Middle Java Engineer ( Freelancer)

About the Project:
Our client is developing an all-in-one treasury platform designed to simplify and automate foreign exchange (FX) processes for small and medium-sized enterprises (SMEs). Recognizing the growing trend of automated payment systems, the platform aims to eliminate intermediaries and empower businesses to focus on growth.

Location: UK
Form of Cooperation: Freelancer
English Level: Upper-Intermediate
Allocation: Part-time (6 hours per day, 3 days per week in April), transitioning to support in May, followed by active development of new functionality.

Requirements:

• 3+ years of experience with Java
• Strong understanding of Java Spring Boot for backend development
• Experience with Kafka for event-driven architecture
• Knowledge of RESTful APIs for integration with third-party financial tools (e.g., Xero)
• Familiarity with OAuth 2.0 / JWT authentication and authorization
• Understanding of end-to-end encryption for financial data protection
• Awareness of SOC 2 / GDPR compliance regulations

Technical Stack:

Backend:

• Java Spring Boot (scalable backend for handling financial transactions)
• Kafka (real-time event processing and automation)
• RESTful APIs (integration with financial platforms)

Infrastructure & Hosting:

• Kubernetes (K8s) for container orchestration and microservices deployment
• AWS / GCP / Azure (cloud hosting)
• Docker (containerization for easy deployment and scaling)

Security & Compliance:

• OAuth 2.0 / JWT for secure authentication
• End-to-End Encryption for transaction protection
• Compliance with SOC 2 / GDPR regulations

Event-Driven Architecture (Kafka):

• Ensures real-time transaction processing without system overload
• Enables horizontal scaling as demand grows

Microservices & Kubernetes:

• Independent, containerized services for easy scaling
• Seamless deployment of new features

Cloud-Based Auto-Scaling:

• Kubernetes auto-scaling based on traffic load
• Load balancing via NGINX / AWS ALB for increased transaction volume

Database Optimization:

• Partitioning & Indexing for large financial datasets
• Read replicas for better load distribution

Team Structure:

• Our Team: 1 Front-End Engineer
• Client Team: CTO

Project Roadmap:

• Current Stage: Final touches before launch
• May: Official launch and support phase
• Future: Active development of new features (details to be determined)

Hiring Process:

1. HR Interview
2. Technical Interview
3. Final Interview with Client

If you're an experienced Java Engineer looking for an exciting part-time freelance opportunity with a forward-thinking financial platform, we'd love to hear from you!