Your go-to engineer for Backend works
I build robust, high-performance backend systems, distributed background workers, and scalable full-stack web applications with modern architectures.
Discover what I've created
A selection of web applications, scalable backends, and developer tools built with a focus on speed and craftsmanship.
OpenVett
OpenVett is an enterprise AI-powered hiring and technical assessment platform for generating, delivering, scoring, and managing candidate evaluations. Key Capabilities: • AI assessment generation: Creates customized, role-specific tests from job descriptions and skill requirements across Technical, Reasoning, and Problem-Solving tracks. • Timed candidate exam portal: Candidate-facing secure test sessions with timers, progress tracking, and fraud prevention controls. • Automated AI evaluation: Intelligent grading with skill breakdowns, strength/weakness matrices, and hiring recommendations. • Admin dashboard: End-to-end management of jobs, candidate pipelines, question banks, and audit logging. • Infrastructure & Ingress: Self-hosted Docker Compose stack with automatic GPU/CPU Ollama model selection (Gemma3), PostgreSQL + pgvector, Redis + ARQ workers, and Cloudflare Tunnel prod ingress.
CodeOwl
Full-stack coding-activity tracking platform that ingests heartbeat telemetry from code editors, computes real-time daily programming metrics, and surfaces high-density analytics dashboards. Key Capabilities: • Custom VS Code Extension: Built a dedicated VS Code VSIX extension ingesting typing and save events with debounced batching. • Zed Editor LSP Bridge: Engineered a custom stdio Language Server Protocol (codeowl-ls) binary bridging Zed editor sessions to the CodeOwl ingestion server. • Edge Runtime Hardening: Designed edge-safe session verification inspecting auth cookies directly to prevent TCP socket lockups in Next.js 15 App Router middleware. • Resilient Ingestion: Rate-limited API ingestion endpoint with daily and weekly metrics rollups, language distribution charts, and project timelines.
Findea Backend
Production backend engineered for a multi-tenant fashion e-commerce platform with clean architecture and strict type safety. Key Capabilities: • Modular Architecture: Built using NestJS 10, TypeScript, Prisma, and PostgreSQL with full multi-role JWT authentication (Admin, Boutique Vendor, Customer). • Inventory & Stock Restoration: Atomic inventory management restoring variant stock and parent aggregate levels on order cancellations. • Flutterwave Payments: Idempotent payment handling with webhook signature verification, transaction auditing, and double-spend protection. • Asynchronous Workers: BullMQ and Redis queues handling order expiration, abandoned checkout cleanup, and transactional notifications via Nodemailer. • Deployment: Production Docker Compose on VPS with health checks, seed compilation, and automated deployment script.
A little about who I am
I'm a full-stack TypeScript & backend engineer based in Bangladesh. I build clean, high-performance web products, micro-SaaS applications, and reliable API services.
My philosophy centers around clarity, performance, and boring, shippable solutions. I value clean relational data modeling, robust background worker queues, and snappy client interactions over unnecessary complexity.
When I'm not writing code, I explore local developer communities, study distributed systems, and build developer productivity tools.
Full-Stack Core
Next.js App Router, React, Tailwind CSS, TypeScript strict mode.
Data Architecture
PostgreSQL, Prisma, transaction integrity, Redis background queues.
AI Integration
Anthropic Claude API, OpenAI, Ollama for local offline inference.
Developer Tooling
CLI utilities, Chrome extensions, Docker containers, automated tests.
Tools & technologies I work with
Languages, frameworks, databases, and DevOps tools I use to take ideas to production.
Languages
6 toolsBackend & APIs
6 toolsDatabases & Caching
6 toolsDevOps & Infrastructure
6 toolsFrontend
3 toolsMobile & AI
3 toolsMy professional journey
A timeline of engineering roles, open source contributions, and education.
Backend Web Developer
Crebyte
- Developed and maintained scalable backend services and RESTful APIs using NestJS, TypeScript, and Prisma.
- Engineered inventory and stock restoration logic ensuring atomic consistency during order cancellations.
- Integrated Flutterwave payment gateway with webhook signature verification, transaction logging, and idempotent processing.
- Implemented background job processing using BullMQ and Redis for scheduled task execution and notifications.
- Deployed and managed containerized services on cloud VPS environments using Docker Compose.
Web Developer
ESAB-AIUB Unit Face
- Architect and develop scalable web solutions for campus club management and member workflows.
- Build and maintain the Campus Club Management Portal using NestJS, Next.js, PostgreSQL, and TypeORM.
- Implement role-based access control, event scheduling, onboarding approvals, and administrative dashboards.
- Manage automated deployments and CI/CD pipelines across development and production environments.
Technical Support Engineer
Renessoft
- Diagnosed and resolved software defects, network glitches, and database bottlenecks in live client environments.
- Monitored high-volume call center telephony and routing systems to guarantee 99.9% uptime and reliability.
- Analyzed operational telemetry and generated incident response reports to identify recurring systemic errors.
- Collaborated directly with core engineering teams to streamline troubleshooting protocols and deployment reliability.
Independent Developer & Open Source Contributor
SquareAtom / Independent
- Built offline-first consumer mobile applications (Finbit, Momentum) using Flutter, Riverpod, and Drift SQLite.
- Configured self-hosted Dockerized GitHub Actions runners for automated Play Store release pipelines.
- Developed full-stack micro-SaaS tools, RESTful API integrations, and developer tooling (Zed LSP bridges, VS Code extensions).
- Contributed actively to open-source codebases, documentation, and tooling workflows on GitHub.
Shopify Developer Trainee
ATZ Technology LTD.
- Built and customized client Shopify stores using Liquid, HTML5, CSS3, and modern JavaScript.
- Developed responsive user interfaces and optimized product collection pages for mobile performance.
- Integrated third-party Shopify apps, payment gateways, and tracking pixels.
- Conducted cross-browser compatibility testing and resolved frontend display discrepancies.
BSc. in Computer Science & Engineering
American International University-Bangladesh (AIUB)
Focus on Algorithms, Data Structures, Operating Systems, Database Management Systems, Software Architecture, and Distributed Systems.
Latest thoughts & articles
Writings on full-stack architecture, backend optimizations, and software engineering.
Frequently asked questions
Answers to questions about working together, project scope, tech stack, and engineering practices.
Let's discuss your next project
Have an idea, need engineering consulting, or looking to scale your web application? Send a note and let's talk.