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Psybergate Pty Ltd

Senior Gemstone Developer

Psybergate Pty Ltd

  • R Undisclosed
  • Contract Senior position
  • Centurion
  • Posted 21 Jan 2026 by Psybergate Pty Ltd
  • Expires in 28 days
  • Job 2631366 - Ref PR000722

About the position

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.
What you will be doing:

  • Design, develop, test, and maintain applications built on the GemStone/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, DevOps, 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.

What we are looking for:
  • 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.
  • 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.

Please note that if you do not hear from us within 3 weeks, consider your application unsuccessful.

Desired Skills:

  • GemStone/S Smalltalk
  • Object-Oriented Programming
  • Enterprise Software Development
  • CI/CD & Version Control
  • Git
  • SVN

Psybergate Pty Ltd

About the agency

Psybergate is a South African software, solutions and skills company. Formed in 1999 as a custom software development company, Psybergate has grown and expanded its service offering to include solution implementation, skill development and resource augmentation. As such, our service offering includes software implementation services and the provisioning of permanent and contracting resources to our clients, with a focus on those resources involved across the Software Development Life Cycle.

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