- Work on backend modules for the Indian Government Income Tax Portal involving ITR verification, refund-related communication, and downstream data exchange.
- Build automation utilities for SQL-heavy reconciliation workflows, JSON payload generation, and interface-triggered feed processing.
- Investigate production issues across database records, API payloads, interface behavior, and backend application flow.
- Configure communication-service templates using DB-backed FreeMarker HTML templates and dynamic JSON payload mapping.
Java Backend Developer
Hi, I'm Vasanth.
I’m a backend developer working with Java, Spring Boot, SQL, and Python.
Experience
Professional experience
Job history and day-to-day backend responsibilities.
- Maintained backend stability for critical income-tax portal modules during high-volume filing periods.
- Performed root cause analysis for transaction failures and backend data issues across Java service logic, database records, and external interface payloads.
- Supported REST API testing, payload validation, database verification, and production issue resolution using Postman, SQL, logs, and internal debugging workflows.
Impact
Work highlights
Two backend problems from enterprise work, summarized without exposing internal client details.
Automation
Internal Utility
ITR Verification Feed Reconciliation
Built a utility to identify verified ITR submissions whose downstream verification feeds were missed, generate JSON payloads from Oracle records, and trigger feed submission through an existing interface.
- Impact: processed 4,000-5,000 records in under 5 minutes.
- Stack: Python, Oracle SQL, FastAPI, Postman flow replacement.
Microservice
Templates
Taxpayer Communication Templates
Onboarded taxpayer notification templates in an existing communication microservice using DB-backed FreeMarker HTML templates, JSON payload mapping, and Zebra email service integration.
- Impact: configured 22 Notification templates.
- Stack: FreeMarker, JSON payload mapping, database configuration.
Project
Personal backend project
Scalable URL Shortener Service
RESTful URL shortener backend built with Java 17 and Spring Boot 3. The service uses Base62 alias generation, Redis caching, URL analytics, DTO validation, centralized exception handling, and Dockerized setup.
Java 17
Spring Boot 3
Redis
Docker
MySQL
View GitHub
Skills
Technical skills
Languages
Java 8/17, SQL, PL/SQL, Python
Backend
Spring Boot, Spring MVC, REST APIs, Microservices, Hibernate, Spring Data JPA
Databases
Oracle Database, MySQL, PostgreSQL, Redis
Tools
Git, Postman, Maven, IntelliJ IDEA, Docker, Linux, Cron Jobs
Concepts
Backend Automation, Data Reconciliation, API Integration, SQL Optimization, RCA, JSON Payload Processing
Contact
Open to Java backend roles.
Interested in Java Backend Developer, Spring Boot Developer, Backend Engineer, and Software Engineer - Java opportunities.