# Udit Valecha > Engineer at Twilio | CMU | NIT Surat Location: San Francisco Bay Area, United States Profile: https://flows.cv/uditvalecha Skills: Languages : Java(Advanced) , C++(Intermediate),Python(Intermediate), Terraform(Intermediate) BigData Technologies: Spark (Beginner),Hadoop(Beginner),Kafka(Beginner),Samza(Beginner) WebServices/Tools: AWS (Aurora, EC2, Glue, MSK/Kafka),, RESTful Web Services, SOAP, Git, Jira, Eclipse, HP ALM, Buildkite DataBases:Oracle11g,MySQL(Intermediate),Hbase(Beginner),MongoDB(Beginner),Cassandra(Beginner) Domain: PSTN Routing,Rate Limiting, Load Shedding, Distributed Systems, e-commerce returns ## Work Experience ### Staff Software Engineer @ Twilio Jan 2026 – Present ### Senior Software Engineer @ Twilio Jan 2022 – Jan 2026 | San Francisco Bay Area Team Overview: Lead routing and security for outbound PSTN voice calls, optimizing carrier selection for call completion while enforcing global regulatory compliance and fraud prevention. Core Impact & Achievements: Systems Resilience & High Availability Architected an End-to-End Resiliency Strategy; authored the company-wide "Resilience by Design" playbook for load shedding and backpressure. Implemented adaptive load-shedding (AIMD algorithm) across core voice services, successfully stabilizing the platform during Sev0 traffic surges. Designed a Quality of Service (QoS) system to prioritize retail traffic over wholesale during peak events, ensuring critical SLAs remain intact. Developed a "Degraded Mode" fail-open architecture for attestation services, ensuring 99.99%+ availability during downstream outages. Platform Modernization & Cloud Infrastructure Led the zero-downtime migration of configuration databases from self-managed MySQL to AWS Aurora for 8 distinct service roles. Spearheaded the containerization of the Neustar stack, migrating legacy services to Amazon Linux 2023 and modernizing task scheduling. Upgraded core services to Java 21 and modernized CI/CD pipelines to Buildkite with specialized Maven plugins. Global Compliance & Security Engineered a Transit Caller ID Restriction framework to meet international regulations (ACMA, ANATEL), protecting $80M+ in global revenue. Developed a High-Capacity Failover system that automatically quarantines unhealthy carrier endpoints, reducing manual intervention. Integrated STIR/SHAKEN attestation filtering for Tier-1 US peering trunks (Verizon/AT&T). Operational Excellence Transformed the Do Not Originate (DNO) platform into a self-service UI for Compliance Ops, eliminating weekly engineering toil. Achieved the first production integration of Amazon MSK (Kafka) for Proxy Core (US-East), enabling real-time analytics for outbound routing. ### Senior Software Engineer/ Tech Lead @ Walmart Global Tech Jan 2019 – Jan 2022 | Sunnyvale, California Led software development team for Walmart Returns System handling millions of item returns daily from 10,500 stores and walmart.com Designed and developed highly scalable and highly available REST-based web services for Walmart Returns System Created technical solutions for returns as a service that enabled marketplace sellers to independently handle returns resulting in an increase in revenue by $2M yearly Implemented extended return windows for Marketplace items during holidays which improved seller NPS Identified gaps in fraud detection and implemented preventive technical solutions resulting in $5M yearly savings Drove technical discovery workshops for new initiatives partnering with product, program, business, and UX teams. Translated requirements into optimized technical solutions based on return on investment and value add to the business. Mentored 4 engineers by authoring design documents, providing technical direction, brainstorming on complex technical issues, and estimating timelines ### Software Engineer @ Apple Jan 2016 – Jan 2019 | San Francisco Bay Area Designed and developed highly scalable REST-based web services for iCloud services Conducted A/B experiments with iCloud ML team on user notification and handled server-side changes for testing Designed and developed a solution for sharing an iCloud Storage plan with an iCloud user’s family Designed and developed APIs to be called from the iCloud side for the HomeKit Secure Video feature Built an A/B experiment framework to capture behavioral responses to notifications sent to users from iCloud Used H2 database to mock the database layer for testing the oracle implementations in the codebase Debug and fix issues that occur in production environments Implement UI changes for the iCloud Storage page on macOS and iOS using HTML and CSS ### Computing Facilities Student Operator for School of Computer Science(SCS) @ Carnegie Mellon University Jan 2016 – Jan 2016 • Managed the central computer facilities that consists of various operating systems on the entire campus network, the central host computers, and the public computing facilities at the SCS • Maintained and provided technical support for the printing infrastructure available on the SCS campus ### Graduate Teaching Assistant - Java @ Carnegie Mellon University Jan 2015 – Jan 2015 • Reinforcing concepts and guiding students in various homework assignments and projects • Compiling and grading assignments, projects and exams for the course. ### Senior Software Engineer @ Amdocs Jan 2012 – Jan 2015 | Pune Area, India Led a team of 4 developers for 5 end-to-end releases of a JAVA-based telecom-billing product hosted on Linux Implemented a bash script to report system processes of billing products, which reduced monitoring time by 50% Led cross-functional implementation team to resolve implementation issues and deliver zero defect products Formulated, analyzed and refined requirements partnering with business analysts and clients based in the US Performed unit testing on the developed module and conduct code reviews for team members Created a training module emphasizing standard coding practices for new team members Created a python script to reduce the code deployment time on the testing environment by almost 60% Handled 20 feature requests for legacy systems based on C++ and Java. Performed system testing on code ## Education ### Master’s Degree in Management Information Systems, General Carnegie Mellon University - Heinz College of Information Systems and Public Policy ### Bachelor of Technology (B.Tech.) in Computer Science National Institute of Technology Surat ### HSC in Science Navrachana Higher Secondary School ## Contact & Social - LinkedIn: https://linkedin.com/in/uditvalecha --- Source: https://flows.cv/uditvalecha JSON Resume: https://flows.cv/uditvalecha/resume.json Last updated: 2026-04-12