~ shahadulhaider/portfolio

Muhammad Shahadul Haider

Lead Engineer · Multi-tenant SaaS & developer tools · 10+ years of Python, Go, TypeScript

Software engineer with 10+ years in Python, Go, and TypeScript. Currently lead engineer on a multi-tenant SaaS platform and author of xpr-lang.

what i'm building

Featured projects

A cross-runtime expression language, and terminal-native developer tools.

A sandboxed expression language with near-byte-identical runtimes in TypeScript, Python, and Go.

stable oss

3 runtimes 601 conformance tests 71 built-ins

repo site Read more

Your API workbench lives in the terminal.

stable oss


        $ brew install shahadulhaider/tap/restless

repo Read more

what i've shipped

Platforms built for employers and their clients. Closed source, so these are write-ups rather than repositories.

Moving 30 TB of other people's business records into SAP without losing any of it.

work

A multi-tenant Kubernetes control plane and a low-code pipeline builder, shipped as one product.

work

Three most recent roles. The full timeline lives on the resume page.

Nov 2025 — Present

Lead Engineer · BengalByte

Lead engineer on a multi-tenant clinical SaaS platform — driving technical direction and end-to-end delivery of core subsystems across the Python / FastAPI backend and Next.js 15 / React 19 frontend.
Oct 2024 — Oct 2025

Senior Software Engineer · FlowGenX AI

Architected a multi-tenant Kubernetes deployment service and a low-code data integration platform for orchestrated workflows.
Oct 2023 — Sep 2024

Senior Full Stack Engineer · Cognitus

Built an enterprise SAP data migration platform and a real-time analytics dashboard for 15+ enterprise clients.