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Junior SQL Developer

Job in Johannesburg, 2000, South Africa
Listing for: iOCO Pty Ltd
Full Time position
Listed on 2026-02-21
Job specializations:
  • IT/Tech
    Database Administrator, Data Analyst, Data Engineer, Data Science Manager
Job Description & How to Apply Below

We’re looking for a Junior SQL Developer to support data-driven projects by building, maintaining, and optimising SQL queries and databases. This role is ideal for someone early in their data journey who’s eager to learn, enjoys problem-solving, and wants exposure to real-world enterprise environments.

You’ll work closely with senior developers, data engineers, and business stakeholders to support reporting, data integration, and operational systems.

What you'll do:
  • Write, test, and optimise SQL queries, views, and stored procedures
  • Support database development and maintenance across existing systems
  • Assist with data extraction, transformation, and loading (ETL) activities
  • Help troubleshoot data-related issues and performance bottlenecks
  • Work with business teams to understand reporting and data requirements
  • Support dashboard and reporting solutions where required
  • Maintain documentation for database objects and processes
  • Follow best practices around data quality, security, and version control
  • Collaborate with senior team members on ongoing projects and enhancements
Your Expertise:
  • Basic to intermediate SQL (joins, subqueries, aggregates, indexing fundamentals)
  • Exposure to relational databases (SQL Server preferred; MySQL / Postgre

    SQL acceptable)
  • Understanding of database concepts (tables, relationships, constraints)
  • Comfortable working with datasets and basic data analysis
  • Familiarity with Excel and/or basic BI tools is advantageous
  • Any exposure to ETL tools or scripting (Python / Power Shell) is a plus
  • Strong attention to detail and logical thinking
Qualifications:
  • Diploma or Degree in IT, Computer Science, Information Systems, or similar
  • Relevant certifications or online training in SQL / databases are beneficial
  • Graduate or junior‑level candidates welcome
Personal Attributes
  • Curious mindset and willingness to learn
  • Strong problem‑solving ability
  • Good communication skills
  • Able to work independently and within a team
  • Organised and comfortable working in structured environments
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