Senior Java Developer (JHB Hybrid)

Datafin; Johannesburg; Hybrid; ZAR 900,000 - 1,200,000; Full time

Job summary

A dynamic IT solutions provider in Johannesburg seeks a Senior Java Developer to develop and maintain high-volume payment processing systems. Key responsibilities include designing solutions for account verification and integrating with banking systems. Ideal candidates must have advanced skills in Java Enterprise Edition, JPA, and RESTful API development. Strong communication skills are essential as well as the ability to mentor junior developers. Join a team that delivers cutting-edge solutions in a collaborative environment.

Qualifications

• Advanced proficiency in Java Enterprise Edition (JEE) and JPA.
• Strong experience with Reactive Java VM development.
• Expert level in RESTful API development.
• Comprehensive knowledge of Spring Framework.
• Expert in RESTful API development.
• Experience with Bankserv integration and payment processing systems.

Responsibilities

• Support and maintain internal projects and client systems.
• Develop Java applications with JPA persistence.
• Design payment file generation according to specifications.
• Design scalable solutions and contribute to architecture and modelling.
• Provide technical guidance to development teams.

Skills

Java Enterprise Edition (JEE)

JPA (Java Persistence API)

Reactive Java VM development

Spring Framework

RESTful API development

High-volume transaction processing

Payment gateway integrations

Client-facing experience

Tools

Oracle SOA Suite 12c

Web Services (SOAP/REST)

Job description

Senior Java Developer (JHB Hybrid)IT - Software Development

Johannesburg - Gauteng - South Africa

ENVIRONMENT

DEVELOP cutting-edge & scalable solutions for account verification, means testing, and payment reconciliation as the next Senior Java Developer sought by a dynamic provider of custom-driven IT Solutions & Consulting in Joburg. You will support and maintain the Internal Projects and at Clients where the systems process up to 15 million applications monthly, design and implement payment file generation according to Bankserv specifications while participating in solution architecture definition and modelling. The successful incumbent must have Advanced proficiency with Java Enterprise Edition (JEE), Reactive Java VM development and Bankserv integration experience (file formats, protocols) with a proven track record of working with Payment processing systems.

DUTIES

Core Development & Maintenance

• Support and maintain the Internal Projects and at Clients where the systems process up to 15 million applications monthly.
• Develop and enhance Java Enterprise Edition applications with JPA persistence.
• Build and maintain Reactive Java VM-based APIs for file processing and verification.
• Implement high-volume payment processing capabilities integrated with Bankserv.
• Develop solutions for account verification, means testing, and payment reconciliation.

Banking Platform Integration

• Design and implement payment file generation according to Bankserv specifications.
• Develop reconciliation processes for VET files and EF70 responses.
• Build account referral solutions integrating with commercial banks via Bankserv.
• Implement means testing file processing with multiple banking partners.
• Create audit transaction capabilities for all banking operations.

Solution Architecture & Design

• Participate in solution architecture definition and modelling.
• Assess current system architecture and recommend improvements.
• Develop functional and technical specifications.
• Design scalable solutions meeting business objectives.
• Provide technical guidance to development teams.

Career Development

• Skills transfer to CLIENT internal teams.
• Training delivery capabilities.
• Documentation and knowledge management.
• Mentoring Junior Developers.
• Technology innovation and research.

REQUIREMENTS

Core Java Technologies

• Java Enterprise Edition (JEE) - Advanced proficiency.
• JPA (Java Persistence API) - Expert level.
• Reactive Java VM development - Strong experience.
• Spring Framework - Comprehensive knowledge.
• RESTful API development - Expert level.

Integration Technologies

• Oracle SOA Suite 12c components: API Gateway management, SFTP/File transfer protocols, Web Services (SOAP/REST).

Banking & Financial Systems

• Bankserv integration experience (file formats, protocols.)
• Payment processing systems - Proven track record.
• Financial reconciliation processes.
• Account verification systems.
• Means testing implementations.

Required Banking Domain Knowledge

• High-volume transaction processing (250K+ transactions/month preferred).
• Payment gateway integrations.
• Bank account verification processes.
• Electronic Funds Transfer (EFT) systems.
• Cash send services implementation.
• Financial audit trails and compliance.

Specific Banking Integrations

• Experience with Bankserv Africa or similar payment processors.
• National Treasury web service integrations.
• Commercial bank APIs and file-based interfaces.
• Multi-bank payment reconciliation.

Architecture & Design

• Enterprise Integration Architecture design.
• Service Oriented Architecture (SOA) implementation.
• High-availability system design.
• Scalable application architecture.
• Security-first design principles.

Business Analysis

• Requirements gathering and analysis.
• Process mapping and optimization.
• Risk assessment and mitigation.
• Performance tuning and optimization.
• Change Management processes.

Compliance & Security

• Understanding of financial regulations.
• Data security and privacy principles.
• Audit trail implementation.
• Fraud prevention mechanisms.
• Government sector experience advantageous.

Project Experience

• Banking platform implementations.
• High-volume payment processing projects.
• Government or public sector experience preferred.
• Agile/SDLC methodology experience.
• 24/7 production support experience.

Performance Expectations

• 80-90% of service requests resolved at 1st Line support level.
• 2-hour Response time for critical issues.
• Continuous improvement and optimization initiatives.

ATTRIBUTES

• Strong problem-solving abilities.
• Excellent communication skills (English fluency required).
• Ability to work under pressure with critical systems.
• Team collaboration and mentoring capabilities.
• Client-facing experience preferred.