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Ahmet Filiz

@ahmetfiliz

Lead Engineer at Personio who resolved a Documents service dependency, fixed a DocuSign race condition, and published an API impact-reporting skill.

United Kingdom

Message

At Personio, I lead a team of 8 engineers and guide technical roadmaps and delivery across services spanning a legacy monolith and microservices. I eliminated a circular dependency on the Documents service’s list documents endpoint and fixed a DocuSign race condition that caused intermittent document upload and preview problems.

At Noon Academy, I led backend architecture for core learning platform services and optimized the 10 most-consumed APIs to bring P95 latency below one second. I also established Datadog alerting, improved security practices, and refactored unit testing infrastructure to reduce CI/CD build times by 35%.

Experience

Work history, roles, and key accomplishments

Current

Lead Engineer

Current

Personio

Apr 2026 - Present (6 months)

Lead a team of 8 engineers, driving technical roadmap, architecture decisions, and code quality. Own end-to-end delivery from design to production monitoring across legacy monolith and microservices.

Kotlin PHP Spring Framework Laravel JOOQ gRPC MySQL PostgreSQL AWS Kafka Redis Datadog Claude Enterprise Microservices Agile Development GitHub Code Review Unit Testing

Principal Engineer (Backend Lead)

Noon Academy

Apr 2022 - Apr 2026 (4 years)

Lead backend architectural roadmap for core learning platform services, overseeing a distributed team. Direct end-to-end service delivery from requirements to production monitoring and incident response.

Java Kotlin MySQL MongoDB Redis TigerGraph Spring Boot Microservices AWS Datadog Kubernetes Hibernate Junit GitHub Code Review Agile Development Unit Testing

Software Developer

Siemens PSE

Feb 2021 - Apr 2022 (1 year 2 months)

Full stack development, end to end product feature development and maintenance. Improved UI responsiveness and product component performance.

Java Gerrit JUnit4 Gradle Jenkins Frontend Development Code Review Agile Development Unit Testing

Automation Tool Software Developer

Nokia

Aug 2018 - Feb 2021 (2 years 6 months)

Backend tool development for Nokia global employees. Analyzed requirements, designed, developed, documented, and maintained applications.

Java Python Spring Framework SQL Hibernate SoapUI Docker Ansible TextFSM Jinja Pytest Netmiko Agile Development Code Review Unit and Integration Testing

Application Development Specialist

Innova Business Solutions

Jun 2013 - Aug 2018 (5 years 2 months)

Full stack development in a company critical project integrated with more than 50 external systems. Analyzed requirements, designed, developed, documented, and maintained applications.