Senior Software Engineer

Key Responsibilities 1. System Development and Project Delivery · Provide technical leadership for the successful implementation of large-scale or mission-critical systems from conception through delivery and operational handover. · Contribute to software work planning, estimation, task allocation, dependency management and technical risk management; track engineering progress and escalate delivery concerns early. · Coordinate software activities across internal teams, subcontractors, product vendors and customer stakeholders to achieve agreed scope, quality and schedule objectives. · Lead or support system integration, Factory Acceptance Testing (FAT), User Acceptance Testing (UAT), production deployment, commissioning and go-live activities, including on-site troubleshooting where required. · Ensure implementation evidence, technical documentation, configuration records and operational handover materials are complete and fit for purpose. 2. Application Development and Integration · Design, develop, enhance and maintain C# .NET applications and RESTful APIs for secure data exchange between core systems and third-party government or vendor platforms. · Implement complex software designs as production-quality code, including error handling, logging, auditability, security controls, performance optimisation and automated testing where applicable. · Lead the integration of applications with cloud-native services, enterprise platforms, real-time systems and hardware-software interfaces where required. · Diagnose and resolve complex application, interface and performance issues across multiple system components. 3. Code Quality and Engineering Governance · Conduct code, design and pull-request reviews to ensure correctness, maintainability, testability, security and adherence to coding standards and engineering best practices. · Establish or improve coding guidelines, branching strategies, reusable components, development practices and Definition of Done for the engineering team. · Promote secure software development, configuration management, version control, CI/CD, automated build and deployment practices. · Identify technical debt and recommend pragmatic remediation plans that balance operational risk and delivery priorities. 5. Data, Analytics and Database Engineering · Design, optimise and maintain complex Microsoft SQL Server queries, stored procedures, triggers and database objects to support performance, data integrity and availability under mission-critical conditions. · Provide technical oversight for data models, database changes, migration activities, reconciliation and troubleshooting. · Where required, develop or guide end-to-end Power BI solutions, including Power Query, data modelling, DAX measures and real-time dashboards for operational monitoring and management reporting. 6. Testing, Deployment and Operational Support · Define the software approach for unit, integration, system and regression testing, and work with testing teams to ensure adequate coverage and timely defect resolution. · Guide release readiness assessments, deployment planning, rollback planning and production verification. · Lead complex incident investigations and root cause analysis; identify corrective and preventive actions to improve system stability and availability. · Support compliance with public-sector service levels, cybersecurity requirements, change controls and operational procedures. 8. Customer and Stakeholder Engagement · Engage customers and end users to clarify requirements, explain technical options, demonstrate solutions and address implementation concerns. · Communicate technical matters clearly to project managers, architects, engineers, testers, vendors and non-technical stakeholders. · Prepare and maintain solution designs, interface specifications, deployment guides, troubleshooting procedures and other project documentation. Key Skills/ Experience/ Qualifications · Degree in Computer Science, Software Engineering, Information Technology or a related discipline, or equivalent practical experience. · Typically 8 or more years of hands-on software development experience, including substantial experience in enterprise, large-scale or mission-critical environments. · Demonstrated experience successfully implementing at least one large-scale system or project through design, development, integration, testing, deployment and operational handover. · Proven experience providing technical leadership to software engineers, including work planning, design guidance, code review, troubleshooting and mentoring. · Strong proficiency in C# and .NET Core and/or .NET Framework, with sound knowledge of object-oriented design, asynchronous programming, software design patterns and application performance. · Hands-on experience designing, developing and consuming RESTful APIs using JSON and/or XML, with knowledge of authentication, authorisation, API security, error handling and interface versioning. · Strong knowledge of Microsoft SQL Server and T-SQL, including schema design, complex queries, stored procedures, performance tuning, data integrity and database troubleshooting. · Alternatively or additionally, proven Power BI experience involving Power Query, semantic/data modelling, DAX and operational or management dashboards. · Experience with Git-based version control, code review practices, CI/CD pipelines, automated build and deployment, and release/configuration management. · Experience with Microsoft Azure or Government Commercial Cloud, including integration with relevant cloud-native services. · Working knowledge of Agile, Scrum or hybrid delivery methods and large-scale testing cycles such as FAT and UAT. · Strong analytical, troubleshooting, estimation, documentation, communication and stakeholder-management skills. · Experience in real-time systems, complex system integration, distributed applications or hardware-software interfacing is advantageous. · Experience working with Singapore Government agencies or statutory boards, and familiarity with public-sector ICT governance, security and compliance requirements, is advantageous.