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Ömer Kıncal

@merkncal

Backend engineer at Laminar building its Java and Spring Boot backend; migrated Turkish Airlines’ legacy rule engine to Drools.

Turkey

Message

At Laminar, I’m building the backend of a platform connecting early-stage startups with investors, including its REST APIs, data model, and service architecture in Java and Spring Boot. I’m responsible for the work end to end, from API design and persistence to deployment.

At Turkish Airlines, I migrated an outdated rule-engine application to Drools on Java and Spring Boot, preserving existing behaviour while making accumulated business rules more maintainable. At Yıldız Holding, I built and maintained microservices within an approximately 80-service B2B e-commerce platform, and at Catchsoft I more than halved API response times through query optimisation and caching.

Experience

Work history, roles, and key accomplishments

Current

Founding Engineer

Current

Laminar

Apr 2026 - Present (5 months)

Building the backend of Laminar, a platform connecting early-stage startups with investors, including REST APIs, data model, and service architecture in Java and Spring Boot. Responsible end to end for architecture, API design, persistence, and deployment within a small founding team.

Java Spring Boot REST APIs Architecture API Design Persistence Deployment

Current

Freelance Developer

Current

Zoho Applications

Jan 2026 - Present (8 months)

Building and customising Zoho applications for a startup client, including custom modules, workflow automation, and integrations between Zoho and external systems. Ongoing freelance engagement, scoped and delivered independently.

Zoho Custom Modules Workflow Automation API Integration

Java Software Engineer

ID3

May 2024 - Apr 2026 (1 year 11 months)

Consultant engineer placed full-time with two enterprise clients, working on microservices and legacy system migration. Delivered in agile sprints with cross-functional teams on tight release cycles and reviewed colleagues' code against shared standards.

Java Kotlin Spring Boot Kafka Redpanda Redis Couchbase MongoDB AWS HashiCorp Vault Kibana Kubernetes OpenShift Drools Kogito Oracle DB

Java Software Engineer

ABAS

Feb 2024 - Apr 2024 (2 months)

Extended ERP business processes in Java and diagnosed production defects affecting system stability.

Java ERP

Java Developer

Catchsoft

Jun 2023 - Jan 2024 (7 months)

Built and maintained backend services and REST APIs with Java, Spring Boot, PostgreSQL, Hazelcast, and Docker. More than halved API response times by removing nested-loop complexity, optimising queries, and introducing a Hazelcast caching layer. Onboarded new engineers and ran daily standups and sprint ceremonies.

Java Spring Boot PostgreSQL Hazelcast Docker REST APIs Performance Optimization Caching