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subramanians29/README.md

Subramanian S — Senior Backend Engineer

Backend engineer approaching 5 YOE building production microservices on Spring Boot and AWS. Currently focused on distributed systems, event-driven architecture, and cloud-native backends.

Open to Senior Backend / Platform roles in Germany. EU Blue Card eligible · Available in 90 days · English fluent · German A1

Tech I work with regularly

Core: Java 17/21 · Spring Boot 3.x · Spring Data JPA · Hibernate
Messaging: Kafka · RabbitMQ
Data: Oracle · PostgreSQL · Elasticsearch · Redis · MongoDB Infra: Docker · Kubernetes · AWS (ECS, EC2, RDS) · GitLab CI/CD
Observability: Prometheus · Structured Logging · Distributed Tracing
Patterns: Microservices · Event-driven · DDD · Transactional Outbox · Idempotency

Projects

Repo What it is
wallet-transfer-event-processing Event-driven fintech backend — Transactional Outbox, Optimistic Locking, Idempotency via Redis, Kafka, DDD
tracker Logistics parcel tracking API — RabbitMQ + Kafka, JWT auth, MongoDB, Docker
flow-tenant Orchestrated SAGA with retry, idempotency, and outbox pattern - Kotlin, Spring Boot 4, Java 21 virtual threads

📍 Bangalore, India  ·  LinkedIn  ·  Open to relocation

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  1. wallet-transfer-event-processing wallet-transfer-event-processing Public

    Event-driven fintech backend - Transactional Outbox, Optimistic Locking, Idempotency via Redis, Kafka, DDD, Spring Boot 3.3

    Java

  2. tracker tracker Public

    Logistics parcel tracking API — RabbitMQ + Kafka async messaging, JWT auth, MongoDB, Docker Compose

    Java

  3. rag rag Public

    RAG REST API in Java - Langchain4j, pgvector, local ONNX embeddings(MiniLM), Spring Boot 3.3

    Java

  4. flow-tenant flow-tenant Public

    Production style reference architecture for multi-tenant backend systems. Orchestrated SAGA with retry, idempotency, and outbox pattern - Kotlin, Spring Boot 4, Java 21 virtual threads

    Kotlin