Md. Shahin
Sheikh
Full-Stack Software Engineer
Five years building the software that cannot afford to go down — marketplaces, booking engines, logistics and checkout flows for some of the busiest platforms in Bangladesh.
- 5+
- Years in production
- 12+
- Services shipped
- 99%
- On-time delivery
- 95%
- Client satisfaction
Open to select engagements — 2026
5+ years in production
I build the part users touch — and the part that keeps it standing.
I’m Shahin. For five years I’ve worked on systems that get judged in public: a national marketplace on flash-sale day, a flight search quoting thousands of fares at once, a checkout that has to clear on the first try.
Today I’m an engineer at Cartup, part of the Us Bangla Group, owning CRM, accounting and logistics end to end. Before that, at TechnoNext and Morpheus Soft, I led front-end work across four products, mentored three junior engineers, drew micro-service boundaries with gRPC and Kafka, and wired AI into search and support.
The through-line: an interface that feels effortless, on a backend that earns it.
Day to day
- Ship end to end — React and Next.js on the front, .NET and Node behind it
- Design micro-service boundaries with gRPC, Kafka, SAGA and CQRS
- Keep search and checkout fast when traffic spikes
- Wire AI into real surfaces: search, support, recommendations
- Mentor engineers through code review and knowledge-sharing sessions
- Languages
- English — Fluent · Bengali — Native
- Off the clock
- Traveling · Climbing · Science fiction · Movies
Teletalk Bangladesh
Software Engineer Intern · Dhaka, BD
First production code, written on the internal systems of a national telecom operator.
- Designed and implemented an approval system that cut processing time 40%
- Ran several projects in parallel under production pressure
- Documented system workflows and technical processes to support handover and maintenance
- 40%
- Faster processing
National telecom operator
Internal approval systems
Network operations- Approval system
- Workflow documentation
Morpheus Soft
Jr. Software Engineer · Dhaka, BD
Product engineering on a small, fast team — biometrics and crypto, usually starting from a blank file.
- Engineered PalmID OAuth — palm-scan and email-OTP login on Vite, React, Tailwind and WebAssembly
- Built a responsive crypto-platform front end for a global audience
- Implemented reusable UI components and responsive layouts consistent across devices and browsers
- 40%
- Less login friction
Crypto trading front end
Real-time market data
Global audience- PalmID OAuth
- Crypto platform
- Component system
TechnoNext Ltd.
Software Engineer · Dhaka, BD · Us Bangla Group
Lead engineer across four products — Cartup, Foodi, FirstTrip and US-Bangla Airlines — plus the shared library the other teams built on.
- Delivered production code across Cartup, Foodi, FirstTrip and US-Bangla Airlines
- Led research, development and architecture, cutting development time 20% with optimised workflows and a shared component library
- Mentored three junior engineers through structured knowledge-sharing and rigorous code review
- Worked with the AI/ML team on chatbot delivery and LLM optimisation research
- 5+
- Products delivered
- 98%
- On-time delivery
- 20%
- Less dev time
- 3
- Engineers mentored
Four product teams
Code review & mentoring
Shared component library- Cartup
- Foodi
- FirstTrip
- US-Bangla Airlines
- Shared component library
Cartup Ltd.
Software Engineer · Dhaka, BD · Us Bangla Group
One of Bangladesh’s largest online marketplaces. I ship the services behind it — CRM, logistics, inventory, accounting and an AI chatbot — and own three of them end to end.
- Built and shipped CRM, logistics, inventory, accounting and AI-chatbot micro-services
- Owned CRM, accounting and logistics end to end — API design and data modelling through responsive UI and post-release support
- Scoped, estimated and delivered complex features with cross-functional stakeholders under tight deadlines
- Optimised rendering and data-fetching, and championed reusable component patterns that sped up onboarding
- 7+
- Services delivered
- 99%
- On-time delivery
- 95%
- Client satisfaction
Logistics & fulfilment
Inventory
Marketplace storefront- CRM
- Logistics
- Inventory
- Accounting
- AI Chatbot
What I build with.
Five years of picking tools up. These are the ones that stayed.
Languages
- TypeScript
- JavaScript
- ◆C#
- C++
- ◆SQL
Frontend
- React
- Next.js
- Redux
- ◆React Query
- ◆Vite
- Tailwind
- ◆WebAssembly
Backend
- Node.js
- Express
- ◆Nest.js
- ◆.NET Core
- ◆REST
- ◆OAuth 2.0
- ◆gRPC
Architecture
- ◆Microservices
- ◆Clean architecture
- ◆Event-driven
- ◆Monolith
- ◆API design
Distributed
- Kafka
- Redis
- ◆SAGA
- ◆CQRS
- ◆gRPC
Databases
- PostgreSQL
- ◆SQL Server
- ◆MySQL
- MongoDB
Cloud & DevOps
- ◆AWS
- ◆Kubernetes
- Docker
- ◆HAProxy
- Linux
- ◆CI/CD
- ◆Git
AI & automation
- ◆LLM apps
- ◆RAG
- ◆AI chatbots
- ◆OpenAI
- Claude
- ◆Claude Code
Practices
- ◆Agile/Scrum
- ◆Code review
- ◆Mentoring
- ◆Figma
- ◆Jira
- ◆Postman
CartUp
E-commerce Marketplace · CRM · Logistics · Inventory · Accounting
A multi-seller catalogue, a warehouse, an accounts ledger and a support desk all have to agree on the same order — in public, on the busiest shopping day of the year.
A multi-seller marketplace with flash sales, real-time inventory and a checkout that has to hold on the busiest shopping day of the year.
- Built and maintained front-end modules for logistics, inventory, admin, accounting, seller and CRM
- Contributed backend for Products and a central authentication system on Node.js and PostgreSQL
- Designed CRM workflows for lead tracking and customer communication, improving visibility for sales and support
- 7+
- Services
- 6
- Modules owned
Multi-seller storefront
Flash-sale checkout
Inventory & logistics- Logistics
- Inventory
- Admin tools
- Accounting
- Seller portal
- CRM
- Products API
- Auth service
Foodi
Food Delivery · Front-end · Customer app & CRM
Three apps share one moving order: the customer watching, the restaurant cooking, the rider riding. Any of them going stale breaks trust.
A nationwide delivery network with three faces: customers ordering, restaurants onboarding, and fleet managers watching it all move.
- Built the front end across the customer-facing app and the CRM
- Cut load time 20% and lifted user retention 15% through performance work
- Integrated REST APIs with the backend teams for reliable, consistent data flow
- 20%
- Faster load
- 15%
- Better retention
Nationwide delivery
Restaurant onboarding
Live order tracking- Customer app
- CRM
- REST integration
- Performance
Firsttrip
Online Travel Agency · Search · Recommendations
Travel is chosen, not searched. The hard part is helping someone decide — not returning a list of fares.
Bangladesh’s leading travel booking platform — flights, holidays, visas and eSIM behind a single search box.
- Implemented personalised recommendations and expert-guidance features for trip planning
- Ensured seamless integration and high performance across the platform
- Shipped flows that let users plan, book and manage a journey in one place
Trip planning
Flights & holidays
Fare search- Personalised recommendations
- Expert guidance
- Trip planning
- Platform integration
Corsica Health
Telehealth · Front-end engineering
Medical intake asks a stranger for their weight, their history and their card. Every field is another reason to close the tab.
A US telehealth platform pairing patients with board-certified physicians for GLP-1 weight-management care — where trust is the product.
- Built the intake and onboarding flow for sensitive medical data
- Shipped the member portal for ongoing care and refills
- Wired Stripe subscriptions into the care-plan lifecycle
Patient intake
Physician care plans
US telehealth market- Intake & onboarding
- Member portal
- Stripe subscriptions
US-Bangla Airlines
Airline · Aviation · Booking · Check-in · Management
Every flow a passenger cannot finish online becomes a phone call to the desk — so search, booking and self-service have to work first time.
The passenger-facing surface of a regional carrier flying across Asia and the Middle East — search, booking and self-service.
- Developed flight-search, booking and management UI modules
- Kept performance reliable and the booking experience smooth across web platforms
Passenger booking
Check-in & self-service
Regional network- Flight search
- Booking
- Manage booking
- Web platform
PalmID OAuth
Biometric Authentication · Front-end · WebAssembly
A biometric is the one credential you cannot rotate. It must never leave the device that read it.
An identity provider that logs you in with your palm. Palm-print processing runs on-device in WebAssembly, so the biometric never leaves the browser.
- Built registration and login by palm scan (left and right) or email OTP
- Integrated WebAssembly modules for fast on-device palm-print processing
- Kept the biometric local — privacy-preserving by architecture, not by policy
- 40%
- Less login friction
Palm-scan authentication
On-device processing
Privacy by architecture- Palm-scan registration
- Palm-scan login
- Email OTP
- On-device WASM processing
Built in the open.
@Shahin-Sheikh
Lv 15 · Excavator
60 / 120 XP to next level
- Polyglot
- Veteran
- Prolific
- Starred
- 30
- Public repos
- 8
- Languages
- 9
- Stars earned
- 6
- Years on GitHub
Language mastery
- TypeScript6
- JavaScript5
- C#3
- MDX2
- Go2
- HTML1
- C++1
- Java1
Public repositories, read at build · level & XP score those numbers, they are not a GitHub metric
Browse the repositoriesWhat they say back.
Shahin moves between a Figma file and a production .NET service without dropping either. He shipped our checkout rewrite a sprint early, and it held on launch day.
Md. Rafiqul AlamEngineering Manager · TechnoNextHe treated our codebase like his own — refactored quietly, wrote the tests, left it cleaner than he found it. That is rarer than it should be.
Preet S.CTO · Corsica HealthThe AI search Shahin built for our marketplace lifted click-through on product discovery measurably. Calm, methodical, and his documentation was better than ours.
Md. Mehedi HasanSr. Team Lead · CartUpDeep technical range, a real sense for design, and the kind of teammate who makes a project easier to be on. We bring him back whenever we can.
Md. Sultan MahmudTechnical Manager · FoodiFive years, on one page.
Every role, every stack, and the projects behind them — laid out plainly. Read it here, or take a copy with you.
- 5+
- Years in production
- 12+
- Services shipped
- 99%
- On-time delivery
- 95%
- Client satisfaction
Where it started
BSc in Computer Science & Engineering
AIUB · Spring 2018 — Fall 2021
Thesis — Detecting fake news on social media using machine learning and natural language processing.
Published & certified
- Multimodal LLMs for Human–AI Interaction: A Unified Text, Image and Speech FrameworkPublication · 2022
- ICPC — International Collegiate Programming ContestContest · Apr 2021
- HackerRank — Frontend Developer, ReactCertification · Apr 2023
- Coursera — AI For EveryoneCertification · Jun 2020
Have something worth building?
I take on a small number of engagements each quarter — long-term contracts, fractional engineering leadership, and the occasional weekend AI experiment. Email reaches me fastest; tell me what you are building and where it hurts.
- Phone
- +880 1786 452354
- Website
- www.shahin-sheikh.com
- GitHub
- @Shahin-Sheikh