I'm a Sr. Staff-level engineer specialising in real-time, event-driven systems for financial services. I build streaming platforms that have to be correct under load — where a dropped event is a reconciliation break, not a retry.
Most of my work sits on Apache Kafka and Apache Flink. I architected and led the development of an event-driven platform processing transactional and reconciliation data across core banking systems: strict ordering guarantees, backward-compatible Avro schema evolution, exactly-once delivery, and event-time semantics that handle late and out-of-order arrivals without compromising financial-grade consistency.
Beyond the pipelines, I own the harder architectural calls — event sourcing for auditable, replayable state transitions; polyglot persistence across Cassandra and Oracle; Kafka topology and partition strategy from topic design through broker tuning; reconciliation frameworks that catch data drift between ingestion, processing, and downstream consumption.
Most recently, I led the technical transformation of an internally scoped banking platform into a SaaS-ready, multi-tenant product — defining tenancy boundaries, data isolation, and onboarding for deployment across ING country entities globally, working closely with infrastructure, compliance, and product.
I act as the technical authority on Kafka and Flink for my team, spanning both sides of the discipline: developer-facing (stream design, schema evolution) and operational (cluster health, scaling, deployment, rollback).
Core: Apache Kafka · Apache Flink · Event Sourcing · Stream Processing · Avro / Schema Registry · Cassandra · Oracle · Spring Boot · Multi-tenant SaaS Architecture
My technology stack includes:
1. Backend: Java21/25, Spring(Boot, Cloud, Security), Microservices, Apache Kafka, Apache Flink, Redis, Jenkins, Docker, Kubernetes
2. Frontend: JavaScript, Typescript, React, Redux, React queries, React Hook Form, etc.
* 🖥️ See my portfolio at ggorantala.dev
* ✉️ You can contact me at @twitter
* 🚀 I'm currently working on sharing everything I know
* 🧠 I'm learning Advanced DSA and Mathematics
* 🤝 I'm open to collaborating on Java, Spring, Microservices, React, and other cool stuff
* ⚡ Digital Nomad
