Backend
The engine behind your business
- PHP
- Laravel
- C#
- ASP.NET Core
- REST API design
// Enterprise software engineering
Payment systems and enterprise software, built to hold up in production
A senior engineering team specializing in payment integration, custom business systems, and high-performance data architecture. Laravel, Next.js, ASP.NET Core.
One payment. Every system connected.✓ Payment verified & recorded
// Track recordReal systems.
Real systems.
Recognizable organizations.
Our engineers have delivered production systems for teams at these organizations. Explore the work behind the names.
- Research & life sciences
Harvard’s Wyss Institute
Laboratory information managementExplore the project - Public health
UNICEF
WASH planning & reportingExplore the project - Tourism & commerce
BRAC
Otithi tour booking & paymentsExplore the project - Education
Asian University for Women
Laboratory School managementExplore the project
Engineering experience across research, public health, commerce and education.See all our work
// What we buildFive practice areas.
Five practice areas.
One senior team
From your first customer interaction to the systems running behind it, we build software around the way your business works.
- Practice 01Flagship
Payment Systems & Fintech Integration
Accept cards, mobile payments, and EMI. Keep every transaction connected and accounted for.
- Card, mobile & EMI payments
- Refunds & reconciliation
- Secure webhooks & retries
Ideal forExplore this serviceBusinesses connecting multiple payment providers
- Practice 02
Custom Enterprise Software
Bring your operations, people, and workflows together in software built around your business.
- ERP & management systems
- Roles, permissions & SSO
- Approvals & reporting
Ideal forExplore this serviceTeams replacing spreadsheets and manual workflows
- Practice 03
Web Applications & E-Commerce
Fast, intuitive websites, online stores, and booking platforms your customers enjoy using.
- Online stores & bookings
- CMS & content platforms
- Customer accounts
Ideal forExplore this serviceBusinesses building a better digital customer experience
- Practice 04
Database & Performance Engineering
Faster queries, reliable reporting, and data systems that keep up as your business grows.
- Query & index optimization
- Database migrations
- Search & reporting
Ideal forExplore this serviceSystems held back by slow queries or growing data
- Practice 05
Legacy Modernization
Give your existing software a fresh start with modern technology and better performance.
- Framework upgrades
- Modular architecture
- Performance recovery
Ideal forExplore this serviceExisting software that needs to evolve with your business
// Proof
Selected work
E-Commerce / Tourism● Live
BRAC Otithi E-Commerce
- Laravel
- Tailwind
- MySQL
- Cybersource
- PortPOS
100+ transactions daily
Architecture and full-stack engineering delivered for BRAC by our lead engineer.
Education / MISIn-house
AUW Laboratory School MIS
- Laravel
- Tailwind
- MySQL
500+ monthly fee transactions
Comprehensive MIS software delivered for Asian University for Women (AUW) by our lead engineer.
Public Health / NGO● Live
UNICEF BD Washdata
- PHP
- MariaDB
- Bootstrap
- GeoJSON
~85% query performance improvement
Geospatial data platform architecture delivered for UNICEF Bangladesh by our lead engineer.
// Stack
The technology behind the work
From the interface to the infrastructure. Built to work together.
Frontend
Interfaces people enjoy using
- Next.js
- React
- Angular
- Vue.js
- TypeScript
- Tailwind CSS
Database
Data that stays fast as you grow
- MSSQL
- MySQL
- MariaDB
- PostgreSQL
- Query optimization
Payments
Every transaction, connected and accounted for
- Card processing
- Mobile financial services
- EMI
- Webhooks/IPN
- Reconciliation
- SSO/OAuth
Infrastructure
From deployment to dependable operations
- Docker
- GitHub Actions CI/CD
- Linux
- Load balancing
// How we differ
What working with a senior-only team changes
Typical agency
Who builds it
Junior developers on delivery, seniors on sales calls
Payment expertise
Payment work outsourced or declined
Technology choice
Single-stack shop; your problem reshaped to fit their tools
Project pricing
Hourly billing with no ceiling
Code ownership
Ambiguous code ownership
Rosshi Tech
Who builds it
Senior engineers only. The people who scope your project build it.
Payment expertise
Payment integration is our core specialization, not an add-on.
Technology choice
Dual ecosystem — Laravel/Next.js and ASP.NET Core/MSSQL.
Project pricing
Fixed-price scopes agreed upfront.
Code ownership
You own all source code and IP on delivery.
// Team
The people who build it
Meet the people behind the planning, engineering, and delivery of your project.
Saif Mohammed
Client Relations & Business Operations
Focus & expertise
- Client discovery
- Requirements translation
- Delivery
- IELTS 8
SM. Arhab Safwan
Lead Engineer — Payments & Product
Focus & expertise
- Laravel
- Next.js / React
- Payment integration
- MySQL
Mohammad Yousuf Hossain Anik
Lead Engineer — Enterprise Systems & Data
Focus & expertise
- ASP.NET Core
- Angular
- MSSQL
- AWS Certified Solutions Architect (Associate)
// Process
How an engagement runs
- 01
Discovery
Requirements audit and scope document.
- 02
Architecture & estimate
Fixed-price quote agreed before work begins.
- 03
Sprint delivery & QA
Working software delivered in scoped increments.
- 04
Deployment & support
Production launch, handover, and a 30-day warranty.
// FAQ
Frequently asked
A few things worth knowing before we build together.
Where is your team based?
We're based in Dhaka, Bangladesh, and work overlapping hours with US Eastern and European business days.
Who owns the code?
You do — full source and IP transfer on final delivery.
How do you price work?
Fixed-price scopes for defined projects; monthly retainers for ongoing work. Ranges published on our pricing page.
What happens after launch?
30-day warranty on delivered work, with optional maintenance retainers.
Can you work with our existing team?
Yes — we take white-label and staff-augmentation engagements. See /partners.
How quickly can you start?
Typically within one to two weeks.
Will I be talking to a salesperson?
No. Saif handles client relationships and delivery coordination — he's your consistent point of contact, not a commission-driven intermediary. The engineers who will build your project join technical scoping calls directly, and stay reachable throughout.
Have a question about your project?
Tell us what you have in mind. We’ll help you work out the next step.
// Start a project
Tell us about your project
Get in touch with us directly via email, WhatsApp, or phone call. We're ready to bring your vision to life.