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Building a better internet at scale.


Our suite of scalable web products and services help you build, secure, and deliver mobile responsive websites, customized e-commerce solution, performant cloud systems, enterprise-grade mobile apps in less time. Read more for our humble beginnings as a freelance web designer in Singapore.

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Website Design Ecommerce Solution Mobile Applications Custom Development Cloud Systems Artificial Intelligence Progressive Web Apps Enhanced Security

Welcome to Calvin Seng Co

Established since 2008, Calvin Seng Co is a mobile app development & web development company from Singapore. We strive to offer a better-honest-no bullshit experience in using the latest web technologies for the multitudes of small-to-large business owners, multinational corporates and beyond to launch, grow and navigate through digital adoptions. Our in-house web designers and mobile app developers help you digitalise and transform the way businesses operate, bringing in new revenue sources, improved customer experiences and streamlined processes via our 6 pillars of Digital Mastery.

Website Design

We own the capabilities to develop stunning SEO-friendly corporate website design, web portals, e-Commerce web design, customized web solutions and mobile apps that are modern, performance obsessed and user-friendly.

Ecommerce Solution

Spend more time on what matters. Our PSG Grant pre-approved ecommerce web development takes care of the rest, with a suite of powerful online selling features for every type of industry. Secure payments, configurable shipping options, subscriptions, and more.

Cross-Platform Applications

Develop a progressive web app (PWA) that uses modern web capabilities to deliver an app-like experience to users with Ionic Framework that even big brands are jumping on. Work for every user, regardless of browser choice. Highly optimized, reliable, and accessible.

Search Engine Optimization

Our SEO services are based on practice and result implementation that guarantees propelling your business forward. Our team work to develop the most effective course of action and using solution that best supports your overall strategy.

Managed Services

Adhere to the best security standards and web practises, we provide an array of IT services encompassing Enhanced Security, Content Management, Managed Hosting and Domain to simplify your day-to-day administrative works.


Artificial Intelligence

Harness the power of OpenAI, the leading provider of cutting-edge AI language models to help your business automate the rudimentary tasks such as Idea Generation, Qualifying Candidates, Automated Responses, Legal Documents Verification.

Powering incredible app experiences at the world’s best companies

Get up-to 50% funding for your next ecommerce website development project. We support website customization and mobile apps development.

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Real Clients' Experience

Voted #1 On Google
As The Best Web Designer In Singapore

The web design and mobile app development industry is changing, which is why we make sure our clients are ready to change with it. A world-class app is the result of world-class products and services. We are now a full stack web development company.


What we use for web & mobile app development.

January 16, 2024 in Mobile Apps

Harnessing the Potential of Ionic Capacitor and Angular: Cutting-Edge Mobile Application Development

In today's rapidly evolving technological landscape, businesses are constantly seeking innovative ways to stay ahead of the competition and reach their target audience effectively. With the increasing popularity of mobile…
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January 12, 2024 in Web design

Exploring the Power of WordPress: Unleashing the Latest Web Design and Development Trends

Introduction Definition and Importance of WordPress Web Design The power of WordPress is undeniable. With its latest web design inspiration and development trends, it has revolutionized the way websites are…
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April 22, 2023 in e-Commerce

Top 3 benefits of using Woocommerce for ecommerce web development in 2023

In 2023, ecommerce continues to thrive and is increasingly becoming a crucial aspect of business growth. To succeed in ecommerce, businesses need to have a website that is not only…
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April 15, 2023 in Mobile Apps

Top 5 reasons to build mobile apps using Ionic Framework

Mobile app development has become a crucial aspect of many businesses, from startups to large corporations in Singapore. With the increasing demand for mobile apps, developers in Singapore need to…
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Case Studies

The team in action.

See how we have helped countless businesses, big and small, set up their new domain on digital space; deliver award-winning, SEO-friendly, mission-critical websites and enterprise mobile apps.

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Ready for the next project? Reach out now.