Staff Engineer, Software

OneMain Financial

. Design, develop, and maintain Drools (KIE) rules using DRL, Decision Tables, and Rule Templates .

Posted 10/23/2026full-timeRemote • New York • United StatesLead💰 $150,000 - $170,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in Drools (KIE) rule design and development, with a strong focus on optimizing rule execution for performance and compliance. Proficient in translating complex business policies into maintainable and explainable rules within decisioning systems.

Highest-signal resume keywords

Drools/KIE ExperienceJava ProficiencyRule Performance TuningBusiness Rules Management Systems (BRMS)Cloud Platforms Exposure

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

DroolsKIEJavaSpringSpring BootDRLDecision TablesRule TemplatesRule Performance TuningDebugging

Soft Skills

MentoringTechnical Discussion ParticipationTroubleshooting

Tools & Technologies

CI/CD PipelinesApache Pekko

Industry Keywords

Business RulesDecisioning SystemsUnderwritingRegulatory ComplianceAudit Requirements

Tech Stack

Tools & technologies

ApacheCloudJavaSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Design, develop, and maintain Drools (KIE) rules using DRL, Decision Tables, and Rule Templates
Optimize rule execution for low latency and high throughput, including rule salience, agenda groups, rule flows, and conflict resolution
Ensure decisions are deterministic, explainable, and auditable for regulatory and audit requirements
Contribute to decisioning and rules architecture, including reusable rule sets, versioning, and controlled rollout
Participate in design reviews and technical discussions related to rule design and platform evolution
Develop unit tests and scenario-based tests across multiple decision paths
Troubleshoot production issues related to rule execution and support deployments across development, QA, and production environments
Serve as a Drools and business rules subject-matter expert and mentor junior engineers
Establish and enforce standards for rule authoring, documentation, testing, and maintainability
Capture business policies as maintainable Drools rules
Support fast, consistent, explainable, reliable, scalable, and regulator-ready decisions

Requirements

What you’ll need

10+ years of software engineering experience
7+ years of hands-on experience with Drools/KIE
Strong proficiency in Java and Spring/Spring Boot
Experience with DRL, Decision Tables, and Rule Templates
Experience with stateless and stateful KIE sessions
Experience with rule performance tuning and debugging
Experience building or supporting policy-driven or decisioning systems
Strong understanding of business rules management systems (BRMS)
Exposure to cloud platforms and CI/CD pipelines
Experience in designing, building, and maintaining business rules for underwriting and decisioning platforms
Experience translating credit and risk policies into high-performance, explainable Drools rules
Apache Pekko orchestration layer experience is a plus

Benefits

Comp & perks

Health and wellbeing options including medical, prescription, dental, vision, hearing, accident, hospital indemnity, and life insurances
Up to 4% matching 401(k)
Employee Stock Purchase Plan (10% share discount)
Tuition reimbursement
Paid time off (15 days’ vacation per year, plus 2 personal days, prorated based on start date)
Paid sick leave as determined by state or local ordinance, prorated based on start date
Paid holidays (7 days per year, based on start date)
Paid volunteer time (3 days per year, prorated based on start date)
Competitive compensation program based on individual and company performance
Flexible work arrangements
Career development opportunities