Freelance Backend Engineer

About the job

Company Description ThreatXIntel is a dynamic cybersecurity startup dedicated to protecting businesses and organizations from cyber threats. We specialize in providing tailored and cost-effective solutions in areas such as cloud security, web and mobile security testing, DevSecOps, and more. Our team of experts employs a proactive approach, identifying vulnerabilities before they can be exploited. By continuously monitoring and assessing digital environments, we aim to give our clients peace of mind, allowing them to focus on their growth. **Role Description** We are looking for a reliable, delivery-oriented Freelance Backend Engineer with strong Java backend expertise, solid Python understanding, and hands-on experience building AI-driven, chat-style applications (similar to OpenAI / ChatGPT architectures). The ideal candidate has a problem-solving mindset, can independently own backend deliverables, and is comfortable working in Oracle Cloud Infrastructure (OCI) environments. **Key Responsibilities** • Migrate existing backend services from Python to Java while preserving functionality and performance • Design, develop, and enhance Java-based backend services, with the ability to tweak and maintain Python components when required • Build backend systems supporting chat-based AI applications (conversation flows, APIs, session handling, orchestration) • Integrate AI components and frameworks (e.g., MCP, LLM integrations, inference APIs) • Design scalable and maintainable system architectures for distributed backend services • Develop and maintain REST APIs for frontend and AI service consumption • Write unit tests and integration tests to ensure reliability and production readiness • Deploy and operate services on Oracle Cloud Infrastructure (OCI) • Collaborate closely with stakeholders to ensure on-time, high-quality delivery **Required Skills & Experience** • Strong hands-on experience in Java backend development • Good working knowledge of Python, with the ability to modify and maintain Python codebases • Proven experience with Python → Java migration projects • Experience building or supporting chat-based or conversational AI applications • Hands-on exposure to AI / LLM integrations (MCP or similar frameworks preferred) • Experience working on Oracle Cloud Infrastructure (OCI) • Solid understanding of system design, scalability, and backend architecture • Strong experience in unit testing and integration testing • Familiarity with REST APIs, microservices, and cloud-native patterns **What We’re Looking For** • Delivery-oriented mindset – focuses on outcomes, not just code • Strong problem-solving and debugging skills • Ability to work independently with minimal supervision • Reliable, accountable, and able to meet deadlines • Comfortable owning backend components end-to-end.

Requirements

• Java backend development
• Python
• AI-driven applications
• Oracle Cloud Infrastructure
• REST APIs
• microservices

Preferred Technologies

• Java backend development
• Python
• AI-driven applications
• Oracle Cloud Infrastructure
• REST APIs
• microservices

About the company

ThreatXIntel is a dynamic cybersecurity startup dedicated to protecting businesses and organizations from cyber threats, providing tailored, cost-effective solutions for various cybersecurity needs.