API TestingCommunicationGitJavaMySQLPostgreSQLPostmanSQLSpring BootSwaggerTeamworkTroubleshooting
Deskripsi
Deskripsi pekerjaan Lowongan Java Programmer PT Nextgen Inovasi Indonesia
Job Overview
Java Back-End Developer will support the development and maintenance of Java-based back-end applications for digital payment systems, API integrations, payment gateways, QRIS, virtual accounts, e-wallets, and internal transaction-supporting systems.
The ideal candidate should have a solid foundation in Java programming, understand REST APIs and databases, and be able to work under the guidance of Middle or Senior Developers and the Technical Lead.
Technical Qualifications
Minimum of 2 year of experience as a Back-End Developer using Java.
Good understanding of Java and basic object-oriented programming concepts.
Basic understanding of the Spring Boot framework.
Understanding of REST APIs, JSON, HTTP methods, request-response flows, and HTTP status codes.
Ability to develop simple APIs based on business requirements or technical instructions.
Basic understanding of relational databases such as PostgreSQL, MySQL, or Oracle.
Ability to write basic SQL queries, including SELECT, INSERT, UPDATE, DELETE, JOIN, and data filtering.
Basic understanding of transaction handling and error handling.
Familiarity with Git operations, including pull, commit, push, branch management, and merge or pull requests.
Basic knowledge of unit testing using JUnit or similar tools is an advantage.
Familiarity with Postman or Swagger for API testing and documentation.
Basic knowledge of Docker is an advantage.
Basic understanding of API security, including API keys, tokens, basic authentication, or JWT, is an advantage.
Willingness to learn about microservices, message brokers, CI/CD, logging, monitoring, and secure coding practices.
Digital Payment Domain Qualifications
Strong interest in learning about digital payment systems, payment gateways, QRIS, virtual accounts, e-wallets, switching systems, and bill payment platforms.
Understanding of, or willingness to learn, transaction flows such as inquiry, payment, callback, refund, settlement, and reconciliation.
Basic understanding of transaction statuses such as pending, paid, failed, expired, cancelled, and refunded is an advantage.
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Strong attention to detail when processing transaction-related data.
Awareness of the importance of protecting customer data, transaction data, credentials, and source code.
Key Responsibilities
Support the development of Java and Spring Boot-based back-end services.
Develop or improve simple APIs under the guidance of Middle or Senior Developers and the Technical Lead.
Support integrations with internal and external systems using REST APIs.
Create and maintain database queries required by the application.
Perform bug fixing for straightforward defects based on technical guidance.
Conduct API testing using Postman, Swagger, or similar tools.
Develop basic unit tests.
Review application logs to support issue analysis and troubleshooting.
Assist in preparing technical documentation, including API notes, technical notes, and system change documentation.
Follow applicable coding standards, branching strategies, and development procedures.
Collaborate with Developers, Quality Assurance, Business Analysts, and the Technical Lead in completing project and sprint tasks.
Non-Technical Qualifications
Strong willingness to learn and improve.
Detail-oriented, especially when handling transaction-related tasks.
Able to follow technical guidance from Senior Developers or the Technical Lead.
Good communication and teamwork skills.
Able to work according to sprint or project timelines.
Open to feedback and code reviews.
Responsible and accountable for assigned tasks.
Committed to maintaining the confidentiality of source code, credentials, customer data, and transaction data.
Preferred Experience
Experience developing Java and Spring Boot-based back-end applications.
Experience developing simple REST APIs.
Experience working with PostgreSQL, MySQL, or Oracle databases.
Experience using Git in a software development environment.
Experience in fintech, digital payments, e-commerce, PPOB, banking, telecommunications, or API integration projects is an advantage.
Experience using Postman or Swagger for API testing.
Minimum Requirements
Diploma or Bachelor’s degree in Information Technology, Information Systems, Computer Science, Software Engineering, or a related field.
Minimum of 2 year of experience as a Java Back-End Developer.
Basic understanding of Java and Spring Boot.
Understanding of REST APIs and JSON.
Basic SQL knowledge.
Familiarity with Git.
Ability to work effectively in a team and follow technical instructions.