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Zeeshan Mumtaz

@zeeshanmumtaz

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Senior full-stack developer specializing in Node.js microservices and performance-optimized B2B SaaS backends.

Pakistan

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What I'm looking for

I’m looking to build secure, high-performance B2B SaaS with event-driven microservices, automated pipelines, and scalable cloud architecture—plus practical GenAI/LLM integration. I value ownership, mentoring, and measurable impact on latency, uptime, and developer productivity.

I’m a Senior full-stack developer with 7+ years building resilient B2B SaaS backends using Node.js, NestJS, and PostgreSQL. I focus on event-driven microservices, high-concurrency workloads, and performance optimization to reduce latency and operational overhead.

Most recently, I’m working as a Principal Software Engineer, fixing Docker build compatibility and delivering JWT-based authentication modules for an AI-powered SaaS platform. Previously, I led a team of 6 backend engineers for a high-traffic ratings application, cutting system latency by 30% through PostgreSQL query optimization and caching, and reducing manual interventions by 40% with automated AWS Step Functions pipelines.

I build production-grade systems that integrate Generative AI and LLM-driven workflows securely and scalably. I’m OCI Certified in AI and Generative AI, with experience in AI Foundations and data processing pipelines for real-world applications.

I thrive on end-to-end ownership—scaling infrastructure with AWS Lambda and RDS for 99.9% uptime, strengthening CI/CD with GitHub Actions, and delivering reliable APIs and real-time features with WebSockets and Socket.io. I enjoy mentoring, Agile/Scrum collaboration, and continuously optimizing system performance.

Experience

Work history, roles, and key accomplishments

Current

Principal Software Engineer

Current

Arbisoft

Mar 2026 - Present (2 months)

Resolved Python version compatibility issues in Docker configuration, restoring the containerized build pipeline for an internal HR system. Implemented a JWT-based authentication module for Joules AI, covering registration, login/logout, and password recovery flows.

Docker Python Version Compatibility JWT User Login Logout

Senior MERN Stack Engineer

Embrace It Technologies

Sep 2021 - Feb 2026 (4 years 5 months)

Architected and led a backend team of 6 for a high-traffic rating application using NestJS and Node.js. Reduced system latency by 30% through PostgreSQL query optimization and caching, and cut manual interventions by 40% using automated AWS Step Functions pipelines.

NestJS PostgreSQL Query Optimization Caching AWS Lambda AWS RDS AWS Step Functions

Software Engineer

Microagility Services

Oct 2020 - Sep 2021 (11 months)

Led rapid delivery of a job portal using the MEAN stack, earning Employee of the Month twice. Integrated Socket.io real-time notifications to improve user engagement by 25% and optimized database performance for high-concurrency traffic.

MongoDB Angular Socket.IO Concurrency

Software Engineer

NetSol Technologies

Mar 2019 - Oct 2020 (1 year 7 months)

Migrated a legacy finance system to a modern MEAN stack, reducing long-term maintenance costs by 30%. Engineered modular Angular components adopted by three international firms and resolved database versioning conflicts while preserving data integrity across distributed legacy systems.

MEAN stack MongoDB Angular Legacy System Migration Data Integrity

Software Engineer

Soft Solutions

Oct 2018 - Mar 2019 (5 months)

Developed responsive frontend architectures with Angular and Bootstrap, increasing mobile user retention by 20%. Built and secured RESTful APIs with MySQL to power high-reliability client websites.

Angular Bootstrap Responsive UI RESTful APIs MySQL API Security User Retention