Java Developer (Senior)

ATS Client; Johannesburg; On-site; ZAR 900,000 - 1,300,000; Full time

Job summary

Khonology in Johannesburg is seeking a Senior Java Developer to own backend services and contribute across the full stack, including front-end work with modern frameworks.

You will design APIs, work with cloud platforms, mentoring teams, implement CI/CD, and stay ahead of tech trends to deliver scalable, robust systems.

Applicants should bring 8+ years of experience, proficiency in Java, RESTful APIs, HTML/CSS/JS, and databases such as PostgreSQL or MySQL.

Qualifications

• 8+ years of experience in software development.
• Proven experience as a Full Stack Developer or similar role.
• Proficiency in front-end languages (HTML, CSS, JavaScript) and frameworks.
• Strong back-end development skills with experience in RESTful APIs.

Responsibilities

• Build robust back-end services and APIs using Java, or similar technologies.
• Develop and maintain responsive web applications using modern front-end frameworks (e.g. React).
• Design and manage relational and NoSQL databases (e.g., PostgreSQL, MySQL).
• Collaborate with cross-functional teams to define, design, and ship new features.
• Write clean, maintainable, and testable code.
• Implement CI/CD pipelines and deploy applications to cloud platforms (e.g., AWS, Azure).
• Troubleshoot, debug, and upgrade existing systems.
• Stay up to date with emerging technologies and industry trends.

Skills

Java

REST APIs

Full stack dev

Frontend React

CI/CD

Cloud (AWS/Azure)

PostgreSQL

MySQL

NoSQL

Job description

Khonology is a digital services and technology engineering company. Our teams build modern, scalable, and resilient solutions that enable our clients to operate, innovate, and grow.

The Senior Java Developer plays a critical role in delivering complex enterprise systems. This role spans the full technology stack combining deep expertise in back‑end Java development with strong capability across front‑end frameworks, APIs, integrations, cloud services, and modern engineering practices. Senior developers at Khonology are expected not only to build high‑quality software but also to guide solution design, lead technical decision‑making, mentor engineering teams, and ensure that systems are robust, secure, and built for scale.

Key Responsibilities

• Build robust back‑end services and APIs using Java, or similar technologies.
• Develop and maintain responsive web applications using modern front‑end frameworks (e.g. React).
• Design and manage relational and NoSQL databases (e.g., PostgreSQL, MySQL).
• Collaborate with cross‑functional teams to define, design, and ship new features.
• Write clean, maintainable, and testable code.
• Implement CI/CD pipelines and deploy applications to cloud platforms (e.g., AWS, Azure).
• Troubleshoot, debug, and upgrade existing systems.
• Stay up to date with emerging technologies and industry trends.

Required Skills & Experience

• 8 years+ experience
• Proven experience as a Full Stack Developer or similar role.
• Proficiency in front‑end languages (HTML, CSS, JavaScript) and frameworks.
• Strong back‑end development skills with experience in RESTful APIs.