
• You love working closely with product teams to identify the best way to deliver great customer experiences and pursue new revenue opportunities
• You are energized by working in high-throughput environments where stability, speed, and customer experience are equally important.
• You have a willingness to learn and teach in a collaborative environment
• You’ve been complimented on how well you participate in an open feedback environment

What your day to day will look like

• Use new and modern technology to build new features and services across our microservice architecture
• Write thoughtful & quality code that is readable, testable, and easily maintainable
• Create data-driven and stable APIs for our mobile apps to consume
• Strive for excellent development practices and careful code architecture that is built around rapid releases
• Work cross-functionally with all mobile and backend engineers, and product teams to consistently release high-quality, customer-focused features
• Adhere to, and improve upon, our agile process through requirement documents, sprint retrospectives, and other regular cadence meetings

Preferred Qualifications

• 6+ years of experience building backend services with 2+ of those years in a technical leadership capacity (mentoring junior engineers, scoping technical projects, etc.) 
• Experience with Microservice or Service-oriented Architectures
• Experience building within the Node.js ecosystem
• Experience using gRPC, protobuf, or GraphQL
• Experience managing AWS environments (GCP is a plus)
• Experience with working with relational databases
• Experience with message queues or event streams
• Experience in the financial and rewards tech industry is a plus
• Experience proactively working with modern AI-enhanced development tools (e.g., Claude Code, Cursor, etc.) and a curiosity for emerging AI workflows

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

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.

About the Role

As a Senior/Staff Site Reliability Engineer, you will play a critical role in building out and maintaining the infrastructure that powers all of our systems, as well as all of the supporting tools to ensure that those systems are running smoothly. You will work closely with nearly every engineering team at Attain, in helping to ensure that our systems are operating at peak efficiency, and preparing us to handle the scale of our future growth.

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

What a typical week might look like

• Write Terraform modules for deploying infrastructure resources via our GitLab pipelines
• Develop Helm charts for deploying services and jobs in our Kubernetes cluster
• Define metrics, network policies, and routing rules for our Istio service mesh
• Monitor and maintain our GCP BigQuery and Spanner databases
• Pipe metrics to our Google-managed Prometheus instance and build out Grafana dashboards and alerts to increase visibility on our systems
• Experiment with GCP offerings, 3rd party vendors, and open-source tools to further automate and secure day-to-day operations
• Leverage latest and greatest LLM models in developing infrastructure and tooling
• Pair with engineering leads to instrument and monitor critical functionality
• Add automation to both existing and new systems to reduce our reliance on manual processes
• Participate in architecture design and capacity planning discussions to ensure that our systems are scalable, maintainable, reliable, and secure
• Build, maintain, and improve our CI/CD pipeline

You’ll be a great fit for the role if

• You are comfortable wearing many hats
• You have a willingness to learn and teach in a fast-paced, collaborative environment
• You have a strong desire to automate things
• You readily provide constructive feedback, and also proactively seek feedback to improve yourself
• You like to get your hands dirty and tinker with/stress test new technologies

Preferred Qualifications

• 6+ years of experience building and maintaining large-scale cloud-native infrastructure (AWS and/or GCP)
• Experience working with the containerization technologies Docker, Kubernetes, and Istio or a similar service mesh technology
• Experience with SQL database technologies such as MySQL,Google BigQuery, and Google Spanner
• Experience with stream technologies such as Kafka and Amazon Kinesis
• Experience with pub sub technologies such as AWS SNS and Google Pub/Sub
• Experience with serverless computing technologies such as AWS Lambda and Google Cloud Functions/Google Cloud Run
• Experience with infrastructure-as-code tools such as Terraform
• Experience with observability tools such as Datadog, Prometheus, and Grafana
• Strong computer science and software engineering fundamentals
• Experience with SOC2 Compliance processes and requirements

We are 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 on the job description. If we don’t see something that immediately fits, we will keep your resume on file for future opportunities.