Job Description

Senior Gemstone Developer Location: Centurion
Work Model: Hybrid
Job Purpose The Senior Gemstone Developer is responsible for the design, development, optimisation, and maintenance of complex Gemstone-based applications. This role provides technical leadership, ensures system stability, performance, and scalability, and supports the growth of the development team through mentorship and best-practice guidance.
Responsibilities

• Design, develop, test, maintain, and optimise Gemstone/S Smalltalk applications to ensure high performance, scalability, and reliability.
• Translate business and functional requirements into well-structured, maintainable technical solutions aligned with best practices.
• Contribute to system architecture and design decisions, ensuring alignment with enterprise standards and security principles.
• Conduct code reviews, enforce coding standards, and support adherence to SDLC and governance processes.
• Investigate, troubleshoot, and resolve complex production issues, including performance tuning and root cause analysis.
• Collaborate closely with business analysts, testers, DevOps, and infrastructure teams throughout the delivery lifecycle.
• Provide technical input into solution scoping, estimation, and delivery planning.
• Identify technical risks and proactively recommend mitigation strategies.
• Provide technical leadership, mentorship, and guidance to junior and intermediate developers.
• Contribute to documentation, knowledge sharing, and continuous improvement initiatives.

Qualifications, Knowledge & Experience

• Bachelor's Degree in Computer Science, Information Technology, Engineering, or related field (or equivalent practical experience).
• 7+ years' experience in software development.
• 4+ years' hands-on experience with Gemstone/S Smalltalk or similar object-oriented persistent environments.
• Experience working on enterprise-scale production systems.
• Strong understanding of object-oriented design principles and design patterns.
• Experience with database design, persistent object stores, and performance tuning.
• Advanced debugging, profiling, and system optimisation skills.
• Experience with version control systems (Git, SVN, etc.).
• Understanding of CI/CD pipelines and modern deployment practices.
• Experience in high-transaction or enterprise environments is advantageous.

Skills Required