I'm a backend and cloud engineer based in Munich, currently working at Concept Reply on large-scale e-commerce infrastructure. I hold an MSc in Informatics from the Technical University of Munich and have spent the last few years building distributed systems across e-commerce, fintech, and IoT domains.
I enjoy working close to the architecture — microservices, event-driven systems, cloud infrastructure — and I care about writing code that's observable, testable, and maintainable by the next person.
📫 hasanheroglu@gmail.com · LinkedIn
Languages: TypeScript, Java, JavaScript, SQL
Backend: NestJS, Spring Boot, Node.js
Cloud & Infra: AWS (ECS, DynamoDB, S3, Lambda), Terraform, Kubernetes
Messaging: Kafka, RabbitMQ, ActiveMQ, AMQP, MQTT
Databases: PostgreSQL, MongoDB, DynamoDB
Observability: Grafana, AWS CloudWatch
Testing: Jest, JUnit, Mockito, Testcontainers
Software Consultant — Concept Reply (Nov 2024 – Present)
Working on the backend platform for OBI, one of Europe's largest home improvement retailers. Building and operating NestJS microservices on AWS, managing infrastructure with Terraform, and handling event-driven communication across services via Kafka and RabbitMQ.
Working Student — Siemens AG (Sep 2022 – Oct 2024)
Contributed to W3C Web of Things research projects at Siemens. Built a full-stack preference management application for smart environments and integrated a fuzz/penetration testing library into an Electron-based desktop tool.
Software Consultant — OBSS (Aug 2020 – Apr 2022)
Developed settlement batch processing for a banking platform, implemented RabbitMQ event infrastructure, and containerized application components with Docker.
I've contributed to several projects in the W3C Web of Things and Eclipse Thingweb ecosystems:
MSc in Informatics — Technical University of Munich (2022 – 2024)
BSc in Computer Engineering — Istanbul Technical University (2015 – 2020)
Exchange Program — Technical University of Denmark (2017 – 2018)