Vinay Manne - Software Developer

Overview

Backend developer focused on server-side Java and lightweight Node/Express services at a Middle level, with the strongest practical experience in building servlet-based e-commerce flows. The strongest proven skill is server-side Java with JDBC-backed CRUD and servlet controllers as implemented in onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java and the servlets (ViewBookServlet, CartServlet, ProcessPaymentServlet). There is little to no evidence of testing, CI/CD, secure secrets handling, connection pooling, caching or production-grade resilience patterns in public code.

Phone

Timeline

Software Engineer · Middle

Quanteon Solutions · Full-Time

Oct 2024 to Present 2 Years 1 Month Hyderabad In office

Developed end-to-end AI platform operations features across React, Express, and PostgreSQL, including monitoring views, timelines, playback, and runtime configuration. Improved Voice AI scheduling reliability with Python and LiveKit Agents by addressing transcript persistence and event handling, and by implementing slot logic across time zones and overlaps. Built automated Voice AI testing with scenario simulation and LLM-as-judge evaluation, and created Langfuse/OpenTelemetry tooling for release and pipeline performance validation. Implemented secure data handling with AES-GCM encryption and built healthcare AI SaaS subscription and billing flows with Stripe.

React.js

Express

PostgreSQL

Python

LiveKit

Langfuse

OpenTelemetry

AI Agents

LLM

Nest.JS

Sequelize

Stripe

Jawaharlal Nehru Technological University Kakinada

Bachelor's Degree · Electronics and Communication Engineering

2020–2024 Kakinada, Andhra Pradesh

Software Engineer Intern · Junior

Quanteon Solutions · Internship

Jul 2024 to Oct 2024 3 Months Hyderabad In office

Built a full-stack e-commerce application based on Figma, delivering the React frontend, backend APIs, and the database schema. Implemented server-side services using Node.js, NestJS, Express.js, and FastAPI with REST API patterns, and used Sequelize with PostgreSQL/MySQL for persistence. Integrated Stripe for payments and related functionality as part of the application workflow.

React.js

Redux Toolkit

Material UI

Tailwind CSS

Node JS

Nest.JS

Express

FastAPI

PostgreSQL

Sequelize

Stripe

TypeScript

JavaScript

SQL

Rest API

Projects

GenAI Knowledge & Action Assistant

Sep 2026 to Present

Building a document-grounded assistant that ingests files, creates embeddings, stores them in PostgreSQL with pgvector, and retrieves relevant context for grounded answers. Implemented the agent workflow using LangChain/LangGraph with streaming responses, tool routing, and Langfuse observability, along with tests for retrieval quality and tool-selection/failure handling.

AI PR Reviewer

Aug 2026 to Present

Built a Python-based internal PR review tool for Bitbucket that takes a PR URL, fetches diffs and repository context, and performs automated analysis across bugs, security, performance, and architecture/code quality. Published review results as inline and overall comments through an internal UI interface.

Technical skills

Languages

6

Java

Python

Node JS

SQL

JavaScript

TypeScript

Node JS

4

Express

Nest.JS

Sequelize

Axios

AI/ML

6

LLM

Langfuse

AI Agents

LiveKit

LangChain

LangGraph

Frontend

5

React.js

Tailwind CSS

Material UI

Redux Toolkit

Redux

Databases

3

PostgreSQL

MySQL

pgvector

Other

14

OpenTelemetry

FastAPI

Rest API

GitHub

Figma

Docker

Git

Linux

Bitbucket

PostCSS

Docker Compose

Deepgram

Prompt Engineering

Function Calling

Middle Backend Developer Confidence: Medium API Engineer

Backend developer focused on server-side Java and lightweight Node/Express services at a Middle level, with the strongest practical experience in building servlet-based e-commerce flows. The strongest proven skill is server-side Java with JDBC-backed CRUD and servlet controllers as implemented in onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java and the servlets (ViewBookServlet, CartServlet, ProcessPaymentServlet). There is little to no evidence of testing, CI/CD, secure secrets handling, connection pooling, caching or production-grade resilience patterns in public code.

API Design

2/10

How well APIs are designed

Minimal API design: basic endpoints exist but there is no versioning, no idempotency strategy, inconsistent error contracts and no pagination or filtering conventions.

Evidence

Customer_Deatils_webportal/Backend/server.js: GET /customers returns DB result or raw error

onlinebookstore/src/main/java/servlets/ViewBookServlet.java: form-based servlet endpoints with no API versioning or consistent error responses

Data Layer & Database

3/10

Working with databases

Basic data-layer competency: direct JDBC and pg Client usage with prepared statements for CRUD, but weak error handling, connection-per-operation patterns and unsafe string-built queries.

Evidence

onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java: PreparedStatement usage for CRUD and getBooksByCommaSeperatedBookIds that concatenates values into an IN clause

onlinebookstore/src/main/java/com/bittercode/util/DBUtil.java: central DB connection helper (connection-per-operation pattern)

Customer_Deatils_webportal/Backend/database.js: simple pg Client query and immediate client.end()

Scalability & Performance

1/10

Handling load and speed

No evident scalability or performance work: no caching strategy, no connection pooling, no queueing or measured optimizations.

Evidence

Customer_Deatils_webportal/Backend/server.js: single pg Client used with no pooling or connection management

onlinebookstore/src/main/java/com/bittercode/util/DBUtil.java: appears to open connections per operation without pooling

System Architecture

3/10

Overall system structure

Monolithic but reasonably layered Java structure (model, service, servlets) indicating basic modular boundaries; lacks service decomposition, config/secret management or environment-aware deployment patterns.

Evidence

onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java: service layer implementation separate from servlets

onlinebookstore/src/main/java/servlets/ViewBookServlet.java: servlet layer handling presentation and control

Security & Auth

2/10

Protecting data and access

Some authentication checks via session/role are present but overall security hygiene is weak (hardcoded credentials, SQL injection risk, minimal input validation and secrets exposure).

Evidence

onlinebookstore/src/main/java/servlets/UpdateBookServlet.java: uses StoreUtil.isLoggedIn(UserRole.SELLER, req.getSession())

onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java: getBooksByCommaSeperatedBookIds builds SQL IN clause by string concatenation

Customer_Deatils_webportal/Backend/server.js: contains hardcoded DB password 'Vinay@123'

Reliability & Observability

1/10

Stability and monitoring

Minimal reliability and observability: console.log/printStackTrace used, no structured logging, no retries/backoff, no timeouts or graceful shutdown handling.

Evidence

onlinebookstore/src/main/java/com/bittercode/service/impl/BookServiceImpl.java: catch blocks that call e.printStackTrace() or are empty

Customer_Deatils_webportal/Backend/database.js: console.log of rows and immediate client.end()

Expertise

Java· Middle

Databases & Vector Storage· Middle

Microservices & API Architecture· Middle

Industries

Commerce· Middle

Technologies

Java· since 2024 · Middle

Node JS· since 2024 · Middle

Rest API· since 2024

Express· since 2024

FastAPI· since 2024

Axios

Recommendations

Develop small-to-medium e-commerce or CRUD web applications using servlet/JDBC or Express, focusing on end-to-end request flows and session logic.
Harden data access and security by adding connection pooling, parameterized queries (avoid string-built IN clauses), input validation and secrets via environment/config management.
Add automated tests and basic observability (structured logging, metrics) and implement graceful shutdown and simple retry/timeouts for DB operations.

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

Customer_Deatils_webportal onlinebookstore Maven-sample-project

Job preferences

Work permits: India
Citizenship: India
Employment type: Full-Time
Locations: Hyderabad, Bengaluru, Chennai