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Prerna Jangra

Software Engineer – Backend Development @ Rosmerta Technologies Limited | Maven, Spring MVC, IntelliJ IDEA

Gurugram

6+ years of work experience

Rosmerta Technologies Limited
Feb 20242 yrs 5 mosPresent

Gurugram, Haryana, India

Architected and delivered 100+ production RESTful APIs using Spring Boot (Controller-Service-Repository) across Ticketing, AIS 140, VTS, MIS, BFSI, and Visitor Management platforms serving government and enterprise clients Led Java 11 → 17 platform migration across 10+ live production services including MIS Stock, Pravesh VMS, Ticketing, AIS 140 SS, and Audit Trail — modernizing the entire backend platform Optimized PostgreSQL query performance by 30–40% through SQL function refactoring, composite indexing, and query plan tuning — improving report speed for 50+ daily users Engineered Central SSO Login Service using Spring Security & JWT, enabling single-auth access to AIS 140 data across multiple Indian states from one unified dashboard Executed AIS 140 state migrations (RAPL → SS) across 7 states (TN, AP, J&K, HR, CH, GJ, HP) — platform now live in 19 Indian states in production Implemented JWT authentication & fine-grained RBAC via Spring Security across all multi-tenant APIs Built bulk upload pipelines for dealers, vehicles & permits using Apache POI — reducing manual data entry by 70% and enabling Excel exports for 7+ report types used by 50+ users Integrated real-time SMS (Sensorise) & Firebase push notifications improving Ticketing response rates by 30–40% across 500+ monthly tickets Collaborated across QA, iOS, Android, frontend & DBA teams in agile delivery cycles
Global Institute of Technology & Management,Gurugram (GITM)
Sep 20203 yrs 5 mosJan 2024

Gurugram, Haryana, India

Bharat Intern
Aug 20232 mosSep 2023

Remote

Code Casa
Jul 20232 mosAug 2023

work from home

Education

Bachelor of Technology - BTech, Computer science engineering

Global institute of technology and management farrukhnagar gurugran

20204 yrs2024

12, Pcm

Euro International School Rewari

20191 yr2020

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Headline

Software Engineer – Backend Development @ Rosmerta Technologies Limited | Maven, Spring MVC, IntelliJ IDEA

About

Java Backend Developer with 2+ years of experience designing and delivering production-grade REST APIs, microservices, and database-optimized backend systems across VTS, BFSI, and enterprise domains. Currently at Rosmerta Technologies, I have engineered 100+ APIs using Java and Spring Boot, led Java 11→17 platform upgrades across 10+ live production services, and architected a Central SSO Login Service deployed across 19 Indian states. I specialize in building secure, scalable backend systems with a strong focus on performance, clean architecture, and real-world impact. 🔧 Core Skills: Java 17/21 · Spring Boot · Spring Security · JWT · REST APIs · Microservices · PostgreSQL · Redis · Apache Kafka · Docker · JUnit 5 · Hibernate · Git · CI/CD 🏗️ Domains: Government Platforms · BFSI · Vehicle Tracking (AIS 140) · Enterprise SaaS 🌱 Currently upskilling in: AWS · Advanced Microservices · Cloud-native Kafka 📌 Projects: github.com/prrernaa 📩 Open to Java Backend roles (SE/SSE) at product-based companies — remote or Gurgaon/Delhi NCR

Location

Gurugram

Work experience

Software Engineer – Backend Development at Rosmerta Technologies Limited, Feb 2024 - Present · 2 yrs 5 mos, Gurugram, Haryana, India, Architected and delivered 100+ production RESTful APIs using Spring Boot (Controller-Service-Repository) across Ticketing, AIS 140, VTS, MIS, BFSI, and Visitor Management platforms serving government and enterprise clients Led Java 11 → 17 platform migration across 10+ live production services including MIS Stock, Pravesh VMS, Ticketing, AIS 140 SS, and Audit Trail — modernizing the entire backend platform Optimized PostgreSQL query performance by 30–40% through SQL function refactoring, composite indexing, and query plan tuning — improving report speed for 50+ daily users Engineered Central SSO Login Service using Spring Security & JWT, enabling single-auth access to AIS 140 data across multiple Indian states from one unified dashboard Executed AIS 140 state migrations (RAPL → SS) across 7 states (TN, AP, J&K, HR, CH, GJ, HP) — platform now live in 19 Indian states in production Implemented JWT authentication & fine-grained RBAC via Spring Security across all multi-tenant APIs Built bulk upload pipelines for dealers, vehicles & permits using Apache POI — reducing manual data entry by 70% and enabling Excel exports for 7+ report types used by 50+ users Integrated real-time SMS (Sensorise) & Firebase push notifications improving Ticketing response rates by 30–40% across 500+ monthly tickets Collaborated across QA, iOS, Android, frontend & DBA teams in agile delivery cycles

Student at Global Institute of Technology & Management,Gurugram (GITM), Sep 2020 - Jan 2024 · 3 yrs 5 mos, Gurugram, Haryana, India

Full Stack Developer at Bharat Intern, Aug 2023 - Sep 2023 · 2 mos, Remote

Web Development and Designing at Code Casa, Jul 2023 - Aug 2023 · 2 mos, work from home

Education

Bachelor of Technology - BTech, Computer science engineering, Global institute of technology and management farrukhnagar gurugran

12, Pcm, Euro International School Rewari