We are currently seeking a talented Senior Java Engineer to join our dynamic team for an End-to-End Encryption (E2EE) Messaging product. The ideal candidate should have a strong background in backend development, with expertise in building scalable, high-performance applications using Java. As a Senior Java Engineer, you will play a key role in designing, implementing, and maintaining backend systems that power our products and services. You will collaborate closely with cross-functional teams to understand requirements, architect solutions to ensure the product qualities and delivery goals.

• Design, develop, and maintain robust, scalable, and high-performance backend systems and APIs using Java.
• Collaborate with frontend developers, product managers, and other stakeholders to understand requirements and translate them into technical solutions.
• Architect efficient and reusable backend components that can be leveraged across different projects and teams.
• Write clean, maintainable, and well-documented code following best practices and coding standards in Java.
• Optimize backend systems for maximum speed and scalability, ensuring high availability and reliability.
• Implement security best practices to protect sensitive data and prevent security vulnerabilities.
• Conduct code reviews, provide feedback, and mentor junior developers to ensure code quality and foster learning.
• Troubleshoot and debug backend issues, identify bottlenecks, and propose solutions to optimize performance.
• Collaborate with DevOps and infrastructure teams to deploy and manage backend services in production environments.
• Contribute to the establishment and maintenance of best software development practices to ensure the quality and performance of the product.
• Work with the engineering team to explore and create new designs/architectures geared toward scalability, stability and performance of the product.
• Document processes, procedures, and configurations to facilitate knowledge sharing and ensure consistency.
• Stay up-to-date with backend technologies, trends, and best practices,and evaluate their potential impact on our systems and processes.

• Proven experience as a Senior Java Engineer, with minimum 5 years of experience in designing and building high-traffic backend systems using Java.
• Strong proficiency in Java and its ecosystem (e.g. SpringBoot).
• Solid understanding of database technologies such as PostgreSQL, MySQL, MongoDB, Redis databases.
• Experience in designing and building RESTful APIs and microservices architectures.
• Experience with message queue systems such as Amazon SQS, Amazon SNS, Kafka, RabbitMQ.
• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud Platform.
• Knowledge of containerization and orchestration tools such as Docker and Kubernetes.
• Understanding of Agile software development methodologies such as Scrum.
• Strong problem-solving skills and the ability to troubleshoot complex technical issues.
• Excellent communication and collaboration skills, with the ability to work effectively in a team environment.
• Experience with End-to-End Encryption (E2EE) is a plus.
• Understanding of DevOps practices, including continuous integration and deployment (CI/CD), containerization (e.g., Docker), and orchestration tools (e.g., Kubernetes).
• Good knowledge of secure coding practices.
• Excellent at teamwork and communication, great attention to detail.

What we offer

• Annual leave 13-15 days per year
• Health Insurances, social insurance
• 13th-month salary
• Performance and salary review: once per year
• Internal training/sharing and professional Training courses
• Monthly Team building & Happy hour
• Company trip, year-end party, .....
• Devices: Macbook M3 and screen (If needed)
• Free tea, coffee & snack
• Comfortable working Area
• Working hours: 9 am-6 pm from Monday to Friday

Our hiring process

Our recruitment process differs depending on specific positions and/or products. However, it typically includes the following main stages:

1. Technical challenge assessment

2. Technical and relevant work experience interview

3. Culture fit interview

4. Offer