Gemstone / SmallTalk Developer

Recruiter:

ARCS

Job Ref:

PTA001228/TM

Date posted:

Monday, January 26, 2026

Location:

Centurion, South Africa

SUMMARY:

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.

POSITION INFO:

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.

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