👋 Hello, I'm

Md Ishtiaque Sayeed Khan

Software Engineer | AI/LLM & Backend Specialist

Software engineer with 7+ years of experience building robust backend systems and AI-powered solutions. Specialized in LLM integration, microservices architecture, and team leadership. Passionate about leveraging AI to solve complex problems and building tools that enhance developer productivity.

With 7+ years in software development, I specialize in applying design patterns and best practices to build optimized, maintainable systems. I believe in balancing perfection with pragmatism—delivering solutions that are both technically excellent and practical for real-world constraints.

When I'm not coding, you can find me playing Counter Strike or Valorant, watching or playing soccer, or participating in airsoft and survival games.

Japan Map
Tokyo, Japan

Core Strengths

What I Bring to the Table

🤖

AI/LLM Expertise

Deep experience with Claude AI, LangChain, RAG, and agentic workflows for production systems

    ⚙️

    Backend Architecture & Microservices

    Production-grade systems from design to deployment

      💻

      Full-Stack Development

      End-to-end product delivery capability

        👥

        Technical Consulting & Team Leadership

        Drive projects from 0 to 1 with expert guidance

          🚀

          Test Automation & Tooling

          Build tools that reduce manual effort and boost productivity

            📊

            Data Analysis & Machine Learning

            Extract insights and build intelligent systems

              Available for freelance development and technical consulting projects

              Hire Me for DevelopmentBook a Consultation

              Skills & Technologies

              Technologies and tools I work with to bring ideas to life

              Programming Languages

              Python
              GoLang
              Swift
              PHP
              JavaScript
              SQL

              Frameworks & Libraries

              Django
              Flutter
              FastAPI
              Flask
              Claude AI
              LangChain
              LangGraph
              RAG (Retrieval-Augmented Generation)
              ChromaDB
              OpenAI API
              Ollama
              Scikit-learn
              HDBSCAN
              Random Forest

              Tools & Platforms

              PostgreSQL
              MySQL
              Docker
              Git
              Splunk
              Grafana
              Prometheus
              AWS
              JIRA

              Leadership & Management

              Team Leadership
              Requirements Analysis
              Technical Documentation
              Cross-functional Collaboration

              Leadership & Management

              Proven track record of leading teams and delivering results

              5-10
              Team Size Managed
              10+
              Projects Led
              100%
              On-Time Delivery

              Team Leadership

              Lead and manage teams of QE engineers and developers

                Project Management

                Plan, execute, and deliver complex technical projects

                  Stakeholder Communication

                  Bridge technical and business teams effectively

                    Strategic Planning

                    Design automation strategies and technical roadmaps

                      Knowledge Sharing

                      Create documentation and enable team growth

                        Innovation & Tooling

                        Drive adoption of new technologies and tools

                          Featured Projects

                          A selection of projects I've worked on recently

                          Work Experience

                          My professional journey and key achievements

                          Software Engineer

                          Cognizant (Apple Vendor)

                          Sep 2022 - Present

                          Leading development of AI-powered tools and backend systems for Apple's testing infrastructure

                          Architected and deployed LLM-driven log analysis platform reducing manual triage time by 70%
                          Developed GoLang microservice for dynamic test script generation serving 100+ test pipelines
                          Built Python LLM agents using Claude AI and RAG for automated error pattern recognition
                          Led team of QE engineers, managing requirements analysis and stakeholder communication
                          Created Splunk dashboards and Python tools for performance trend analysis and reliability assessment
                          Developed Swift testing frameworks for IOT and media platforms with device provisioning automation
                          PythonGoLangSwiftClaude AILangChainLangGraphRAGPostgreSQLDockerSplunkPrometheusGrafana

                          Software Engineer

                          Intelligent Business Systems

                          Jan 2021 - Sep 2022

                          Full-stack development of mobile and web applications

                          Developed and maintained Flutter applications for iOS and Android platforms
                          Built PHP web applications and REST APIs for mobile app backends
                          Implemented efficient database designs and backend architectures
                          Collaborated with cross-functional teams to deliver client projects on time
                          FlutterPHPMySQLREST APIiOSAndroid

                          Junior Software Engineer

                          CodeSmith Tech

                          Sep 2018 - Nov 2020

                          Backend development and database architecture

                          Developed and maintained Django web applications with complex business logic
                          Designed optimized database schemas for high-traffic applications
                          Implemented RESTful APIs and backend services
                          Optimized database queries improving application performance by 40%
                          PythonDjangoPostgreSQLMySQLREST API

                          Let's Connect

                          Get in Touch

                          rafeengunner@gmail.com

                          Or reach out through social media

                          I'm always interested in hearing about new opportunities, collaborations, or just chatting about technology. Feel free to reach out!