Senior / Principal Software Engineer — Data Platform

Network Finance; Randburg; Hybrid; ZAR 700,000 - 1,000,000; Full time

Benefits offered by this job

Competitive package

Performance-based incentives

Medical aid and risk benefits

Professional development and cert.

Exposure to modern cloud tech

Hybrid working environment

Job summary

Network Finance seeks a seasoned web application developer in Johannesburg to design, build, and maintain internal business applications and portals. You will work with TypeScript, React, Node.js, SQL, and cloud integrations, building dashboards, reports, maps, and visualisations.

You will mentor junior developers, pursue best practices in testing, security, and CI/CD, and collaborate with business and technical teams to deliver scalable solutions in a hybrid work environment.

Qualifications

• Minimum 5 years' professional software development experience.
• Proven full-stack development experience.
• Experience building and supporting production web applications used by employees or customers.
• Experience working with modern JavaScript frameworks and cloud-based solutions.
• Experience mentoring junior developers would be advantageous.
• Exposure to operational systems, telecommunications, utilities, GIS/mapping solutions, or enterprise portals would be beneficial.

Responsibilities

• Design, develop, and maintain internal business applications and operational portals.
• Build responsive interfaces, dashboards, KPI reporting tools, maps, charts, and data visualisations.
• Deliver consistent, intuitive user experiences across multiple applications.
• Translate business requirements into practical technology solutions.
• Integrate applications with shared APIs and backend services.
• Ensure data displayed within applications accurately reflects underlying business systems.
• Validate and troubleshoot data using SQL and database queries.
• Collaborate with data and platform teams to support seamless integration.
• Develop applications that perform effectively across varying network conditions.
• Optimise user journeys and application responsiveness.
• Work directly with stakeholders to understand operational needs and improve usability.
• Communicate technical changes clearly to non-technical users.
• Participate in code reviews and maintain high development standards.
• Develop automated tests for application functionality and user interactions.
• Support structured release processes through development, testing, and production environments.
• Monitor performance and resolve issues through established support processes.
• Implement secure authentication and access controls.
• Ensure compliance with privacy and data protection requirements.
• Follow secure development practices and protect sensitive information.
• Manage application access and configuration securely.
• Work closely with technical and business teams to deliver solutions.
• Share knowledge and support less experienced developers where required.
• Contribute to continuous improvement initiatives and development standards.
• Participate in solution design and technical planning activities.

Skills

TypeScript

JavaScript

HTML5 CSS3

React

Node.js

SQL

PostgreSQL

REST APIs

Git/GitHub

Automated tests

CI/CD

Cloud hosting

Auth & IAM

Google Cloud Platform

Firebase

Next.js

Vue.js

Angular

C#

Java

Go

Rust

Education

Bachelor's degree in CS/IS/SE

Matric (Grade 12)

Cloud/web development certifications

Tools

Git

GitHub

CI/CD tooling

SQL tooling

Job description

Key Responsibilities

Web Application Development

• Design, develop, and maintain internal business applications and operational portals.
• Build responsive interfaces, dashboards, KPI reporting tools, maps, charts, and data visualisations.
• Deliver consistent, intuitive user experiences across multiple applications.
• Translate business requirements into practical technology solutions.

API & Data Integration

• Integrate applications with shared APIs and backend services.
• Ensure data displayed within applications accurately reflects underlying business systems.
• Validate and troubleshoot data using SQL and database queries.
• Collaborate with data and platform teams to support seamless integration.

User Experience & Performance

• Develop applications that perform effectively across varying network conditions.
• Optimise user journeys and application responsiveness.
• Work directly with stakeholders to understand operational needs and improve usability.
• Communicate technical changes clearly to non-technical users.

Quality Assurance & Release Management

• Participate in code reviews and maintain high development standards.
• Develop automated tests for application functionality and user interactions.
• Support structured release processes through development, testing, and production environments.
• Monitor performance and resolve issues through established support processes.

Security & Compliance

• Implement secure authentication and access controls.
• Ensure compliance with privacy and data protection requirements.
• Follow secure development practices and protect sensitive information.
• Manage application access and configuration securely.

Collaboration & Mentorship

• Work closely with technical and business teams to deliver solutions.
• Share knowledge and support less experienced developers where required.
• Contribute to continuous improvement initiatives and development standards.
• Participate in solution design and technical planning activities.

Minimum Requirements

Qualifications

• Matric (Grade 12).
• Bachelor's Degree in Computer Science, Information Systems, Software Engineering, or a related field, or equivalent practical experience.
• Relevant cloud or web development certifications will be advantageous.

Technical Skills

Strong experience with:

• TypeScript
• JavaScript
• HTML5 & CSS3
• React
• Node.js
• SQL
• PostgreSQL

Experience with:

• RESTful APIs
• Git and GitHub
• Automated testing frameworks
• CI/CD practices
• Cloud-hosted environments
• Authentication and access management solutions

Exposure to the following will be advantageous:

• Google Cloud Platform
• Firebase
• Cloud Run
• Next.js
• Vue.js
• Angular
• C#
• Java
• Go
• Rust

Experience Required

• Minimum 5 years' professional software development experience.
• Proven full-stack development experience.
• Experience building and supporting production web applications used by employees or customers.
• Experience working with modern JavaScript frameworks and cloud-based solutions.
• Experience mentoring junior developers would be advantageous.
• Exposure to operational systems, telecommunications, utilities, GIS/mapping solutions, or enterprise portals would be beneficial.

Key Competencies

• Strong problem-solving and analytical skills.
• Excellent communication and stakeholder engagement abilities.
• High attention to detail and commitment to quality.
• Strong ownership and accountability.
• Ability to work independently and collaboratively.
• Customer-focused mindset.
• Commitment to continuous improvement and best-practice development standards.

What’s On Offer

• Competitive market-related remuneration package.
• Performance-based incentives.
• Medical aid and risk benefits.
• Professional development and certification support.
• Exposure to modern cloud technologies and enterprise-scale systems.
• Hybrid working environment with flexibility and growth opportunities.

Working Environment

• Hybrid work model based in Johannesburg.
• Occasional travel may be required.
• Participation in major releases and occasional after-hours support when necessary.
• Collaborative and innovative technology environment focused on operational excellence.