Backend Engineer

Sumalatha
Gaddipati Building scalable, real-world systems

I design and ship production-grade backends — from low-latency AI verification pipelines to fraud detection systems. Every system I build is meant to be used, measured, and improved.

40%
Latency reduced
₹2.5L
Funded project
94%
ML accuracy
9.48
GPA / 10
Spring Boot · Flask · NLP Pipelines · JWT Auth · MySQL · REST APIs · System Design · Microservices · Spring Boot · Flask · NLP Pipelines · JWT Auth · MySQL · REST APIs · System Design · Microservices ·

Projects built
for the real world.

Not prototypes. Systems that solve concrete problems, with architecture decisions to back them up.

01 AI Systems

HalluciGuard Pro

Microservice-based verification system for AI-generated content — built to catch what LLMs get wrong.

The Problem

AI systems hallucinate. Existing solutions check outputs superficially. This needed a multi-stage pipeline that actually retrieves evidence and compares it semantically before scoring.

The Approach

Designed a retrieval → semantic comparison → scoring pipeline across isolated Docker containers. Each stage is stateless, independently scalable, and communicates through clean interfaces. Redis eliminates redundant computations on repeated queries.

35% latency reduction Dockerized architecture Modular & scalable
Verification Pipeline
Evidence Retrieval
Multi-source search — web, knowledge base, embeddings index
Semantic Comparison
Vector similarity against retrieved evidence chunks
Confidence Scoring
Weighted factual consistency score + uncertainty flag
02 NLP · Security

JobShield AI

Real-time fraud detection system for fake job postings — from 120ms to 70ms, with a feedback loop that keeps learning.

The Problem

Fake job listings cause real harm. Platforms needed a backend that could flag fraud in milliseconds, not after review queues.

The Approach

Built async preprocessing pipelines to decouple NLP inference from request handling. JWT-secured endpoints with role-based access. A MySQL-backed feedback loop lets flagged posts feed back into model retraining — the system gets sharper over time.

120ms → 70ms 40% faster responses Self-improving loop
System Architecture
POST /api/listings
JWT Auth + RBAC
Async Queue
→
NLP Inference
Flag / Pass
→
MySQL
Feedback Pipeline
→
Model Retrain
70ms
Avg response
94%
Classification
async
Processing
03 Product · Human-centered

StageFear

A communication confidence app built around a core truth — you can't improve what you can't measure.

The Problem

Most people avoid public speaking because they never get structured, private feedback. Coaching is expensive. StageFear makes the loop accessible.

The Approach

Designed around a tight record → analyze → track loop. Users record themselves, receive structured feedback, and track improvement over sessions. The backend stores progress timelines, not just snapshots — because growth takes time to see.

Feedback loop system Progress tracking Real user problem
User Improvement Loop
01
Record
User records a speaking session — no pressure, no live audience
02
Analyze
Structured feedback on pace, clarity, filler words — stored per session
03
Track
Progress timeline shows change over sessions — not just one attempt
↩ Loop repeats — improvement compounds over time
04 Spring Boot · Civic Tech

CareConnect

Volunteer-senior assistance platform — with trust built into the architecture, not just the design.

The Problem

Connecting senior citizens to volunteers sounds simple. But without identity verification and role control, the system becomes unsafe. Trust is a backend problem.

The Approach

Built 4-role RBAC with Spring Security + JWT: Senior, Volunteer, Admin, Verifier. Admins manually approve volunteers after ID verification. REST APIs handle scheduling, real-time status updates, and service coordination — with clean separation per role.

4 role access system Admin-gated onboarding Civic impact
Role Architecture
SR
Senior
Requests assistance, views scheduled services
VL
Volunteer
Applies, gets verified, accepts service requests
AD
Admin
Reviews ID verification, approves volunteers
SY
System
JWT tokens, session management, audit logs
Volunteer activation requires admin approval — no self-serve access to vulnerable users
01 Built and deployed production-grade systems solving real user problems Deployed
02 Reduced API response time by 40% — 120ms down to 70ms through async design Performance
03 Led a ₹2.5L funded real-time alert system — <3 second delivery at scale Funded
04 Achieved 94% accuracy in NLP fraud detection during Infosys internship ML Result

Python Developer Intern

Infosys Springboard — Oct 2025 — Mar 2026

Built an end-to-end NLP-based fraud detection system, covering data preprocessing, model evaluation, and backend integration for real-time use.

  • Achieved 94% classification accuracy through optimized feature engineering
  • Integrated ML inference into backend services for real-time fraud detection
  • Designed a production-ready pipeline focused on performance, scalability, and low-latency response
Backend & Systems
Spring Boot Flask REST APIs JWT / RBAC
Data & AI
MySQL NLP Pipelines
Languages
Java Python
Sumalatha
Gaddipati
B.Tech ECE · Anurag University, Hyderabad
Python Developer Intern, Infosys Springboard
Location Hyderabad, India
GPA 9.48 / 10
Internship Infosys Springboard
Published JETIR, 2024
Contact sumagaddipati@gmail.com

"I focus on building systems that are efficient, scalable, and actually used."

I think about backend systems the way an engineer should — in terms of constraints, tradeoffs, and real impact. Not lines of code, but what breaks under load, what costs you latency, and what makes a system trustworthy enough to depend on.

My work spans NLP-powered fraud detection, AI content verification, and volunteer coordination platforms. Each one taught me something different about designing for the edges — not just the happy path.

Major Achievement
Lead Developer on a ₹2.5L funded real-time alert system. Built low-latency backend with Firebase + Twilio achieving <3 second delivery under concurrent load. Published author, JETIR 2024.