Senior Software Developer (Middleware Accounts Systems) at Sun International

Job Description

• The Senior Software Developer (Middleware Accounts Systems) is a hands-on technical specialist responsible for designing, building, and maintaining the backend services that power SunBet’s payment processing, financial transaction management, and gaming provider integrations.
• The role demands deep expertise in Node.js, strong database skills, and a thorough understanding of secure, high-availability systems in a regulated iGaming environment.
• This developer will own critical integration points, ensuring reliable fund flows, accurate transaction reconciliation, and seamless connectivity with game aggregators, payment gateways, and third-party financial services.

Core behavioural Technical / proficiency competencies:

• Backend Development (Node.js, NestJS, TypeScript, microservices)
• Database Engineering (SQL Server, schema design, query optimisation, stored procedures)
• Payment Systems & Financial Processing
• Integration Patterns (REST, SOAP, WebSockets, webhooks, message queues)
• Gaming Platform & Provider Integration
• Security & Compliance (PCI-DSS, AML, encryption, secure coding)
• Cloud & DevOps (Azure, CI/CD, Docker, containerisation)
• API Design & Documentation
• Transaction Management & Data Integrity
• Understanding of multi-jurisdictional regulatory requirements and multi-currency support\
• Problem-Solving & Analytical Thinking
• Collaboration & Communication
• Agile & Adaptable
• Customer-Centric Orientation
• Execution & Delivery Focus
• Attention to Detail & Rigour
• Innovation & Continuous Improvement

Job Requirements

Qualifications:

• Bachelor’s degree in computer science, Software Development, or a related field (required)
• Microsoft Certified: Azure Developer Associate or equivalent (advantageous)
• Master’s degree in computer science, Software Development, or a related field (advantageous)

Experience:

• 8+ years’ experience in backend software development with strong proficiency in TypeScript/JavaScript, and Node.js
• Proven experience building and maintaining payment processing systems, financial transaction engines, or similar high-integrity backend services
• Deep knowledge of SQL Server—schema design, stored procedures, query optimisation, indexing strategies, and transaction management
• Experience integrating with third-party APIs (payment gateways, game aggregators, KYC/AML providers) in production environments
• Solid understanding of RESTful API design, microservices architecture, and asynchronous messaging patterns (queues, event-driven systems)
• Working knowledge of CI/CD pipelines, containerisation (Docker), and cloud platforms (Azure preferred)
• Experience in iGaming, fintech, payments, or other regulated industries (preferred)
• Familiarity with PCI-DSS, AML/CFT, and data-privacy regulations applicable to online gambling
• Experience with NoSQL databases (e.g., CosmosDB, Redis) for caching and session management (advantageous)
• Strong experience with C# / .NET is advantageous