Drools Developer

Senior Drools Engineer - Credit Cards Platform

We are seeking a Senior Drools Engineer to design, build, and maintain business rules for a largescale underwriting and decisioning platform. This role focuses on translating complex credit and risk policies into highperformance, explainable Drools rules that power realtime decisions.

Key Responsibilities

Design, develop, and maintain Drools (KIE) rules using DRL, Decision Tables, and Rule Templates to implement complex underwriting, eligibility, and policy logic

Optimize rule execution for low latency and high throughput, including management of rule salience, agenda groups, rule flows, and conflict resolution

Ensure decisions are deterministic, explainable, and auditable, meeting regulatory and audit requirements

Contribute to the overall decisioning and rules architecture, designing rule sets for reusability, versioning, and controlled rollout

Participate in design reviews and technical discussions related to rule design and platform evolution

Develop unit tests and scenariobased tests to validate rule behavior across multiple decision paths

Troubleshoot production issues related to rule execution and support deployments across development, QA, and production environments

Act as a subjectmatter expert for Drools and business rules best practices, mentoring junior engineers

Establish and enforce standards for rule authoring, documentation, testing, and maintainability

Required Qualifications

7+ years of software engineering experience

4+ years handson experience with Drools / KIE

Strong proficiency in Java and Spring / Spring Boot

Experience in building a lightweight orchestration layer using Apache Pekko is a plus

Deep experience with:

DRL, Decision Tables, Rule Templates

Stateless and stateful KIE sessions

Rule performance tuning and debugging

Experience building or supporting policydriven or decisioning systems

Strong understanding of business rules management systems (BRMS)

Exposure to cloud platforms and CI/CD pipelines

What Success Looks Like

Business policies are accurately captured as maintainable Drools rules

Decisions are fast, consistent, and explainable

Rule changes can be made confidently without impacting platform stability

The rules layer is reliable, scalable, and regulatorready