Key responsibilities

. Own the architecture, design, development, testing and ongoing improvement of core backend services and enterprise applications, primarily using Java.

. Design and evolve modular microservice architectures and service interfaces that support scalability, maintainability and reliable integration.

. Engineer high-concurrency, high-availability backend systems, identifying and resolving performance bottlenecks across application and service layers.

. Design robust business workflows and data-processing components, with careful attention to data integrity, consistency, traceability and recovery.

. Set technical direction through architecture reviews, design discussions, code reviews and clear engineering standards.

. Lead complex production investigations, coordinate root-cause analysis and implement preventive improvements to system stability and operational reliability.

. Strengthen software delivery practices through automated testing, continuous integration and deployment, release controls and development tooling.

. Work closely with product, QA, infrastructure and other engineering stakeholders to translate requirements into maintainable technical solutions.

. Coach and mentor engineers, support technical capability development and promote sound engineering practices across the team.

. Evaluate and responsibly adopt engineering tools, including AI-assisted development tools, where they improve implementation, debugging, test validation and technical documentation.

Essential requirements

. Bachelor's degree in Engineering, Computer Science, Information Technology or a closely related discipline.

. At least 10 years of professional software development experience, including substantial hands-on backend engineering experience.

. Strong, practical Java development experience and a track record of designing, building and maintaining enterprise-scale backend applications.

. Demonstrated experience with microservice architecture, service integration, API design and distributed application principles.

. Experience designing or operating systems with demanding concurrency, throughput, availability, scalability and reliability requirements.

. Strong understanding of software architecture, application performance, data integrity, fault handling and maintainable system design.

. Experience leading technical design decisions, conducting code and design reviews, and taking ownership of complex engineering deliverables.

. Practical experience with automated testing and software delivery practices, including Docker, Jenkins and CI/CD pipelines.

. Experience diagnosing production issues, managing releases and improving the stability and quality of live systems.

. Ability to communicate technical trade-offs clearly and collaborate effectively across engineering and business functions.

. Demonstrated ability to mentor engineers and raise the technical standards of a development team.

Advantageous experience

. Experience integrating AI-assisted development tools into established engineering workflows, with appropriate human review, testing and quality controls.

. Experience designing enterprise workflows involving complex business rules, reconciliation, data migration or high-volume order and inventory processing.

. Experience establishing engineering standards, improving development productivity or leading cross-functional technical initiatives.

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e2i is the empowering network for workers and employers seeking employment and employability solutions. e2i serves as a bridge between workers and employers, connecting with workers to offer job security through job-matching,career guidance and skills upgrading services, and partnering employers toaddress their manpower needs through recruitment, training, and job redesign solutions.e2i is a tripartite initiative of the National Trades Union Congress setup to support nation-wide manpower and skills upgrading initiatives. By applying for this role, you consent to Quesscorp Singapore's PDPA and e2i'sPDPA. By submitting your application for this position, you consent to the collection, use, and disclosure of your personal data by Quesscorp and its recruitment partners, including Employment and Employability Institute Pte Ltd, for the purpose of i) employment facilitation and ii) data and statistical analysis. You may find out more information on the PDPA policies at Quesscorp website and[https://www.e2i.com.sg/pdpa/].

Principal Backend Development Engineer (Contract Role)