Freelance Backend Engineer

2 weeks ago

lucknow, India ThreatXIntel Full time

Company DescriptionThreatXIntel 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 DescriptionWe 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 ResponsibilitiesMigrate existing backend services from Python to Java while preserving functionality and performanceDesign, develop, and enhance Java-based backend services, with the ability to tweak and maintain Python components when requiredBuild 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 servicesDevelop and maintain REST APIs for frontend and AI service consumptionWrite unit tests and integration tests to ensure reliability and production readinessDeploy and operate services on Oracle Cloud Infrastructure (OCI)Collaborate closely with stakeholders to ensure on-time, high-quality deliveryRequired Skills & ExperienceStrong hands-on experience in Java backend developmentGood working knowledge of Python, with the ability to modify and maintain Python codebasesProven experience with Python → Java migration projectsExperience building or supporting chat-based or conversational AI applicationsHands-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 architectureStrong experience in unit testing and integration testingFamiliarity with REST APIs, microservices, and cloud-native patternsWhat We're Looking ForDelivery-oriented mindset – focuses on outcomes, not just codeStrong problem-solving and debugging skillsAbility to work independently with minimal supervisionReliable, accountable, and able to meet deadlinesComfortable owning backend components end-to-end

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