Senior Backend Java Engineer – REST & Security Focus

PT Holink Solusi Digital; Jakarta Utara; On-site; IDR 360,000,000 - 600,000,000; Full time

Job summary

HoLink Solusi Digital is seeking an experienced Backend Developer to enhance and maintain scalable backend features for their platform. You will design, develop, and integrate REST APIs while collaborating with Product, Design, QA, and Support teams to deliver robust services.

Applicants should have 3–5+ years of backend experience, strong Java/Spring Boot skills, and a solid grasp of authentication, authorization, and database design.

Qualifications

• 3–5+ years hands-on Backend Development or Software Engineering.
• Strong proficiency in Java, Spring Boot, and REST API development.
• Solid understanding of authentication, authorization (JWT, RBAC), and application security.
• Strong SQL/MySQL skills, including database design and query optimization.
• Experience debugging, maintaining, and optimizing large existing codebases.
• Familiar with system performance, logging, monitoring, and production troubleshooting.
• Experience with Redis, MongoDB, or message queues (Kafka, RabbitMQ, RocketMQ) is a plus.
• Experience integrating payment gateways, third‑party APIs, or webhooks is preferred.
• Experience in SaaS, software, or digital product companies is a strong plus.

Responsibilities

• Develop and maintain scalable backend features for Holink’s platform.
• Build reliable backend services.
• Design, develop, and integrate REST APIs.
• Collaborate closely with Product, Design, QA, Support, and Engineering teams.
• Integrate third-party services including payment gateways, analytics, authentication, notifications, and future AI solutions.
• Optimize application performance, database efficiency, and system reliability.
• Troubleshoot and resolve product, system, and production issues.
• Maintain code quality through testing, code reviews, and engineering best practices.
• Support deployment and monitor application logs and errors.
• Ensure security, privacy, and scalability standards are implemented across the platform.

Skills

Java

Spring Boot

REST API development

Authentication & Authorization

JWT & RBAC

SQL/MySQL

Code debugging & maintenance

Performance Monitoring

Production Troubleshooting

Tools

Redis

MongoDB

Kafka

RabbitMQ

RocketMQ

Job description

HoLink Solusi Digital is seeking an experienced Backend Developer to enhance and maintain scalable backend features for their platform. You will design, develop, and integrate REST APIs while collaborating with Product, Design, QA, and Support teams to deliver robust services.

Applicants should have 3–5+ years of backend experience, strong Java/Spring Boot skills, and a solid grasp of authentication, authorization, and database design.