Top Java Developer Jobs in Singapore

Develop and maintain Java services and front-end desktop applications for equities derivatives pricing and trading workflows. Integrate AI/ML autopricers, build scalable cloud-deployed APIs, collaborate with trading, sales and quant teams, and participate in code reviews and delivery lifecycle.

Lead design and deliver high-quality, secure Java-based microservices and web applications. Drive architecture reviews, operational stability, CI/CD automation, and adoption/governance of AI-assisted engineering practices while mentoring engineers and promoting reuse and secure SDLC standards.

Lead an agile team to design, develop, test, and operate high-quality, secure, and scalable order management/trading systems for equities. Provide technical guidance, influence product and architecture decisions, drive adoption of firmwide frameworks and best practices, and ensure operational stability.

Lead development and maintenance of a resilient, cloud-native algorithmic equities trading platform. Design and implement trading strategies, produce high-quality Java production code, ensure operational stability, drive automation/CI-CD, collaborate with front office, evaluate vendors, and lead engineering best practices.

Design, develop, test, and maintain secure, scalable cloud platform services. Produce high-quality production code, architecture artifacts, and data-driven insights. Use enterprise AI-assisted development tools responsibly, participate in CI/CD and resiliency practices, and troubleshoot complex production issues to ensure operational stability.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Provides application support for business-critical systems by troubleshooting production issues, monitoring performance, resolving incidents, supporting enhancements and deployments, debugging, conducting root cause analysis, maintaining technical documentation, and participating in continuous improvement. Collaborates with developers, business users, and support teams to maintain application stability and availability.

Internship QA Engineer supporting Binance’s compliance and digital finance products. Responsibilities include understanding business and technical scenarios, designing and reviewing test cases, executing functional and regression testing, tracking defects, and developing automation scripts. Requires hands-on Java coding, MySQL familiarity, QA methodology knowledge, analytical and troubleshooting skills, communication, and a five-day-per-week commitment.

Participate in testing backend microservices across APIs and service integrations. Design and execute functional, integration, and regression tests; track defects; validate MySQL data, idempotency, Kafka messaging, Redis state, and cross-service behavior. Build Java-based automated test suites using tools such as JUnit, TestNG, and REST Assured. Collaborate with developers and product managers, and use AI tools to improve testing coverage and efficiency.

Participate in Android and iOS app testing, including functional and regression testing. Design, execute, and review test cases; identify, track, and verify bug fixes; and collaborate with developers and product managers to resolve issues. Use AI tools to improve testing efficiency and coverage. This is a six-month, full-time early-career program requiring five days per week.

Build, maintain, and optimize scalable full-stack applications using React.js and Java. Develop microservices and API integrations, manage CI/CD pipelines, and architect cloud infrastructure on AWS or Azure using Kubernetes, EKS, or AKS. Troubleshoot frontend, backend, and infrastructure issues while improving application performance, security, and scalability. Collaborate cross-functionally and apply modern full-stack development practices.

Develop and maintain backend services using Java, microservices, Spring Boot, REST APIs, AWS, and Kubernetes. Apply object-oriented programming, test-driven development, JUnit, build automation, and CI/CD practices. Collaborate with a leading client and communicate effectively with technical and business stakeholders. Candidates must be based in Singapore and able to start within four weeks.

The Senior Full Stack Developer will design and maintain web applications using React.js and Java, manage cloud infrastructure on AWS/Azure, and optimize microservices. They will collaborate with teams to enhance API performance and troubleshoot full-stack issues.

Design, build, and operate core wallet backend modules handling address management, transaction construction/broadcasting, nonce and gas handling, multi-chain integrations, monitoring, and incident troubleshooting. Own module design and delivery, improve system reliability and performance, integrate new blockchains and asset standards, and apply AI coding tools to increase engineering efficiency while maintaining high security and production stability.

As a Java Developer at Citi, you will enhance systems, provide programming solutions, analyze codes, coach analysts, and ensure application security.

As a Senior Java Engineer, you will design, develop, and maintain applications, write integration tests, and collaborate in an agile team.

Design, develop, refactor, and optimize core backend components for high-concurrency, high-performance systems. Contribute to architecture, full lifecycle development, deployments, monitoring, and cross-team collaboration while researching and implementing scalable solutions.

Responsible for designing, developing, and optimizing core system components. Involved in technical innovation, system architecture, and lifecycle participation while collaborating with teams.

Design, develop, refactor, and optimize backend system components. Build and maintain high-concurrency, high-performance, and highly available systems. Contribute to architecture, participate in full development lifecycle, research technical solutions, and collaborate with regional teams while sharing best practices.

Develop scalable backend compliance products using Java, Spring, microservices, databases, and messaging systems. Responsibilities include implementing product features, performance tuning, incident troubleshooting, system refactoring, resolving compliance issues, and collaborating across teams. The role requires strong distributed-systems knowledge, clean coding practices, cross-functional communication, and familiarity with Spring Cloud, Kafka, fintech, APIs, and cryptocurrency compliance.

Design and build highly available, high-concurrency payment backend systems for OKX Pay. Implement scan-to-pay, transaction processing, crypto/stablecoin on-chain flows, reconciliation, refunds, and robust state transitions. Ensure system stability, security of funds, observability, and drive incident resolution and architectural improvements.

Develop, analyze, design, test, and implement application systems. Perform feasibility studies, estimate time/cost, provide user and operational support, recommend security and process improvements, consult with stakeholders, coach junior analysts, and ensure compliance with policies and risk controls.

Design, develop, maintain, and optimize backend and big-data systems for Binance's Web3 security domain. Build scalable, high-concurrency services, improve security tooling and threat detection, work with data teams on collection and processing, and collaborate with cross-functional and global stakeholders to deliver security-focused technical solutions.

Develop and maintain Java-based products (ProGuard, DexGuard), research and implement code-hardening and optimization techniques, work with Java bytecode and compiler technology, debug complex issues, support customers on integration and troubleshooting, and improve software quality in a team building an R&D presence in Singapore.

The role involves leading development teams, coding in Java, reviewing technical solutions, and ensuring compliance in application delivery related to payments integration.