Net2Source (N2S)
Backend Java Developer
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Backend Java Developer
Backend Java Developer – FTE (12 Months) – 3 Days Office-Based (Belfast)
About the Role
Responsible for designing, developing, and maintaining high-performance backend systems. This role focuses on supporting low-latency trading infrastructure and financial domain applications using Java/NIO and associated technologies.
Key Responsibilities
- Develop low-latency Java applications leveraging NIO (Channels, Buffers, Selectors)
- Implement FIX-protocol integrations and market connectivity with strict SLAs
- Build Spring Boot-based microservices with best practices in messaging and scalability
- Engage with JMS/MQ, EMS, or Kafka middleware for event-driven systems
- Design and query RDBMS systems (Oracle, Sybase, MS SQL) for performance-critical data needs
- Contribute to cloud-native development with microservices, containerization (Docker/Kubernetes)
- Follow TDD (Test-Driven Development) and industry standards
- Write and refine Linux/Unix scripts for automation and orchestration
- Collaborate in Agile cycles with CI/CD pipelines
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Requirements
Technical Experience & Expertise
✅ Java development (core + advanced NIO components) ✅ Spring Boot microservices architecture (for performance and scalability) ✅ Experience with: FIX-protocols, low-latency Java, market data workflows ✅ Middleware exposure: JMS/MQ/EMS or Kafka for pub/sub messaging ✅ Cloud-native development:
- Microservices design
- Containerization (Docker, Kubernetes) ✅ RDBMS proficiency (query optimization), Oracle, Sybase, MS SQL ✅ Scripting knowledge (Linux/Unix Bash, PowerShell) ✅ CI/CD tooling, Agile lifecycle, testing (unit/integration) ✅ Basic MS Office (PowerPoint, Excel) for documentation & reporting
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Certifications & Qualifications
📜 Qualifications:
- Bachelor’s degree in computing/copropagating degree (or equivalent industry experience)
- Experience banking/financial services domain preferred
Soft Skills
🔹 Exceptional analytical, problem-solving and communication (internal/external) 🔹 Proven ability to take ownership of tasks across complex projects 🔹 Highly self-motivated, adaptable, with a troubleshooting mindset 🔹 Multitasking and collaborative teamwork skills
Desirable Attributes (Bonus)
✔ Deep passion for quant/algo trading, markets and microarchitecture ✔ Familiarity with security compliance (data protection, PCI DSS)
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