Tayyab Khalid .

Senior Backend Engineer with 5+ years of experience building production-grade web applications across backend and frontend using Python, TypeScript, React, Node.js, PostgreSQL, and cloud-native technologies. Experienced delivering RESTful APIs, scalable multitenant SaaS platforms, distributed systems, AI-powered applications, and GCP deployments (Cloud Run, Cloud SQL). Hands-on experience with Google Ads API, Meta Ads API, GA4, Search Console API, OAuth 2.0, LangChain, LangGraph, MCP, prompt engineering, tool calling, Docker, Kubernetes, and CI/CD.

Senior Software Development Engineer - Codefinity Solutions

(2026-01)

• Led end-to-end backend architecture using Python, TypeScript, Node.js and PostgreSQL, delivering scalable multi-tenant SaaS features and improving platform reliability.
• Built AI-powered workflows using LangChain, LangGraph, MCP, prompt engineering and tool calling to automate business processes.
• Deployed production services on Google Cloud Run with Cloud SQL, Docker and CI/CD pipelines, improving deployment efficiency and system availability.
• Integrated Google Ads API, Meta Ads API, GA4 and OAuth 2.0 for secure marketing analytics integrations.

Senior Backend Engineer - Renesis Tech

(2024-10 - 2025-12)

• Built scalable RESTful APIs and distributed microservices serving 10,000+ concurrent users.
• Optimized PostgreSQL data models and SQL queries reducing latency by 35%.
• Developed React-integrated backend services and deployed cloud-native workloads using Kubernetes and Docker.

Senior Full-Stack Engineer - Senew Tech

(2023-03 - 2024-09)

• Delivered backend infrastructure and React features for multi-tenant SaaS products.
• Implemented GraphQL and REST APIs improving throughput by 35%.
• Reduced production defects by 50% through testing, reviews and CI/CD.

Backend Developer - Wanological Solutions

(2022-01 - 2023-03)

• Engineered REST APIs, PostgreSQL schemas and Redis caching for client applications.
• Improved API performance by 40% via SQL optimization and connection pooling.

Associate Backend Developer - Vvork Cloud Technologies

(2020-09 - 2021-12)

• Developed backend services using Node.js, Python and PostgreSQL delivering end-to-end client projects.
• Enhanced API performance by 40% through query optimization and caching.

Bachelor of Science - Computer Science - Virtual University of Pakistan