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sriniwas upadhyay

@sriniwasupadhyay

Message

I build high-performance C/C++ telecom systems, cloud-native test platforms, and low-latency network software.

India

Message

At R Systems, I build C/C++ 4G/5G USDP proxy and routing modules for 3GPP Nudr, PLF, BSF, and DQI applications, while owning production support for core network software. I designed low-latency subscriber and LDAP data structures using pre-pooled memory and LMDB-backed caching.

I led MPRS, a cloud-native parallel regression framework whose work-stealing, quarantine, and self-healing mechanisms reduced an 849-test suite from 210 to 36 minutes. Across IBM, CenturyLink, Aristocrat, and R Systems, I've delivered telecom billing, order-management, embedded telemetry, factory automation, and IPTV systems using C/C++, Java, Linux, Kubernetes, and distributed CI/CD.

Experience

Work history, roles, and key accomplishments

Current

Lead Engineer

Current

R Systems International

Oct 2025 - Present (11 months)

Contributed to C/C++ proxy modules for 4G/5G USDP integration supporting 3GPP Nudr interfaces and REST GZIP/Base64 processing pipelines. Designed and implemented efficient C data structures with pre-pooled memory and LMDB-backed caching for low-latency retrieval.

C C++USDP 3GPP Nudr REST Gzip Base64 LMDB Data Structures Multithreading Concurrency Memory Management Kubernetes Docker Helm Nokia Container Services CI CD Jenkins Git Linux Shell Scripting OpenSearch Cursor

Project Leader

R Systems International

Oct 2021 - Oct 2025 (4 years)

Led migration of core application modules and test frameworks from legacy VNFs to Kubernetes CNFs using Pods, Deployments, RoleBindings, and Nokia Container Services. Designed and led implementation of MPRS, a cloud-native test framework with adaptive work-stealing scheduling and asynchronous telemetry streaming.

C C++Kubernetes VNF To CNF Migration Nokia Container Services MPRS Work Stealing Scheduling Telemetry CI CD Jenkins Git Linux Shell Scripting OpenSearch Cursor

Senior Software Engineer

R Systems International

Mar 2018 - Oct 2021 (3 years 7 months)

Contributed features across PLF, including HTTP PCRF health checks, BSF, and DQI routing modules, with production on-call support for core node applications. Resolved core defect and database import bottlenecks for Panasonic PanaCIM-8 MES and contributed to ABR video packaging for Anevia/Proximus IPTV.

C C++PLF BSF DQI HTTP PCRF Production Support Root Cause Analysis PanaCIM ABR IPTV SQL Oracle Pro*C Shell Scripting

Senior Software Engineer-I

Aristocrat Technologies India

Jan 2017 - Mar 2018 (1 year 2 months)

Developed low-level embedded C/C++ software for player tracking units running on Embedded Linux and Windows, transmitting real-time telemetry to OASIS DB.

C C++Embedded Systems Embedded Linux Windows Telemetry OASIS Database

Software Developer

CenturyLink Technologies India

Sep 2015 - Jan 2017 (1 year 4 months)

Built REST/SOAP services in Java using JSE/JDBC on Apache ServiceMix to route enterprise telecom order payloads across backend endpoints.

Java JSE JDBC REST SOAP Apache ServiceMix Telecommunications Order Management

System Engineer / Application Developer

IBM India

Aug 2011 - Sep 2015 (4 years 1 month)

Maintained OLTP billing and recharge engines (SIRA, Mortirolo, VOM) on Oracle Tuxedo ATMI, serving 4.2M subscribers using C, C++, SQL, Pro*C, and Shell Scripting. Implemented Diameter protocol handlers in SIRA core and created Tuxedo processes supporting OCS charging and cancellation operations.