Open to opportunities

Ruan Candido

@ruancandido

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Senior Backend Java Developer with expertise in scalable APIs.

Brazil

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What I'm looking for

I am looking for a role that fosters innovation, collaboration, and growth opportunities.

As a Senior Backend Java Developer with over 6 years of experience, I specialize in designing scalable APIs and data services using Java and Go. My career has been marked by a proven track record in delivering robust, production-grade systems across various sectors, including fintech, retail, and insurance. I possess a strong understanding of fraud and compliance domains, ensuring secure integrations with both legacy and cloud-based infrastructures.

Throughout my professional journey, I have demonstrated an empathetic collaboration style and a high-ownership mindset. My deep experience in microservice ecosystems and high-throughput environments has enabled me to lead significant projects, such as the design and rollout of secure integrations handling over 10,000 daily purchase orders. I thrive in challenging environments where I can leverage my technical skills in Java, Spring Boot, and cloud technologies to drive impactful results.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Accenture

Jan 2025 - Present (4 months)

Led the design and rollout of a secure integration handling over 10K daily purchase orders, interfacing with external compliance and inspection APIs. Built and maintained backend APIs in Java 21 / Spring Boot 3 within a modular microservices architecture, ensuring high availability and resiliency. Integrated with Oracle RSB and SOAP/REST systems, ensuring backward-compatible support for legacy com

Spring Boot Microservices API Integration Oracle RSB SOAP REST Compliance High Availability Resiliency Soap Rest

Senior Backend Engineer

Logic Information Systems

Feb 2022 - Dec 2024 (2 years 10 months)

Architected and scaled over 15 Spring Boot services, handling 20K+ daily retail transactions across LATAM with uptime exceeding 99.95%. Implemented Go-based microservices and BigQuery pipelines processing 500 GB/day, significantly reducing data latency for fraud analytics. Spearheaded integrations with Oracle Retail, automating critical compliance reporting workflows and eliminating 90% of manual

Spring Boot Go Microservices BigQuery Data Pipelines Compliance Reporting Scalability

Java Developer

Nova Tendência Informática

Jan 2019 - Dec 2021 (2 years 11 months)

Delivered five greenfield insurance platforms with end-to-end microservice architecture using Java and Quarkus. Exposed REST and gRPC APIs utilized by multiple squads, supporting low-latency fraud validation and claim processing flows. Replaced legacy batch jobs by connecting COBOL systems via async queues, cutting policy issue latency by 45%.

Java Quarkus Microservices REST APIs gRPC Validation COBOL

Education

Degrees, certifications, and relevant coursework

Estácio de Sá

BSc Systems Analysis and Development, Systems Analysis and Development

Currently pursuing a Bachelor of Science in Systems Analysis and Development. Focusing on the principles of system design, software development, and project management.

Cefet/RJ

BSc Production Engineering, Production Engineering

Completed a Bachelor of Science in Production Engineering. Gained expertise in optimizing production processes, supply chain management, and quality control.