Isa Mert Gurbuz

Staff/Senior Backend & Platform Engineer with 7+ years of experience building and operating real-time, high-throughput, highly available systems across e-commerce, adtech, and healthcare. Leads cross-team platforms and technical initiatives from system and data design through production operations, incident response...

Amsterdam, Netherlands

Core Stack

Languages & backend: TypeScript/JavaScript, Java, Kotlin, Scala, Rust, Clojure, Haskell · JVM (Spring, Quarkus), Node.js (NestJS, Express.js), REST APIs, microservices, distributed and event-driven systems.

Data, infrastructure & practices: Kafka/Kafka Streams, PostgreSQL, BigQuery, Couchbase, Cassandra, DynamoDB · Kubernetes, Docker, AWS, GCP · OpenTelemetry, end-to-end testing, CI/CD, production operations, incident response.

Experience

Trendyol · E-commerce

Jul 2021 – Present

Software Engineer → Senior Software Engineer → Staff Software Engineer

  • Reduced ad overspend from 10–15% to below 1% by replacing scheduled batch jobs with a Kafka Streams pipeline processing 1 billion ad events per day. Cut processing latency from ~30 minutes to near-real-time.
  • Led an ad-fraud detection and automated-refund initiative across 6 teams, combining a data-science model with legacy detection. Reduced false positives and recovered 0.5% of daily ad consumption previously lost to incorrect fraud detection.
  • Re-platformed the stats subsystem from a single-source pipeline to a composable multi-source aggregation model, enabling batch and real-time systems to contribute to the same statistics. Reduced event-processing latency, added backpressure handling for peak load, and enabled automatic fallback to alternate data sources during upstream outages.
  • Led and delivered a GitOps migration for ~50 workflows on an internal orchestration platform used by 6 teams. Replaced manual UI-based upgrades with reviewable merge-request changes and added self-service scheduling, local development, and end-to-end testing.
  • Created TypeKube, a Deno/TypeScript toolkit adopted across ~10 internal teams to generate Kubernetes manifests, alerts, and dashboards from type-safe definitions. Standardized deployment and observability configuration across hundreds of services and repositories; local validation and compile-time checks cut new-service setup from hours to minutes.
  • Designed and built BigQuery-backed ads reporting and analytics systems, owning architecture from ingestion pipelines to query optimization. Built an end-to-end test framework using the BigQuery emulator for local pipeline testing.
  • Drove performance, infrastructure, and cost optimizations across Ads: halved request volume in a Store Ads integration, removed unused services and database indexes, and used a DSL-based design to avoid doubling recommendation-engine traffic.
  • Led incident response, recovery, and post-mortems for database, Kafka, and seller-facing migration incidents. Improved pipeline error delivery to surface previously silent failures and drove preventive fixes across service boundaries.
  • Mentored ~10 engineers, served on 5+ promotion committees, and led cross-team design reviews and technical planning. Helped establish dedicated technical-backlog capacity and team-health measurement.
  • Extended CodiMD into a documentation platform adopted across multiple teams. Built a separate frontend and a tag-based virtual-folder hierarchy for document categorization and discovery; integrated the platform with AI workflows through MCP and custom tooling.
  • Extended CodiMD into a documentation platform adopted across multiple teams. Built a separate frontend and a tag-based virtual-folder hierarchy for document categorization and discovery; integrated the platform with AI workflows through MCP and custom tooling.

Experience, continued

Software Engineer · Soostone / Well

Sep 2020 – Jul 2021
  • Built and maintained Node.js microservices for a healthcare platform on AWS using Lambda, DynamoDB, and Cognito; contributed to a Haskell backend and React applications in a distributed team.
  • Built an end-to-end design-to-application pipeline: a TypeScript Figma plugin used heuristics to interpret manually crafted, 30–40-page app journey designs and generate structured JSON; a Haskell validation and repair tool checked and corrected the output. Replaced weeks of manual design translation with automated generation, reducing turnaround from 2–3 weeks to 2–3 days.
  • Brought design and mobile/frontend engineering teams together to establish a shared design language, enabling direct code/JSON generation from designs and further shortening delivery times.

Software Engineer · Huawei

Sep 2019 – Sep 2020
  • Developed Java microservices for the CMS used to manage AppGallery applications; designed API endpoints and owned the development and maintenance of the CI/CD pipeline.
  • Served as technical lead for a newly formed team of ~10 Cordova developers adapting Huawei Mobile Services for third-party frameworks; designed projects, coordinated work allocation, conducted reviews, and guided delivery. Built cross-framework libraries with the React Native team and automated workflows using Bash.

Software Engineer · Akadumi.com · Freelance

Jun – Aug 2019
  • Built a course-commerce platform using Node.js, Express.js, MongoDB, React, and Next.js; deployed on GCP.

Earlier experience

Software Engineer · Civil Aviation Research and Application Center · Apr – Aug 2017
Built a Java/Kotlin tool for managing, archiving, and automating aviation test results with collaborative workflows.

Software Engineer Intern · Savronik · Jun – Sep 2016
Built a C++/Qt IDE and GUI designer for the D4D embedded graphics library, including C code generation and translation tooling.

Selected Open-Source Projects

More open-source projects and technical writing: github.com/isamert · isamert.net

Education

Eskisehir Technical University

2014 – 2018

Bachelor’s degree in Computer Engineering

Politechnika Krakowska

Fall 2017

Computer Engineering · Exchange semester