Kashan IlyasSenior Full Stack Engineer
PROFILE

Senior Full Stack Engineer with 5+ years building production web applications used by hundreds of thousands of users. Specializes in scalable real-time systems (Socket.io clustering, Redis pub/sub, WebRTC), AI-powered backends (RAG pipelines, LangChain, GPT-4, vector search), and modern React/Next.js frontends. Architected a real-time messaging platform sustaining 200K+ concurrent connections at sub-100ms message delivery, and cut API response times by 60%+ across multiple products. Track record of leading small teams and shipping on deadline.

SKILLS
JavaScript ES6+|TypeScript|React.js|Semantic search | Embeddings|Redux|Material UI|AWS|Microservices|vector database|LangChain|LLM|Next.js | Node.js | websockets|Redux Saga|GitHub|Vercel|FireStore|Express.js|Architecture|Ant Design|Tailwind CSS|HTML5 CSS5|MERN|MySQL|TON Telegram|NoSQL (MongoDB)|Bitbucket|Swagger|Ethers.js|Web3.js|mini apps
PROFESSIONAL EXPERIENCE

JAX-IT SOLUTIONS (pakistan)

Senior Full stack developer (React.js / Node.js / Next.js)
  • •Architected a real-time communication platform (Node.JS, Socket.io, Redis pub/sub) that scaled from 5K to 50K+users while holding p95 message delivery under 100ms; horizontal clustering across nodes cut single-node failure impact to under 2% of active sessions.
    • 08/2024 – 08/2026Remote Pakistan
  • •Added WebRTC audio/video and end-to-end encryption, plus WhatsApp-style cross-device session sync via MongoDB — reduced reconnect/sync time from ~8s to under 1.5s on device switch.
  • •Built a production AI assistant on a full RAG pipeline (Node.js/Express + LangChain over GPT-4, Pinecone retrieval over live news and historical price data) — cut average query response from 12s to 3.5s through streaming responses and embedding cache, with ~85% answer relevance in internal evaluation.
  • •Developed a high-throughput transactional platform with live market data over WebSocket (Node.js + PostgreSQL + Redis) — sustained 1K+ orders/minute at sub-50ms order-matching latency, up from ~800/min on the previous architecture.
  • •Built two real-time multiplayer prediction/wagering games (MERN) — grew to 1K+ monthly active users with 99.5% uptime over the launch quarter.

    • P1 Company Siblings Lab (South Korea)

    Full stack developer (React.js / Node.js / Next.js)
  • •Led a 4-engineer full-stack team building a competitive multiplayer gaming platform from architecture to launch — designed game mechanics, auction system, and reward flows; platform reached 5K+ registered users in the first 6 months.
    • 09/2022 – 07/2024Remote | South Korea
  • •Engineered an Electron.js desktop application for bulk asset generation with layered composition and automated metadata assignment — cut creator workflow from ~6 hours of manual work to under 10 minutes per collection.
  • •Built dynamic content platforms with automated 24-hour refresh pipelines — designed the data pipeline, API layer, and frontend rendering; eliminated ~20 hours/week of manual content updates.
  • •Developed Node.js automation bots for Discord and Telegram (alerts, broadcasts, cross-channel mirroring, gamified rewards) — served 30K+ community members and lifted daily active engagement ~40%.
  • •Built a Telegram Mini App with in-app games and an automated reward system — handled auth, game logic, and reward APIs end-to-end in Node.js; onboarded 5K+ users in the first month.

    • Macrosoft Pakistan ( Pakistan)

    Frontend Developer (React.js)
  • •Spearheaded the development and conversion of a legacy Visual FoxPro application into a modern React.js framework, enhancing functionality and user interface.
    • 05/2022 – 05/2023Remote | Pakistan
  • •Led the integration of APIs for a frontend built with TypeScript, improving data handling and Ul responsiveness.
  • •Utilized technologies including JavaScript, React.js, Chart.js, TypeScript, Redux Toolkit, HTML5, and Styled Components to deliver high-quality software solutions.

    • Emergent Software Solutions (Pakistan)

    Full Stack Engineer (React.js / Node.js)
  • •Built PCP, a car dealership management app with service tracking, appointment scheduling, history, and in-app chat (React.js, Redux, Material UI, Swagger-documented Node.js APIs) — adopted by 10+ dealership locations managing 1K+ service records/month
    • 06/2021 – 04/2022Onsite | Pakistan

    Agifly (Pakistan)

    Software Engineer (React.js/Node.js)
  • •Built a multilingual Belgian government web application for home renovation and energy cost estimation, serving 3 languages with centrally controlled pricing rules.
    • 03/2020 – 03/2021On-Site | Pakistan
  • •Designed and consumed REST APIs (Express.js, Sequelize, MySQL) — optimized calculator queries from ~2s to under 400ms through indexing and query restructuring.

    • SRB Technologies (Pakistan)

    LAMP Developer (PHP)
  • •Developed an internal CRM for a vehicle garage, which facilitates communication tracking and manages detailed records of vehicle maintenance services, including pricing and VAT calculations.
    • 01/2019 – 02/2020On-Site | Pakistan
  • •Created a car leasing website for a company, enabling users to easily find and lease vehicles.
    • EDUCATION & CREDENTIALS

    National University of Modern Languages, Islamabad (NUML)

    Bachelor of Computer Science (BSCS)
    2020