Headline

Backend Engineer @ Oracle | Java · Spring Boot · Kafka · Kubernetes | Distributed Systems | Microservices | Open to SDE-2 roles | IIIT Jabalpur

About

I build distributed, cloud-native backend systems for carrier-grade 5G infrastructure at Oracle. For the past 2.5 years I've been part of the 5G Policy Control Function (PCF) team, working on the backend components that enforce real-time policy decisions for millions of 5G subscribers — covering 3GPP interfaces (N7, N15, N28) and integrations with core network functions like SMF, AMF, and CHF. Outside of Oracle, I've built personal projects to sharpen my distributed systems thinking — a Kafka-based order processing system and a clustered job scheduler with leader election and Redis-based distributed locking. 🛠 Tech I work with daily: Java · Spring Boot · Apache Kafka · Kubernetes · Docker · PostgreSQL · Redis · REST APIs · Python 📍 Bengaluru | Open to Backend SDE-2 roles at product companies, fintech, infrastructure, or telecom tech 📬 ujjawalkumar1223@gmail.com

Location

Bengaluru

AI stack

antigravity

codex

opencode

Work experience

Application Software Engineer - 2 at Oracle, Aug 2023 - Present · 3 y 2 mo, Bengaluru, * Leading design of a Python-based orchestration tool for zero-downtime multi-site GR PCF upgrades with live traffic continuity validation using PerfGo * Designed RESTful APIs for 5G PCF policy enforcement per 3GPP N7/N15/N28 specs, integrating with SMF, AMF, and CHF network functions * Architected pod-level congestion control across Kubernetes microservices — reduced request failure rates by 27% * Implemented mTLS authentication across 15+ services; zero-downtime rollout orchestration cut failed deployments by 25% * Built AI-driven log triage system + Jira/Slack integration — reduced MTTR by 30%, on-call time by 35% * Optimized CI/CD pipelines: 24 hrs → 9 hrs runtime (55%+ improvement) * Skills: Java · Spring Boot · Apache Kafka · Kubernetes · Docker · PostgreSQL · Redis · Python · REST API Design · Distributed Systems

Software Engineering Intern at Oracle, Jan 2023 - Jul 2023 · 7 mos, Bengaluru, * Built automated validation pipelines for 120+ regression scenarios across 5G PCF features — 45% increase in release coverage * Resolved Kubernetes deployment failures across test environments, improving backend build stability

Education

Bachelor of Technology - BTech, computer science and engineering, Indian Institute of Information Technology, Design and Manufacturing, Jabalpur