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Daniel Kobashigawa

@danielkobashigawa

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Senior Java Engineer with 7+ years building high-throughput microservices for FinTech and Enterprise SaaS on AWS/GCP.

Portugal

Message

What I'm looking for

I’m looking for a role where I can build cloud-native, event-driven Java microservices on AWS/GCP—improving performance, reliability, and messaging at scale—while owning production-grade backend architecture and delivery pipelines.

I’m a Senior Java Engineer with 7+ years building high-throughput microservices for FinTech and Enterprise SaaS. I specialize in Java 21, Spring Boot, and cloud-native architectures on AWS and GCP, with a focus on event-driven systems for real-time communication at scale.

In my recent role, I designed and developed Java 21 and Spring Boot microservices for a Cloud Contact Center platform, integrating with GCP Pub/Sub for high-volume message routing and sub-second delivery guarantees. I also improved production reliability and operations by introducing structured logging and distributed tracing across services.

Across prior work, I built RESTful microservices and managed infrastructure with Infrastructure as Code on AWS using Terraform. I led architecture reviews for new integrations, implemented automated deployment pipelines with GitHub Actions and Docker, and mentored two mid-level engineers on Spring internals, testing strategies, and cloud-native design patterns.

I’m driven by production-grade backend systems: fast APIs, dependable messaging, and maintainable services. I back that approach with strong testing practices (JUnit 5, Mockito, contract testing) and industry-recognized certifications including Oracle Java SE 17, Spring Professional, CKAD, and AWS Certified Developer—Associate.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Engineer

Current

Five9

Nov 2024 - Present (1 year 8 months)

Designed and developed Java 21 and Spring Boot microservices for Five9’s Cloud Contact Center, integrating with GCP Pub/Sub for high-volume message routing. Led architecture reviews, implemented query optimization, and improved release speed and production incident resolution with CI/CD and observability practices.

Java 21+Spring Boot Microservices GCP Query Optimization GitHub Actions Docker CI CD Fault Tolerance

Consultant Java Developer

Aubay

Nov 2022 - Nov 2024 (2 years)

Developed Java 17 and Spring Boot backend microservices for BMW Connected Drive, processing real-time telemetry data. Managed AWS infrastructure with Terraform, automated CI/CD with GitHub Actions, and integrated OAuth2 identity providers to meet automotive compliance needs.

Spring Boot REST APIs Microservices AWS Terraform Amazon RDS Amazon SQS Amazon ECS Infrastructure as Code GitHub Actions CI CD OAUTH2 Security

Mid-level Backend Developer

Mobiauto

Feb 2022 - Oct 2022 (8 months)

Built backend APIs and data ingestion pipelines for Mobiauto’s automotive marketplace. Used Spring Batch and Elasticsearch for indexing/search and optimized PostgreSQL queries for lead deduplication and ranking.

Elasticsearch PostgreSQL Data Pipelines Indexing Query Optimization Deduplication

Mid-level Java Developer

Docket Brasil

Apr 2021 - Jan 2022 (9 months)

Developed RESTful API endpoints and asynchronous document processing workflows for Docket Brasil’s document registry platform. Implemented RabbitMQ-based parsing and validation jobs, integrated PostgreSQL with Spring Data JPA for multi-tenant isolation, and maintained JUnit 5 and Mockito tests.

REST APIs Asynchronous RabbitMQ PostgreSQL Junit Mockito Integration Testing

Junior Java Developer

Docket Brasil

May 2019 - Apr 2021 (1 year 11 months)

Contributed to REST API development for Docket Brasil’s document registry platform, fixing issues in Spring Boot services and improving error handling. Wrote SQL migration scripts and participated in code reviews under guidance.

Spring Boot REST APIs Error Handling SQL Code Review

IT Assistant

Docket Brasil

Jun 2018 - May 2019 (11 months)

Provided technical support for internal development systems at Docket Brasil, including environment setup assistance and issue triage. Automated routine IT tasks using Bash scripts to reduce manual workload for the support team.

Technical Support Development Environment Setup Technical Triage Bash Scripting Developer Support