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Available for opportunities · Hyderabad, India

Gurrapu
Vigneshwar

Backend Engineer at Cognizant · ML Systems Builder

I architect production-grade backend systems in Java & Spring Boot, and train deep learning models that ship to real users. Currently building scalable enterprise systems at Cognizant while pushing ML models into production on Hugging Face.

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1+
Year at Cognizant
4
Live Projects
93.55%
ML Model Accuracy
99.56%
Fraud Detection Acc.
scroll
Java
Spring Boot
REST APIs
TensorFlow
EfficientNetB3
MySQL
Docker
Grad-CAM
Microservices
JPA/Hibernate
Scikit-learn
Spring Security
Agile
Qlik Sense
Java
Spring Boot
REST APIs
TensorFlow
EfficientNetB3
MySQL
Docker
Grad-CAM
Microservices
JPA/Hibernate
Scikit-learn
Spring Security
Agile
Qlik Sense

Production-grade
systems & models

Every project ships to real users. No demos, no toy implementations — real engineering with measurable outcomes.

All repos on GitHub
Fraud Detection Engine
284,807 Transactions · ML Benchmarked
KNN
99.56%
Rand Forest
99.2%
Logistic Reg
97.4%
Winner → KNN Accuracy
99.56%
Python Scikit-learn GridSearchCV KFold CV

Credit Card Fraud Detection

Benchmarked KNN, Random Forest, Logistic Regression & Decision Tree on 284,807 real transactions. KNN achieved 99.56% accuracy and 92.10% fraud sensitivity, selected via sensitivity-focused model evaluation to minimize missed fraud.

Road Safety Analytics · India 2019
37
States
9
Datasets
Fatal
Injured
Hotspots
Qlik Sense Data Analysis KPI Dashboards

Road Safety Analytics — India

Integrated 9 government road-safety datasets spanning 37 states; built a 4-sheet Qlik Sense dashboard (Overview, Demographics, Safety Deep-Dive, Insights) enabling drill-down accident hotspot analysis for data-driven decisions.

Where I've built
real systems

Jul 2025 — Present Chennai, India
Programmer Analyst Trainee— Backend Engineer
Cognizant

Own and engineer production backend services across the full Java/Spring Boot stack. Operate in live Agile sprints, diagnosing production incidents, optimizing JPA queries, and shipping clean, maintainable code across Controller → Service → Repository layers.

Engineer production-grade Spring Boot services with full MVC architecture and clean layer separation
Root-cause production issues across JPA queries, REST endpoints, and data layer in sprint cycles
Participate in sprint planning, standups, and peer code reviews in fast-moving Agile teams
Tech: Java · Spring Boot · Spring MVC · JPA/Hibernate · MySQL · Git · JUnit · Mockito · Postman
Jan 2025 — Jul 2025 Pune, India
Software Intern — Java & Spring Boot
Cognizant

Sole owner of the Payment Management Module for a live enterprise Auto Insurance System. Designed payment gateway simulation, retry logic, and persistent audit trails, achieving 95%+ code coverage through rigorous TDD with JUnit & Mockito.

Sole developer of the Payment Module — gateway simulation, retry logic, and full audit trail
95%+ unit test coverage via TDD with JUnit & Mockito, reducing post-deployment defects
Enforced transactional integrity with @Transactional service layer, eliminating data inconsistency
Integrated frontend forms with backend via Spring MVC, bridging HTML/CSS to service logic
Apr 2024 — Jun 2024 Remote
Business Analyst Intern
Qlik · AICTE Virtual Program

Analyzed real government road-safety datasets across 37 Indian states using Qlik Sense. Delivered interactive KPI dashboards that surfaced actionable accident hotspots and demographic risk patterns for data-driven policy decisions.

Integrated and cleaned 9 government datasets (37 states) for unified cross-dataset analysis
Built a 4-sheet Qlik Sense dashboard with drill-down filters, KPIs, and storytelling views
Developed analytical and data visualization skills for real-world decision support
Mar 2021 — May 2025 Warangal, India
B.Tech — Information Technology
Kakatiya Institute of Technology & Science (CGPA: 8.29/10)

Graduated with strong foundations in algorithms, software engineering, databases, and ML. Completed multiple live projects including AI Image Classification and Enterprise Insurance System as final-year major projects.

Technologies I
ship with

⚙️
Backend Engineering
Java Spring Boot Spring MVC Spring Security JPA/Hibernate REST APIs Microservices BCrypt Maven Thymeleaf
🧠
Machine Learning & AI
Python TensorFlow/Keras EfficientNetB3 Grad-CAM Custom CNN Scikit-learn Pandas NumPy Flask Hugging Face
🗄️
Database & Storage
MySQL SQL PL/SQL Spring Data JPA CRUD Operations Query Optimization
🚀
DevOps & Infrastructure
Docker Git GitHub Linux CI/CD Render Cloud Postman Kaggle (GPU)
🧪
Testing & Quality
JUnit Mockito TDD Unit Testing 95%+ Coverage GridSearchCV KFold CV
📊
Analytics & Process
Qlik Sense KPI Dashboard Design Data Visualization Agile/Scrum SDLC/STLC OOP

Certified expertise
from top institutions

★ Elite Certificate
Privacy & Security in Online Social Media
NPTEL · IIIT Hyderabad · Jan–Apr 2024
75%
Consolidated Score · 11,095 candidates certified
NPTEL Certified
Deep Learning
NPTEL · IIT Madras · Jan–Apr 2024
55%
Consolidated Score · 12-week course · 1,796 certified
Virtual Internship
Business Analytics powered by Qlik
Qlik · SmartBridge · AICTE · Jul 2024
VIP-BA-2024-261
Certificate ID · 10-Week Program · Apr–Jun 2024

Grab the full
Resume / CV

Looking for a traditional format to share with your team? Download the comprehensive 1-page PDF detailing my full-stack engineering workflow, API design, and ML pipeline implementations.

8.29/10 B.Tech CGPA
Cognizant Current Role
Java/Spring Core Backend

Let's build
something
exceptional.

Open to backend engineering, ML engineering, and full-stack roles. If you're building something interesting, I'd love to talk.

Send Email LinkedIn GitHub +91 9393744833