Development services for the way your business works.
I’m Sayan Mondal, founder of Shotlin and Opslin. I build websites, mobile applications, custom software and the cloud systems behind them. I’m based in Kolkata, India and work remotely with businesses worldwide.
Website & Web App Development
Business websites, Next.js web apps and customer dashboards by Sayan Mondal. Founder-led development from Kolkata for remote clients worldwide.
Scope, project examples and questions →DevOps & Cloud Deployment
DevOps and cloud engineering by Sayan Mondal, founder of Opslin: Linux VPS deployment, Docker, CI/CD, monitoring and application handover.
Scope, project examples and questions →Flutter App Development
Flutter app development for Android and iOS by Sayan Mondal. Explore customer apps, booking, commerce and store workflows with real project screens.
Scope, project examples and questions →Custom Software & AI Development
Custom software, Next.js dashboards, SaaS and AI workflows by Sayan Mondal, founder of Opslin and Shotlin. Explore real commerce and CRM projects.
Scope, project examples and questions →Start with a useful first release.
Tell me what your customers or team need to do, what is getting in the way today, and which systems are already in place. We can then discuss the smallest useful scope, the integrations it needs and how it will be maintained after launch.
You can explore actual app and platform screenshots in the portfolio before making an enquiry. Budget and timing depend on the agreed work; a clear brief is more useful than an estimate made without requirements.
Prepare your project brief.
The website and app project brief checklist covers audiences, workflows, integrations, budget, delivery and handover. It works whether you are comparing an independent developer or a software agency.