Senior Gemstone Developer

Sabenza IT & Recruitment; Johannesburg; On-site; ZAR 300 000 - 400 000; Full time

Job summary

A recruitment agency is seeking a Senior Gemstone Developer in Johannesburg to solve complex problems and optimize systems for a client in the financial services sector. The ideal candidate will have over 7 years of software development experience, including 4 years with Gemstone/S or similar object-oriented environments. Responsibilities include technical development, architecture design, and mentoring junior staff. A hands-on and leadership role tailored for professionals looking for a dynamic challenge.

Qualifications

• 7+ years’ experience in software development.
• 4+ years’ hands-on experience with Gemstone/S or similar environments.
• Proven experience in enterprise-scale systems.

Responsibilities

• Technical Development & Delivery for Gemstone-based applications.
• Architecture & Systems Design ensuring performance.
• Mentorship of junior developers.

Skills

Gemstone/S Smalltalk

Software development

Debugging

Version control (Git, SVN)

Database design

Performance tuning

CI/CD pipelines

Education

Bachelor’s Degree in Computer Science or related field

Job description

Overview

Are you a Senior Gemstone Developer who thrives on solving complex problems, building high-performance systems, and shaping enterprise-grade platforms? Our client in the financial services sector is looking for a seasoned specialist to play a critical role in the design, optimization, and long-term stability of their Gemstone-based applications.

This is a senior, hands-on role where your technical expertise, architectural input, and mentorship will directly influence large-scale, high-transaction systems in a dynamic and demanding environment.

Location: Gauteng

Responsibilities

• Technical Development & Delivery
• Architecture & Systems Design
• Quality, Risk & Governance
• Collaboration & Stakeholder Engagement
• Leadership and mentorship

Qualifications, Knowledge and 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.
• 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.).
• Understanding of CI/CD pipelines and modern deployment practices.
• Experience in financial services, insurance, investments or high-transaction environments (advantageous).

If you are a Gemstone or Smalltalk fundi and this role speaks to you, get your applications across.