Senior Software Engineer II Job Seattle area,Washington USA,Software Development

At Compass, our mission is to help everyone find their place in the world. Founded in 2012, we’re revolutionizing the real estate industry with our end‑to‑end platform that empowers residential real estate agents to deliver exceptional service to seller and buyer clients.

At Compass International Holdings (CIH), real estate transactions are powered by a complex web of referral programs, franchise relationships, and monetization agreements — each requiring precise attribution and business rule enforcement. The Referral & Monetization team owns the business rules, attribution pipelines, and tracking systems for brokerages’ Real Estate's referral programs, ensuring every referred lead is correctly attributed to the right program, franchise, and fee structure.

As a Senior Software Engineer on this team, you will design and build the systems that power the CIH referral rules engine, franchise lead attribution pipeline, lead monetization model, and the external partner API used by AST broker matching. Your work directly impacts revenue accuracy and the integrity of referral economics across a national franchise network.

At Compass, You Will:

Design and build the referral program rules engine — the system that determines which referral program applies to a given lead, based on brokerage, franchise, geography, and agent profile
Own the franchise lead attribution pipeline — tracking which franchise or brokerage sourced a lead and ensuring accurate revenue attribution across Anywhere's broker network
Build and evolve the lead monetization model — the set of rules that govern how leads are priced, attributed, and reconciled across programs
Maintain and extend the broker matching partner API — an external‑facing integration used to match consumers with brokers at scale, with high reliability requirements
Build referral program reporting for brokers — self‑serve dashboards and data pipelines that give brokers visibility into their referral performance and attribution
Design robust, auditable data pipelines that support financial reconciliation and compliance requirements
Operate in a scalable engineering culture that leverages modern principles of decoupled systems and automated CI/CD/testing/monitoring

What We Look For:

BS in Computer Science, Software Engineering, or equivalent practical experience
7+ years of experience developing comprehensive, well‑tested, and high‑performance software applications with languages such as Go, Java
Experience with gRPC, Thrift, and other server‑to‑server communication protocols
Experience with Kafka and event‑driven systems — particularly for building reliable, ordered, and auditable data pipelines
3+ years using AWS / cloud technologies
High proficiency designing and implementing microservices that are well tested, fault tolerant, and scalable
Understanding and adherence to industry‑standard best practices in software development and architecture
Believes in good software development requiring thorough testing, robust resiliency features, effective monitoring capabilities, comprehensive documentation, and close collaboration
Experience with Scrum/Agile development methodologies
Strong critical thinking skills, great communication skills, and passion for delivering operational excellence

Preferred Qualifications:

Rules engine or business logic systems: Experience designing and implementing rules engines, workflow engines, or policy evaluation systems where business rules change frequently and correctness is non‑negotiable (e.g. pricing engines, eligibility checkers, entitlement systems)
Revenue attribution or financial data pipelines: Hands‑on experience building attribution systems that track the origin of a transaction across a multi‑step funnel — particularly where attribution…