Daniel Iliescu

Co-architected and built Docusign's extensibility platform from inception, enabling developers to publish extensions to the Docusign App Center. • Managed 9 microservices in an Nx monorepo with gRPC for inter-service communication and RESTful endpoints for public access, built on Azure (Cosmos DB, Blob Storage, Service Bus, Event Hub), Docker, Kubernetes, Istio, Node.js with TypeScript, Protobuf, and Prisma. • Led the architecture and implementation of 7 major customer-facing features, 4 of which required STRIDE threat models with supporting data flow diagrams, presented to and reviewed by security engineers. • Architected and implemented versioning infrastructure supporting 33+ first-party apps, including upgrade/rollback mechanics, data retention, immutability, consent tracking, and audit logging. • Implemented a release pipeline on Azure DevOps with build validation, automated testing, security scanning, multi-stage promotion, and approval gates, enabling developers to publish apps to the Docusign App Center directly from a GitHub release. • Built services to manage OAuth 2.0 credentials and tokens with lifecycle handling for expiration, rotation, and re-authorization, supporting multiple grant types and enterprise-provided secrets that enabled high-value integrations with 20+ partners including Microsoft, Google, Salesforce, and Stripe. - Developed and maintained the platform's observability infrastructure: telemetry instrumentation, Grafana dashboards, Prometheus metrics, OpenTelemetry tracing, automated alerting, and on-call incident triggering. • Collaborated with internal teams, external partners, and guest developers on platform integration, and regularly presented feature demonstrations and authored technical documentation for both engineering and stakeholder audiences. • Mentored 2 junior developers through pair programming, code review, and career guidance, serving as their primary technical mentor during their first years on the team.

Integrated external systems and financial institutions with the Tamarac financial trading and reporting platform managing trillions of dollars in assets. • Developed full-stack features including .NET Core microservices, RESTful web services, and a unified C# integration backend. • Built microservices and React-based visualizations for financial wellness reporting, presenting health metrics through dynamic, data-driven dashboards. • Implemented OAuth 2.0 and SAML-based integrations enabling Envestnet users to securely connect to accounts on external financial platforms, including a federated document vault for browsing and searching financial documents across providers. • Rearchitected business logic from legacy T-SQL stored procedures into .NET Core services, decoupling application logic from the database layer and improving testability and maintainability. • Dramatically increased code coverage of legacy components from 0% to over 90% with hundreds of Jest and NUnit unit and integration tests.

Developed ultrasound imaging software for the ACUSON Sequoia platform in C++, C++/CLI, C#, and CUDA. • Rearchitected a 25K+ line C and x86-64 assembly legacy codebase into modern C++ (11/14), including SieScape (panoramic ultrasound imaging) and eSie Touch (tissue deformation computation). • Built hazard-designated software for high-risk ultrasound modes to ensure regulatory compliance, including an imaging watchdog that alerts clinicians to image rendering failures during invasive, ultrasound-guided biopsies. • Selected as code quality champion, responsible for updating the C++ coding standards across the organization and delivering technical presentations to drive adoption of modern C++ (11/14/17) best practices. • Developed diagnostic software in C++, C#, and Python for field technicians to troubleshoot ultrasound hardware at the firmware and device-driver level, with web services for automated issue reporting a

Class: CPROGRM 713 - C++ Programming: Advanced Evaluated student assignments in advanced C++ programming, providing detailed feedback and guidance on complex concepts.

Capstone Project: Multi-User Authentication Module for Ultrasound Systems Advisor: Dr. Min Chen Designed and developed a role-based, multi-user authentication module for ultrasound systems, implementing RBAC with LDAP integration, Windows Client Impersonation, credential security hardening, and penetration testing to satisfy Department of Defense requirements. Deployed on the SC2000 and Compass platforms in partnership with Siemens Healthcare.