# Ronn Jacob > Software Engineer II at Yahoo! Location: San Francisco Bay Area, United States Profile: https://flows.cv/ronn Currently working as a full stack developer for Identity Platforms at Yahoo, where I work in domains of user security and privacy. My areas of expertise include full stack development using technologies such as Java, Python, JavaScript, Hive, Spark with knowledge about Big Data Systems. My work experience at Philips Healthcare for 2 years helped me understand various software engineering principles. I was part of the HealthSuite Digital Platforms team (https://www.hsdp.io/), and I can certainly say that being part of a team which tended to the platform requirements of various imaging modalities in the market (MRI, CT, US, DXR) has been challenging and very enlightening. The experience has strengthened my development skills in C# and .NET with SQL and SQLite databases. I'd also worked on PoCs which demanded some experience in C++ and socket programming for remote desktop viewing applications. I've also worked as Systems Engineering co-op designing and implementing system engineering software solutions to be carried out in a distributed patient monitoring system for hospitals. Languages : Java, C++, Python, C#, Scheme, OCaml Web Development: Javascript, HTML5 (MTA Certified), CSS, PHP, Bootstrap, React, Express, Node.js, Spring Boot Database : SQL Server, MySQL, SQLite, MongoDB, JPA, PostgreSQL Software : Visual Studio, Android Studio, Adobe Photoshop CS6 Systems : Windows 7/8/8.1/10, MacOS and Ubuntu Others Tools: Git, TortoiseSVN, Tensorflow, Keras, Python, PyCharm ## Work Experience ### Software Engineer II @ Yahoo Jan 2022 – Present - Designed and implemented secure user registration/login flows for Identity platforms using Java and FIDO standards, driving a measurable increase in Daily Active Users, and boosting overall user registrations and sign-ins. - Contributed heavily to modernization effort, as well as re-architecture of monolithic Identity stack to move towards microservices using SDLC concepts, design principles, and laid out plans for on-prem to GCP migration. - Implemented abuse prevention strategies such as browser fingerprint and passkeys. - Actively engaged in the W3C FIDO Alliance community, collaborating on standards development and bringing industry best practices back into the organization. - Mentored engineers and built structured onboarding pathways for new developers joining the Identity organization, accelerating ramp-up and strengthening team expertise. ### Software Engineer @ Yahoo Jan 2021 – Jan 2022 | San Jose, California, United States - Designed and implemented security/privacy backend features, such as incorporating Apple App Tracking Transparency (ATT), and migration of Java stack from using ReCaptcha Free to ReCaptcha Enterprise for Yahoo/AOL properties. - Improved developer productivity by 67% (~22 dev hours per week) by stabilizing build deployments, and fixing existing CI/CD pipeline infrastructure for non deterministic behavior. Implemented REST APIs for Identity Platforms which involves working IAM, authorization, and security backend services based on protocols RFCs such as OAuth 2.0, OpenID Connect using Java, JMockit, and Cucumber. - Designed and implemented backend APIs for biometric/FIDO registration for Yahoo user account registration ### Graduate Teaching Assistant @ Khoury College of Computer Sciences Jan 2020 – Jan 2020 | Boston, Massachusetts, United States CS3000 : Algorithms Instructor : Timothy LaRock CS5700 : Computer Networks Instructor : Prasad Saripalli ### Graduate Teaching Assistant @ Khoury College of Computer Sciences Jan 2020 – Jan 2020 | Boston, Massachusetts CS3700 : Networks and Distributed Systems Instructor : Prof. Alden Jackson ### Systems Engineering Co-op @ Philips Jan 2019 – Jan 2019 | Andover, Massachusetts • Formulated and implemented solutions to run on hosts to automate registration of hosts to server as trusted clients and retrieving CA certificates, saving time for other system engineering tasks in the DevOps pipeline. • Implemented C# solutions for efficient distributed patient monitoring system host performance testing, making it easier to narrow down root cause quickly for performance dips for specific build deployment. ### Graduate Teaching Assistant @ Khoury College of Computer Sciences Jan 2019 – Jan 2019 | Boston, Massachusetts Teaching Assistant for CS3700: Networks and Distributed Systems. * Held office hours for students to clear conceptual doubts for topics that included LAN, routing, congestion control, DNS, network security, distributed key-value stores, P2P, CDNs and other topics that focus on key principals of distributed systems. * Assisted students with programming and implementing the above concepts in assignments and projects. * Responsibilities also included grading assignments, exams, weekly meetings with the professor and teaching assistants. ### Software Engineer @ Philips Jan 2016 – Jan 2018 | Bengaluru, Karnataka, India • Worked in the HealthSuite Digital Platform team on the databases and connectivity subsystems in the platform and supported development of medical workspace application. • Implemented proof of concepts involving RDP protocols for remote viewing of PACS applications with active communication across Computed Tomography team reaching target a quarter early. • Followed ATDD using NUnit test framework and in accordance with DICOM standards. Supported with maximizing code coverage and worked on features involving localization support. • Contributed to proof of concepts for migration of platform subsystem modules to HSDP cloud using cloud foundry. Languages : C#, .NET, C++, Python Databases : MySQL, SQL Tools : TortoiseSVN, IBM Clearcase, IBM Clearquest, Visual Studio, Photoshop, NUnit, Postman ### Software Intern @ ALHASAWI GROUP Jan 2015 – Jan 2015 | Kuwait • Optimized code for retrieval of monthly shipment data and implemented scripts to automate consolidation of information using a scheduler. • Re-implemented retrieval code and modified queries improving performance of data retrieval by 70% for client data fetches using SQL, TOAD and C#. • Implemented an improved user interface using WPF, C# and HTML5 for section of Human Resource Management System. ## Education ### Master of Science in Computer Science Northeastern University ### Bachelor of Technology (B.Tech.) in Computer Science National Institute of Technology Calicut ## Contact & Social - LinkedIn: https://linkedin.com/in/ronnjacob - Portfolio: https://ronnjacob.github.io/ --- Source: https://flows.cv/ronn JSON Resume: https://flows.cv/ronn/resume.json Last updated: 2026-03-29