JM

JayaShankar
Mangina

Software Engineer

Building high-impact systems at scale
FullStack Backend Agentic AI System Design Cloud Computing
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01

Amazon

Refactored API contracts with Pydantic-based validations to achieve 100% data integrity across 5,000 devices

100% Data integrity
40% Faster tracking
0.5% Error rate

2024 – Present · Austin, TX

02

Amazon Web Services

Built Scope-3 carbon emissions service with 100% integration test coverage, reducing client emissions by 60%

60% Emissions reduced
100% Test coverage
98% Fewer issues

2022 – 2024 · Seattle, WA

03

Cognizant Technology Solutions

Engineered Spring-based backend services and optimized Maven workflows, boosting performance by 40%

40% Performance gain
40% Faster builds

2019 – 2020 · Chennai, India

Projects

CERT

iOS emergency response app with Firebase integration for real-time incident coordination

→ 40% faster processing • 60% location accuracy • 50% scalability improvement

GitHub →

PicToSend

Peer-to-peer photo sharing iOS app using Multipeer Connectivity for offline transfers

→ 50% faster connection • 60% reliability • 40% higher engagement

GitHub →

PyFlink PageRank

Distributed PageRank algorithm using Apache Beam and Flink for big data processing

→ 20% ranking precision • 30% faster execution • Fault-tolerant streaming

GitHub →

WebSocketChat

Real-time chat platform with Spring Boot, WebSockets, and STOMP.js

→ 70% message reliability • 40% engagement increase • 60% security improvement

GitHub →

EchoMaster

Full-featured Android music player in Kotlin with audio visualization

→ 60% playback reliability • 50% engagement increase • 40% retention boost

GitHub →

SpamText-Classifier

Naive Bayes email filter with >95% accuracy using scikit-learn and custom ML engine

→ 95%+ accuracy • <100ms predictions • 98% MSE reduction

GitHub →

Let's build something

jyshnkr.mangina@gmail.com

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