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I'm Kanji Hirata, a Senior Software Engineer with over eight years of experience building scalable backend systems, primarily in Go, Java, and Python. I've spent my career at companies like Global Fashion Group and Luida, focusing on high-traffic search platforms and gaming infrastructure. I love taking features from the initial requirements all the way to production, and I have a strong passion for event-driven architectures and cloud-native development. Currently based in Karlsruhe, Germany, I'm eager to apply my systems expertise to solve complex problems in the GenAI space, where I can bridge robust engineering with cutting-edge models.…I'm Kanji Hirata, a Senior Software Engineer with over eight years of experience building scalable backend systems, primarily in Go, Java, and Python. I've spent my career at companies like Global Fashion Group and Luida, focusing on high-traffic search platforms and gaming infrastructure. I love taking features from the initial requirements all the way to production, and I have a strong passion for event-driven architectures and cloud-native development. Currently based in Karlsruhe, Germany, I'm eager to apply my systems expertise to solve complex problems in the GenAI space, where I can bridge robust engineering with cutting-edge models.

Kanji Hirata

Software Engineer, Back-End Developer, Full Stack Developer, +2

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I'm Kanji Hirata, a Senior Software Engineer with over eight years of experience building scalable backend systems, primarily in Go, Java, and Python. I've spent my career at companies like Global Fashion Group and Luida, focusing on high-traffic search platforms and gaming infrastructure. I love taking features from the initial requirements all the way to production, and I have a strong passion for event-driven architectures and cloud-native development. Currently based in Karlsruhe, Germany, I'm eager to apply my systems expertise to solve complex problems in the GenAI space, where I can bridge robust engineering with cutting-edge models.…I'm Kanji Hirata, a Senior Software Engineer with over eight years of experience building scalable backend systems, primarily in Go, Java, and Python. I've spent my career at companies like Global Fashion Group and Luida, focusing on high-traffic search platforms and gaming infrastructure. I love taking features from the initial requirements all the way to production, and I have a strong passion for event-driven architectures and cloud-native development. Currently based in Karlsruhe, Germany, I'm eager to apply my systems expertise to solve complex problems in the GenAI space, where I can bridge robust engineering with cutting-edge models.

Available to hire

I’m Kanji Hirata, a Senior Software Engineer with over eight years of experience building scalable backend systems, primarily in Go, Java, and Python. I’ve spent my career at companies like Global Fashion Group and Luida, focusing on high-traffic search platforms and gaming infrastructure. I love taking features from the initial requirements all the way to production, and I have a strong passion for event-driven architectures and cloud-native development. Currently based in Karlsruhe, Germany, I’m eager to apply my systems expertise to solve complex problems in the GenAI space, where I can bridge robust engineering with cutting-edge models.

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Work Experience

Senior Software Engineer at Global Fashion Group

May 1, 2023 - Present

Own backend development and production operation for a distributed search and recommendation platform serving 2,000+ RPS. Delivered search platform features end-to-end including requirements clarification, ranking logic design, index validation, deployment, monitoring, and production support. Re-architected ranking workflows by integrating behavioral signals with semantic search models to improve personalization and product discovery. Led a zero-downtime migration from Elasticsearch to OpenSearch using dual-write and phased traffic switching. Designed Kafka-based event pipelines for indexing and personalization to decouple search computation from core commerce services. Improved observability with Datadog and Prometheus dashboards for search latency, indexing health, traffic behavior, and incident response, collaborating with product, data, platform, and frontend teams.

Senior Backend Engineer at Luida

April 1, 2018 - December 31, 2021

Designed scalable backend services for a gaming platform using Go, Java, Python, Kafka, RabbitMQ, AWS, GCP, Docker, and Kubernetes. Built backend systems supporting 3,000+ RPS across real-time gaming and platform workflows. Developed independently deployable microservices by separating authentication, game-session logic, user activity, and platform operations. Implemented event-driven processing using Apache Kafka and RabbitMQ for real-time events, asynchronous jobs, and service-to-service communication. Designed multi-region infrastructure patterns on AWS and GCP to improve availability and fault tolerance. Built CI/CD workflows using Docker and Kubernetes to standardize deployment and release processes across teams. Collaborated with frontend, QA, DevOps, and product teams for production debugging and stable releases.

Full Stack Engineer at Simplex

April 1, 2017 - March 31, 2018

Developed backend financial services using Java, Spring Boot, REST APIs, SQL databases, React, and TypeScript. Built microservice-based backend modules for financial workflows, operational reporting, and internal transaction-related tools. Optimized REST API behavior by reducing redundant database queries and improving request/response handling for dashboard workflows. Built interactive React and TypeScript dashboards for operational and financial metrics. Added unit and integration tests to improve reliability across backend service logic and frontend data workflows. Worked end-to-end from requirements review and API implementation through frontend integration, testing, bug fixing, and release support while collaborating with backend, QA, product, and operations to improve production stability and data visibility.

Full Stack Engineer at EventHub

October 1, 2016 - February 28, 2017

Built frontend features for an event management platform using React, Redux, JavaScript, HTML5, CSS3, and REST APIs. Developed reusable UI components for event setup, attendee workflows, dashboard views, and event-management screens. Improved API integration logic by reducing duplicate data fetching and cleaning frontend state-management patterns. Supported backend integration and production debugging for event-related user workflows. Enhanced frontend performance through optimized rendering, component reuse, and clearer Redux state handling. Reviewed requirements with senior engineers, implemented assigned tickets, tested features, fixed bugs, and supported releases—building a foundation in React component architecture, API integration, debugging, and production support.