Systems Developer_Centurion

Express Employment Professionals (VAAL); Centurion; On-site; ZAR 502,000 - 558,000; Full time

Job summary

Express Employment Professionals (VAAL) is seeking a Systems Developer and Implementation Specialist for a 6-month fixed-term contract in South Africa. The role focuses on replacing a legacy Microsoft Access system, continuing Supabase-based development, data migration, testing and roll-out, plus staff training.

The candidate will build and maintain a modern operational platform using Supabase, PostgreSQL and API integrations, while ensuring security, documentation and adoption by users across

Qualifications

• Practical SQL, PostgreSQL and relational database design experience. Experience with Supabase or a comparable cloud backend platform. Web application development and API integration experience.
• Experience migrating data from Microsoft Access or similar legacy systems. Practical experience with AI-assisted or Vibe Coding tools such as Lovable, Cursor, Claude Code, GitHub Copilot or ChatGPT.
• Experience with authentication, permissions, testing, deployment and reporting. Strong business-process analysis, communication and user-training skills.
• Experience developing inventory, warehouse, asset-management, field-service, job-management or ERP-related solutions will be highly advantageous.

Responsibilities

• Legacy System Replacement: document existing workflows, design replacement database and app architecture, migrate data, and implement security and audit trails.
• Operational Platform Development: extend the Supabase-based platform with inventory, asset management, and job-management modules.
• Database and Application Development: build PostgreSQL structures, with authentication, permissions, and APIs; manage code with Git.
• Business Process and Solution Design: map workflows, prototype automation, and productionize features.
• Testing Implementation and Rollout: perform functional, data, and user acceptance testing and rollout modules to departments.
• Training and Documentation: create user guides and maintain source code repositories and admin docs.

Skills

SQL

PostgreSQL

Supabase

Web development

API integration

Data migration

AI-assisted tooling

GitHub Copilot

Tools

Lovable

Cursor

Claude Code

GitHub Copilot

ChatGPT

Job description

Job Specification

Systems Developer and Implementation Specialist

6-Month Fixed-Term Contract

• Contract period: 6 months fixed term
• Position: Systems Developer and Implementation Specialist
• Maximum salary: R50,000 per month

Purpose of the Position

The client is modernising its internal operational systems and requires a hands-on specialist to develop, implement and roll out the new solutions across the business.

The successful candidate will replace an existing Microsoft Access system, continue development of the company's Supabase-based operational platform, migrate data, test and deploy the solutions, and train employees to use them effectively.

This is an implementation-focused role. Success will be measured by working systems that are adopted by users, supported by reliable data and properly documented.

1 Key Responsibilities

Legacy System Replacement

Reviewing the current databases, forms, queries, reports and business logic. Documenting existing workflows and identifying processes that should be improved. Designing the replacement database and application architecture. Cleaning, mapping, migrating and validating historical data. Rebuilding the required workflows, forms, reports and dashboards. Implementing suitable security, access control, backup and recovery measures.

Operational Platform Development

Continue development of the company's operational platform using Supabase and modern AI-assisted or Vibe Coding tools. Priority modules include:

• Inventory and warehouse management, including receiving, serialised stock, locations, transfers, picking, delivery, returns and barcode functionality.
• Asset management, including customer asset identifiers, serial numbers, locations, warranties, movements, swap-outs, repairs and lifecycle history.
• Technical job management, including allocation, scheduling, site attendance, work records, photos, stock usage, configuration details, customer sign-off and reporting.
• Additional operational modules and workflows agreed during the contract period.

Database and Application Development

Develop and maintain Supabase, PostgreSQL and SQL database structures. Create appropriate relationships, views, functions, validations and audit trails. Implement authentication, role-based permissions and row-level security. Develop or integrate APIs where required. Use Git or GitHub to manage source code and changes. Apply sound architecture, security, testing and coding standards when using AI-assisted development tools.

2 Business Process and Solution Design

Work directly with management and operational staff to understand requirements and convert them into practical system functionality. The candidate will map workflows, identify opportunities for automation, build prototypes, obtain user feedback and refine the solution into production-ready functionality.

3 Testing Implementation and Rollout

Complete functional, data, workflow, permission, mobile and desktop testing. Coordinate user acceptance testing and resolve defects before deployment. Prepare implementation plans and migrate the required operational data. Set up users and permissions and roll out modules to the relevant departments. Monitor adoption, resolve initial issues and improve the system from user feedback. Retire the old system when the replacement is stable and approved.

A module will only be regarded as delivered once it has been tested, accepted, deployed and adopted by the business.

4 Training and Documentation

Prepare user guides, quick-reference material and training content. Train employees, key users and system administrators. Provide initial support after implementation. Document the system architecture, database structure, business rules, permissions, integrations, deployment process and backup procedures.

Maintain complete and current source-code repositories and administrator documentation.

All source code, database structures, documentation and related intellectual property developed as part of the employment relationship will belong to the company, subject to the employment agreement.

5 Required Experience and Skills

• Practical SQL, PostgreSQL and relational database design experience. Experience with Supabase or a comparable cloud backend platform. Web application development and API integration experience. Experience migrating data from Microsoft Access or similar legacy systems. Practical experience with AI-assisted or Vibe Coding tools such as Lovable, Cursor, Claude Code, GitHub Copilot or ChatGPT.
• Experience with authentication, permissions, testing, deployment and reporting. Strong business-process analysis, communication and user-training skills.
• Experience developing inventory, warehouse, asset-management, field-service, job-management or ERP-related solutions will be highly advantageous.

6 Portfolio Requirement

Applicants must present examples of systems they have personally developed or substantially contributed to. They should be able to explain their role, the tools and database architecture used, the challenges addressed, how the system was deployed and how users work with it. Where confidentiality prevents a live demonstration, the applicant should provide alternative evidence that clearly demonstrates their capability.

7 Personal Attributes

Self-driven, practical and solution orientated. Comfortable working independently and taking ownership of deliverables. Able to understand operational processes and translate them into working systems. Comfortable working with senior management and non-technical users. Detail orientated, organised and focused on implementation and completion. Able to work effectively as requirements evolve through user feedback.

8 Remuneration

The maximum salary is R50,000 per month, consisting of a fixed portion and a performance-based portion.

9 Initial 6 Month Priorities

Discovery and Architecture

Review the legacy system, current platform, data and operational priorities and finalise the architecture and delivery roadmap.

Legacy Migration

Build the replacement for the Microsoft Access solution and migrate the required information.

Core Modules

Complete the priority inventory, warehouse, asset and technical job functionality.

Testing and Rollout

Complete user acceptance testing, deploy approved modules and monitor adoption.

Training and Handover

Train users and administrators and complete the technical, operational and user documentation.

10 Success Measure

Success will be measured by the delivery of secure, reliable and documented operational systems that are implemented on time and used effectively by employees in their day-to-day work.