Freelance Backend Engineer (Python → Java | OCI | AI Applications)

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. ThreatXIntel is committed to ensuring that businesses of all sizes have access to top-notch cybersecurity services to safeguard their digital assets.

Role Description

reliable, delivery-oriented Freelance Backend Engineer

problem-solving mindset

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