Java Developer (Middle/Senior)

MANTU INTERNATIONAL PTE LTD; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Amaris Consulting, part of Mantu, is hiring a skilled fullstack engineer to design, develop, test, and maintain production-grade applications. You will work with Java, Spring Boot, and modern frontend tech (React/Angular/Vue) to deliver integrated enterprise solutions deployed on Apache Tomcat.

You will collaborate with Business Analysts, QA, Project Managers, and Infrastructure teams across the SDLC, ensuring robust, scalable software and high-quality documentation.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 3–6 years of experience in Software Engineering, Fullstack Development, Java Development, or a similar role.
• Strong programming skills in Java with OO design.
• Hands-on experience with Spring Boot / Spring Framework.

Responsibilities

• Design, develop, test, and maintain production-grade fullstack applications using Java and modern web technologies.
• Develop robust backend services with Java and Spring Boot.
• Design, develop, and integrate RESTful APIs for enterprise apps and systems integration.
• Develop and optimize relational databases, including SQL queries and indexing.
• Build frontend apps with JavaScript, HTML, CSS and frameworks such as React, Angular, or Vue.js.
• Deploy and support apps on Apache Tomcat; troubleshoot and resolve issues.
• Participate in code reviews, testing, debugging, deployment, and continuous improvement.

Skills

Java

Spring Boot

RESTful APIs

Relational databases

SQL

JavaScript

HTML

CSS

React

Angular

Vue.js

Apache Tomcat

IntelliJ IDEA

Git

SDLC

Debugging

Collaboration

Education

Bachelor's degree in Computer Science, Software Engineering, Information Technology

Tools

IntelliJ IDEA

Git

Apache Tomcat

Job description

Job description

ABOUT THE JOB

• Design, develop, test, and maintain production-grade fullstack applications using Java and modern web technologies.
• Develop robust and scalable backend services using Java and Spring Boot.
• Design, develop, and integrate RESTful APIs for enterprise applications and system integration.
• Design and optimize relational databases, including SQL queries, table relationships, indexing, and data structures.
• Develop and maintain frontend applications using JavaScript, HTML, CSS, and modern frameworks such as React, Angular, or Vue.js.
• Integrate frontend applications with backend services, APIs, databases, and enterprise systems.
• Deploy, configure, and support applications running on Apache Tomcat.
• Troubleshoot application issues, perform root-cause analysis, and implement effective technical solutions.
• Participate in code reviews, testing, debugging, deployment, and continuous improvement activities.
• Work closely with Business Analysts, QA, Project Managers, Infrastructure teams, and other developers throughout the SDLC.
• Use Git and established development practices to maintain code quality, version control, and collaboration.
• Take ownership of technical delivery from development through deployment and production support.
• Contribute to technical documentation, development standards, and knowledge sharing within the team.

ABOUT YOU

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 3–6 years of experience in Software Engineering, Fullstack Development, Java Development, or a similar role.
• Strong programming skills in Java, with solid understanding of object-oriented programming.
• Strong hands‑on experience with Spring Boot / Spring Framework.
• Strong understanding of relational database design, including SQL, table relationships, indexing, and query optimization.
• Proven experience designing, developing, and consuming RESTful APIs.
• Practical experience with frontend technologies including JavaScript, HTML, and CSS.
• Experience with at least one modern frontend framework such as React, Angular, or Vue.js.
• Experience deploying and supporting applications on Apache Tomcat.
• Proficiency with IntelliJ IDEA or a similar Java development environment.
• Strong knowledge of Git / version control systems.
• Good understanding of software development lifecycle, testing, debugging, and deployment processes.
• Strong analytical and problem-solving skills.
• Ability to work independently and take ownership of technical deliverables.
• Strong communication and collaboration skills with both technical and business stakeholders.

WHY AMARIS?

At Amaris Consulting, we believe in creating a thriving, positive workplace where every team member can grow, connect, and make a real impact. Here’s what you can expect when you join our dynamic community:

• Global Diversity: Be part of an international team of 110+ nationalities, celebrating diverse perspectives and collaboration.
• Trust and Growth: With 70% of our leaders starting at entry-level, we’re committed to nurturing talent and empowering you to reach new heights.
• Continuous Learning: Unlock your full potential with our internal Academy and over 250 training modules designed for your professional growth.
• Vibrant Culture: Enjoy a workplace where energy, fun, and camaraderie come together through regular afterworks, team-building events, and more.
• Meaningful Impact: Join us in making a difference through our CSR initiatives, including the WeCare Together program, and be part of something bigger.

Equal opportunity

Amaris Consulting is proud to be an equal opportunity workplace. We are committed to promoting diversity within the workforce and creating an inclusive working environment. For this purpose, we welcome applications from all qualified candidates regardless of gender, sexual orientation, race, ethnicity, beliefs, age, marital status, disability or other characteristics.

#LI-SB2

Who are we?

Amaris Consulting, part of Mantu is an independent technology consulting firm providing guidance and solutions to businesses. With more than 1,000 clients across the globe, we have been rolling out solutions in major projects for over a decade – this is made possible by an international team of 7,600 people spread across 5 continents and more than 60 countries. Our solutions focus on four different Business Lines: Information System & Digital, Telecom, Life Sciences and Engineering. We’re focused on building and nurturing a top talent community where all our team members can achieve their full potential. Amaris is your steppingstone to cross rivers of change, meet challenges and achieve all your projects with success.

At Amaris, we strive to provide our candidates with the best possible recruitment experience. We like to get to know our candidates, challenge them, and be able to give them proper feedback as quickly as possible. Here's what our recruitment process looks like:

Brief Call: Our process typically begins with a brief virtual/phone conversation to get to know you! The objective? Learn about you, understand your motivations, and make sure we have the right job for you!

Interviews (the average number of interviews is 3 - the number may vary depending on the level of seniority required for the position). During the interviews, you will meet people from our team: your line manager of course, but also other people related to your future role. We will talk in depth about you, your experience, and skills, but also about the position and what will be expected of you. Of course, you will also get to know Amaris: our culture, our roots, our teams, and your career opportunities!

Case study: Depending on the position, we may ask you to take a test. This could be a role play, a technical assessment, a problem-solving scenario, etc.

As you know, every person is different and so is every role in a company. That is why we have to adapt accordingly, and the process may differ slightly at times. However, please know that we always put ourselves in the candidate's shoes to ensure they have the best possible experience.
We look forward to meeting you!