K G S Varun Teja

K G S Varun Teja

SDE 1

Hyderabad, India

kgsvt01@gmail.com


About

Java Backend Developer with around 3 years of experience building scalable, reliable and secure applications using Java, Spring Boot, REST APIs and MySQL. Proficient in system design principles including high-level architecture, API design, load balancing and database scaling techniques with the ability to translate business requirements into well-structured, maintainable backend systems. Experienced in microservices architecture, API development and database optimization. Passionate about collaborating with innovative teams to deliver high-performance backend solutions that drive business growth.

Skills
Java
SpringBoot
Spring
Microservices
SQL
MySQL
Hibernate
Kafka
System Design
AWS: EC2
RDS
S3
Maven
JUnit
Mockito
Swagger
Postman
Tomcat
JavaScript
Angular14
Vaadin 23
Product Management
CI/CD
AWS Bedrock
Experience

Software Development Engineer 1

Zensark Technologies

May 2025 to Present
  • Developed and maintained backend services in Java and Spring Boot for two client products, an ed-tech tuition platform (1,000+ students) and a B2B aviation marketplace, owning features end to end from database design to deployment.
  • Built core business modules including Stripe billing, reporting dashboards, and recurring class scheduling, integrated third-party services (Stripe, Bunny Stream, SendGrid, AWS Bedrock), and deployed the platform on AWS (EC2, RDS, S3); currently implementing AI features.
  • Improved application stability and performance by resolving 80+ production defects, eliminating N+1 queries, and migrating legacy Vaadin 7 UI to Vaadin 23, cutting manual admin effort by about 50%.

Assistant manager

JSW Steel Ltd.

Jan 2023 to Jun 2024
  • • Contributed to the SAMPARK logistics digitalization platform, participating in client discussions, UI design, development, and code reviews, helping reduce Turnaround Time (TTAT) by 40%.
  • • Developed end-to-end barcode tracking solutions enabling real-time access to coil details and movement history, improving traceability and operational visibility.
  • • Optimized SQL queries using JOIN-based retrieval techniques, reducing database response times by 30% for high-volume lookup operations.
Projects

Ed. Tech Application

This is a tuitions application where students are trained for exams like SAT, PSAT, DSAT and so on. I'm currently implementing AI features in the application. • Built the Stripe billing module for an ed-tech platform (1,000+ students) processing 500+ payments/month, covering admin cancel-and-refund, self-service card updates, PDF receipts, and webhook-driven payment states. • Developed a student-progress dashboard aggregating 26 tables into per-student test, module, and workshop reports, replacing manual per-student reporting; eliminated N+1 queries via bulk fetches and JPA projections, cutting admin work by 50%. • Designed a Microsoft Teams-style class calendar for 150+ batches, auto-generating recurring class events with edit-one/edit-all-future, cancel, and reschedule support, reducing admin scheduling effort by 50%. • Owned AWS deployment of the Spring Boot backend on EC2 with RDS (MySQL), managing dev environment configuration and releases.

Java
SpringBoot
Postman
Strpie
Bunny Stream
Send Grid
MySQL
AWS:EC2-RDS-S3-Bedrock-AppConfig
JavaScript
Angular14

B2B Aviation Marketplace Application

• Migrated 20+ legacy Vaadin 7 UI components to Vaadin 23, preserving existing business workflows. • Investigated and resolved 80+ production defects across UI, backend and file-upload workflows, improving application stability and reducing recurring support issues. • Implemented form validations and exception handling across multiple business screens, reducing user-facing errors and improving data integrity.

Java
Vaadin23
SpringBoot
Education

Bachelor of Technology

GMR Institute of Technology

Aug 2018 to Jun 2022