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Shahadul HaiderSH
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Shahadul Haider

@shahadulhaider

Lead Engineer at BengalByte building a multi-tenant SaaS platform, including multilingual search across hundreds of thousands of clinical records.

Bangladesh
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At BengalByte, I set technical direction for a multi-tenant SaaS platform and own core systems from data models through production rollout. I built its release path with a 370+ test suite, self-hosted observability, and health-gated deployments that roll back automatically when probes fail.

I also built multilingual search across hundreds of thousands of clinical records, alongside an in-app notifications system and safeguards for cross-tenant access. I replatformed the rich-text editor and migrated 100k+ existing records with zero errors using an online, reversible migration.

At FlowGenX AI, I architected a multi-tenant Kubernetes deployment service in Go that took environment provisioning from hours to minutes. I also developed workflow and data-integration systems, including reusable components that processed 2M+ records daily.

Outside my company work, I authored xpr-lang, a sandboxed expression language with near-byte-identical implementations in TypeScript, Python, and Go, shipped to npm, PyPI, and Go modules. I also built terminal tools for API work and environment-file validation.

Experience

Work history, roles, and key accomplishments

RE

Software Engineer

re:cruit

May 2021 - Jun 2022 (1 year 1 month)

Ran high-availability Kubernetes deployments for 12+ microservices on GCP and shipped 25+ serverless API endpoints on AWS Lambda and GCF processing 500k+ daily requests. Cut page load time on a React no-code site builder by more than half and automated onboarding through 10+ third-party integrations.

FR

Freelance Software Engineer

Freelance

Sep 2018 - Apr 2021 (2 years 7 months)

Provided independent consulting across serverless apps on AWS SAM, JAMstack sites on Gatsby and Next.js with headless CMS, and email marketing tooling with real-time features.

DS

Software Engineer

Digitally Simplex

Feb 2016 - Aug 2018 (2 years 6 months)

First full-time engineering role; built MERN stack apps and Django e-commerce solutions for international clients.

Education

Degrees, certifications, and relevant coursework

University of Dhaka logoUD

University of Dhaka

B.S., Computer Science and Engineering

2013 - 2017

Pursued a Bachelor of Science in Computer Science and Engineering, focusing on core computer science and engineering principles.

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