Total 13 java developer job vacancies in D12 Toa Payoh, Balestier, Serangoon

We are seeking a skilled and passionate Java Developer to join our dynamic technology team. The successful candidate will be responsible for designing, developing, and maintaining high-quality Java applications. You will collaborate with cross-functional teams to deliver scalable and robust solutions that meet business requirements.

Key Responsibilities

·       Design, implement, and maintain Java-based applications according to project requirements.

·       Collaborate with business analysts, product managers, and other developers to understand end-user requirements and deliver technical solutions.

·       Write clean, efficient, and well-documented code following industry best practices.

·       Troubleshoot, debug, and resolve software defects and issues in a timely manner.

·       Participate in code reviews to ensure code quality and knowledge sharing among team members.

·       Contribute to the continuous improvement of development processes and methodologies.

·       Keep up to date with the latest Java technologies and industry trends.

Required Skills and Qualifications

·       Bachelor’s degree in Computer Science, Information Technology, or a related field.

·       Proven experience as a Java Developer or similar role.

·       Strong proficiency in Java SE/EE, Spring Framework, and related technologies.

·       Familiarity with RESTful APIs, web services, and microservices architecture.

·       Experience with databases such as MySQL, PostgreSQL, or Oracle.

·       Knowledge of version control systems (e.g.,Git).

·       Solid understanding of object-oriented programming principles.

·       Excellent problem-solving and analytical skills.

·       Strong communication and teamwork abilities.

Preferred Qualifications

·       Experience with cloud platforms (e.g., AWS, Azure, Google Cloud).

·       Proficient in Python programming in application development environments.

·       Familiarity with front-end technologies (e.g., JavaScript, Angular, React) is a plus.

·       Understanding of Agile/Scrum development methodologies.

·       Relevant Java certifications are advantageous.

What You Will Do

• Write Code: Build and update backend systems using Java and Spring Boot.

• Fix Problems: Find and fix bugs to keep services running smoothly.

• Teamwork: Work with other developers and designers in an Agile team.

• Keep Data Safe: Follow security rules to make sure citizen information is protected.

• Connect Systems: Create APIs to help different government apps talk to each other.

Skills Needed

• Java: Good experience with Java (Version 11 or higher).

• Spring Boot: Ability to build web applications using the Spring framework.

• Databases: Experience with SQL (like MySQL or PostgreSQL).

• Basic Tools: Familiar with Git (for code saving) and Jenkins (for deployment).

• Testing: Knowing how to write simple tests for your own code.

Responsibilities
You will be responsible for supporting in-house Developer Portal, Dashboard Application & Backstage by working closely with the Engineering and Architecture team to codify architectural best practices to automate key development practices & with run team to troubleshoot & resolve issues including Production Deployment. This Includes microservices framework, API marketplace and low code environments.

• Work as part of a highly talented, cross-functional Central DevOps team to ensure that modern technologies and processes are understood and practiced.
• Stay current with industry trends and development of key DevOps, Runtime, and Operational innovation platforms.

Requirements

• At least 10 years of relevant experience in JAVA/J2EE Technologies.
• Strong experience of developing systems with SpringBoot, JPA, Hibernate and Microservices.
• Must have hands-on experience with javaScript, ReactJS, NodeJs ,HTML and CSS
• Strong experience in Groovy and shell scripting
• Must have database scripting knowledge in MS-SQL & postgreSQL
• Good understanding and hands on experience on scripting.
• Scripting includes Groovy, Ansible, Phyton, Shell, Cron
• MUST have automation thru server-side Unix/Linux shell scripting technical knowledge
• MUST have deep hands-on knowledge and experience in DevOps tool chain support and operability
• Has deep technical knowledge on debug, troubleshooting Jenkins groovy scripts, pipelines thru Jenkins, Bitbucket, SonarQube, etc
• Able to code, script, automate full DevOps automation capabilities to enhance and elevate automation from manual human tasks. Always able to find ways to automate, develop scripts, innovate new ideas to reduce human work and repetitive tasks.

Overview

• This role combines hands-on software engineering with legacy modernisation, operational resilience, and digital transformation. 
• You will help maintain and enhance complex mission-critical systems while progressively improving architecture, security, observability, developer practices, and the responsible use of AI to accelerate engineering outcomes. 
• You will be expected to work across both change delivery and production support contexts, balancing system stability, regulatory obligations, and long-term technical renewal.

Responsibilities 

• Develop, enhance and maintain software for STARS and ELS across both legacy and modernised components, ensuring reliability, correctness and maintainability.
• Work on complex business workflows that support land title registration, lodgement, payment, document handling, reporting and search functions.
• Analyse and implement system changes with care in a tightly coupled environment with numerous upstream and downstream interfaces.
• Support modernisation initiatives such as platform upgrades, code remediation, refactoring, API enablement, removal of obsolete components, and progressive architecture improvements.
• Contribute to digital transformation efforts, including improving system usability, automation, straight-through processing and integration with new digital services.
• Use AI tools responsibly to improve engineering productivity in areas such as code analysis, documentation, test design and development acceleration, while critically reviewing all AI-generated outputs for correctness, security, maintainability and compliance.
• Participate in incident investigation, root cause analysis, defect remediation and production support to maintain system stability and service availability.
• Strengthen engineering quality through testing, code review, secure coding, dependency hygiene, observability and DevSecOps practices.
• Collaborate with product owners, users, architects, operations teams, cybersecurity stakeholders and vendors to deliver solutions that are practical, secure and aligned with SLA's priorities.
• Document technical design, system behaviour, integration logic and operational considerations to support knowledge retention and reduce dependency on individuals or vendors.
• In this role, you will be expected to make sound engineering trade-offs in a legacy environment where data integrity, security, auditability and service continuity are critical. 
• You should be comfortable working with large and complex codebases, investigating difficult defects, understanding business rules embedded in older implementations, and helping the team move progressively toward better engineering practices and future-state architecture.

Requirements

• Degree in Computer Science, Software Engineering, Information Systems or a related discipline, or equivalent practical experience.
• At least 3–5 years of relevant experience in software engineering, application maintenance, or enterprise system development.
• Strong programming and debugging skills, with experience in one or more of the following: Java, JSP, JavaScript, SQL, PL/SQL, shell scripting, or related enterprise technologies.
• Experience working with large, complex or legacy application systems, including troubleshooting production issues and understanding tightly coupled business logic.
• Familiarity with web application and enterprise platform concepts such as APIs, application servers, databases, batch processing, authentication flows, and system integrations.
• Experience with software delivery practices such as version control, CI/CD, automated testing, release management and environment management.
• Working knowledge of secure coding principles and application security practices, with appreciation of vulnerability remediation and operational risk management.
• Good analytical thinking and problem-solving ability, with a disciplined approach to change impact assessment and root cause analysis.
• Strong communication and collaboration skills, with the ability to work effectively with technical and non-technical stakeholders.
• Ability to learn quickly, take ownership of assigned work, and contribute in a structured, high-accountability environment.

1. Strong Salesforce experience with exposure to Sales Cloud, Service Cloud

2. Strong in creating Lightning components (Aura knowledge is a must, LWC will be additional advantage)

3. Srong in Apex, Visualforce and LWC

4. Apex Enterprise Patterns Knowledge/Experience

5. Expertise in Configuration elements including Workflows, Validation rules, Process Builder

6. Well versed in any modern IDE (like VS code) and familiar with Git/Bit Bucket

7. Good to have PSS knowledge

Job Overview:
We are seeking a highly skilled Software Developer to join our team in Singapore. The successful candidate will be responsible for researching, designing, and developing software and applications. This role requires strong analytical skills and the ability to develop innovative software solutions that meet user needs and performance requirements.
Key Responsibilities:

• Research, design, and develop computer software and applications to meet business and technical requirements.
• Analyze user needs and translate them into software solutions using computer science, engineering, and mathematical principles.
• Update, enhance, and optimize existing software to improve performance and functionality.
• Develop and direct software testing and validation procedures to ensure quality and security.
• Collaborate to integrate hardware and software systems for seamless operation.
• Define software specifications and performance requirements for new and existing applications.
• Stay updated with emerging technologies to continuously improve software development processes.

Requirements:

• A Bachelor’s degree in Computer Science, Information Technology, Programming & Systems Analysis or Science (Computer Studies)
• Minimum of three (3) years of work experience as a Software Developer.
• Proficiency in programming languages, such as , Java, Python, JavaScript or GoLang
• Experience in Agile or other software development methodologies
• Strong knowledge of software architecture, database systems, and cloud technologies.
• Ability to develop scalable and efficient software solutions.
• Strong problem-solving and analytical skills.
• Excellent communication skills in English (both written and verbal).

Why Join Us?

• Competitive salary & benefits package
• Career growth & professional development in a fast-paced tech environment.
• Collaborative and innovative work culture with exposure to the latest technologies

Role Summary & Key Responsibilities

We are looking for a seasoned Lead React Native Developer to take full ownership of BRT's mobile engineering function. This is a leadership-plus-hands-on role with three interconnected mandates.

1. New iBMS Mobile Products: Architect and develop new React Native iOS and Android applications for the full suite of iBMS products — from initial discovery and UI/UX collaboration through to App Store and Play Store submission and post-release operations.
2. Legacy App Migration: Lead the systematic conversion of BRT's existing native iOS (Swift/Objective-C) and Android (Kotlin/Java) applications to a unified React Native codebase, preserving feature parity, design fidelity, and platform-specific user experience expectations.
3. Team Enablement &Mentorship: Mentor and upskill a team of native iOS and Android developers, guiding their professional transition to React Native development through structured learning pathways, pair programming, code reviews, and internal knowledge-sharing sessions.

Required Qualifications & Experience

• Minimum 6 years of mobile development experience, with at least 4 years dedicated to React Native in production environments. Minimum 2 years of formal team lead or staff engineer experience with direct mentoring responsibility for mid-senior engineers.
• Demonstrable experience leading a team through a significant technology transition (platform migration, framework adoption, or language re-platforming).
• Expert-level proficiency in TypeScript; strong understanding of JavaScript runtime behaviour, event loop, and async patterns.
• Deep knowledge of React Native internals, proven experience with state management, mastery of React Navigation and complex nested navigation architectures.
• Proficiency with react-native-cli, managed and bare workflows; ability to evaluate trade-offs and choose appropriately per project.
• Solid understanding of native iOS development (Swift, Objective-C, UIKit, SwiftUI) sufficient to author and debug React Native native modules and bridges.
• Solid understanding of native Android development (Kotlin, Java, Jetpack) sufficient to author and debug React Native native modules and bridges.
• Ability to read and navigate existing native codebases for accurate migration planning and risk assessment.
• Demonstrated track record of publishing multiple mobile applications to the Apple App Store and Google Play Store — Include links or names of published apps in your application.
• Experience writing and maintaining Jest unit tests, React Native Testing Library integration tests, and Detox E2E tests.
• Strong written and verbal communication skills in English; ability to produce clear technical documentation, ADRs, and onboarding guides.
• Familiarity with building management, facility management, or smart building domain applications is a plus. Prior experience in a SaaS product company, especially multi-tenant mobile application contexts is also a plus.

Core Competencies

Technical Strengths

• Cross-platform architectural thinking
• Performance-first development mindset
• Strong debugging and root-cause analysis skills
• Security-aware: token storage, certificate pinning, data encryption at rest
• Systematic approach to code quality and testing
• Up-to-date with React Native New Architecture evolution

Leadership & People

• Patient and structured mentoring style
• Leads by example — maintains hands-on coding contributions
• Clear communicator across engineering, product, and design
• Creates psychological safety for junior developers to learn and fail fast
• Drives accountability through enablement, not micromanagement
• Gives and receives constructive feedback effectively

What We Offer

• A high-impact, highly visible role: you will lead BRT's mobile engineering transition to React Native.
• Greenfield opportunity: the majority of iBMS mobile applications are new products — you shape architecture and user experience from day one.
• A meaningful mentorship mission: lead a talented native development team through a well-supported transition, not a rushed rewrite.
• Direct collaboration with cloud architects, IoT engineers, and product leadership — a technically rich, cross-disciplinary environment.

What to Include in Your Application

Please include:

• Links to or names of mobile applications you have personally published on the App Store and/or Google Play Store.
• A brief description (3–5sentences) of a native-to-React Native migration or team transition you have led.
• Your GitHub profile or code portfolio if available.

Overview 

• Our business environment relies heavily on software for many functions - from intelligent monitoring systems to automation processes, and cloud computing continues to allow us to modernize, consolidate IT infrastructure, automate workloads and pursue next-generation innovation. 
• To continue this transformation, we're seeking engineer with expertise in software technology, firm grasp of emerging technologies, platform, applications, and ability to customize to help our business become more secure and efficient. 
• You'll participate in all aspects of the desktop/web development lifecycle for solution including designing, implementing, building, deploying, testing, and troubleshooting market issues to ensure high standard of application performance, uptime, scale, code quality and thoughtful design.

Responsibility

• Software Development: Designing, developing, testing, deploying and maintaining modular-based systems in accordance with best practices.
• Problem Solving: Troubleshoot incidents, identify root cause, fix and document problems, and implement preventive measures.
• Agile Scrum Practices: Participate actively in Agile Scrum processes, including sprint planning, daily stand-ups, retrospectives, and demos.
• Collaboration: Work closely with cross-functional teams, including product management, design, and QA to ensure seamless integration and delivery.
• Documentation: Maintain accurate and up-to-date technical documentation of software components and systems.

Requirements

• Experience: 8+ years of experience in software development with a focus on Windows applications, web applications, and cloud services (optional).
• Proficient in C#, .NET framework, Java, and/or python.
• Experience with desktop applications such as Windows Forms, WPF.
• Proficient with web development frameworks such as HTML, CSS, JS, Angular, Vue.js, Node.js, RESTful API.
• Proficient with database management systems like relational DB, NoSQL.
• Experience with OOAD and/or UML.
• Experience with DevOps tools like Azure DevOps, GitHub, or similar CI/CD pipelines.
• Agile Methodologies: Proven experience with Agile Scrum development processes.
• Communication: Excellent communication and interpersonal skills.
• Education: Bachelor's degree in Computer Science, Software Engineering, or a related field.

Overview

We seek a highly skilled Full Stack Software Engineer proficient in Java Spring Boot backend and modern React frontend technologies. You will shape the future technical direction of user journeys within Wealth Management, innovating financial applications for our internal users and clients.

Key Responsibilities

• You will design, develop, and maintain full-stack applications using Java Spring Boot and React for our internal users and clients in Wealth Management.
• You will build and optimize RESTful APIs and microservices.
• You will implement and maintain Micro Frontend (MFE) architectures.
• You will drive best practices across the entire technology stack.
• You will collaborate with business analysts, project managers, business stakeholders, and other tech teams to integrate and deliver high-quality products.
• You will troubleshoot complex production issues spanning frontend and backend.
• You will drive technical innovation and continuous improvement initiatives.
  You will participate in system design discussions and contribute to the technical roadmap.

Required Backend Technical Skills

• Strong proficiency in Java (Java 17+) with deep understanding of core concepts, coupled with expert-level Spring Boot framework knowledge (MVC, Data, Security, Cloud).
• Strong understanding of modulith/microservices patterns and best practices, alongside experience with relational databases (e.g., MariaDB, PostgreSQL) and SQL optimization.
• Strong knowledge of RESTful API design principles and experience with message queues (Ka a, IBM MQ, etc.).
• Proven expertise in unit testing and integration testing (JUnit, Mockito, Karate), and a strong understanding of design patterns and SOLID principles.

Required Frontend Technical Skills

• Expert-level Typescript React 18+ experience, demonstrating deep understanding of hooks, context, and component lifecycle.
• Strong proficiency in Redux, Redux Toolkit (RTK), and RTK Query for state management and data fetching.
• Expert-level knowledge of modern web technologies: Micro Frontend (MFE) architecture (Module Federation, Single-SPA), advanced HTML5, semantic markup, and expert-level CSS3 (Flexbox, Grid, responsive design, CSS-in-JS like Styled Components, Emotion).
• Strong command of modern JavaScript/TypeScript (ES6+), frontend build tools (Webpack, Vite), and testing frameworks (Jest, React Testing Library, Cypress, Playwright).
• Proven expertise in performance optimization (code splitting, lazy loading) and practical application of design systems and component libraries (e.g., Storybook) for consistency and efficiency across frontend engineering.

Additional Technical Experience (Preferred)

• You will ideally have experience with Cloud platforms (PCF, AWS, OCP), Containerization on (Docker), and orchestration (Kubernetes) to build and deploy robust applications, and be proficient in CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions) and possess a strong understanding of DevOps practices to streamline development and operations. 
• You will ideally understand System Design and Architecture principles, particularly Event-driven architecture, to create resilient and scalable solutions. 
• You will ideally leverage Monitoring and observability tools (Prometheus, Grafana, ELK stack, Sentry) and employ Performance profiling and optimization techniques (Lighthouse, Web Vitals) to ensure high-performing and stable systems.

Architecture & Design Skills

• You will architect, design, and implement scalable, resilient, and secure systems, leveraging Microservices, Micro Frontend, API design and integra on pa erns, and robust distributed systems with effective caching.
• You will apply Domain-driven design (DDD) principles to evolve our financial services, ensuring security through best practices (OAuth, JWT, CORS, XSS, CSRF prevention).
• You will translate complex business challenges into robust, elegant technical solutions and skillfully evaluate trade-offs, making data-driven decisions that balance short-term goals with long-term system health and performance optimization.

Job Description & Requirements

• Design, develop, test, and maintain applications using Node.js and Python
• Build and manage RESTful APIs and microservices architecture
• Work extensively in Linux/Unix environments for development and deployment
• Write efficient, reusable, and scalable code following best practices
• Collaborate with cross-functional teams (Product, QA, DevOps)
• Troubleshoot, debug, and optimize application performance
• Manage application deployments, monitoring, and log analysis on Linux servers
• Work with databases (SQL/NoSQL) to design efficient schemas
• Ensure application security, reliability, and scalability
• Bachelor’s degree in Computer Science or related field
• 4+ years of experience in backend development
• Strong expertise in:Node.js (Express.js / NestJS)Python (Django / Flask / FastAPI)
• Hands-on experience with Linux/Unix systems

Responsibilities:

• Collaborate with product managers, software architects, and other stakeholders to understand requirements and translate them into technical solutions.
• Design, develop, and maintain high-quality software applications, either on the frontend or backend, using Java and the Spring framework.
• Write clean, efficient, and secure code, following best practices and coding standards.
• Participate in code reviews to ensure code quality, identify potential issues, and provide constructive feedback.
• Conduct unit testing and debugging to ensure proper functionality and identify and resolve defects.
• Collaborate with frontend or backend development teams, depending on your expertise, to integrate components and ensure seamless application flow.
• Design and implement scalable and secure backend solutions using Java programming language.
• Work closely with the QA team to support testing efforts, troubleshoot issues, and resolve defects in a timely manner.
• Collaborate with DevOps teams to implement CI/CD pipelines and automate deployment processes.
• Collaborate with cross-functional teams, including product management, UX/UI designers, and operations teams, to ensure successful project implementation.
• Contribute to the continuous improvement of development processes and the adoption of best practices and technologies.
• Provide support and assistance to other developers, promoting knowledge sharing and collaboration.
• Implement CI/CD pipelines and automate deployment processes.
• Stay up-to-date with industry trends, emerging technologies, and security best practices, particularly related to payment systems and secure coding.

Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, Information Technology or a related field.
• Proven experience (3+ years) as a Software Developer, with expertise in either frontend or backend development. Full-stack proficiency is a plus.
• Strong proficiency in Java, Javascript and experience with the related framework (e.g., Spring).
• Familiarity with securities concepts and secure coding practices, ensuring the development of robust and secure software applications.
• Experience in developing and integrating payment systems is highly desirable.
• Familiarity with databases and ORM technologies (e.g., Hibernate) for data modeling and persistence.
• Understanding of version control systems, such as Git, and familiarity with Agile methodologies.
• Knowledge of frontend build tools (e.g., Git, and familiarity with Agile methodologies.
• Grunt, Gulp and package managers (e.g., npm, Yarn) is a plus.
• Strong problem-solving and analytical skills, with the ability to analyze requirements and implement effective technical solutions.
• Excellent teamwork and communication skills, with the ability to collaborate effectively with cross-functional teams.
• Strong attention to detail and commitment to writing clean, maintainable, and efficient code.
• Familiarity with cloud platforms is a plus.
• Experience with containerization technologies (e.g., Docker) is desirable.
• Relevant certifications in Java or related fields are advantageous.

Embedded Linux & IoT Application Developer

Job Summary

We are seeking a skilled Embedded Linux & IoT Application Developer to design, develop, and maintain intelligent automation and connected device solutions. The ideal candidate will have strong experience in Embedded Linux, IoT protocols, middleware development, device integration, and cloud connectivity. You will play a key role in building scalable systems that connect sensors, controllers, mobile applications, and cloud platforms for smart building and automation environments.

Key Responsibilities

• Develop and maintain Embedded Linux and IoT applications using Python and C.
• Design and implement communication solutions using MQTT, Modbus, RS485, and REST APIs.
• Integrate various hardware devices including sensors, controllers, RFID readers, Android terminals, and edge computing devices.
• Develop middleware services enabling real-time communication between embedded devices, backend servers, cloud platforms, and mobile applications.
• Build and support automation systems for smart buildings, room automation, access control, lift integration, and related IoT applications.
• Design secure and reliable device-to-cloud connectivity architectures.
• Troubleshoot, debug, and optimize embedded software and Linux-based systems to ensure high performance and reliability.
• Deploy and manage applications on Linux platforms using Docker containers and systemd services.
• Monitor system performance, identify bottlenecks, and implement optimization strategies.
• Collaborate with hardware engineers, mobile developers, cloud teams, and project stakeholders to deliver integrated solutions.
• Prepare technical documentation, deployment procedures, and maintenance guides.
• Participate in system testing, commissioning, and production deployments.

Required Qualifications

• Bachelor's degree in Computer Engineering, Electronics Engineering, Computer Science, or a related field.
• Proven experience in Embedded Linux application development.
• Strong programming skills in Python and C.
• Hands-on experience with MQTT, Modbus, RS485, and REST API integration.
• Experience integrating IoT devices, sensors, controllers, RFID systems, and Android-based terminals.
• Solid understanding of Linux operating systems, networking, and system administration.
• Experience with Docker containerization and system service management.
• Strong debugging, troubleshooting, and performance optimization skills.
• Familiarity with cloud-based IoT platforms and device management solutions.
• Knowledge of TCP/IP networking and communication protocols.

Role Overview:

We’re looking for an Oracle PL/SQL Developer with strong experience in banking payment systems, UNIX scripting, and scheduling tools.

You’ll work on maintaining, enhancing, and supporting mission-critical applications for SWIFT, MEPS+, and risk/payment platforms.

Key Responsibilities:  Develop, optimize, and maintain SQL, PL/SQL procedures, functions, packages, and triggers for Oracle databases 9i/10g/11g/12cWrite and maintain UNIX/AIX shell scripts for batch jobs, data loads, and system automation

Support and monitor batch schedules using Control-M scheduler

Troubleshoot issues in payment systems: SWIFT Alliance [AWP, SAA, SAG], SWIFT Online Operation Manager, and MEPS+

Work with risk and compliance tools like Risk Authority (RAY) Moody’s and BAE Systems DETICA

Manage code/version control using ClearCase, ClearQuest, and Aldon

Perform data analysis and debugging using SQL_Plus, SQL Developer, TOAD, and ORMSCollaborate with business, QA, and production support teams for deployments and incident resolution

Required Skills:

• Languages: SQL, PL/SQL, Unix Shell Scripting
• Databases/Tools: Oracle 9i/10g/11g/12c, ORMS, SQL_Plus, SQL Developer, TOAD, Control-M scheduler, ClearCase, ClearQuest, Aldon
• Risk/Payment Systems: Risk Authority (RAY) Moody’s, BAE Systems DETICA, MEPS+, SWIFT Alliance [AWP, SAA, SAG], SWIFT Online Operation Manager
• Operating Systems: Windows, UNIX AIXGood to Have:  Experience in banking domain, payment processing, or treasury systems
• Mandatory: Experience with SWIFT Alliance, MEPS+, and regulatory compliance systems.