Muhammad Shahadul Haider

Remote · Bangladesh

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.

• Set the technical direction the team builds against — architecture, API design, and deployment strategy for the subsystems we ship — and review designs and code across the stack.
• Built and operate the release path every deploy goes through: metrics, logs, and alerting on a self-hosted observability stack, plus health-gated releases that roll back automatically on probe failure, so a bad deploy stops itself.
• Own core product subsystems end-to-end — from data model and API design through frontend delivery, rollout, and production monitoring.
• Ship platform features spanning multilingual search, rich-text editing surfaces, and document workflows on a multi-tenant product.
• Drive reliability and security hardening across the platform: tenant isolation, encryption at rest, and one centralized error-handling path for the API.
• Set up the frontend's lint, formatting, pre-commit and test tooling at project start, so conventions were enforced from the first commit rather than retrofitted — the suite now runs 370+ tests across backend and frontend on every change.

• Python 3.12
• FastAPI
• SQLAlchemy 2.0 async
• PostgreSQL 17
• Alembic
• Next.js 15
• React 19
• TypeScript
• Tiptap / ProseMirror
• TanStack Query
• Tailwind v4
• Docker
• Prometheus / Grafana / Loki / Alertmanager

San Francisco, CA · Remote

Architected a multi-tenant Kubernetes deployment service and a low-code data integration platform for orchestrated workflows.

• Architected a multi-tenant Kubernetes deployment service in Go, taking environment provisioning from hours to minutes.
• Developed a low-code data integration platform orchestrating automated pipelines and workflows — declarative configuration in place of hand-written glue code.
• Built the 40+ reusable component library new workflows composed from instead of writing custom code, processing 2M+ records daily.
• Designed a fault-tolerant state management system for long-running data workflows, keeping execution reliable across intermittent infrastructure failures.
• Implemented GDPR-compliant data privacy components protecting PII across 100k+ customer records with configurable anonymization strategies.
• Built agentic AI workflows using LangChain and LangGraph, integrated with vector databases for intelligent retrieval and reasoning pipelines.
• Designed data lineage and observability instrumentation for the workflow engine, surfacing execution paths, retry attempts, and failure boundaries to operators across multi-tenant deployments.

• Go
• Python
• FastAPI
• React
• Apache Airflow
• LangChain / LangGraph
• Docker
• Kubernetes / Helm
• Terraform
• GitHub Actions

Dallas, TX · Remote

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

• Architected an enterprise SAP data migration platform on a microservices backbone, moving 30 TB+ of client data with automated validation gates at every pipeline stage.
• Built the profiling gate that caught schema violations, duplicates, and referential errors across 50M+ records daily before they reached migration.
• Engineered ETL pipelines sustaining 2M+ records per hour, plus a validation framework that caught data-quality issues pre-cutover — cutting post-migration support tickets across 15+ enterprise clients.
• Developed a React analytics dashboard surfacing 200+ real-time migration KPIs, replacing slow manual reporting for client teams.
• Put migration rules in the hands of business analysts with a configurable schema-mapping engine, taking engineering out of the loop and roughly halving custom-code requests.
• Built connectors to multiple enterprise ERP/CRM systems with incremental sync, conflict resolution, and idempotent retries — supporting bi-directional data flow in production.

• Node.js
• Python
• FastAPI
• PySpark
• Apache Kafka
• MongoDB
• Redis
• Celery
• React
• Redux

Singapore · Remote

Built a crypto fund management dashboard, a multi-channel alert system, and a youth-focused social platform.

• Built a crypto fund management dashboard delivering real-time insights across 100+ cryptocurrencies, with automated risk analysis feeding fund managers' trading decisions.
• Shipped a multi-channel alert system (Twilio + SendGrid + Telegram APIs) delivering 50k+ notifications daily to 15k+ users.
• Architected and shipped a youth-focused social networking platform end-to-end; it grew to 20k+ users within three months of launch.

• Next.js
• React
• NestJS
• Serverless Stack (SST)
• AWS CDK / Amplify
• PostgreSQL
• MongoDB
• Terraform

Wilmington, DE · Remote

Shipped highly available Kubernetes deployments and serverless APIs serving 500k+ daily requests for a no-code platform.

• Implemented high-availability deployments for 12+ microservices on Kubernetes / GCP, cutting infrastructure cost by roughly a third.
• Developed 25+ serverless API endpoints on AWS Lambda and Google Cloud Functions processing 500k+ daily requests, including scraping pipelines extracting 2M+ product data points weekly.
• Optimized the React-based no-code website builder — cut page load time by more than half and resolved 40+ critical bugs.
• Engineered a medical-notes system with complex multi-level nested forms for healthcare clients, built on reusable form components.
• Automated student and mentor onboarding through 10+ third-party integrations (Airtable, Google Drive/Sheets/Calendar, Calendly, Typeform, SendGrid, Twilio).

• Node.js
• Express / NestJS
• React / Redux
• AWS Lambda
• Google Cloud Functions
• Kubernetes / GKE
• MongoDB
• Redis
• FFmpeg
• WebSockets
• PWA

Remote

Independent consulting building serverless applications, marketing tools, and JAMstack sites for SMB clients.

• Built serverless applications using AWS SAM (Lambda + DynamoDB + Cognito) and shipped to production for multiple SMB clients.
• Developed email marketing tools and a job-aggregator application with real-time features and integrations.
• Delivered high-performance JAMstack sites built on Gatsby and Next.js with headless CMS backends (Contentful, Strapi, Sanity).

• Next.js
• Gatsby
• React
• Node.js / NestJS
• GraphQL
• AWS (Lambda, DynamoDB, S3, Cognito, SAM)
• Google Cloud
• Stripe API
• Contentful / Sanity / Strapi
• Tailwind CSS

Dhaka · Bangladesh

First full-time engineering role — MERN stack applications, Django e-commerce solutions, and Python automation.

• Developed MERN stack applications and Django e-commerce solutions for domestic and international clients.
• Wrote Python automation scripts for data processing and database management across client workloads.

• MongoDB
• Express.js
• React
• Node.js
• Python
• Django