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Hi, I’m Reynald Simanjuntak, a Backend Engineer with 6+ years of experience building scalable systems in banking and financial services. I translate business requirements into reliable technical solutions using Java Spring Boot, API design, and system integration. I thrive on collaborating with cross-functional stakeholders—product, QA, and business teams—to deliver end-to-end systems that meet real-world needs while ensuring security, performance, and operational reliability.…Hi, I’m Reynald Simanjuntak, a Backend Engineer with 6+ years of experience building scalable systems in banking and financial services. I translate business requirements into reliable technical solutions using Java Spring Boot, API design, and system integration. I thrive on collaborating with cross-functional stakeholders—product, QA, and business teams—to deliver end-to-end systems that meet real-world needs while ensuring security, performance, and operational reliability.

Reynald Simanjuntak

Back-End Developer, Full Stack Developer, App Developer, +5

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Hi, I’m Reynald Simanjuntak, a Backend Engineer with 6+ years of experience building scalable systems in banking and financial services. I translate business requirements into reliable technical solutions using Java Spring Boot, API design, and system integration. I thrive on collaborating with cross-functional stakeholders—product, QA, and business teams—to deliver end-to-end systems that meet real-world needs while ensuring security, performance, and operational reliability.…Hi, I’m Reynald Simanjuntak, a Backend Engineer with 6+ years of experience building scalable systems in banking and financial services. I translate business requirements into reliable technical solutions using Java Spring Boot, API design, and system integration. I thrive on collaborating with cross-functional stakeholders—product, QA, and business teams—to deliver end-to-end systems that meet real-world needs while ensuring security, performance, and operational reliability.

Available to hire

Hi, I’m Reynald Simanjuntak, a Backend Engineer with 6+ years of experience building scalable systems in banking and financial services. I translate business requirements into reliable technical solutions using Java Spring Boot, API design, and system integration.

I thrive on collaborating with cross-functional stakeholders—product, QA, and business teams—to deliver end-to-end systems that meet real-world needs while ensuring security, performance, and operational reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Indonesian

Fluent

English

Advanced

Work Experience

Backend Engineer at PT Bank DKI

November 1, 2024 - September 1, 2025

Designed, developed, and maintained Java-based Spring Boot backend services for online banking and loan operations in a high-concurrency production environment. Led backend implementation for the JO M -> VELLO transformation, including secure authentication, device binding, and improved transaction flow. Supported CI/CD pipelines using Jenkins and Nexus, delivering services to OpenShift/Kubernetes environments with a strong emphasis on security, reliability, and compliance.

Technical Consultant at PT Midas Daya Teknologi

March 1, 2022 - November 1, 2024

Provided system consulting on core banking operations, focusing on transaction stability and banking regulation adherence. Established connections between client stakeholders and engineering teams, acted as a technical liaison to analyze and resolve critical system issues, and supported production ops including incident management, root-cause analysis, and system optimization.

Technical Liaison at Astra Graphia Information Technology

February 1, 2020 - February 1, 2022

Acted as a technical liaison between stakeholders, operations, and engineering teams to analyze and resolve critical system issues. Contributed to debugging, testing, and maintenance of application modules, and supported team knowledge sharing.

Backend Engineer at PT. Bank DKI, Tbk

November 1, 2024 - September 1, 2025

Designed and delivered scalable Java Spring Boot backend services supporting digital banking and loan systems in high-concurrency production environments. Translated business requirements into robust technical solutions, improving transaction flow, authentication mechanisms, and overall system reliability. Contributed to the JOM → VELLO transformation, enhancing security features such as device binding and secure authentication flows. Developed and maintained RESTful APIs with strong focus on security, compliance, and performance optimization. Collaborated with cross-functional stakeholders (product, QA, business) to ensure alignment between system behavior and business expectations.

Technical Consultant at PT. Midas Daya Teknologi

March 1, 2022 - November 1, 2024

Provided technical consulting for core banking systems, focusing on transaction stability, regulatory compliance, and system performance. Acted as a bridge between business stakeholders and engineering teams to analyze issues and define solution strategies. Collaborated with multiple stakeholders to align system behavior with business requirements and operational needs. Supported production operations, including troubleshooting, system optimization, and continuous improvement initiatives.

Software Developer at PT. Astra Graphia Information Technology

February 1, 2020 - February 1, 2022

Developed key components of applications as directed by team leaders. Contributed to debugging, testing, and maintenance of the application modules in cooperation with senior engineers. Contributed to technical documentation and supported team knowledge sharing skills.

Full-Stack Engineer at PT. KAP

March 1, 2025 - April 1, 2026

Led end-to-end development of a tax management system, covering backend, frontend, and database design. Translated business requirements into system workflows through direct collaboration with stakeholders. Designed and implemented scalable backend modules for quotation, invoicing, and contract management. Developed responsive frontend interfaces to support multiple user roles (Admin, Manager, PIC, Finance) and implemented document generation with secure file handling and metadata-based storage.

Software Developer at PT Astra Graphia Information Technology

February 1, 2020 - February 1, 2022

Developed key components of applications as directed by team leaders. Contributed to debugging, testing, and maintenance of application modules in cooperation with senior engineers. Contributed to technical documentation and supported team knowledge sharing.

Full-Stack Engineer at PT KAP

March 1, 2025 - April 1, 2026

Led end-to-end development of a tax management system, covering backend, frontend, and database design. Translated business requirements into system workflows through direct collaboration with stakeholders. Designed and implemented scalable backend modules for quotation, invoicing, and contract management. Developed responsive frontend interfaces to support multiple user roles (Admin, Manager, PIC, Finance). Implemented document generation and secure file handling with metadata-based storage.