Senior Gemstone Developer

Psybergate is an IT company that builds bespoke software solutions and provides highly skilled resources to its clients.

We are looking for a Senior Gemstone Developer to join our client based in Centurion for a hybrid role.

• Design, develop, test, and maintain applications built on the Gem Stone/S Smalltalk platform.
• Translate business and functional requirements into high‑quality technical solutions.
• Write clean, efficient, well‑documented, and maintainable code aligned with best practices.
• Perform code reviews and provide constructive technical feedback to team members.
• Optimise system performance, reliability, and scalability of existing applications.
• Troubleshoot complex production issues and implement robust fixes.
• Contribute to system architecture and design decisions for new and existing platforms.
• Ensure solutions are aligned with enterprise architecture standards and security principles.
• Participate in technical design sessions and solution walkthroughs with stakeholders.
• Ensure adherence to SDLC, coding standards, and version control practices.
• Identify technical risks and proactively recommend mitigation strategies.
• Work closely with business analysts, testers, Dev Ops, and infrastructure teams.
• Provide technical guidance and mentorship to junior developers.
• Communicate complex technical concepts clearly to non‑technical stakeholders.
• Advocate for best practices, knowledge sharing, and continuous improvement.

• 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 Gem Stone/S Smalltalk or similar object‑oriented persistent environments.
• Proven experience working on enterprise‑scale systems in a production environment.
• Advanced understanding of object‑oriented design and design patterns.
• Experience with database design, persistent object stores, and performance tuning.
• Strong debugging, profiling, and system optimisation skills.
• Experience with version control systems (Git, SVN, etc.) and CI/CD pipelines.
• Experience in financial services, insurance, investments, or high‑transaction environments is advantageous.
• Strong analytical and problem‑solving skills, attention to detail, and quality orientation.
• Ability to work independently and take ownership of complex deliverables.
• Strong collaboration, communication, and mentorship skills.

• Gem Stone/S Smalltalk
• Object‑Oriented Programming
• Enterprise Software Development
• CI/CD & Version Control
• Git
• SVN