Backend
Java · Spring Boot · REST APIs · Multithreading · Socket Programming
SOFTWARE DEVELOPMENT ENGINEER
Hi, I'm Karthik.
I build backend systems.
Computer Science Engineering graduate focused on Java, Spring Boot, REST APIs and database-driven applications — with a strong interest in scalable and reliable software.
JAVASPRING BOOTMYSQLDOCKER
Available for opportunities
backend-engineer.sh
$ whoami
karthik-naik
$ stack --primary
JavaSpring BootMySQLDocker
$ status
building & learning
FOCUSJava Backend
BASED INBangalore, India
OPEN TOSoftware Roles
01 / ABOUT
Backend-minded.
Engineering-focused.
I'm a Computer Science Engineering graduate with hands-on experience building backend applications using Java and Spring Boot.
I enjoy working on RESTful APIs, concurrent systems, databases and production-oriented software projects. My experience also includes Android development with Kotlin and Jetpack Compose.
B.E.Computer Science Engineering
May 2026Graduated
02 / SKILLS
Tools I work with.
Data
MySQL · SQL · Hibernate · Spring Data JPA · Firebase
Android
Kotlin · Jetpack Compose · MVVM · Room · Firestore
Engineering
DSA · OOP · Concurrency · System Design · Caching
Tools
HTML · CSS · Git · GitHub · Docker · Maven · Gradle · Postman · Swagger/OpenAPI · JUnit
03 / PROJECTS
Things I've built.
View all repositories ↗Selected work across backend systems, concurrency and Android.
01 / FEATUREDBackend · Production
URL Shortener Service
A production-oriented URL shortening service built with Java and Spring Boot. Generates compact Base62 URLs and exposes APIs for aliases, expiration, QR codes and click analytics.
View Source ↗Quick case study +
Built
RESTful URL shortening service with compact Base62 URL generation.
Key work
Custom aliases, URL expiration, QR code generation, click analytics and global exception handling.
Engineering
Spring Data JPA with MySQL, Swagger/OpenAPI documentation, JUnit integration testing, JaCoCo coverage and Docker containerization.
APIREST
EncodingBase62
DatabaseMySQL
DeployDocker
02Systems
02
Multithreaded HTTP Proxy Server
Java socket-based HTTP proxy using ExecutorService, LRU caching, TTL eviction and sliding-window rate limiting.
View Source ↗Quick case study +
Built
Multithreaded HTTP proxy server using Java socket programming.
Key work
ExecutorService for concurrent connections, LRU cache with TTL eviction and sliding-window rate limiting.
Result
Exposed a metrics endpoint and benchmarked the proxy at approximately 1150 requests/sec.
03Android
03
NammaKelsa
Two-sided Android marketplace connecting skilled workers and hirers, with request management, profiles, reviews, ratings and real-time chat.
View Source ↗Quick case study +
Built
Two-sided Android marketplace connecting skilled workers with hirers.
Architecture
MVVM with Repository pattern using Firebase Authentication, Cloud Firestore and Realtime Database.
Features
Worker/hirer workflows, request management, reviews, ratings, favorites, profiles and real-time chat.
04 / EXPERIENCE
FEB 2026 — MAY 2026
Android App Development Intern — Generative AI
MindMatrix · Bangalore
Built Android applications with Generative AI features and REST API integrations, improving application workflows while contributing to debugging, performance optimization, Git-based development and Agile delivery.
SEP 2024 — DEC 2024
IoT Trainee
Samsung Innovation Campus · Bangalore
Built IoT solutions for real-time monitoring by integrating sensors, microcontrollers and communication protocols, with hands-on work across device communication, data collection and system testing.
05 / EDUCATION
Cambridge Institute of Technology
B.E. in Computer Science Engineering · VTU · May 2026
CGPA: 7.21 / 10~1150proxy requests/sec
Base62compact URL generation
RESTAPI-first backend work
Javaprimary backend stack
06 / APPROACH
How I approach
building software.
I focus on clear APIs, reliable data flow, concurrency where it matters, and software that is easy to test and understand.
Understand
Break the problem into requirements, data flow and core use cases.
Design
Choose appropriate APIs, data models, architecture and performance strategies.
Build & Test
Implement cleanly, handle failures, test important paths and document the API.
07 / CERTIFICATIONS
Proof of learning.
Credentials that complement my engineering projects and hands-on experience.
NPTEL
CERTIFICATION · 2025
Data Structures and Algorithms Using Java
Focused on core data structures, algorithms and problem-solving using Java.
SIC
CERTIFICATION · 2024
Internet of Things (IoT)
Samsung Innovation Campus certification covering IoT concepts and practical development.
HAVE AN OPPORTUNITY?
Let's build something
useful together.
Currently open to software engineering opportunities