Sachin Kumar
Full Stack Developer – Java, Spring Boot, React | DevOps Enthusiast
Summary
Full Stack Developer with 3+ years of professional experience building scalable enterprise applications using Java, Spring Boot, and React. Proven expertise in microservices architecture, RESTful API design, and database optimization. Strong DevOps foundation with hands-on experience in Docker, CI/CD pipelines, and cloud deployment. Track record of reducing system latency by 40% and leading development teams to deliver high-performance solutions.
Professional Experience
Backend Engineer – Trading Automation
Sprout Investments • Jan 2023 - Mar 2025 • Chandigarh, India
- Reduced trade execution latency by 30-40% through optimized automated order placement systems
- Designed and deployed microservices handling 75% increased trading volume with real-time processing
- Improved database performance by 40% through PostgreSQL query optimization and schema redesign
- Established CI/CD pipelines reducing deployment time and ensuring zero-downtime releases
- Mentored team of 3 junior developers, improving code quality and reducing bug resolution time by 35%
Full Stack Developer
Audio Intakes • Sep 2021 - Dec 2022 • Remote (Netherlands)
- Developed React.js audio interview platform with WebRTC, serving 1000+ active recruiters
- Built secure RESTful APIs using NestJS and PostgreSQL with JWT authentication and RBAC
- Optimized application performance reducing memory usage by 25% and improving load times
- Implemented comprehensive testing suite (unit & E2E) achieving 85% code coverage
Freelance Full Stack Developer
Self-Employed • Feb 2021 - Jun 2021
- Delivered 10+ web development and automation projects for international clients
- Managed complete project lifecycle from requirements gathering to deployment
- Maintained 100% client satisfaction through effective communication and timely delivery
Software Development Intern
SpeEdLabs • Jul 2021 - Aug 2021 • Indore, India
- Optimized MERN stack e-commerce and learning management applications
- Integrated multiple product platforms into unified authentication system
- Improved codebase efficiency and reduced technical debt
Education
PG-DAC (Post Graduate Diploma in Advanced Computing)
CDAC • Aug 2025 • 72.5% (232/320)
Core Modules:
- Object Oriented Programming with Java • Web-based Java Programming
- Algorithms and Data Structures • Database Technologies
- Web Programming Technologies • Microsoft .NET Technologies
- C++ Programming • OS & Software Development Methodologies
Bachelor of Engineering - Computer Science
Chitkara University • 2019-2023 • 96.8%
Technical Skills
Backend Development
Java, Spring Boot, Spring MVC, Hibernate, JPA, REST APIs, Microservices, Node.js, Express.js
Frontend Development
React.js, JavaScript, TypeScript, HTML5, CSS3, Material-UI, Bootstrap, Redux
DevOps & CI/CD
Docker, Docker Compose, Jenkins, GitHub Actions, GitLab CI, Maven, Gradle, Linux Administration
Cloud & Infrastructure
AWS (EC2, S3, RDS), Nginx, Apache Tomcat, PM2, Server Management, Deployment Automation
Databases
PostgreSQL, MySQL, MongoDB, Redis, Database Optimization, Query Tuning
Tools & Practices
Git, Postman, Swagger, JUnit, Jest, Agile/Scrum, TDD, Code Review
Key Projects
Matrimony Portal - Full Stack Application
React, Spring Boot, MySQL, Docker • Jan 2026
Enterprise matrimonial platform with Spring Boot microservices backend and React SPA frontend. Features include advanced search algorithms, real-time messaging, profile management, and scalable architecture supporting 50K+ concurrent users. Containerized deployment with Docker Compose.
SecurePaste - Text Hosting Service
NestJS, PostgreSQL, Docker • May 2025
Production-ready secure text hosting service with end-to-end encryption, comprehensive logging, and security middleware. Deployed using Docker with automated CI/CD achieving 99.9% uptime and handling 10K+ daily requests.
Online Assessment Portal - MERN Stack
React, Node.js, Express, MongoDB • Dec 2020 - Apr 2021
Production-grade assessment platform supporting MCQs, multi-language coding challenges (Java, Python, C++), and web framework evaluations. Features include secure proctoring, automated code evaluation, real-time analytics, and admin dashboard. Successfully used for 500+ technical assessments.
-- LOGIN DETAILS --
email: sachin.kr.work@gmail.com
password: Sachin@123
-- PassCodes --
EHFH557177
BCHK718831
ADFJ741738
Coding Community Platform
LAMP Stack (PHP, MySQL, Apache) • Mar 2020 - Jun 2020
Community-driven platform for developers to discuss code, share solutions, and collaborate on bug fixes. Implemented user authentication, forum system, and code syntax highlighting.
Rank-based Voting System
Java • Nov 2017 - Dec 2017
Console-based voting platform with rank-based scoring system. Voters cast 3 votes with weighted scores (+3, +2, +1), preventing vote repetition and including NOTA option.
Certifications & Training
- CO-OP Project at Industry - React and Spring Boot Developer
- Participated in multiple hackathons and coding competitions
- Conducted coding contests and technical workshops
- Member of Tech Team – Sports Club (CU-Arcs)