Top Java Developer Jobs in Singapore

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.

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.

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.

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.

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.

Senior QA Automation Engineer responsible for designing, building, and maintaining Rust/Java-based automated test frameworks. Participate across the SDLC to create test plans, execute black-/white-box, security, performance, and mobile testing, diagnose root causes, and improve testing processes. Collaborate with engineers, PMs, designers, and operations to ensure system reliability across web, desktop, and mobile platforms. Apply AI models in testing where applicable and coordinate with global stakeholders in English and Mandarin.

Join the Futures QA Automation team to design and execute test plans across web, desktop, and mobile. Develop and run automated, performance, security, and mobile-specific tests; set up testing environments (Node.js, Java, Go, Python, local blockchain); diagnose root causes; collaborate with engineers, PMs, designers, and operations to improve quality and processes.

Design and execute functional, integration, regression, and end-to-end tests for high-throughput, low-latency backend trading systems. Validate real-time data flows, messaging, caching, and data integrity (WebSocket, Kafka, Redis, databases). Collaborate with product and engineering, document defects, and improve testing processes, tooling, and automation.

Design, build, and maintain scalable, highly available backend services in Java. Own backend architecture, optimize performance, develop APIs and integrations, support production, conduct code reviews, and contribute to AI engineering tools and infrastructure.

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.

Seeking a Principal Engineer with 10+ years of experience in Java and full-stack development. Responsible for leveraging strategic IT skills and knowledge in MSA, cloud services, and agile methodologies.

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, implement, and support enterprise software using Java/Spring Boot and Angular. Collaborate with product and agile teams to design, code, test, review and deploy microservices and APIs, provide production support, document artifacts, and ensure scalability, performance and adherence to architecture and best practices.

Hands-on Java developer responsible for designing, implementing, and supporting low-latency front-office trading and quoting applications. Work with business users to translate requirements, build observability, monitor production, resolve incidents, and mentor junior engineers within an agile global team focused on reliability, security, and compliance.

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.

Administer, monitor, and support Java applications and Genesys Cloud. Provide production troubleshooting, minor bug fixes and enhancements, and act as primary POC for Java apps. Develop/support microservices using Java and Spring Boot, perform analysis of system behavior, and apply problem-solving and diagnostics to maintain service quality.