I’m a software engineer specializing in building scalable web applications and backend systems using modern technologies like React, Node.js, and TypeScript. I have a strong focus on performance, clean architecture, and user experience. Passionate about solving real-world problems through technology, I enjoy turning complex ideas into reliable, impactful products.

Daniel Iliescu

I’m a software engineer specializing in building scalable web applications and backend systems using modern technologies like React, Node.js, and TypeScript. I have a strong focus on performance, clean architecture, and user experience. Passionate about solving real-world problems through technology, I enjoy turning complex ideas into reliable, impactful products.

Available to hire

I’m a software engineer specializing in building scalable web applications and backend systems using modern technologies like React, Node.js, and TypeScript. I have a strong focus on performance, clean architecture, and user experience. Passionate about solving real-world problems through technology, I enjoy turning complex ideas into reliable, impactful products.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent

Work Experience

Senior Software Engineer at DocuSign
August 1, 2021 - Present
Led the Intelligent Agreement Management (IAM) initiative by building extensible, secure developer and AI-powered features in DocuSign's contract management suite. Spearheaded the extensibility platform enabling external developers to publish and consume contract automation extensions using Azure, Kubernetes, Docker, Istio, Node.js, TypeScript, Prisma, and Protobuf. Designed and built React-based extension management UIs with dynamic form rendering and RBAC enforcement, allowing tenants to configure, install, and audit extension usage. Architected robust app versioning flows supporting upgrades, rollbacks, consent management, and retention policies exposed through APIs and React admin views. Developed secret/OAuth token management backend supporting multiple grant types and enterprise secrets, with React portals enabling tenant-level control of credentials, expiration logic, and audit histories. Integrated Golang-based metadata processing services for extension validation pipelines and
Software Engineer at Envestnet
August 1, 2021 - September 3, 2025
Led full-stack efforts integrating third-party data providers and institutions into a $1.9 trillion AUM wealth management platform. Created reusable UI modules in React to visualize document vault search results and integration health metrics, tied to backend services written in .NET Core and Golang. Built React-based financial dashboards for advisors using TypeScript, Redux, and RESTful APIs, displaying personalized financial wellness scores and predictive insights using Yodlee FinApps and FinCheck data. Designed microservices in .NET Core and Go to aggregate third-party data and expose structured analytics via REST and GraphQL APIs consumed by React dashboards. Maintained and extended Ruby on Rails internal dashboard with React components integrated for job monitoring and report generation, using Webpack and Sidekiq for background job handling. Refactored legacy front-end logic into modular React components with form validation, client-side filtering, and secured data handling in acc
Software Engineer at Siemens Healthineers
February 1, 2019 - September 3, 2025
Part of the ultrasound imaging team for the ACUSON Sequoia platform, modernizing high-risk imaging systems for clinical applications. Modernized a legacy x86 assembly and “C with classes” codebase to modern C++11/14 for key modules such as SieScape (panoramic imaging) and eSieTouch (tissue elasticity computation). Developed safety-critical watchdog systems for biopsy workflows using C++ and CUDA, including live alerts for real-time rendering issues during invasive scans. Built diagnostic portals in React and C# that retrieved hardware logs from embedded ultrasound components and presented failure data for clinical technicians. Authored diagnostic services in Python and web interfaces for internal troubleshooting of transducers, USB controllers, and imaging subsystems. Led internal training sessions on C++11/14 and mentored engineers in adopting more modular, testable, and modern development practices.
Senior Software Engineer at DocuSign
August 1, 2021 - Present
Led the end-to-end developer experience for embedded app extensions: built embedded SDKs, demos, and React UI playgrounds; architected API backends with multi-tenant OAuth/token management and RBAC; implemented React/TypeScript UI with GraphQL and Material UI; delivered observability dashboards and end-to-end testing tooling; mentored engineers and contributed to CI/CD; integrated with Azure-based services (Cosmos DB, Blob Storage, Event Hub) and RBAC-enabled backends.
Software Engineer at Investnet
August 1, 2021 - October 7, 2025
Led full-stack efforts to integrate third-party data providers and institutions into a $1.9 trillion AUM wealth-management platform; designed reusable React/TypeScript UI components for data visualization; built backend services in Go and Node.js with GraphQL/REST APIs; leveraged Azure data services (Cosmos DB, Blob Storage, Event Hub) and implemented RBAC-enabled UI; contributed to documentation, SDKs, demos, and extension testing; mentored engineers and contributed to CI pipelines.
Software Engineer at Siemens Healthineers
February 1, 2019 - October 7, 2025
Modernized legacy x86 assembly and C++ codebase to modern C++11/14 for high-risk imaging systems; developed modules for tissue elasticity computation and image processing; built safety-critical watchdogs for biopsy workflows; delivered diagnostic portals and troubleshooting UI in React and C#; mentored junior engineers and contributed to unit testing and documentation.
Senior Software Engineer at DocuSign
August 1, 2021 - October 30, 2025
Lead IAM initiative: building extensible, secure developer and AI-powered features into DocuSign’s platform; spearheaded external developer extensions using Azure, Cosmos DB, Kubernetes and OAuth/token management; delivered end-to-end developer-facing extension scenarios with React-based UI, Node.js services, and Azure infrastructure; mentored engineers, improved onboarding, and authored platform docs and demos.
Software Engineer at Siemens Health
February 1, 2019 - February 1, 2019
Part of the ultrasound imaging team for the ACUSON Sequoia platform, modernizing high-risk imaging systems for clinical applications; redesigned legacy front-end/back-end components; led safety-critical diagnostics portals; trained engineers; contributed to live demos and testing.
Software Engineer at Envestnet
August 1, 2021 - August 1, 2021
Led full-stack efforts integrating third-party data providers and institutions into a $1.9 trillion AUM wealth-management platform; built reusable UI modules to visualize data vaults; designed dashboards for financial wellness scoring; delivered end-to-end developer-facing extensions using React, Node.js, REST, and Azure; improved onboarding via microservices.

Education

B.S in Computer Science & Software Engineering at University of Washington Bothell
September 1, 2010 - June 1, 2014
B.S. in Computer Science & Software Engineering at University of Washington Bothell
September 1, 2010 - June 1, 2014
B.S. in Computer Science & Software Engineering at University of Washington Bothell
September 1, 2010 - June 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Healthcare, Professional Services