Hi, I'm Raushan Kumar
🚀 Senior Software Engineer @ Oracle | 💡 Distributed Systems Expert
Building scalable microservices serving 400M+ users 🌍
7.5 years architecting high-performance systems 🏗️
Passionate about cloud infrastructure, data pipelines & emerging tech ⚛️
👨💻 About Me
Senior Software Engineer | Backend Specialist | Cloud Architect
🎯 Professional Journey
I'm a Senior Software Engineer at Oracle with 7.5 years of experience building scalable distributed systems and microservices. My expertise spans backend engineering, cloud infrastructure (OCI, GCP, Azure), and data pipeline orchestration.
At Oracle, I architect high-performance notification microservices handling 400k+ daily requests, achieving 40% latency reduction and 60% faster notification delivery. Previously at PayPal, I built the Data Lineage Orchestration Platform serving 400M+ users across 500+ critical data pipelines.
My track record includes improving system performance by 70%+, achieving 85%+ test coverage, and reducing production incidents by 50%. I'm passionate about building robust, scalable solutions that make a real impact.
💡 Beyond Work
I explore quantum computing, AI/ML, and emerging technologies. Always learning, always building!
💼 Professional Experience
Building scalable systems at leading tech companies
Oracle
- Architected notification microservices handling 400k+ daily requests, achieved 40% latency reduction through httpClient optimization
- Designed secure async payload transformation service with Redis queuing and Node.js sidecar, maintaining 99.9% uptime
- Implemented real-time WebSocket messaging reducing notification delivery time by 60%, improving user engagement by 35%
- Increased test coverage from 45% to 85%+, reducing production incidents by 50% and accelerating releases by 30%
- Enhanced observability with OpenTelemetry, Prometheus metrics, and Helm-based orchestration
PayPal
- Built Data Lineage Orchestration Platform integrating Apache Spark & Spline, tracking 500+ critical data pipelines serving 400M+ users
- Automated Control-M ETL metadata extraction to Elasticsearch, increasing efficiency by 70% and reducing manual overhead by 90%
- Developed REST APIs for data lineage (Control-M, Informatica, Hive), integrated with Datahub serving 100+ downstream consumers
- Implemented production monitoring with GCP Stackdriver, reducing MTTR by 45%
- Engineered SQL query parser extracting lineage from 10,000+ queries with 99.5% accuracy
Otis Elevator (United Technologies)
- Developed Twilio-based real-time video streaming for elevator emergency communications, deployed across 500+ buildings, reducing response time by 40%
- Built secure TLS-enabled Python microservice for iOS-IMX6 communication with TCP/IP endpoints
- Integrated Paho-MQTT client with Azure IoT Hub, achieving 99.8% message delivery across 1,000+ devices
- Implemented PyQt/QML RTSP video streaming with overlay, deployed on ARM controllers in 300+ installations
🛠️ Technical Expertise
Core technologies and tools I work with
💻 Languages
- Java (Expert)
- Python (Advanced)
- JavaScript (Proficient)
- SQL (Advanced)
- Bash/Shell Scripting
🚀 Frameworks & Tools
- Spring Boot
- Helidon (JAX-RS)
- Apache Kafka
- Apache Spark
- Node.js, Flask, PyQt
☁️ Cloud & DevOps
- Oracle Cloud (OCI)
- Google Cloud Platform
- Azure IoT Hub
- Docker & Kubernetes
- Helm, Prometheus, Grafana
🗄️ Databases & Messaging
- Oracle Database
- Elasticsearch
- BigQuery
- ArangoDB, Redis
- MQTT, ZeroMQ
🤖 AI/ML & Modern Tools
- Claude AI
- GitHub Copilot
- OpenAI (GPT-4, Codex)
- LLM-assisted Development
- TensorFlow Basics
🎨 Architecture & Practices
- Microservices Architecture
- Distributed Systems
- REST APIs, WebSocket
- Event-Driven Design
- TDD, CI/CD, Git
🚀 Featured Projects
Key projects and contributions
Oracle Systems
Notification Microservices
High-performance notification system handling 400k+ daily requests with WebSocket integration, async processing, and comprehensive monitoring.
View WorkPayPal Platform
Data Lineage Orchestration
Enterprise platform tracking 500+ data pipelines with Apache Spark, Spline, and custom parsers serving 400M+ users with 99.5% accuracy.
ExploreData Streaming
Kafka Implementations
Enterprise-scale Kafka streaming solutions with event-driven architectures and real-time data processing at PayPal and Oracle.
View ProjectIoT Solutions
Elevator Emergency Systems
Real-time video streaming with Twilio, MQTT integration with Azure IoT Hub, and PyQt/QML solutions deployed across 500+ buildings.
Learn MoreSearch & Analytics
Elasticsearch Solutions
High-performance search implementations with distributed indexing, full-text search capabilities, and real-time data analysis.
View ProjectBig Data
BigQuery Analytics
Scalable data warehouse solutions with optimized queries, data pipelines, and advanced analytics for business intelligence.
View Project🎓 Education & Recognition
Academic background and professional achievements
🎓 Education
Indian Institute of Information Technology Una
Bachelor of Technology
Electronics and Communication Engineering
📅 2014 – 2018 | 📍 Una, India
📜 Certifications
🏆 Awards & Recognition
Spot Award
PayPal | November 2023
Outstanding contribution to Data Lineage Platform
TITAN Award
Otis Elevator | 2020
Excellence in IoT solutions and video streaming
POB Award
Otis Elevator | 2019
Project of the Year recognition
💬 Let's Connect
Open to opportunities, collaborations, and tech discussions
🤝 Let's Build Something Great!
Whether you want to discuss distributed systems, collaborate on innovative projects, or explore opportunities—I'm always excited to connect with fellow technologists and builders!
📧 ping.raushan@gmail.com | 📍 Bengaluru, India