Available for freelance projects

Hi, I'm Efazul Karim

Building scalable full-stack systems and automation-driven products for real-world businesses.

Schedule a Meeting View Projects

const developer = {

focus: [

'Full-stack systems','Automation & AI pipelines','Cross-platform mobile apps','Scalable APIs & data platforms'

stack: [

'Next.js / React','React Native','Node.js & .NET','Python / FastAPI','PostgreSQL'

principle: 'Build reliable systems that turn complex business workflows into production-ready software',

}

About Me

The developer behind the code

A bit about who I am, what I build, and the tools I reach for.

Available for hire

~/efaz

Kazi Efazul Karim

Software Engineer

My Journey

I build full-stack web apps, mobile apps, backend systems, and AI-assisted tools that save time and scale reliably. Specializing in React, Next.js, React Native, Python, Node.js, and Docker across frontend, backend, mobile, and automation.

I work end-to-end — React, Next.js and TypeScript on the front, React Native for cross-platform mobile, and robust APIs, microservices and databases with Node.js and Python behind them. I care about clean, maintainable code and interfaces that feel effortless on every platform.

// currently working with

ReactNext.jsReact NativePythonNode.jsDocker

Years building

Projects shipped

Technologies

View Resume Contact

Skills & Expertise

Technologies and tools I use to build scalable backend systems and automation workflows.

Frontend

React, Next.js, TypeScript
Tailwind CSS, Framer Motion
Responsive UI, Accessibility

Backend

Python, Node.js
REST APIs, Webhooks
Authentication, Background jobs

Mobile Apps

React Native, Expo
Cross-platform iOS & Android
Native modules, Push notifications

DevOps / Infra

Docker, VPS, Github Actions
CI/CD
Monitoring & Logging

Automation & AI

n8n / custom pipelines
LLM APIs (GLM, OpenAI-like)
Automation Bots
Document & Report Automation

Work History

Professional Experience

A showcase of my professional journey and the skills I've developed along the way.

Senior Full-stack Product Developer

Full-time

Apr 2022 - Present

Fasten Teams(Formerly BitSic)•

Remote

Building frontend, backend, mobile, and AI software for founders. Solving business problems with full-stack systems and workflows.

ReactReact NativeNext.jsTypeScriptNode.jsPythonDjangoExpress.jsMySQLPostgreSQLMongoDBREST APIGraphQLSoftware DesignObject-Relational Mapping (ORM)Tailwind CSSDockerAWS

Full Stack Developer

Contract

Jun 2024 - Jan 2026

Fionetix•

Remote

Developing full-stack applications with focus on modern web technologies, mobile app development, and scalable backend solutions.

ReactReact NativeNext.jsTypeScriptNode.jsPythonExpress.jsMySQLPostgreSQLSoftware DesignTailwind CSSREST APIGitDocker

Freelance Developer & Consultant

Contract

Jan 2020 - Mar 2022

Self-employed•

Remote

Provided end-to-end web and mobile development services for diverse clients across multiple industries. Built custom software solutions, e-commerce platforms, and business applications with focus on scalability and user experience.

ReactNext.jsReact NativeTypeScriptNode.jsPythonDjangoExpress.jsPostgreSQLMongoDBREST APITailwind CSSGitProject ManagementClient CommunicationTechnical Consulting

Academic Journey

Education & Certifications

My academic journey and continuous learning path that has shaped my professional skills.

Bachelor of Science - BSc, Computer Science and Engineering

Southeast University

Dhaka, Bangladesh

Completed rigorous coursework in algorithms, data structures, and software engineering. Demonstrated strong problem-solving skills through competitive programming and academic projects.

Full Stack Development, Computer Science

freeCodeCamp

Online

Gained hands-on experience in full-stack web development, completing over 300 hours of coding challenges and building 5+ comprehensive projects. Mastered modern web technologies including React, Node.js, and database management.

Featured Projects

Here are some projects I've worked on that showcase my skills and approach to problem-solving.

Project

Completed

Education Management System

A comprehensive SaaS platform for educational institutions designed to streamline administration, academics, and communication across admissions, attendance, exams, fees, payroll, SMS, documents, and a public Web CMS.

Client:6 schoolsRole:Lead full-stack architect

ReactTypeScriptTailwind CSSZustandExpress.js+3

schools onboarded

3,000+

users supported

250+

documented APIs

View Details

Project

Completed

Litigation Management System

A production-grade litigation management platform for banks and financial institutions to manage cases, borrowers, documents, security arrangements, approvals, reporting, and audit trails at branch scale.

Client:Bank / financial institutionRole:Full-stack product engineer

.NET 9ASP.NET CoreEF Core 9SQL ServerReact 19+12

124

branches covered

5,000

alerts per day

domain areas

Demo View Details

Project

Completed

WordRizz - AI Powered Vocab App

A comprehensive vocabulary learning mobile application featuring smart word search with autocomplete, curated word pack subscriptions (IELTS, GRE, SAT), interactive quizzes, analytics dashboard for progress tracking, community feed, reviews and ratings, dark mode, multi-language support with i18next, and JWT-based secure authentication with MMKV storage.

Client:Consumer mobile appRole:Sole mobile engineer

React NativeTypeScriptJavaScripti18nextMMKV+4

word-pack tracks

mobile screens

languages ready

View Details

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Latest Writing

Guides and engineering notes on web development, backend systems, and system design.

View all articles

ClaudeReact

How to Create a .claude Folder for a Frontend SPA

A practical blueprint for structuring Claude project memory, skills, agents, rules, commands, hooks, and templates for a React + TypeScript + Vite single-page app.

May 29, 2026

fastapidocker

Deploying a FastAPI Backend on DigitalOcean with Dokploy and Docker

A practical production deployment setup for FastAPI using Docker and Dokploy on a DigitalOcean VPS, with PostgreSQL, HTTPS, and operational hardening.

May 6, 2026

researchliterature review

The 9 Prompts That Turn a Stack of Papers Into a Real Literature Map

A practical prompt system for moving from paper summaries to a structural map of any research field.

Apr 21, 2026

Process

How I Work

A battle-tested process designed for speed, transparency, and engineering rigor — from first call to production.

Discovery

Free 30-min call to understand your technical challenges, goals, and existing architecture.

Proposal

Tailored scope, timeline, and pricing delivered within 48 hours — no bloated SOWs.

Kickoff

Shared workspace setup — GitHub, Slack, Linear. I embed directly into your team's workflow.

Sprint Delivery

Weekly demos, async standups, and iterative delivery. You see progress every single sprint.

Handoff & Support

Full documentation, knowledge transfer, and optional retainer for long-term partnership.

Get in touch

Let's Connect

Have a project in mind, a role to fill, or just want to talk shop? My inbox is always open — I usually reply within a day.

Available for new projects

Have a project in mind?

Tell me what you're building. Whether it's a new product, a tricky backend, or a mobile app — I'll get back to you with honest, practical next steps.

Send me an email View Resume