MasudMasud
Senior Software Engineer · Dhaka, Bangladesh

Md.MahafujurRahamanMasud

Senior software engineer and founder building offline-first mobile apps and resilient full-stack web platforms. I design end-to-end — from quiet, considered interfaces to the systems that hold them up.

Moto

"Build calm software. Ship with intent. Respect the user's time."

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Portrait of Md. Mahafujur Rahaman Masud
4.5+ years
Building software
✦ Senior Software Engineer
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0+Years developing
0+Products delivered
0K+Active users
0Countries served

/ About · Philosophy

Build Solutions. Solve Real Problems. Create Impact.
✦ Engineering outlook

Senior Full-Stack & Mobile Developer.

I am a results-driven engineer with over 4.5 years of experience building high-scale SaaS products, production APIs, and cross-platform mobile apps. Specialized in React/Next.js, Node/NestJS, React Native, and AWS cloud infrastructure.

Core Expertise

  • Frontend ArchitectureNext.js 14, TypeScript interfaces, and secure Manifest V3 Chrome extensions.
  • Backend & Distributed SystemsNestJS APIs, PostgreSQL scaling, Redis caching, and message queues.
  • Mobile EcosystemsReact Native, Expo workflow, SQLite caching, and biometric integrations.
  • AI-Integrated UXReal-time LLM pipelines, ATS builders, and voice-guided intake flows.
  • Product DeliveryCRM integrations, outbound automations, and custom shopping platforms.

/ Services

What I do — end to end.

01

Product Engineering

End-to-end build of web platforms and mobile apps — from architecture to ship. Embedded with founders as a long-term technical partner.

  • Architecture & system design
  • Web + mobile delivery
  • Founder partnership
→
02

Offline-first Mobile

React Native apps that work without connectivity. Local SQLite stores, conflict-free sync, and interfaces that feel native on every device.

  • React Native + Expo
  • SQLite + CRDT sync
  • EAS deployment
→
03

Full-stack SaaS

Multi-tenant Next.js + NestJS platforms built to scale — dashboards, automation engines, real-time inboxes, and the infra that holds them up.

  • Next.js + NestJS
  • PostgreSQL + Redis
  • Real-time systems
→

/ Process

A calm path from idea to shipped.

  1. 01

    Discover

    A focused sprint to map the problem, the user, and the smallest valuable cut—surfacing constraints early when mobile, offline, browser extensions, or multi-channel delivery matters. I leave you with a written scope and a clear plan.

    • Scope brief
    • Architecture sketch
    • Risk map
  2. 02

    Design

    Quiet, considered interfaces — flows and layouts anchored to the real data model, not placeholder copy. Implementation-ready specs and reusable patterns; I partner with designers when the project calls for deeper visual craft.

    • Flow & UI specs
    • Component patterns & tokens
    • Interactive prototype
  3. 03

    Build

    Weekly shippable increments. TypeScript end-to-end—from web apps to React Native—with offline-first and sync paths when the product demands them. Tested where it matters, with previews you can try each week.

    • Production app
    • CI/CD pipeline
    • Weekly previews
  4. 04

    Scale

    Once it's live, I tune what real users hit—performance, observability, and the next set of bets backed by data.

    • Monitoring
    • Performance tuning
    • Roadmap iteration
Next.jsReact NativeTypeScriptNestJSPostgreSQLTailwind CSSExpoGSAPNext.jsReact NativeTypeScriptNestJSPostgreSQLTailwind CSSExpoGSAP
Framer MotionDockerPuppeteerRedisPrismaAWSVitestPlaywrightFramer MotionDockerPuppeteerRedisPrismaAWSVitestPlaywright

/ Selected Work

Products shipped with intent.

A focused index of work spanning founder products, client engagements and engineering retainers — each shipped end-to-end.

05 projects · 2020 — 2026

/ Skills

A toolkit, used with restraint.

01

Frontend

  • Next.js✦
  • React✦
  • TypeScript✦
  • TanStack Router✦
  • Tailwind CSS✦
  • Framer Motion✦
  • GSAP✦
02

Mobile

  • React Native✦
  • Expo✦
  • SQLite✦
  • Offline-first sync✦
  • EAS✦
03

Backend

  • NestJS✦
  • Node.js✦
  • PostgreSQL✦
  • Prisma✦
  • Redis✦
  • REST✦
  • GraphQL✦
  • LLM APIs✦
  • AI-assisted discovery & search✦
  • Personalization & matching✦
04

Tooling & Infra

  • Docker✦
  • AWS✦
  • Cloudflare Workers✦
  • GitHub Actions✦
  • Vitest✦
  • Playwright✦
  • Puppeteer✦

/ Experience

4.5 years, shipped end-to-end.

  1. 2025 — Present

    Remote · Republic Plaza, Singapore

    Senior Software EngineerLeadSync.ai

    2-step path

    AI-assisted B2B outbound across web dashboard, APIs, React Native apps, and the Chrome extension — one product story across four surfaces. Grew from Mid into Senior while shipping end-to-end.

    Role progression

    1. Mid Software Engineer

      Mid2025 — 2026

      Shipped LeadSync across frontend, backend, mobile app, and Chrome extension — dashboard and inbox UX, services and integrations, and clients that share one sequencing model.

      • Built sequences, inbox, and CRM-connected flows on web and extension surfaces
      • Implemented and consumed APIs from backend services for mobile and dashboard features
      • Tuned UX and reliability on high-traffic dashboard, extension, and app paths

    2. Senior Software Engineer

      Senior2026 — PresentLatest role

      Senior scope across web, backend, mobile, and extension — mentoring, architecture for multichannel outbound, and sustainable releases on every surface.

      • Lead delivery when features span Next.js, services layer, React Native, and Chrome extension
      • Shape API and integration design so extension, mobile, and web honor the same tenancy and limits
      • Mentorship, reviews, and raising quality bar across stacks and regressions

  2. 2024 — 2025

    Remote

    Frontend LeadVioResume

    Frontend lead at VioResume — AI resume builder and job matcher. Owned the Next.js layer end-to-end: templates, resume flows, checker entry points, marketing surfaces, and how design became production UI.

    • Led frontend practice — architecture, patterns, and delivery quality for all Next.js surfaces
    • Shipped ATS-focused authoring, checker flows, matching UX, and calm marketing aligned with design
    • Mentored contributors and coordinated with backend on AI-guided flows and product narrative
    • Kept responsiveness, accessibility, and template consistency cohesive across app and marketing

  3. 2023 — 2024

    Onsite · Dhanmondi, Dhaka, Bangladesh

    Software EngineerCodeact Soft

    Shipped multiple products across frontend, backend, and mobile — Next.js/React web apps, Node.js services (Express, Prisma, MySQL), and React Native apps in production.

    • Owned frontend UI, backend APIs, and mobile clients for Renesa Bazar, Superstructure, Hej Care, and Pet Obsession
    • Stack mix: Next.js, TypeScript, Redux on web; Node.js, Express, Prisma, MySQL on server; React Native on mobile
    • Delivered two production mobile apps with aligned backend contracts and release cadence
    • Contributed to Tech-Concies — large-scale initiative spanning web services and clients
    • Performance, scalability, and UX improvements across frontend, backend, and app surfaces

  4. 2022 — 2023

    Remote

    MERN Stack DeveloperAide Business Solution

    Junior MERN engineer on an e-commerce ERP dashboard — Next.js and Tailwind on the front, Node.js, Express, and MongoDB on the back.

    • Built ERP dashboard with Next.js, React, and Tailwind CSS
    • Backend APIs with Node.js, Express, TypeScript, and Mongoose
    • Partnered with design to ship responsive, user-friendly interfaces
    • Led and mentored interns toward milestones and delivery quality

✦ Now booking · Q2 / Q3 2026

Have a quiet idea worth shipping?

I take on a small number of founder partnerships each quarter. If you're building something you care about for the long term, send a note — I'll reply within 24h.

Start a project→
masudhossainmbs129@gmail.com

/ Contact

Let's build something quietly great.

Replies within 24h