Chandan Kumar

DevOps Engineer

Bengaluru, Karnataka, India6 yrs 4 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Developed scalable systems handling 10,000+ requests per second.
Identified over 100 security vulnerabilities in Oracle protocols.
Expertise in Java and microservices for innovative solutions.

Stackforce AI infers this person is a Backend-heavy Fullstack Engineer in the SaaS industry.

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Skills

Core Skills

JavaMicroservicesSecurity.net

Other Skills

Distributed SystemsDatabase EngineeringSQLMultithreadingSpring FrameworkJUnitPerlCreative WritingCreative Problem SolvingC++HTMLJavaScriptCascading Style Sheets (CSS)Problem SolvingBlockchain

About

Currently serving as Senior Member of Technical Staff at Oracle, leveraging expertise in Java, microservices, distributed systems, and Apache Kafka to support innovative solutions. Graduated from the National Institute of Technology Jamshedpur with a Bachelor's degree in Electrical and Electronics Engineering. Past experience includes roles at Samsung R&D Institute India and A.P. Moller - Maersk, focusing on software development, infrastructure improvement, and full-stack application design. Collaborated on agile teams to deliver scalable and efficient systems, contributing to high-quality outputs in dynamic environments.

Experience

6 yrs 4 mos

Total Experience

2 yrs 1 mo

Average Tenure

3 yrs 9 mos

Current Experience

Oracle

2 roles

Senior Member of Technical Staff

Promoted

Sep 2024 – Present · 1 yr 7 mos

Developed a Java-based rate control engine for multitenant systems, supporting precise, shared, and local delegation models to enforce dynamic tenant-database limits. Leveraged rule-based hashing to reduce server-client interactions by 90%, enabling the system to scale to 10,000+ requests per second across distributed brokers. Engineered a custom hash-based search tree algorithm for rule matching, utilizing recursive branching and prime key selection to reduce lookup complexity from O(n) to near-constant O(1). Implemented support for flexible conditions (e.g., path tokens, IP subdomains) and null handling to ensure granular enforcement across large rule sets. Fault Tolerance & High Availability Developed delegated rate limiting and local quota enforcement mechanisms to maintain system availability during network partitions or server outages. Enabled fault-tolerant request handling via cached grants and offline quota tracking, ensuring uninterrupted broker operations during central server downtime. Database Engineering & Security Developed "Bitrotter," a specialized fuzzing framework that captures Oracle TTC (Two-Task Common) packets to perform bit-flipping mutations, uncovering 100+ security vulnerabilities. Built a PL/SQL-based streaming pipeline to replicate DDLs between Oracle databases in near real-time, maintaining schema consistency across distributed environments. Technical Highlights Performance: Achieved O(1) lookup times and 90% reduction in network overhead. Scale: System validated at 10k+ requests/sec. Security: Identified and mitigated 100+ vulnerabilities in proprietary protocols.

JavaMicroservices

Member Technical Staff

Jul 2022 – Sep 2024 · 2 yrs 2 mos

Samsung r&d institute india

Engineer

Jul 2021 – Jul 2022 · 1 yr · Bengaluru, Karnataka, India

A.p. moller - maersk

SDE Intern

Jan 2021 – Jun 2021 · 5 mos · Bengaluru, Karnataka, India

I worked on the development of new features and fixing bugs in one of Maersk’s Dangerous Goods systems: SafeBook. I joined the team and helped build a strong .NET web application, contributing in both backend and frontend coding, and also collaborating in setting up the infrastructure and improving the monitoring and notification systems. Under the mentorship of the Solution Architect, I learnt about best practices in .NET coding and in software design, got into SQL management and took part in agile ceremonies.