Total 77 java developer job vacancies in Engineering category

Key Responsibilities

• Develop and maintain scalable web applications and backend services using Java and JavaScript-based technologies.
• Build RESTful APIs and microservices using Spring Boot and Node.js.
• Design responsive user interfaces using React.js and TypeScript.
• Work with SQL and NoSQL databases such as PostgreSQL, MongoDB, and ElasticSearch.
• Collaborate in an Agile development environment with cross-functional teams including DevOps, QA, and Product.
• Implement CI/CD pipelines and participate in DevOps practices using Docker and related tools.
• Ensure software quality through unit testing, code reviews, and automated testing.
• Troubleshoot issues and optimize application performance.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Strong proficiency in Java and JavaScript, with experience in Spring Boot, Node.js, and React.js.
• Proficient in TypeScript, MongoDB, and SQL/NoSQL databases.
• Familiarity with Docker, ElasticSearch, and DevOps concepts.
• Experience working in an Agile/Scrum environment.
• Good understanding of system design, APIs, and microservices architecture.
• Strong analytical and problem-solving skills.

Work Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

Key Responsibilities

• Develop and maintain scalable web applications and backend services using Java and JavaScript-based technologies.
• Build RESTful APIs and microservices using Spring Boot and Node.js.
• Design responsive user interfaces using React.js and TypeScript.
• Work with SQL and NoSQL databases such as PostgreSQL, MongoDB, and ElasticSearch.
• Collaborate in an Agile development environment with cross-functional teams including DevOps, QA, and Product.
• Implement CI/CD pipelines and participate in DevOps practices using Docker and related tools.
• Ensure software quality through unit testing, code reviews, and automated testing.
• Troubleshoot issues and optimize application performance.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Strong proficiency in Java and JavaScript, with experience in Spring Boot, Node.js, and React.js.
• Proficient in TypeScript, MongoDB, and SQL/NoSQL databases.
• Familiarity with Docker, ElasticSearch, and DevOps concepts.
• Experience working in an Agile/Scrum environment.
• Good understanding of system design, APIs, and microservices architecture.
• Strong analytical and problem-solving skills.

Preferred Qualifications

• Experience with cloud platforms (e.g., AWS, Azure, GCP).
• Familiarity with CI/CD tools and infrastructure as code.
• Knowledge of security best practices and performance tuning.

Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

Responsibilities

• Lead migration and conversion of on-premises / cloud databases (MSSQL, Oracle) to PostgreSQL on cloud-managed database services

• Design, develop, and optimize SQL queries, stored procedures, triggers, and functions in at least one of: MSSQL, Oracle, or PostgreSQL

• Collaborate with application teams to ensure seamless integration, data integrity, and minimal downtime during migrations

• Ensure database code meets performance, security, and coding standards

• Diagnose and resolve performance bottlenecks (query plans, indexing, I/O, memory utilization)

• Implement indexing strategies, partitioning, and query optimization techniques tailored to MSSQL, Oracle, or PostgreSQL on cloud-managed platforms

• Monitor and fine-tune performance post-migration using native cloud tools

• Configure and manage cloud-managed database services across AWS and Azure for MSSQL, Oracle, and PostgreSQL workloads

• Implement backup, recovery, and disaster recovery strategies aligned to RPO/RTO objectives

• Design and support high availability and scalability patterns

• Enforce security (encryption, IAM roles, least privilege) and governance best practices

• Maintain migration runbooks, schema mappings, and conversion logic

• Produce reports on migration progress, performance metrics, and cost optimization

• Communicate updates and risks clearly to stakeholders

• Implement database security policies and access controls

• Stay current with security threats and apply patches/updates as needed

Requirements

• Bachelor’s degree in computer science or a related field with 8–10 years of experience in database development and migration for MSSQL, Oracle, and PostgreSQL

• Must have hands-on experience as a database developer with strong skills in SQL programming

• Proficiency in SQL, T-SQL, PL/SQL, and scripting languages

• Strong understanding of database design principles

• Experience with database performance tuning and optimization

• Knowledge of database security and compliance requirements

• Exposure to database administration tasks on MSSQL, Oracle, or PostgreSQL is preferable

• Excellent problem-solving and troubleshooting skills

• Ability to work independently and collaboratively in a team

• Effective communication and documentation skills

• Proven experience in database conversion from MSSQL and Oracle to PostgreSQL in cloud environments

• Strong knowledge of database architecture, design principles, and performance tuning

• Hands-on experience with cloud-managed database services (AWS RDS/Aurora, Azure SQL Database, Azure Database for PostgreSQL)

• Experience with data migration and movement tools, including on-premises database tools (e.g., Backup utilities, Data Pump) and cloud services (e.g., AWS DMS, AWS Glue, AWS Athena)

• Familiarity with DevOps tools and automation for database deployments (PowerShell, Git, CI/CD pipelines)

• Understanding of cloud infrastructure components (networking, load balancers, virtualization) and commercial cloud platforms (AWS, Azure)

• Experience supporting high-availability production systems in cloud environments is advantageous

• Software development experience in any programming language is a plus

• Strong analytical and critical thinking skills with a service excellence attitude

• Ability to work independently and collaboratively with Senior Application DBAs and application teams

• Excellent verbal and written communication skills for interaction with technical and business stakeholders

• Certifications in MSSQL, Oracle and PostgreSQL database developer

• Experience with cloud-based database services (e.g., AWS RDS, Azure Database)

• Experience on database migration and replication technologies

Licence no: 12C6060

Backend Software Engineer will implement backend systems, such as microservices, interface application and APIs. The candidate will contribute to building scalable, high-performance applications. The ideal candidate will have strong experience with Java, SpringBoot, and backend development principles, as well as the ability to collaborate effectively in an agile environment.

Responsibilities:

• Develop, maintain and enhance software application system with functional requirements.
• Follow coding standards, maintain high code quality, and write unit and integration tests.
• Perform software integration test and support system integration test.
• Perform trouble shooting and production support.
• Ability to learn and adapt to new technologies, learn new concepts.
• Ability to work independently and as part of a team.
• Good verbal and communication skills.

Requirements:

• Diploma or Bachelor’s or Master’s degree in Information System, Computer Science, Software Engineering, or a related field.
• Degree in Computer Science / Information Technology / Software Engineering, or equivalent.
• Fresh graduates from reputable universities are welcome
• Experience in software development using Java/J2EE, Spring, Spring Boot, Microservices, Hibernate, JPA, REST, JSON
• Familiar with Microservice architecture
• Experience in REST web service development using Spring Boot
• Experience in using Kafka, IBM MQ, Rabbit MQ
• Experience in relational databases like Oracle and MS SQL
• Knowledge of Linux/Unix environments and basic commands.
• Must have understanding on tools like Jenkins, Git/Stash, Bitbucket, JIRA, Maven, SonarQube.
• Experience with Agile/Scrum methodologies and tools (e.g., Jira, GitLab, Jenkins).
• Familiar with Software Unit Testing (JUnit)
• Good verbal and communication skills.

Job Description:

1. Responsible for implementing and maintaining new platform features.
2. Responsible for service design, architecture design, and performance optimization of the platform.
3. Maintain, optimize, and fix existing business services.
4. Maintain comprehensive knowledge documentation.

Work Experience: 3+ years
Education: Bachelor’s degree or above
Preferred Majors: Information Management, Business Administration,Information Engineering

Proficient Tools:

• Java, Spring, MySQL

Other Requirements:

1. 3+ years of experience in internet development, with practical experience in product architecture design.
2. Proficient in Java 8 (Stream API, Date), familiar with Redis, MQ, and Spring Boot, including its runtime mechanism.
3. Experience in microservice development.
4. Skilled in MySQL database design, development, and performance optimization.
5. Familiar with the design and implementation of large-scale distributed systems.
6. Proactive, able to work independently as well as integrate effectively within a team.
7. Strong sense of responsibility, good self-learning ability, and excellent communication skills.
8. Experience with blockchain technology is a plus.
9. Understand and follow coding standards and best practices.

Job Description:

1. Responsible for implementing and maintaining new platform features.
2. Responsible for service design, architecture design, and performance optimization of the platform.
3. Maintain, optimize, and fix existing business services.
4. Maintain comprehensive knowledge documentation.

Work Experience: 3+ years
Education: Bachelor’s degree or above
Preferred Majors: Information Management, Business Administration,Information Engineering

Proficient Tools:

• Java, Spring, MySQL

Other Requirements:

1. 3+ years of experience in internet development, with practical experience in product architecture design.
2. Proficient in Java 8 (Stream API, Date), familiar with Redis, MQ, and Spring Boot, including its runtime mechanism.
3. Experience in microservice development.
4. Skilled in MySQL database design, development, and performance optimization.
5. Familiar with the design and implementation of large-scale distributed systems.
6. Proactive, able to work independently as well as integrate effectively within a team.
7. Strong sense of responsibility, good self-learning ability, and excellent communication skills.
8. Experience with blockchain technology is a plus.
9. Understand and follow coding standards and best practices.

Responsibilities:

• Design and evaluate scalable, secure, and fault-tolerant systems, incorporating multi-region disaster recovery and ensuring robust data consistency.
• Offer domain expertise and guidance across teams, facilitating cross-functional architectural discussions.
• Convert complex business requirements into scalable technical solutions that align with long-term product and company objectives.
• Develop high-quality, reusable components and establish best practices to enhance efficiency across teams.
• Establish and implement domain-level standards, governance frameworks, and process improvements, including microservice design, observability, and code quality.
• Mentor engineers, promote knowledge sharing, and foster a culture of continuous learning and innovation.

Qualifications:

• Holds a Bachelor's degree in Computing, Software Engineering, IT, or a related field.
• Over 8 years of experience in backend system design and development, with a proven record of delivering mission-critical systems.
• Strong expertise in Java or Go, with in-depth knowledge of backend frameworks (e.g., Spring Boot, WebFlux), messaging systems (e.g., Kafka), and distributed databases (SQL/NoSQL, Redis, etc.).
• Skilled in designing and scaling large distributed systems with a focus on performance, availability, security, and resilience.
• Capable of defining and implementing engineering standards and technical guidelines at the system or domain level.
• Continuously evaluates and integrates new technologies to enhance systems and processes.
• Anticipates edge cases and long-term impacts, incorporating robustness, observability, and compliance from the design stage.
• Effectively drives adoption of best practices and standards across teams and stakeholders.
• Makes informed, strategic decisions backed by technical expertise and business impact analysis.

We regret only shortlisted candidates will be contacted. All applications will be handled confidentially. By submitting your application, you agree to the collection, use, retention, and disclosure of your personal information to prospective employers.

Wecruit Pte Ltd

EA License No: 20C0270

EA Personnel: Nyon Hock Sen (Aden)

EA Personnel Reg No: R24124070

Location: Alexandra Road

Working hours: Mon-Fri, Office hours

Key Responsibilities

• Maintain and enhance enterprise Java applications, including change requests,bug fixes, performance optimisation, and system stability improvements.
• Provide production support, incident management, and root cause analysis (RCA).
• Conduct impact assessments for system changes and ensure minimal disruption to live environments.
• Implement security fixes from code reviews, vulnerability assessments, and penetration testing.
• Support system monitoring, backups, disaster recovery, and contribute to modernisation initiatives.

Requirements

• Degree in Computer Science / IT / Engineering or equivalent experience.
• Min. 4 years of experience supporting and maintaining enterprise systems.
• Strong troubleshooting skills and experience working in production environments.
• Hands-on experience with React, Java (preferably Java 8), Spring Framework, and Oracle WebLogic.
• Experience with Oracle/Sybase databases and legacy Java web technologies (JSP,JSTL, Struts/JSF, jQuery).
• Familiarity with Linux/Unix environments, version control (Git/SVN), andauthentication integrations (LDAP/AD/SiteMinder).

By submitting your resume, you consent to the collection, use, and disclosure of your personal information per ScienTec’s Privacy Policy (scientecconsulting.com/privacy-policy).

This authorizes us to:

• Contact you about potential opportunities.

• Delete personal data as it is not required at this application stage.

All applications will be processed with strict confidence. Only shortlisted candidates will be contacted.

Elaine Wong (Zoe) l Outsourcing Team

ScienTec Consulting Pte Ltd - 11C5781

Key Responsibilities

• Develop and maintain scalable web applications and backend services using Java and JavaScript-based technologies.
• Build RESTful APIs and microservices using Spring Boot and Node.js.
• Design responsive user interfaces using React.js and TypeScript.
• Work with SQL and NoSQL databases such as PostgreSQL, MongoDB, and ElasticSearch.
• Collaborate in an Agile development environment with cross-functional teams including DevOps, QA, and Product.
• Implement CI/CD pipelines and participate in DevOps practices using Docker and related tools.
• Ensure software quality through unit testing, code reviews, and automated testing.
• Troubleshoot issues and optimize application performance.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Strong proficiency in Java and JavaScript, with experience in Spring Boot, Node.js, and React.js.
• Proficient in TypeScript, MongoDB, and SQL/NoSQL databases.
• Familiarity with Docker, ElasticSearch, and DevOps concepts.
• Experience working in an Agile/Scrum environment.
• Good understanding of system design, APIs, and microservices architecture.
• Strong analytical and problem-solving skills.

Preferred Qualifications

• Experience with cloud platforms (e.g., AWS, Azure, GCP).
• Familiarity with CI/CD tools and infrastructure as code.
• Knowledge of security best practices and performance tuning.

Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

About the role:

We are seeking for a Full Stack Engineer that is responsible for maintaining and supporting existing web and enterprise systems while driving gradual modernization, ensuring system stability, security, and performance through effective incident management, system enhancements, and close collaboration with operations and stakeholders.

Working Hours: Mon-Fri, Office hours
Working Location: Central
Salary package: UP to $9,500 (basic) + AWS
Job Type: Contract

Responsibilities:

• Take ownership of system maintenance, including change requests, bug fixes, performance optimisation, and system stability improvements.
• Maintain and enhance existing web applications, including carrying out thorough impact assessment for any change requests.
• Support production systems, including incident response and root cause analysis.
• Work with operations teams to ensure system monitoring, backup procedures, and disaster recovery capabilities.
• Ensure system security through implementing fixes from security vulnerabilities identified during source code review, open source analysis, vulnerability assessment, penetration testing and other security tests.
• Document existing systems and create knowledge transfer materials for legacy codebases.
• Analyze existing system dependencies and requirements to plan and implement modernization roadmaps.

Requirements:

• Degree in IT/Engineering or equivalent with 3–5 years of experience in enterprise system development, maintenance, and support
• Proficient in Java (including legacy versions), React.js, Spring Boot, WebLogic, and Oracle/Sybase databases
• Strong troubleshooting skills with good understanding of production impact, change management, and version control (Git/SVN)
• Experience with web technologies (JSP, jQuery, Struts/JSF), authentication (LDAP/AD), batch processing, and basic Linux/Unix
• Exposure to system integration, APIs, microservices, containerization, cloud, and modern frameworks (e.g. React)
• Good understanding of security best practices, code review, and vulnerability management

Bonus (Added Advantage):

• Experience in government or highly regulated environments
• Involvement in system modernization or redevelopment projects
• Exposure to event-driven solutions (e.g. Solace)
• Experience with Azure DevOps (Azure Boards, Pipelines)

By submitting your resume, you consent to the collection, use, and disclosure of your personal information per ScienTec’s Privacy Policy (scientecconsulting.com/privacy-policy).

This authorizes us to:
• Contact you about potential opportunities.
• Delete personal data as it is not required at this application stage.

All applications will be processed with strict confidence. Only shortlisted candidates will be contacted.

Ting Soo Leng (Tiffany) l Outsourcing Team
ScienTec Consulting Pte Ltd - 11C5781

• Experience that will demonstrate proficiency and ease with one or more programming languages, quality assurance, scripting languages and operating systems.
• Solid hands-on development experience in backend technologies including JAVA, J2EE, SQL and related technology stack, preferably incorporating opensource libraries.
• Hands-on experience to Spring Framework, Spring Boot, MongoDB and JPA /Hibernate is a strong plus.
• Exposure to frameworks like Karate and TestNG is good to have to carry out QA tasks. Some knowledge of test automation frameworks is also a strong plus.
• Strong foundation expected in data structures, algorithms, problem solving and complexity analysis.
• Strong designing, analytical, programming & communication skills needed, along with aptitude for building stable solutions.
• Some demonstrated experience with n-tier web application development and experience in latest JDK is desired. Java / J2EE certification is a Plus. Experience with web services standards and related technologies (XML, JSON, REST, SOAP, WS*, AXIS, JERSEY) is nice to have.
• Demonstrable experience utilizing object-oriented patterns and design best practices is a strong plus.
• Exposure to tools like Postman / any REST Client is desired. LINUX skills are required.
• Exposure to frameworks like Karate and TestNG is good to have to carry out QA tasks. Some knowledge of test automation frameworks is also a strong plus.

Key Responsibilities

• Develop and maintain scalable web applications and backend services using Java and JavaScript-based technologies.
• Build RESTful APIs and microservices using Spring Boot and Node.js.
• Design responsive user interfaces using React.js and TypeScript.
• Work with SQL and NoSQL databases such as PostgreSQL, MongoDB, and ElasticSearch.
• Collaborate in an Agile development environment with cross-functional teams including DevOps, QA, and Product.
• Implement CI/CD pipelines and participate in DevOps practices using Docker and related tools.
• Ensure software quality through unit testing, code reviews, and automated testing.
• Troubleshoot issues and optimize application performance.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Strong proficiency in Java and JavaScript, with experience in Spring Boot, Node.js, and React.js.
• Proficient in TypeScript, MongoDB, and SQL/NoSQL databases.
• Familiarity with Docker, ElasticSearch, and DevOps concepts.
• Experience working in an Agile/Scrum environment.
• Good understanding of system design, APIs, and microservices architecture.
• Strong analytical and problem-solving skills.

Preferred Qualifications

• Experience with cloud platforms (e.g., AWS, Azure, GCP).
• Familiarity with CI/CD tools and infrastructure as code.
• Knowledge of security best practices and performance tuning.

Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

Company Overview

SEMI Integration is an international systems integration firm with offices in Singapore, China, and Malaysia. Founded in 1999, it delivers world-class manufacturing solutions and integration services, focusing on semiconductor and high-tech industries including rail-transit, healthcare, and new-energy sectors.

Job Summary

You will design, develop, and maintain backend enterprise software and AI/ML-powered services, collaborating with clients and AI teams to deploy intelligent applications and support long-term project implementation on-site.

Responsibilities

• Analyze software product requirements and design technical architecture in collaboration with client vendors
• Develop backend components for enterprise software products and platform services using Java technologies
• Manage development processes including testing, deployment, and production maintenance to ensure software reliability
• Provide on-site project implementation and long-term development support at client locations
• Design, develop, and integrate AI/ML-powered backend services such as LLM applications, intelligent agents, knowledge base services, and API orchestration layers
• Build and maintain data pipelines, integrate vector databases, and develop model-serving APIs for AI-driven applications
• Collaborate with AI and data teams to deploy machine learning models and GenAI services into production environments

Preferred competencies and qualifications

• Bachelor’s degree or above in Computer Science, Software Engineering, AI, Data Science, or related fields with 3+ years of Java backend development experience
• Strong computer science fundamentals with expertise in Java, object-oriented development, common design patterns, and JVM principles
• Proficient in Java frameworks including Spring, Spring Boot, MyBatis, and JPA; familiar with databases such as MySQL, Oracle, and SQL Server
• Familiar with application servers like Tomcat and JBoss, Linux environments, and command-line operations
• Hands-on experience with AI/ML integration, including RESTful integration with LLM APIs (OpenAI, Azure OpenAI, Anthropic, or open-source models)
• Knowledge of RAG architecture, vector databases (Pinecone, Milvus, Weaviate, pgvector), prompt engineering, agent workflow orchestration, and model inference services
• Experience with microservices architecture, API gateways, and message queues such as Kafka or RabbitMQ
• Experience in cloud deployment and containerization tools like Docker and Kubernetes
• Prior experience in industrial software systems, MES, semiconductor manufacturing, or smart factory systems
• Strong communication skills, teamwork, ownership mindset, and ability to learn quickly

Key Responsibilities

• Design and develop RESTful APIs using Java and Spring Boot

• Maintain and enhance existing backend modules

• Optimize SQL queries and database performance

• Implement authentication and authorization mechanisms

• Participate in code reviews and mentor junior developers

• Troubleshoot application-level issues in staging and production

Requirements

• 5+ years of Java backend development experience

• Strong knowledge of Spring Boot, Hibernate, and REST APIs

• Experience with MySQL/PostgreSQL

• Familiarity with Docker and CI/CD pipelines

• Good understanding of application security practices

Responsibilities:

• Design and evaluate scalable, secure, and fault-tolerant systems, incorporating multi-region disaster recovery and ensuring robust data consistency.
• Offer domain expertise and guidance across teams, facilitating cross-functional architectural discussions.
• Convert complex business requirements into scalable technical solutions that align with long-term product and company objectives.
• Develop high-quality, reusable components and establish best practices to enhance efficiency across teams.
• Establish and implement domain-level standards, governance frameworks, and process improvements, including microservice design, observability, and code quality.
• Mentor engineers, promote knowledge sharing, and foster a culture of continuous learning and innovation.

Qualifications:

• Holds a Bachelor's degree in Computing, Software Engineering, IT, or a related field.
• Over 8 years of experience in backend system design and development, with a proven record of delivering mission-critical systems.
• Strong expertise in Java or Go, with in-depth knowledge of backend frameworks (e.g., Spring Boot, WebFlux), messaging systems (e.g., Kafka), and distributed databases (SQL/NoSQL, Redis, etc.).
• Skilled in designing and scaling large distributed systems with a focus on performance, availability, security, and resilience.
• Capable of defining and implementing engineering standards and technical guidelines at the system or domain level.
• Continuously evaluates and integrates new technologies to enhance systems and processes.
• Anticipates edge cases and long-term impacts, incorporating robustness, observability, and compliance from the design stage.
• Effectively drives adoption of best practices and standards across teams and stakeholders.
• Makes informed, strategic decisions backed by technical expertise and business impact analysis.

We regret only shortlisted candidates will be contacted. All applications will be handled confidentially. By submitting your application, you agree to the collection, use, retention, and disclosure of your personal information to prospective employers.

Wecruit Pte Ltd

EA License No: 20C0270

EA Personnel: Nyon Hock Sen (Aden)

EA Personnel Reg No: R24124070