Full Stack AI Engineer.

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01 — About

Hi, I'm Sajjad.

Full-stack engineer with a backend focus, building payment, marketplace and ledger systems end to end. Currently sole backend engineer on a luxury watch marketplace and a backend engineer on a double-entry ledger platform integrating with a US bank. A business degree gives me a working grip on the money side of the systems I build.

Self-taught programmer, freelancing since 2018.

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Quick facts
Location
Lalmonirhat, Bangladesh
Education
BBA, National University, Bangladesh
Current role
Backend Engineer at Dialist and OutCode
Email
sajjadmugdho@gmail.com

“I build payment, marketplace and ledger systems end to end.”

02 — The stack

The periodic table of my stack.

03 — Selected work

Things I've built.

01 / Hotel booking system

Stay Hotel

A full-stack booking system built with Next.js App Router and API routes, with Stripe payments and server-side rendering for speed and SEO.

  • Hotel CRUD with search and filters
  • Clerk login and sign-up
  • Stripe checkout
  • Sitemap and robots for SEO
  • Global state with Zustand
  • Unit tests with Jest
Next.jsTypeScriptPrismaMongoDBClerkTailwind CSS
View on GitHub ↗Live site ↗
02 / Digital SVG/DXF marketplace

vectoroutlines.com

Rebuilt in Next.js 15 and Prisma after a server loss.

Next.jsPrisma
03 / Crypto swap frontend

InstantSwap

Next.js frontend built from a full PRD and design system.

Next.js
04 / Credit card comparison site

CreditCardify

A credit card comparison site built with Next.js.

Next.js
04 — Certifications

Always learning.

7 certifications

  1. 01CS50xHarvard University (online)
  2. 02Complete Web Development, Level 1Programming Hero
  3. 03Complete Web Development, Level 2Programming Hero
  4. 04Digital GarageGoogle
  5. 05Prompt Engineering with ChatGPT
  6. 06Sample CertificationSample Issuer
  7. 07Sample CertificationSample Issuer
05 — Experience

The path so far.

2015

Secondary School Certificate

Lalmonirhat Govt. High School

  • Business Studies

2017

Higher Secondary Certificate

Cantonment Public School & College Saidpur

  • Business/Commerce

Since 2018

Freelance Developer

Fiverr

2020 to 2024

MERN Stack and React Developer

Upwork

2018 to 2022

Bachelor of Business Administration

National University, Bangladesh

  • Business Administration and Management

Oct 2023 to Mar 2024

Full-stack Developer

Bilsida.se, Stockholm (remote)

  • Developed a CMS for car dealers to manage listings, accessories, locations and salespeople
  • Connected the dealer site to the public site, so updates reach users
  • Used Appwrite for APIs and authentication, and optimized image and video loading

Jan 2024 to Dec 2024

Frontend Developer

Pflegetech (now CodeBanglaX), Dhaka

  • Built and optimized an ERP UI with React
  • Developed real-time ERP chat with WebSockets
  • Built user, role and permission management
  • Managed and reviewed the code of 2 junior frontend developers

Dec 2024 to Jul 2025

Full-stack Developer

VySy, Dhaka

  • Developed microservices with NestJS
  • Integrated Redis caching to reduce database reads
  • Used Next.js ISR and SSR to improve load time and SEO
  • Contributed to the CI/CD pipeline

Aug 2025 to Oct 2025

Frontend Developer

admark.ai, remote

Present

Backend Engineer

OutCode

  • Double-entry ledger platform integrating with a US bank through a core-banking bridge
  • Built core ledger features
  • Bank integration: posted-activity ingestion, circuit breaker, rate limiting and unknown-state resolution
  • Supporting sandbox certification for the bank integration

Present

Backend Engineer (sole backend engineer)

Dialist

  • Built the Marketplace backend from scratch: full order and offer lifecycle
  • Integrated Finix payments and merchant onboarding, and built dealer subscriptions
  • Set up shared Clerk authentication across mobile and web
  • Integrated GetStream chat, EasyPost shipping webhooks and Google Address Validation
  • Built search filters and facets on MongoDB Atlas Search
  • Set up S3 and CloudFront image delivery on a custom domain
  • Ran a security audit of the marketplace backend and addressed the critical findings

Next: Your team?

06 — Achievements

Numbers I'm proud of.

01 / 04

Sample achievement

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100+
02 / 04

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50+
03 / 04

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25
04 / 04

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10

and counting →

sajjadmugdho@gmail.com
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