Freelance Backend Engineer

About the job

ThreatXIntel is a cyber security startup dedicated to safeguarding businesses and organizations from digital threats. Specializing in services such as cloud security, web & mobile security testing, and DevSecOps, the company provides tailored and affordable solutions to meet diverse client needs. With a proactive approach, ThreatXIntel continuously monitors and tests digital environments to identify and address vulnerabilities before exploitation occurs. 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). 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 / LLM components using MCP or similar AI integration frameworks • 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 • Experience performing Python-to-Java migrations • Hands-on experience building chat-based or AI-driven applications • Experience integrating AI / LLM systems (MCP or similar orchestration / inference frameworks) • Strong understanding of system design, microservices, and distributed systems • Experience with unit testing and integration testing • Hands-on experience with Oracle Cloud Infrastructure (OCI) • Strong problem-solving skills and ownership mindset Nice to Have • Experience with LLM inference, prompt orchestration, or agent-based systems • Exposure to containerization and CI / CD pipelines • Experience building scalable, high-availability backend platforms

Requirements

• Java
• Python
• AI-driven applications
• Oracle Cloud Infrastructure

Preferred Technologies

• Java
• Python
• AI-driven applications
• Oracle Cloud Infrastructure

About the company

ThreatXIntel is a cyber security startup dedicated to safeguarding businesses and organizations from digital threats. Specializing in services such as cloud security, web & mobile security testing, and DevSecOps, the company provides tailored and affordable solutions to meet diverse client needs.