GSL Export Limited
01 / 04A custom export website + internal management system
Designed, built and deployed a custom web platform with role-based content management for GSL Export Limited.
Design · Full-stack · Deployment
Product EngineerFull-Stack Developer
Build digital products that hold up.
I help businesses and technical teams build, fix and improve digital products through hands-on full-stack implementation, production debugging, integrations and migrations.
- Full-Stack Implementation
- Production Debugging
- Integrations & Migrations
Selected Work
Selected work across products & systems.
Four snapshots of how I design, build and improve real digital products.
View live project
What I Help With
Build. Fix. Improve.
I help with new product implementation, production debugging and focused improvements to existing systems - including integrations, migrations and dependency replacement when they solve a real delivery problem.
01CAPABILITY
Build
Full-stack implementation for new product features, interfaces, dashboards and business systems - from customer-facing flows to the backend work that supports them.
02CAPABILITY
Fix
Production debugging for broken flows, integration failures, authentication or browser/device issues, and technical debt that is blocking delivery or day-to-day use.
03CAPABILITY
Improve
Existing products that need dependency replacement, integrations, migrations, architecture cleanup, or focused performance and UX improvements.
STAGE: FULL-STACK ASSEMBLY
ARCH: NEXTJS / POSTGRESLIVE SCHEMATIC
COORDINATE: SYSTEM_COREISOLATION: 100% DETERMINISTIC
PRECISION DELIVERY
CAPABILITY 01LIVE SCHEMATIC
Build
Full-stack implementation for new product features, interfaces, dashboards and business systems - from customer-facing flows to the backend work that supports them.
For agencies & partners
Need implementation capacity without losing the client relationship?
Agencies, consultants and operators already owning strategy can route React/Next.js product work, integrations, workflows, modernization or rescue to a hands-on product engineer — including agency-to-end-client delivery when the brief fits.
DripGym
Ketamine Wellness
Rifat AcademyAgency-to-end-client delivery · Product ownership
Client Reviews
What clients say about working together.
Real client video reviews from project relationships, presented in the reviewers’ own words with the relationship and attribution kept clear.
01 / 04Saad Dar · Demand Now AI
FEATURED REVIEW · 01 / 04
Saad Dar
Demand Now AI
Drip Gym
REVIEW 01 / 04VIDEO REVIEW
Saad Dar
Demand Now AI
Drip Gym
Select Review:
NOTES FROM THE WORK
Useful things learned while shipping.
First-hand notes on architecture decisions, production debugging, migrations and implementation trade-offs from real delivery work.
Featured note
Engineering··5 min read
How to Replace Google Places Autocomplete Without Rewriting Your Matching System
How I replaced an external location-search dependency with a self-hosted OpenStreetMap + SQLite autocomplete path while keeping the existing geospatial matching logic intact.
ABOUT
Product thinking.Hands-on implementation.
I’m Md Sadnan Hossen Shafin, a product engineer and full-stack developer working remotely with businesses and technical teams. I focus on understanding the problem, making practical technical decisions and implementing the work directly.
Md Sadnan Hossen Shafin
Product Engineer · Full-Stack Developer
CREDIBILITY & ROLES
01Founder & CEO
Marceline Studios
02Co-founder
Adexcell
START A CONVERSATION
Have something that needs to ship, work better, or stop breaking?
Send the problem, current context and what a good outcome looks like. I usually reply within one business day.