• 🔭 Full-stack engineer at WellDev, working across the Rails API and React frontend of RMS — a multi-tenant Recruitment SaaS serving candidates across 5+ countries
• 🏗️ Comfortable end-to-end: API design, database performance, background job infrastructure, and the UI that ships on top of it
• 🧠 Strong algorithmic foundation — 300+ competitive programming contests, 3,200+ problems solved
• 🤖 Uses Claude Code, GitHub Copilot, and Cursor daily to move faster without cutting corners
• ✍️ Maintaining a free, open-source System Design tutorial in Bengali to make scalability concepts accessible to Bengali-speaking developers
• 📍 Based in Dhaka, Bangladesh

Feb 2026 – Present · Dhaka, Bangladesh (Hybrid)

• Engineered core reliability fixes for a multi-tenant recruitment SaaS, resolving a production Sidekiq outage that restored background job processing platform-wide
• Led a zero-downtime database migration (activerecord-multi-tenant → acts_as_tenant) across a Rails 8 multi-tenant architecture, using production-safe constraint validation
• Cut API response time 6x (3s → under 500ms) on a high-traffic activity-tracking endpoint used daily by recruiters
• Shipped a geolocation-based eligibility engine for job applications using IP-based geo lookups and indexed Postgres arrays
• Built and open-sourced queue_migration_audit, a Ruby gem for safely migrating Sidekiq → Solid Queue — CLI, 4 scanners, full test suite
• Closed out multiple CVE security triages (PostgreSQL JDBC, postgresql_anonymizer), ensuring zero exploitable risk
• Refactored the core API architecture (Grape entities) to unify business logic across job types
• Delivered a full-stack Reverse Interview Stage feature with concurrency-safe state transitions

Aug 2025 – Feb 2026 · Dhaka, Bangladesh (On-site)

• Engineered a feature-rich Job Portal with secure authentication, role-based access, and an AI-powered recommendation system leveraging Elasticsearch
• Designed recruiter and candidate workflows with real-time notifications, analytics dashboards, and AI tools such as automated resume parsing and an intelligent resume builder
• Built scalable RESTful APIs using Grape, automated background tasks with Sidekiq + Redis, and strengthened reliability through unit testing and secure file management

Apr 2025 – Jul 2025

• Diagnosed and resolved critical Admin Coupon bugs in a high-traffic WooCommerce SaaS product, improving reliability and unblocking merchant workflows
• Extended the Stripe subscription integration with developer-facing filter hooks, increasing configurability without touching core code
• Refined the store review time display UI after discussing UX trade-offs with the team

Sep 2019 – Jun 2025 · Part-time

• Trained junior developers in Data Structures, Algorithms, Dynamic Programming, and Graph Theory — building the next cohort of competitive programmers at RMSTU

Secure authentication, role-based access, AI resume parsing, ML-powered job recommendations, real-time notifications, and analytics dashboards.

Ruby on Rails TypeScript Redis Sidekiq PostgreSQL Elasticsearch Grape Tailwind CSS

React/Node.js app built for Dhaka North City Corporation (DNCC) to optimise waste-management routing, cost calculation, and reporting.

React TypeScript Express.js MongoDB Redux JWT

Open-source, progressively-structured guide to backend engineering and large-scale system design — client-server architecture, CDN, DNS, load balancing, API gateways, connection pooling, and reliability patterns — written for Bengali-speaking developers.

AI-assisted development: Claude Code · GitHub Copilot · Cursor

Practices: REST APIs · OOP/MVC · N+1 elimination · Query optimisation · Rapid prototyping

B.Sc. in Computer Science and Engineering

Rangamati Science and Technology University · Sept 2018 – May 2025 · GPA 3.70/4.00