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# Principal Software Engineer (APIs)

- **Company:** The Testing Site
- **Location:** Wilmington, DE, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Computer Engineering, Encompass, Software Engineering, Data Streaming, Management of Software Versions, Delivery Pipeline, Mttr, Event Driven Architecture, Information Technology, Data Lineage, Apache Kafka, Graphql, Api Gateway, Grpc
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25197_29cb01d21b1798c8f2b6d03be213d03c

## About the Role

* Formal training or certification on software engineering concepts and 10+ years applied experience
 * Deep expertise designing and governing REST/GraphQL/gRPC APIs and event-driven architectures at enterprise scale.
 * Hands-on Encompass LOS experience including Developer Connect APIs, SDK/plugins, business rules, and pipeline automation.
 * Strong mortgage domain knowledge including MISMO 3.4+, UCD, HMDA, DU/LP workflows, and TRID/RESPA impacts
 * Proficiency with Kafka or equivalent streaming platforms and robust messaging patterns with DLQs and idempotency.
 * Excellent communication and mentoring skills with a BS in CS or related field
 * Experience in Computer Science, Computer Engineering, Mathematics, or a related technical field

## Description

* Own the design integration and API strategy (REST/GraphQL/gRPC, event-driven) with clear versioning, security, and lifecycle standards.
 * Define reusable integration patterns and canonical data contracts aligned to MISMO to ensure consistency and reuse.
 * Lead design reviews and maintain reference architectures and ADRs across domains, guiding strategic design decisions.
 * Ensure designs meet non-functional requirements for security, resiliency, performance, scalability, cost, and operability.
 * Design and oversee Encompass LOS integrations and customizations using Developer Connect, SDK, and plugins.
 * Orchestrate Encompass data flows with pricing engines, DU/LP, credit, appraisal, title, eClose, CRM, and document systems.
 * Drive platform capabilities for API gateways, event streaming, identity/authorization, webhook integration etc
 * Establish SLIs/SLOs, resiliency patterns, and telemetry standards to improve reliability and reduce MTTR.
 * Mentor engineers and product partners on strategic design, integration best practices, and platform-thinking.
 * Design and ideate PoCs experiment andand enforce governance for schema versioning, backward compatibility, and data lineage.