Nikeleswar Ranga

Backend Engineer

United States4 yrs 6 mos experience

Most Likely To SwitchAI ML Practitioner

Key Highlights

Expert in SQL optimization and backend service development.
Proficient in Snowflake and enterprise data platform debugging.
Experienced in leveraging AI-assisted development tools.

Stackforce AI infers this person is a Fintech Data Engineer with strong backend development skills.

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Skills

Core Skills

Advanced Sql & Query OptimizationJava Backend DevelopmentCross-layer Data System Troubleshooting

Other Skills

SQL optimizationbackend service developmententerprise data platform debuggingSnowflakeSAP IQAlloy Data PlatformJavaPythonREST APISQLTableauPower BIgRPCREST APIsC++

About

I am a Data Engineer and Backend Engineer at Goldman Sachs with strong hands-on expertise in SQL optimization, backend service development, and enterprise data platform debugging. I work extensively across Snowflake, SAP IQ, and Alloy Data Platform, performing deep query optimization, execution plan analysis, and cross-layer debugging from source systems to reporting dashboards. My backend experience includes Java (Spring Boot) development with Maven-based build management, REST API implementation, and Python-based data processing and automation. I also have exposure to C++ components in performance-critical modules. I leverage AI-assisted tools such as GitHub Copilot and Devain.ai to improve development efficiency, debugging workflows, and code quality. Core Focus Areas: • Advanced SQL & Query Optimization • Data Pipeline Debugging & Performance Tuning • Java Backend Development (Maven, REST APIs) • Python for Data Engineering • Cross-layer Data System Troubleshooting • Alloy Service Mapping & Exposure

Experience

4 yrs 6 mos

Total Experience

10 mos

Average Tenure

1 yr

Current Experience

Goldman sachs

Senior Data/Back-End Engineer

May 2025 – Present · 1 yr · New York City Metropolitan Area · On-site

Architecting and maintaining scalable enterprise data pipelines across the full data lifecycle — from COLT DB ingestion to Data Lake, Refiner layers, Snowflake warehousing, and BI reporting platforms
Possessing deep business and technical understanding of multi-layer data architecture including:
Source systems (COLT DB)
Data Lake ingestion
Refiner/Transformation layers
Snowflake data warehouse modeling
Reporting delivery via Tableau and Power BI
Designing and optimizing complex SQL transformations across Snowflake and SAP IQ to support large-scale financial reporting use cases
Building and debugging backend services using Java and Python to support ingestion, transformation, and governed data exposure via Alloy
Mapping and exposing internal Goldman Sachs services using Alloy Data Platform to enable structured and compliant analytics access
Driving performance optimization initiatives across database and reporting layers to improve query efficiency and dashboard responsiveness
Collaborating closely with reporting, analytics, and business stakeholders to deliver fully integrated end-to-end data solutions
Leveraging AI-assisted development tools such as GitHub Copilot and Devain.ai to enhance engineering productivity and debugging efficiency

SQL optimizationbackend service developmententerprise data platform debuggingSnowflakeSAP IQAlloy Data Platform+5

Infosys

Sr Software/Data Engineer

May 2025 – Present · 1 yr · New York City Metropolitan Area

Swift

Data/Backend Engineer

Aug 2024 – May 2025 · 9 mos · Virginia, United States · Hybrid

Developed backend services using Java (gRPC, REST APIs) to process and stream high-volume financial transaction data across distributed systems
Designed and maintained structured data contracts using Protocol Buffers (.proto) enabling efficient cross-service communication and schema enforcement
Built and optimized complex SQL queries for validating, transforming, and analyzing transactional datasets within Snowflake environments
Performed advanced SQL operations including multi-table joins, aggregations, CTEs, window functions, and data reconciliation queries
Debugged data discrepancies by tracing message flows from service layer to warehouse tables, ensuring data integrity across systems
Contributed to structured data transformation logic before loading into Snowflake for downstream analytical and reporting use cases
Implemented data validation frameworks using Python and SQL to verify schema compliance and detect inconsistencies in financial message pipelines
Developed Java-based validation and routing logic for MT/MX/MQ financial messaging flows
Improved query performance through optimization techniques such as query restructuring, filtering strategies, and indexing awareness
Integrated secure communication using SSL/TLS and authentication mechanisms for protected financial data exchange
Deployed and managed containerized backend services on OpenShift (OCP) using Docker, ensuring scalability and reliability
Collaborated with cross-functional teams to support end-to-end data processing and reporting requirements

JavagRPCREST APIsSQLSnowflakePython+2

Nextrow digital

2 roles

Software Developer

Promoted

Dec 2023 – Aug 2024 · 8 mos · Chicago, IL

Developed backend modules in C++ and Java, applying OOPS principles and multithreading to improve concurrency and application performance
Contributed to database-driven features by writing optimized SQL queries and debugging data-related issues in transactional systems
Enhanced CI/CD pipelines and automated build processes to improve deployment reliability and reduce integration issues
Refactored legacy code for better modularity, performance, and maintainability

C++JavaSQLJava Backend DevelopmentAdvanced SQL & Query Optimization

software developer

Sep 2023 – Dec 2023 · 3 mos · Chicago, IL

Worked C++ with Database is SQL to develop and deploy the existing code. with different applications which is used to enhance and migrate for code switch.

C++SQLJava

Cognizant

2 roles

Programming Analyst

Jan 2021 – Aug 2022 · 1 yr 7 mos

Developed and debugged enterprise applications using JAVA/C++, focusing on multithreaded processing and performance optimization
Analyzed and resolved production issues related to memory handling, concurrency, and system stability
Collaborated with cross-functional teams to implement feature enhancements and ensure application reliability in high-usage environments

C++SQLJava