Ajay Singh

Java Backend Developer | Microservices | Blockchain | Cloud

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About Me

IT Analyst at NPCI specializing in scalable microservices, RESTful APIs, distributed systems, and blockchain technology. Strong in Java, Spring Boot, Kafka, Redis, Docker, and AWS cloud services. Competitive programmer with 2000+ solved problems.

Skills

Java Spring Boot Kafka Redis Docker AWS Microservices REST APIs MariaDB PostgreSQL MongoDB JUnit Mockito RBAC Distributed Systems GitHub Actions Linux

Projects

Real-Time Chat Messaging Backend: Java and Spring Boot based scalable chat backend with JWT security, WebSocket, Redis Pub/Sub, and Docker.
IoT Telemetry Ingestion Service: IoT data ingestion with Kafka streaming, PostgreSQL, Redis cache, running on AWS infrastructure.
GSEC Auction Microservices: Secure microservice platform for auction management with RBAC, Kafka event handling and MariaDB.

Achievements & Education

• Solved 2000+ coding problems on LeetCode & CodeChef
• LeetCode Max Rating: 1844 (Top 6%), CodeChef Max Rating: 1802 (Global Rank 43)
• Dakshana Scholar & Hacktoberfest 2022 Participant
• B.Tech IT, National Institute of Technology Karnataka (CGPA 7.01/10)
• Class XII Topper: Jawahar Navodaya Vidyalaya Bharatpur (94.6%)
• Class X: CGPA 9.6/10